NOVEL ITERATIVE APPA CARRIER PHASE RECOVERY AND DETECTION FOR TURBO-CODED SYSTEMS
会议名称：《2009 IEEE International Conference on Communication Technology and Applications（ICCTA2009）》
会议日期：2009年
学科分类：07[理学] 08[工学] 070104[理学-应用数学] 081101[工学-控制理论与控制工程] 0701[理学-数学] 0811[工学-控制科学与工程]
关 键 词：turbo iteration carrier synchronization A priori probability aided(APPA) extrinsic information log-likelihood function(LLF)
摘 要：This paper introduced a novel a priori probability aided(APPA) carrier phase recovery and signal detection *** algorithm utilized the soft value of the extrinsic information generated by iterative MAP decoders by means of iteration after *** method provided robust carrier phase estimation along with reliable signal decoding with a wide range of phase errors at such low signal-to-noise ratio(SNR) conditions that turbo coded systems operate *** order to take full advantage of turbo iterative decoding structure and the output soft information,we improved turbo decoding iterative structure and proposed a novel turbo iterative scheme which include iterative calculation of both information and parity bits Log-likelihood Ratio(LLR).We applied the above iterative structure into APPA carrier *** with traditional turbo iteration methods,the novel turbo iteration algorithm can improve the acquisition region from -40 to 40 degrees while acquisition region is from -30 to 30 degrees in traditional methods at the same 3 iteration stage. The overall BER decreases greatly at the same number of turbo *** algorithm has additional advantages including reasonable hardware complexity and easy to be implemented.