CN102752098B - For the measurement of error code method synchronous based on pseudo-random code sequence of communication system - Google Patents
For the measurement of error code method synchronous based on pseudo-random code sequence of communication system Download PDFInfo
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Abstract
The invention discloses a kind of measurement of error code method synchronous based on pseudo-random code sequence for communication system, comprise the following steps: the one piece of data received by receiving terminal is loaded in LFSR as seed, generate the pseudo noise code reference number sequence corresponding with this segment data; This segment data is carried out comparison one by one with each bit in corresponding pseudo noise code reference number sequence, obtains error code number and the error rate, the comparative result according to the Signal reception threshold value of the described error rate and setting obtains synchronized result.The present invention, because the traversal search mechanism not adopting inefficiency, so Error detection step is simple, speed is fast, and the calculating of High-Order Pseudo random code sequence is consuming time to be reduced greatly, and test result is accurate.
Description
Technical field
The present invention relates to communication system, be specifically related to the measurement of error code method synchronous based on pseudo-random code sequence for communication system.
Background technology
Pseudo noise code binary sequence (Pseudo random binary sequence, PRBS) owing to all more easily passing through linear feedback shift register (linear feedback shift register at transmitting terminal and receiving terminal, be called for short LFSR) produce suitable sequence, therefore widely use in communication system error rate test.Will carry out error code calculating at receiving terminal, the sequence code stream of receiving terminal needs and the code stream of transmitting terminal carries out bit synchronous, and after synchronously completing, receiving terminal Serial No. and transmitting terminal Stream digital sequence compare, and carry out Error detection and counting.
The traditional synchronous measurement of error code of the communication system based on pseudo-random code sequence method is as follows: first produce 2 at receiving terminal
n-1individual (n is the number of LFSR) sequence of digital bit A, then a bit of as seed of the transmitting terminal data B received is intercepted, traversal search in A also compares with seed, if the error rate of certain segment data in seed and A is less than certain Signal reception threshold value, then represent synchronous success, then the sequence of equal length in B and A is compared and count with error code.If can not find the situation that the error rate is less than certain Signal reception threshold value in A, then what intercept in B is lower a bit of as seed, traversal search seed in A equally, the like, until find the error rate to be less than certain Signal reception threshold value, namely till synchronous success.
Above-mentioned this method, when the exponent number of pseudo-random code sequence is higher or the error rate is larger, in seed, the mistake in judgment of several bit can cause amount of calculation to increase, and therefore, efficiency is low, consuming time many.
Summary of the invention
Technical problem to be solved by this invention solves the synchronous measurement of error code method of communication system based on pseudo-random code sequence, low, the consuming time many problems of efficiency.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is to provide a kind of measurement of error code method synchronous based on pseudo-random code sequence for communication system, comprises the following steps:
The one piece of data received by receiving terminal is loaded in linear feedback shift register LFSR as seed, generates the pseudo noise code reference number sequence corresponding with this segment data;
This segment data is carried out comparison one by one with each bit in corresponding pseudo noise code reference number sequence, obtains error code number and the error rate, the comparative result according to the Signal reception threshold value of the described error rate and setting obtains synchronized result.
In the above-mentioned methods, obtain synchronized result according to the comparative result of the Signal reception threshold value of the described error rate and setting to comprise the following steps:
The more described error rate and described Signal reception threshold value;
If the current error rate is less than described Signal reception threshold value, then described synchronized result is synchronous success; Otherwise described synchronized result is synchronous tentatively unsuccessful, continues following one piece of data and be loaded in LFSR as seed and recalculate second error rate, more described second error rate and described Signal reception threshold value again;
If described second error rate is less than described Signal reception threshold value, then described synchronized result is synchronous success; Otherwise described synchronized result is synchronously unsuccessful, terminates error code and calculate.
In the above-mentioned methods, described Signal reception threshold value is 0.4.
The present invention, the one piece of data received by receiving terminal is utilized to be loaded in LFSR as seed, generate the pseudo noise code reference number sequence corresponding with this segment data, again this segment data is carried out comparison one by one with each bit in corresponding pseudo noise code reference number sequence, obtain error code number and the error rate, thus acquisition synchronized result, because do not adopt the traversal search mechanism of inefficiency, so Error detection step is simple, speed is fast, the calculating of High-Order Pseudo random code sequence is consuming time to be reduced greatly, and test result is accurate.
Accompanying drawing explanation
Fig. 1 is with the exemplary plot of the data of receiving terminal for seed generation pseudo noise code Serial No. in the present invention;
Fig. 2 is the flow chart obtaining synchronized result in the present invention according to the comparative result of the Signal reception threshold value of the error rate and setting.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
The measurement of error code method synchronous based on pseudo-random code sequence for communication system provided by the invention, comprises the following steps:
As shown in Figure 1, the one piece of data received by receiving terminal is loaded in Fibonacci type LFSR (Fibonacci LFSR) as seed, generate the pseudo noise code reference number sequence corresponding with this segment data, wherein, do XOR in order between bit as tap (tap), the bit not as tap does shift operation;
This segment data is carried out comparison one by one with each bit in corresponding pseudo noise code reference number sequence, obtains error code number and the error rate, the comparative result according to the Signal reception threshold value of the described error rate and setting obtains synchronized result.
Comparative result according to the Signal reception threshold value of the error rate and setting obtains the flow process of synchronized result as shown in Figure 2, and concrete steps are as follows:
Setting signal receive threshold is 0.4;
The more above-mentioned error rate and Signal reception threshold value;
If the current error rate is less than Signal reception threshold value, then synchronized result is synchronous success; Otherwise, illustrate in seed to have a bit error code at least, synchronized result is synchronous tentatively unsuccessful, continues following one piece of data and is loaded in LFSR as seed, recalculate second error rate in the same way, again compare second error rate and Signal reception threshold value;
If second error rate is less than Signal reception threshold value, then synchronized result is synchronous success; Otherwise synchronized result is synchronously unsuccessful, terminates error code and calculate.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn the structural change made under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (3)
1., for the measurement of error code method synchronous based on pseudo-random code sequence of communication system, it is characterized in that, comprise the following steps:
The one piece of data received by receiving terminal is loaded in linear feedback shift register LFSR as seed, generate the pseudo noise code reference number sequence corresponding with this segment data, do XOR in order between bit as tap, the bit not as tap does shift operation;
This segment data is carried out comparison one by one with each bit in corresponding pseudo noise code reference number sequence, obtains error code number and the error rate, the comparative result according to the Signal reception threshold value of the described error rate and setting obtains synchronized result.
2. as claimed in claim 1 for the measurement of error code method synchronous based on pseudo-random code sequence of communication system, it is characterized in that, obtain synchronized result according to the comparative result of the Signal reception threshold value of the described error rate and setting and comprise the following steps:
A10, the more described error rate and described Signal reception threshold value;
If the current error rate of A20 is less than described Signal reception threshold value, then described synchronized result is synchronous success; Otherwise described synchronized result is synchronous tentatively unsuccessful, continues following one piece of data and be loaded in LFSR as seed and recalculate second error rate, more described second error rate and described Signal reception threshold value again;
If described second error rate of A30 is less than described Signal reception threshold value, then described synchronized result is synchronous success; Otherwise described synchronized result is synchronously unsuccessful, terminates error code and calculate.
3., as claimed in claim 2 for the measurement of error code method synchronous based on pseudo-random code sequence of communication system, it is characterized in that, described Signal reception threshold value is 0.4.
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| CN102970077A (en) * | 2012-12-13 | 2013-03-13 | 上海市共进通信技术有限公司 | Error rate testing device and method for circuit board integrated optical component system |
| CN105812021A (en) * | 2016-03-23 | 2016-07-27 | 中国电子科技集团公司第十研究所 | Method for carrying out fast and synchronous statistics on PN bit error ratios of data transmission device |
| CN108574512A (en) * | 2017-08-28 | 2018-09-25 | 中车株洲电力机车研究所有限公司 | A kind of pseudo-random sequence catching method and device |
| CN108737038A (en) * | 2018-05-14 | 2018-11-02 | 西京学院 | Communicate error code device |
| CN109787723B (en) * | 2019-01-04 | 2021-08-24 | 武汉邮电科学研究院有限公司 | Detection method and detection system for bit error rate and high-order modulation communication system |
| WO2020177868A1 (en) * | 2019-03-07 | 2020-09-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and apparatus for operating a constrained device |
| CN110321102B (en) * | 2019-05-09 | 2021-06-18 | 苏州浪潮智能科技有限公司 | PRBS code pattern determining method, system, electronic device and storage medium |
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| CN101489241A (en) * | 2009-01-13 | 2009-07-22 | 中兴通讯股份有限公司 | Apparatus and method for detecting multimedia signal receiving performance of mobile terminal |
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