Carrier frequency offset synchronization algorithm for short burst communication system

The problem of carrier frequency and phase synchronization exists in most wireless digital communication systems. These offsets are generally results from the Doppler effect, oscillator instabilities, and unknown transmission delays between receiver and transmitter. In this paper, we propose a joint synchronization algorithm applicable for short-burst PSK modulation systems. In the coarse estimation, the M&M estimator is utilized to guarantee wide estimation range nearly 45% of symbol rate. In order to improve the poor estimation accuracy of M&M estimator, we choose cross correlation with far spacing between two adjacent pilot blocks. The length of the pilot blocks and the spacing between pilot blocks are designed according to the requirement of bit error ratio(BER) performance loss and efficient spectrum utilization. Simulation results reveal that the proposed joint algorithm can correct very wide frequency offsets with performance near the ideal situation at limited pilot symbols.