CAJ | 학술논문

为改善卫星移动通信系统的短突发帧结构的信道估计性能，分析卫星移动通信链路结构，综合考虑卫星移动通信信道估计方法，提出了一种基于软判决反馈的信道估计方案。通过对基于训练序列信道估计的判决结果进行反编码，利用统计判决结果剔除偏差值较大项，进行信道软判决估计，其软硬件实现复杂度和处理延迟在可接受的范围内。仿真结果表明，该方案使卫星移动通信系统解调性能在低、高速莱斯信道下得到较大提高。
위개선위성이동통신계통적단돌발정결구적신도고계성능，분석위성이동통신련로결구，종합고필위성이동통신신도고계방법，제출료일충기우연판결반궤적신도고계방안。통과대기우훈련서렬신도고계적판결결과진행반편마，이용통계판결결과척제편차치교대항，진행신도연판결고계，기연경건실현복잡도화처리연지재가접수적범위내。방진결과표명，해방안사위성이동통신계통해조성능재저、고속래사신도하득도교대제고。
To improve the channel estimation performance of the short burst frame structure of the satellite mobile communica-tion system,the mobile satellite communication link structure was analyzed and the mobile satellite communication channel esti-mation method was comprehensively considered.A channel estimation scheme based on soft decision feedback was proposed. Through the decision outcome of the code based on the training sequence channel estimation,the reverse coding was done.Re-sults of statistical decision were used to rej ect big deviation,and soft decision estimation for channel was done.The hardware and software implementation complexity and the processing delay were in an acceptable range.The results of simulation show that the scheme demodulation performance of the mobile satellite communication system in the low-speed and high-speed Rice channel greatly increases.