大气激光通信系统中GF(17)域RS码研究

摘要

Low-pulse position modulation (L-PPM) modulation technique is widely used in atmospheric laser communication. In order to correspond to L-PPM modulation technique better and improve correction ability, channel coding employs error correcting code over finite field GF(q). After discussing RS encoding and decoding algorithms over GF( 17 ), and studying the RS(16,10) encoding and decoding algorithms and its realization process, results show that RS(16,10) code over GF(17) can correct 2-bit random errors after channel interference when transmitter employs 16-PPM modulation mode.%低脉冲位置调制是大气激光通信领域广泛采用的调制方式,为了更好地与低脉冲位置调制映射,提高通信系统的检错和纠错能力,在此通信系统中的信道编码采用基于有限域GF(q)上的纠错码,论述了GF(17)域RS码的编译码箅法和研究RS(16,10)的编译码算法及其实现过程.结果表明,采用16脉冲位置调制方式在信道受到干扰后,基于GF(17)域的RS(16,10)码可以在接收端纠正两位随机错误.