四川大学学报：工程科学版2012，Vol.44Issue(2)：135-142,8.
海面FH-OFDM系统联合同步和信道估计算法
Joint Synchronization and Channel Estimation Algorithm of FH-OFDM Systems Above Sea Surface
摘要
Abstract
In military frequency hopping orthogonal frequency division multiplexing（FH-OFDM） application above sea surface,a joint synchronization and channel estimation algorithm based on recursive least square was proposed to improve bit error rate（BER） performance of aircraft communication receiver under different sea conditions.Frequency hopping synchronization was completed by parallel detection.Inter-carrier interference（ICI） of baseband signal was compensated in time domain.With the help of proposed frequency hopping frame structure in slow time-varying channel,a cost function with linear error was formulated to estimate channel＇s impulse response（CIR）,carrier frequency offset（CFO） and sampling frequency offset（SFO）.Estimation of parameters＇ initial values was improved by new maximum likehood cost function.Balance expression among bandwidth efficiency,frequency hopping rate and subcarrier numbers was presented.Simulation results showed that the proposed algorithm has better estimation mean square error and BER performance than conventional algorithm under calm sea condition and rough sea condition.关键词
跳频/正交频分复用/同步/信道估计/误码率Key words
frequency hopping/orthogonal frequency division multiplexing(OFDM)/synchronization/channel estimation/bit error rate分类
信息技术与安全科学引用本文复制引用
程永茂,曲晖,蔡天一,孙迎丰..海面FH-OFDM系统联合同步和信道估计算法[J].四川大学学报：工程科学版,2012,44(2):135-142,8.基金项目
国防科技预研基金项目 （）
海军航空工程学院青年科研基金资助项目 （）
