空军工程大学学报（自然科学版）2011，Vol.12Issue(5)：72-75,4.DOI:10.3969/j.issn.1009-3516.2011.05.015
基于Cordic算法的载波同步方法
Carrier Synchronization Method Based on Cordic Algorithm
摘要
Abstract
In communication system, frequency warp is often caused by the coherent detection or the synchronous demodulation. Because in one frame the sample time of each code is different from that of other codes, the phase error of the demodulated code and the decoding error would become larger and larger as time goes on. A carrier synchronization method, in which the Cordic algorithm and the efficacious LDPC decoding performance are adopted , is presented to solve the frequency warp. According to this algorithm, the frequency warp is figured out by u-sing the Cordic algorithm, and then the phase error caused by the frequency warp in each receiving code is modified by using the Cordic algorithm again. Finally, the modified code is delivered to the decoder based on the LDPC decoding algorithm. Simulation results show that by using this method not only the multiplicative manipulation is substituted for the shift manipulation, but also the algorithm's performance is approaching to the precise synchronous performance.关键词
低密度奇偶校验码/Cordic算法/置信传播译码算法/载波同步Key words
lowdensity parity - check codes/ the Cordic algorithm/ belief propagation/ carrier synchronization分类
电子信息工程引用本文复制引用
李小蓓,杨学兵,蒋华,孙璐,蒲浩,黄涛,吕晨..基于Cordic算法的载波同步方法[J].空军工程大学学报（自然科学版）,2011,12(5):72-75,4.基金项目
空军工程大学电讯工程学院博士启动基金资助项目(KDYBSQDJJ1008) （KDYBSQDJJ1008）
