论文部分内容阅读
提出了一种应用于TD-SCDMA系统中的快速频率估计算法。这种算法利用训练序列估计信道冲击响应,恢复不受信道干扰的发送信号;然后利用最大似然估计算法和二分数值估计算法,估计出较为准确的频率偏移值。仿真表明,该算法比常用的频率估计算法具有更低的复杂度,而且在高斯白噪(AWGN)和多径衰落环境下,均能够对TD-SCDMA系统中的频率偏移获得较为准确的估计结果。
A fast frequency estimation algorithm for TD-SCDMA system is proposed. This algorithm uses the training sequence to estimate the channel impulse response and recover the signal that is not disturbed by the channel. Then, the maximum likelihood estimation algorithm and the binary fraction estimation algorithm are used to estimate the accurate frequency offset. The simulation results show that the proposed algorithm has lower complexity than the commonly used frequency estimation algorithms and can obtain a more accurate estimation of the frequency offset in TD-SCDMA systems under Gaussian white noise (AWGN) and multipath fading result.