现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2013年
17期
89-92
,共4页
低密度奇偶校验码%Turbo均衡%软输入软输出%短波数据
低密度奇偶校驗碼%Turbo均衡%軟輸入軟輸齣%短波數據
저밀도기우교험마%Turbo균형%연수입연수출%단파수거
LDPC%Turbo equalization%Soft Input Soft Output%shortwave data
短波信道是典型的瑞利慢衰落信道，多径延迟、多普勒频移和选择性衰落均会对短波数据调制解调器产生严重影响，为了更好地利用短波信道来实现高性能数据传输，抵抗多种因素带来的传输误码问题，提出一种基于短交织LDPC编码和Turbo迭代均衡相结合的高性能调制解调技术，并通过算法推衍、波形设计、仿真验证等过程论证了算法适用性及波形合理性，具有很高实用价值，可在数字短波通信设备上推广应用。
短波信道是典型的瑞利慢衰落信道，多徑延遲、多普勒頻移和選擇性衰落均會對短波數據調製解調器產生嚴重影響，為瞭更好地利用短波信道來實現高性能數據傳輸，牴抗多種因素帶來的傳輸誤碼問題，提齣一種基于短交織LDPC編碼和Turbo迭代均衡相結閤的高性能調製解調技術，併通過算法推衍、波形設計、倣真驗證等過程論證瞭算法適用性及波形閤理性，具有很高實用價值，可在數字短波通信設備上推廣應用。
단파신도시전형적서리만쇠락신도，다경연지、다보륵빈이화선택성쇠락균회대단파수거조제해조기산생엄중영향，위료경호지이용단파신도래실현고성능수거전수，저항다충인소대래적전수오마문제，제출일충기우단교직LDPC편마화Turbo질대균형상결합적고성능조제해조기술，병통과산법추연、파형설계、방진험증등과정론증료산법괄용성급파형합이성，구유흔고실용개치，가재수자단파통신설비상추엄응용。
The shortwave channel is a typical Rayleigh slow fading channel. The performance of shortwave data modem can be seriously affected by multiple path delay,Doppler frequency shift and selective fading. In order to realize the high-perfor-mance data transfer by short wave channel,and avoid the transmitting bit errors caused by various factors,a high-performance modem technology is proposed,which is based on the combination of short interleaved LDPC encoder and Turbo iteration equaliza-tion. The feasibility of the algorithm and the rationality of the waveform are proved by equation derivation,waveform design and simulation. The results show that the proposed algorithm has high practical value,and can be applied to data shortwave commu-nication equipments.
