基于并行FFT的OFDM符号定时与整数倍频偏联合同步算法

提出了一种适用于OFDM系统的符号定时同步与整数倍载波频偏（相对于子载波间隔归一化）联合同步算法，它仅采用包含一个OFDM符号的前导码来实现准确的符号定时和整数倍载波频偏估计。联合同步算法采用并行FFT算法结构，能够并行地在时域和频域对接收OFDM信号中的前导码进行并行搜索，在完成定时同步的同时给出子载波频偏的整数倍估计。计算机仿真结果表明在高斯白噪声信道以及瑞利衰落信道下，该联合同步算法在定时同步的准确性、抗噪声性能以及载波频偏估计的范围上要明显优于现有算法，并且由于采用了时频二维并行同步结构，使得联合同步算法具有更快的同步收敛速度。

Novel Joint Timing Synchronization and Integer Frequency Estimation Algorithm for OFDM Systems

A robust and efficient technique for frame timing and integer carrier frequency estimation algorithm in OFDM systems is presented.It exploits a preamble consisting of one OFDM symbol with two identical parts to achieve accurate timing synchronization and integer carrier frequency offset estimation.The proposed method combines match filter and parallel FFT structure together,so the preamble codes in the received OFDM signal can be searched both in time domain and frequency domain,so the timing synchronizatio...