短波瑞利衰落信道FH／MFSK编码系统的性能

短波瑞利衰落信道FH／MFSK编码系统的性能 PERFORMANCE ABOUT FH/MFSK CODE SYSTEM IN SHORT-WAVE RAYLEIGH FADING CHANNEL 甘良才 1 first-author 王振华 1 武汉大学空间物理与电子信息学系 武汉大学空间物理与电子信息学系 Department of Space Physice and Electronics information,Wuhan University Department of Space Physice and Electronics information,Wuhan University 基于ＳｔｕｂｅｒＧ．Ｌ．的系统模型，研究带反馈链路的选择式频率分集与编码ＦＨ／ＭＦＳＫ系统在具有加性白高斯噪声（ＡＷＧＮ）的瑞利衰落信道中的编码性能，给出了采用ＲＳ码、双－ｋ码、重发码时，编码前与编码后系统的码符差错概率与比特能量噪声比的关系曲线．研究结果表明：无编码时，单纯增加分集重数Ｌ对系统性能的改善并不是十分明显的，只有同时采用分集与编码技术，才能有效地改善系统的性能． Based on Stuber G. L. , model, this paper studies the performance of FH/MFSK system with feedback link using selectire .frequency diversity and coding in Rayleighfading channel with additive white Gaussian noise（AWGN）. The relationship between symbol error probability and bit energy-to-noise ratio （SNR） are given for RS codes,dual-k convolution codes, and repetition codes. The results indicate:it is not quite obvious for the improvement of system performance if we merely increases number L of diversity, only whenwe adopt both diversity and code technique at the same time, we are able to improve the system performance efficiently. 跳频 选择式频率分集 瑞利衰落 编码 frequency hopping selective frequency diversity Rayleigh fading coding TN911.22 国家自然科学基金(61672102) 1994-02-01 2021-04-01 2