阅读说明：本技术 信号产生装置及产生方法和误码率测量装置及测量方法 (Signal generation device and production method and measuring device for error code rate and measurement method ) 是由 岩井达也 于 2019-04-02 设计创作，主要内容包括：以成为指定的PAM4符号的方式控制错误插入。在信号产生装置中,其产生PAM4信号,且具备：第1信号生成机构,生成最高有效位信号流；第2信号生成机构,生成最低有效位信号流；及信号合成机构,叠加所述最高有效位信号流与所述最低有效位信号流而产生PAM4信号,所述信号产生装置的特征在于,具备：掩码生成机构,根据表示所述PAM4信号的4个PAM4符号的过度目标的符号过渡信息,相对于所述最高有效位信号流及所述最低有效位信号流各自的比特流,生成区别允许错误插入的比特与禁止错误插入的比特的各自的掩码图案；及错误插入机构,设置于所述信号合成机构的前段,并根据所述掩码图案插入错误。(It is controlled and is erroneously inserted in a manner of becoming specified PAM4 symbol.In signal generation device, generate PAM4 signal, and have: the 1st signal generating mechanism generates most significant bit signal stream；2nd signal generating mechanism generates least significant bit signal stream；And signal combination mechanism, it is superimposed the most significant bit signal stream and the least significant bit signal stream and generates PAM4 signal, the signal generation device is characterized in that, have: mask generating mechanism, according to the excessive mesh aiming symbol transitional information for 4 PAM4 symbols for indicating the PAM4 signal, relative to the most significant bit signal stream and the respective bit stream of least significant bit signal stream, the bit that difference allows to be erroneously inserted and the respective mask pattern for forbidding the bit being erroneously inserted are generated；And it is erroneously inserted mechanism, it is set to the leading portion of the signal combination mechanism, and according to the mask pattern inserting error.)

1. a kind of signal generation device (2) generates PAM4 signal, and has:

1st signal generating mechanism (12) generates most significant bit signal stream；

2nd signal generating mechanism (13) generates least significant bit signal stream；And

Signal combination mechanism (16) is superimposed the most significant bit signal stream and the least significant bit signal stream and generates PAM4 Signal, the signal generation device are characterized in that having:

Mask generating mechanism (14) is believed according to the excessive mesh aiming symbol transition for 4 PAM4 symbols for indicating the PAM4 signal Breath, relative to the most significant bit signal stream and the respective bit stream of least significant bit signal stream, generating difference allows mistake The bit being mistakenly inserted and the respective mask pattern for forbidding the bit being erroneously inserted；And

Mechanism (15) are erroneously inserted, are set to the leading portion of the signal combination mechanism, and according to the mask pattern inserting error.

2. signal generation device according to claim 1, which is characterized in that

It is described be erroneously inserted mechanism based on the most significant bit signal stream and described minimum specified according to symbol error rate The corresponding mask pattern inserting error of the respective each bit of significance bit signal stream.

3. signal generation device according to any one of claim 1 or 2, which is characterized in that

The symbol transitional information is set as PAM4 symbol only 1 symbol of transition.

4. a kind of measuring device for error code rate, which is characterized in that have:

Signal generation device described in any one of claims 1 to 3 (2)；And

Measurement of error code instrument (3) receives coming from the PAM4 signal for inputting the signal generation device generation to measured object (W) The signal of the measured object and measure the bit error rate.

5. a kind of signal generating method generates PAM4 signal, and includes:

The step of generating most significant bit signal stream；

The step of generating least significant bit signal stream；And

It is superimposed the signal that the most significant bit signal stream generates PAM4 signal with the least significant bit signal stream and synthesizes step Suddenly, the signal generating method is characterised by comprising:

According to the excessive mesh aiming symbol transitional information for 4 PAM4 symbols for indicating the PAM4 signal, relative to the highest Significance bit signal stream and the respective bit stream of least significant bit signal stream generate and distinguish the bit for allowing to be erroneously inserted and forbid The step of respective mask pattern for the bit being erroneously inserted；And

It is carried out before the signal synthesis step, and the step of according to the mask pattern inserting error.

6. signal generating method according to claim 5, which is characterized in that

The step of inserting error based on according to symbol error rate specify the most significant bit signal stream and it is described most The corresponding mask pattern inserting error of the respective each bit of low order signal stream.

7. the signal generating method according to any one of claim 5 or 6, which is characterized in that

The symbol transitional information is set as PAM4 symbol only 1 symbol of transition.

8. a kind of error rate measurement method characterized by comprising

The PAM4 signal generated by signal generating method described in any one of claim 5 to 7 is input into measured object (W) The step of；And

Reception is adjoint to be inputted the signal from the measured object of the PAM4 signal to the measured object and measures the bit error rate Step.

Technical field

The present invention relates to a kind of (4-level Pulse Amplitude Modulation: four of PAM4 desired by generation Grade level pulse amplitude modulation) signal signal generation device and signal generating method and using PAM4 signal as test signal it is defeated Enter measured object (DUT:Device Under Test) and measures the bit error rate of bit error rate (BER:Bit Error Rate) Measuring device and error rate measurement method.

Background technique

By IEEE (Institute of Electrical and Electronics Engineers (electric and electronic work Teachers learn)) as defined in 100G or 400G etc. standard in, be not that regulation is at present to cope with the ultrahigh speed of bit rate The transmission based on PAM2 (NRZ:Non Return to Zero (non-return-to-reference)) signal only, but provide to be based on PAM4 signal Transmission.

About PAM4 signal, for example, as described in Patent Document 1 below, generating most significant bit using 2 signal sources (MSB:Most Significant Bit) signal stream MSB and least significant bit (LSB:Least Significant Bit) letter Number stream LSB after, by being superimposed these signals, can be produced as the signal of 0 (00), 1 (01), 2 (10), this 4 values of 3 (11) It is raw.

But when considering simulation bit-errors as caused by the influence of Signal Degrade in physical layer etc., in mesh Before until NRZ signal in, the transition of value only has 0 → 1 or 1 → 0, therefore only inverts ratio in the most latter end of signal generation device Spy just can simulate bit-errors.

Patent document 1: Japanese Unexamined Patent Publication 2018-033098 bulletin

However, existing when for PAM4 signal based on most significant bit signal stream MSB and least significant bit signal stream LSB 2 bits.Therefore, if it is only anti-to 4 PAM4 symbols 0 (00), 1 (01), 2 (10), 3 (11) progress bit in most latter end Turn, then becomes 0 (00) → 3 (11), 1 (01) → 2 (10), 2 (10) → 1 (01), 3 (11) → 0 (00).

Moreover, being influenced under this above-mentioned precondition in analog signal deterioration etc., it is believed that the transition of PAM4 symbol is 1 symbol Number, if but bit reversal, such as 0 (00) → 3 (11) or 3 (11) → 0 (00) only are carried out to 4 PAM4 symbols in most latter end, Sometimes the transition of symbol will not become 1 symbol, to there are problems that usual impossible mistake is inserted into this.Therefore, The signal generation device being erroneously inserted can be controlled in a manner of becoming specified PAM4 symbol by being desirable to provide.

Summary of the invention

The present invention is to complete in view of the above problems, and its purpose is to provide one kind can be to become specified PAM4 The mode of symbol controls the signal generation device being erroneously inserted and signal generating method and is controlled according to being erroneously inserted PAM4 signal is able to carry out the measuring device for error code rate and error rate measurement method of error rate measurement.

To achieve the goals above, signal generation device described in technical solution of the present invention 1 generates PAM4 signal, and has It is standby:

1st signal generating mechanism 12 generates most significant bit signal stream；

2nd signal generating mechanism 13 generates least significant bit signal stream；And

Signal combination mechanism 16 is superimposed the most significant bit signal stream and generates with the least significant bit signal stream PAM4 signal, the signal generation device are characterized in that having:

Mask generating mechanism 14, according to the excessive mesh aiming symbol transition for 4 PAM4 symbols for indicating the PAM4 signal Information, relative to the most significant bit signal stream and the respective bit stream of least significant bit signal stream, generating difference allows The bit being erroneously inserted and the respective mask pattern for forbidding the bit being erroneously inserted；And

It is erroneously inserted mechanism 15, is set to the leading portion of the signal combination mechanism, and mistake is inserted into according to the mask pattern Accidentally.

Signal generation device described in technical solution 2 is characterized in that,

It is described be erroneously inserted mechanism based on the most significant bit signal stream and described specified according to symbol error rate The corresponding mask pattern inserting error of the respective each bit of least significant bit signal stream.

Signal generation device described in technical solution 3 is characterized in that,

The symbol transitional information is set as PAM4 symbol only 1 symbol of transition.

Measuring device for error code rate described in technical solution 4 is characterized in that having:

Signal generation device 2 described in any one of claims 1 to 3；And

Measurement of error code instrument 3 receives coming from the PAM4 signal for inputting the signal generation device generation to measured object W The signal of the measured object and measure the bit error rate.

Signal generating method described in technical solution 5 generates PAM4 signal, and includes:

The step of generating most significant bit signal stream；

The step of generating least significant bit signal stream；And

The signal for being superimposed the most significant bit signal stream and the least significant bit signal stream and generating PAM4 signal closes At step, the signal generating method is characterised by comprising:

According to the excessive mesh aiming symbol transitional information for 4 PAM4 symbols for indicating the PAM4 signal, relative to described Most significant bit signal stream and the respective bit stream of least significant bit signal stream, generate the difference bit that allows to be erroneously inserted with The step of forbidding the respective mask pattern for the bit being erroneously inserted；And

It is set to the leading portion of the signal combination mechanism, and the step of according to the mask pattern inserting error.

Signal generating method described in technical solution 6 is characterized in that,

Be inserted into the wrong step based on according to symbol error rate specify the most significant bit signal stream and institute State the corresponding mask pattern inserting error of the respective each bit of least significant bit signal stream.

Signal generating method described in technical solution 7 is characterized in that,

The symbol transitional information is set as PAM4 symbol only 1 symbol of transition.

Error rate measurement method described in technical solution 8 characterized by comprising

The PAM4 signal generated by signal generating method described in any one of claim 5 to 7 is input into tested The step of object W；And

Reception is adjoint to be inputted the signal from the measured object of the PAM4 signal to the measured object and measures error code The step of rate.

Invention effect

It is erroneously inserted in accordance with the invention it is possible to be controlled in a manner of becoming specified PAM4 symbol, and also copes with The simulation of the bit-errors as caused by the influence of Signal Degrade in physical layer etc..

Detailed description of the invention

Fig. 1 is the frame for indicating the outline structure of the measuring device for error code rate comprising signal generation device according to the present invention Figure.

Fig. 2 is that the signal generation device of related measuring device for error code rate through the invention generates inserting error Flow chart when PAM4 signal.

Fig. 3 (a), Fig. 3 (b) are the PAM4 letters for being erroneously inserted front and back indicated in signal generation device according to the present invention Number an example figure.

Specific embodiment

Hereinafter, mode for carrying out the present invention is described in detail with reference to attached drawing.

As shown in Figure 1, the measuring device for error code rate 1 of present embodiment is generally constructed to have signal generation device 2 and miss Code measuring instrument 3, and measured object (DUT:Device Under is input into using the PAM4 signal of known pattern as test signal Test) to measure bit error rate (BER:Bit Error Rate).

As shown in Figure 1, signal generation device 2 is generally constructed to have set mechanism 11, the 1st signal generating mechanism the 12, the 2nd Signal generating mechanism 13, mask generating mechanism 14 are erroneously inserted mechanism 15 and signal combination mechanism 16, and to become specified The mode of PAM4 symbol, which controls, to be erroneously inserted and generates PAM4 signal.

Set mechanism 11 carries out the setting of symbol error rate and symbol transitional information.The setting for example can be (not shown) It is carried out on the setting screen of indication mechanism via user interface.

Symbol transitional information be indicate 4 PAM symbols of PAM4 signal when being erroneously inserted each symbol each Excessive target information.For example, when simulation bit-errors as caused by the influence of Signal Degrade in physical layer etc., such as Symbol 0 (00) → symbol 1 (01), symbol 1 (01) → symbol 2 (10), symbol 2 (10) → symbol 1 (01), symbol 3 (11) → symbol Number 2 (10), set symbol transitional information in a manner of PAM4 symbol only 1 symbol of transition.

In addition, symbol error rate or symbol transitional information are pre-stored within storing mechanism (not shown), it also can be by setting Determine mechanism 11 suitably to select to set via user interface.Also, symbol transitional information is not limited to the transition of 1 symbol, It can arbitrarily set.

1st signal generating mechanism 12 generates the least significant bit signal stream LSB for generating with the 2nd signal generating mechanism 13 It is superimposed and generates the most significant bit signal stream MSB of PAM4 signal.

2nd signal generating mechanism 13 generates the most significant bit signal stream MSB for generating with the 1st signal generating mechanism 12 It is superimposed and generates the least significant bit signal stream LSB of PAM4 signal.

The most significant bit signal stream MSB and lead to that the superposition of mask generating mechanism 14 is generated by the 1st signal generating mechanism 12 It crosses bit corresponding to the least significant bit signal stream LSB of the 2nd signal generating mechanism 13 generation and generates PAM4 signal each other.

Also, mask generating mechanism 14 defines the bit for allowing to be erroneously inserted and taboo with different bit information (0,1) The bit being only erroneously inserted, and generate most significant bit respectively according to symbol transitional information and using bit information (0,1) and believe Number stream MSB mask pattern and least significant bit signal stream LSB mask pattern.For example, mistake will be allowed as bit information The bit definitions of insertion are 0, and will forbid the bit definitions being erroneously inserted is 1, and effective according to symbol transitional information generation highest The mask pattern of position signal stream MSB and the mask pattern of least significant bit signal stream LSB.Moreover, mask generating mechanism 14 will most High significance bit signal stream MSB, least significant bit signal stream LSB and most significant bit signal stream MSB and least significant bit signal The stream respective mask pattern of LSB is exported to being erroneously inserted mechanism 15.

Be erroneously inserted the confirmation of mechanism 15 with according to being erroneously inserted the specified most significant bit signal stream MSB of solicited message and most The bit information of the corresponding mask pattern of the respective each bit of low order signal stream LSB, when the bit information of mask pattern is permitted When being permitted to be erroneously inserted, to the bit inserting error.

It is determined in addition, being erroneously inserted solicited message according to the symbol error rate set by set mechanism 11, therefore is pair Which bit is erroneously inserted and the information for the bit that specified request error is inserted into from input.

The superposition of signal combination mechanism 16 is based on the most significant bit signal stream after being erroneously inserted being erroneously inserted of mechanism 15 MSB and least significant bit signal stream LSB simultaneously exports PAM4 signal.PAM4 signal conduct when measuring the bit error rate of measured object W The test signal of known pattern and be input into measured object W.

If the test signal from signal generation device 2 as known pattern inputs PAM4 signal to measured object W, error code is surveyed Amount instrument 3 receives with the signal from measured object W for inputting the PAM4 signal and measures the bit error rate.

Then, in the signal generation device 2 of the measuring device for error code rate 1 constituted in the above described manner, refer to as to become The mode of fixed PAM4 symbol controls the method for being erroneously inserted and generating PAM4 signal, to compare the 3rd from input and the 6th Special inserting error and son is illustrated in case where generating PAM4 signal.

In addition, the bit definitions for allowing to be erroneously inserted are " 0 ", will prohibited by bit information when about generation mask pattern The bit definitions being only erroneously inserted are " 1 ".

Firstly, setting symbol transitional information by set mechanism 11.For example, such as symbol 0 (00) → symbol 1 (01), symbol 1 (01) → symbol 2 (10), symbol 2 (10) → symbol 1 (01), symbol 3 (11) → symbol 2 (10), with PAM4 symbol only transition 1 The mode of symbol sets symbol transitional information.

Also, symbol error rate (such as 1 × 10 is set by set mechanism 11^-5).For example, using as the from input the 3rd The bit of a and the 6th bit (from the 3rd from right to left and the 6th bit) request error insertion and specified mode sets symbol mistake Accidentally rate.

Setting more than end and when generating PAM4 signal, the 1st signal generating mechanism 12 generates most significant bit signal MSB is flowed, the 2nd signal generating mechanism 13 generates least significant bit signal stream LSB (ST1).

In the example in fig 1, the 1st signal generating mechanism 12 comes " 00202202 " as most significant bit signal stream MSB It generates.Also, the 2nd signal generating mechanism 13 generates " 10111000 " as least significant bit signal stream LSB.

Then, in mask generating mechanism 14, in the most significant bit signal stream generated by the 1st signal generating mechanism 12 In the MSB and least significant bit signal stream LSB generated by the 2nd signal generating mechanism 13, be superimposed corresponding bit each other and It generates PAM4 signal (ST2).

In the example in fig 1, most significant bit signal stream MSB is " 00202202 ", and least significant bit signal stream LSB is " 10111000 ", therefore as shown in Fig. 3 (a), " 10313202 " are generated as PAM4 signal.

Also, mask generating mechanism 14 generates the mask of most significant bit signal stream MSB according to symbol transitional information respectively The mask pattern (ST3) of pattern and least significant bit signal stream LSB.

For example, in Fig. 1, if concern from the input of PAM4 signal " 10313202 " the 3rd bit (from the 3rd from right to left Bit), then PAM4 symbol is symbol 2 (10).Moreover, symbol transitional information is symbol 2 (10) → symbol 1 (01), therefore to So that symbol 2 (10) is transitioned into symbol 1 (01), then needs to most significant bit signal stream MSB's and least significant bit signal stream LSB 3rd bit is erroneously inserted.Therefore, the mask pattern of most significant bit signal stream MSB and least significant bit signal stream LSB The 3rd bit of mask pattern both become the information " 0 " for allowing to be erroneously inserted.

Also, in Fig. 1, if concern from the input of PAM4 signal " 10313202 " the 6th bit (from the 6th from right to left Bit), then PAM4 symbol is symbol 3 (11).Moreover, symbol transitional information is symbol 3 (11) → symbol 2 (10), therefore to So that symbol 3 (11) is transitioned into symbol 2 (01), does not then need to carry out wrong insert to the 6th bit of most significant bit signal stream MSB Enter, and needs to be erroneously inserted the 6th bit of least significant bit signal stream LSB.Therefore, most significant bit signal stream 6th bit of the mask pattern of MSB becomes the information " 1 " for forbidding being erroneously inserted, the mask figure of least significant bit signal stream LSB 6th bit of case becomes the information " 0 " for allowing to be erroneously inserted.

Moreover, in the example in fig 1, being believed according to the symbol transition set in a manner of PAM4 symbol only 1 symbol of transition Breath, the mask pattern of most significant bit signal stream MSB are generated as " 01101010 ", and least significant bit signal stream LSB's covers Code pattern is generated as " 00000000 ".

Then, in being erroneously inserted mechanism 15, confirmation and the most significant bit letter specified according to solicited message is erroneously inserted The bit information of number corresponding mask pattern of the respective each bit of stream MSB and least significant bit signal stream LSB.Moreover, if mask The bit information of pattern is the information for allowing to be erroneously inserted, then to the bit inserting error (ST4).

In the example in fig 1, it is the 3rd and the 6th according to the specified bit of solicited message is erroneously inserted, therefore confirms most The 3rd and the 6th bit information of high significance bit signal stream MSB and the respective mask pattern of least significant bit signal stream.Moreover, About most significant bit signal stream MSB, the 3rd bit information of mask pattern is the information " 0 " for allowing to be erroneously inserted, therefore right 3rd bit inserting error.Also, about least significant bit signal stream LSB, the 3rd of mask pattern and the 6th bit information For the information " 0 " for allowing to be erroneously inserted, therefore to the 3rd and the 6th bit inserting error.

Then, if being erroneously inserted by being erroneously inserted mechanism 15, signal combination mechanism 16 is superimposed most significant bit Bit corresponding to signal stream MSB and least significant bit signal stream LSB exports PAM4 signal (ST5) each other.

In the example in fig 1, the most significant bit signal stream MSB after being erroneously inserted is " 00202002 ", minimum effective Position signal stream LSB is " 10011100 ", therefore as shown in Fig. 3 (b), and " 10213102 " are believed as the PAM4 after being erroneously inserted It number exports.

Moreover, the test when PAM4 signal generated in the above described manner by signal generation device 2 is as the measurement bit error rate is believed Number and be input into measured object W.If PAM4 signal is input into measured object W, measurement of error code instrument 3 is received to be inputted with to measured object W The signal from measured object W of PAM4 signal and measure the bit error rate.

But in the above-described embodiment, allow as expression and forbid the bit information being erroneously inserted, mistake will be allowed The bit definitions of insertion are 0, and will forbid the bit definitions being erroneously inserted is 1 to produce mask pattern, but can also turn around and determine Justice.That is, also can be 1 by the bit definitions for allowing to be erroneously inserted, will forbid the bit definitions being erroneously inserted is 0 to generate mask Pattern.

In this way, according to the present embodiment, it, can be to become specified PAM4 when to arbitrary PAM4 symbol inserting error The mode of symbol, which controls, to be erroneously inserted.It also copes with and compares as caused by the influence of Signal Degrade in physical layer etc. as a result, The simulation of special mistake or the test of fault-tolerance.

More than, to signal generation device according to the present invention and signal generating method and measuring device for error code rate and error code The preferred embodiment of rate measurement method is illustrated, but the present invention is not limited to based on which narration and attached drawing.That is, root Other modes, embodiment and application technology for being implemented according to which by those skilled in the art etc. are both contained in model of the invention Farmland is self-evident.

Symbol description

1- bit error rate symbol measure device, 2- signal generation device, 3- measurement of error code instrument, 11- set mechanism, 12- the 1st believe Number generating mechanism, the 2nd signal generating mechanism of 13-, 14- mask generating mechanism, 15- are erroneously inserted mechanism, 16- signal synthesizer Structure, W-DUT (measured object).