A joint rotational periodogram averaging and demodulation soft information carrier synchronization algorithm

作者：Sun Jin Hua^*; Liu Peng; Wu Xiao Jun

来源：Journal of Electronics and Information Technology, 2013, 35(9): 2200-2205.

DOI：10.3724/SP.J.1146.2012.01576

• Carrier estimation
• Periodograms
• Soft information
• Soft output
• Wireless communications

For the carrier synchronization in short burst communication system, a joint Rotational Periodogram Averaging (RPA) and demodulation soft information carrier estimation algorithm is proposed. First, the pilot sequence is rotated with different frequency offsets, and the coarse carrier estimation is carried out with periodogram averaging method. Then, further fine estimation is done by stepwise search. The precise carrier synchronization parameters are obtained based on the criterion of Maximum-Mean-Square Soft Output (M2S2O). Simulation results show that the proposed algorithm with short pilots and lower complexity can achieve a BER performance which is very near that of the optimal coherent demodulation and eliminate large carrier offsets as much as plus and minus half of the data rate. When Bit Error Rate (BER) is in the region of 10-2 ~ 10-4, the Signal-to-Noise Ratio (SNR) degradation is within 0.3 dB.

• 出版日期2013
• 单位西安电子科技大学