A Joint Pilot and Demodulation Soft Information Carrier Synchronization for SOQPSK Signals
To solve the carrier recovery problem with large frequency offset in short burst communication systems using shaped-offset quadrature phase shift keying (SOQPSK), a joint pilot and demodulation soft information carrier synchronization algorithm is proposed. First, a coarse estimation based on a few short pilot sequence is carried out. Then, further fine search is done around the coarse estimation region. The precise carrier synchronization parameters are obtained based on the maximum-meansquare soft output of SOQPSK. Simulation results show that at Eb/Nv≥0dB the proposed algorithm caneliminate large carrier offsets as much as half the data rate, resist phase confusion and achieve effective carrier synchronization with only 30 pilot bits and low computation complexity, achieving a BER performance which is very near that of the optimal coherent demodulation. When BER is in the region of 10-2~10-5, SNR degradation is within 0.3dB.
SOQPSK pilot soft information synchronization
Sun Jinhua Zhu Jili Wu Xiaojun
State Key Laboratory of Integrated Service Networks Xidian University Xian, China Science and Techn State Key Laboratory of Integrated Service Networks Xidian University Xian, China School of Information Engineering Chang an University Xi an, China
国际会议
2012 5th Global Symposium on Millimeter-Waves(2012年第五届全球毫米波会议 GSMM 2012)
哈尔滨
英文
512-516
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）