CAJ | 학술논문

针对突发通信和卫星测控通信中对于短帧长、高性能和低复杂度的需求,提出一种短帧长C2PM(coded continuous phase modulation)系统的优化设计方案,包括编码GMSK系统的优化设计及简化译码.对于编码GMSK系统,采用简化解调器、优化卷积码生成多项式和匹配交织器的方式,可实现系统参数优化.加性高斯白噪声(AWGN)信道下的仿真结果表明,系统性能优于常用卷积码性能,特别是在10-5误比特率时,略优于同帧长的Turbo码和LDPC码性能,且无误码平底出现.对编码GMSK系统复杂度的分析结果表明,该系统实现复杂度低于常用卷积码、同帧长Turbo码和LDPC码.
침대돌발통신화위성측공통신중대우단정장、고성능화저복잡도적수구,제출일충단정장C2PM(coded continuous phase modulation)계통적우화설계방안,포괄편마GMSK계통적우화설계급간화역마.대우편마GMSK계통,채용간화해조기、우화권적마생성다항식화필배교직기적방식,가실현계통삼수우화.가성고사백조성(AWGN)신도하적방진결과표명,계통성능우우상용권적마성능,특별시재10-5오비특솔시,략우우동정장적Turbo마화LDPC마성능,차무오마평저출현.대편마GMSK계통복잡도적분석결과표명,해계통실현복잡도저우상용권적마、동정장Turbo마화LDPC마.
Considering the demand of burst communications, optimization and simplified decoding for coded GMSK system in short frame was focused on to give an optimum proposal of C2PM system. Simplified demodulator, optimized generation polynomial of the convolution code and matched interleavers were discussed. Simulation results show that for coded GMSK system under AWGN, the performance is better than individual convolution code. Especially when BER is 1×10-5, it performs better than Turbo code and LDPC code with the same frame length, and there is no error floor occur-ring. Finally, complexity analysis shows that the coded GMSK system has lower implementation complexity in compari-son with the commonly used convolution code, Turbo code and LDPC code.