Method for quickly calculating G3-PLC interleaving parameters
A G3-PLC, fast calculation technology, applied in the direction of digital transmission system, electrical components, error prevention, etc., can solve problems such as lack, and achieve the effect of rapid acquisition and shortening of calculation time
Inactive Publication Date: 2020-04-07
苏州门海微电子科技有限公司
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Problems solved by technology
[0008] However, the prior art lacks a fast way to calculate m i , m j Methods
Method used
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[0028] Example: such as figure 1 As shown, a method for quickly calculating G3-PLC interleaving parameters is calculated by the following formula:
[0029] GCD(m i ,m)=GCD(m j ,m)=1;
[0030] Among them, GCD is the operation of taking the greatest common divisor, m i j i 、m j is the smallest positive integer that satisfies the above formula, and m i 、m j are greater than 2.
[0031] The above problem can also be described as a known positive integer m, and it is necessary to calculate the smallest positive integer m that is relatively prime to m and greater than 2 i , and the second smallest positive integer m greater than 2 that is relatively prime to m j .
[0032] By judging whether m can be divisible by p1~pk in turn (p1~pk is a prime number starting from 2), get m i 、m j The specific value of , where p1=2, p2=3, p3=5, p4=7, p5=11, p6=13, all are prime numbers;
[0033] Among them, m i 、m j The calculation steps are as follows:
[0034] S1. Determine whether...
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The invention discloses a method for quickly calculating G3-PLC interleaving parameters. The method comprises the following steps: judging whether m can be exactly divided by p1, p2, p3 and p4 or not;if m can be exactly divided, mi is equal to 11, and mj is equal to 13; if m cannot be exactly divided by the p4, judging whether m can be exactly divided by p5; if yes, mi is equal to 7, and mj is equal to 13; if not, mi is equal to 7, and mj is equal to 11; if the m cannot be exactly divided by the p3, judging whether the m can be exactly divided by the p4; if not, mi is equal to 5, and mj is equal to 7; if yes, judging whether the m can be exactly divided by p5 or not; if not, mi is equal to 5, and mj is equal to 11; if yes, mi is equal to 5, and mj is equal to 13; if the m cannot be exactly divided by the p2, judging whether the m can be exactly divided by the p3 or not; if not, mi is equal to 3 and mj is equal to 5; if yes, judging whether the m can be exactly divided by p4 or not; ifthe m cannot be exactly divided by p4, mi is equal to 3, and mj is equal to 7; if the m can be exactly divided by p4, mi is equal to 3, and mj is equal to 9; if the m cannot be exactly divided by p1,judging whether the m can be exactly divided by p2 or not; if not, mi is equal to 3 and mj is equal to 4; if yes, judging whether the m can be exactly divided by p3 or not; if not, mi is equal to 4 and mj is equal to 5; if yes, judging whether the m can be exactly divided by p4 or not; if not, mi is equal to 4, and mj is equal to 7; if yes, mi is equal to 4, and mj is equal to 8. According to themethod, the nature of prime numbers is utilized, and mi and mj can be obtained through rapid calculation.
Description
technical field [0001] The invention relates to the field of power carrier communication (PLC), in particular to a method for quickly calculating G3-PLC interleaving parameters. Background technique [0002] In modern communication systems, due to the influence of the actual physical environment, especially the power carrier environment, the transmitted information will be affected by various burst interferences, which will cause the information to be affected within a certain period of time or within a certain frequency band. pollute. Usually, the channel coding in the communication system mainly has a better error correction ability for noise interference with random characteristics, and the error correction ability for this sudden continuous period of time or a section of spectrum interference is relatively weak. Therefore, in view of the above situation, the interleaving method is introduced in the modern communication system, that is, through the physical channel envir...
Claims
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IPC IPC(8): H04L1/00H04B3/54
CPCH04B3/54H04L1/0071
Inventor 林雄鑫朱忠益
Owner 苏州门海微电子科技有限公司