一种高速移动数据突发通信中的频偏纠正方法

本文主要针对具有通信终端的运动速率很大、移动速率变化不规律特点的特殊突发数据通信系统的实现进行研究，提出了一种能够快速捕获频偏，并且进行突发数据的有效解算的方法。这种方法需要采用差分相位调制方式，并且应用很短的前导序列进行频偏估计，然后利用估计得到的频偏对突发包内的数据进行处理和解调判决以获得传输的数据。同时文中在这种方法的基础上引入了正交的第二支路进行并行处理和择优选取，可以进一步提高系统的稳定性和实用性。该算法克服了传统频偏纠正算法具有有限纠正范围的缺点，具有良好的通信性能，并且实现简单，捕获速度快，信息冗余度也较小。

A frequency offset correction method for high-speed burst data communication

The paper studies the special burst communication system with fast moving terminal and large speed change. A new frequency correction method used in this system is submitted here. The new method uses differential phase modulation and short pilot sequence to estimate the carrier frequency offset, and calculates the burst data based on the offset gotten. Based on the method submitted, a second orthogonal demodulation track is introduced to improve this method and get more stabilization. The new method overcomes the disadvantage that the frequency offset correction range of traditional methods is limited and small. The realization of new method is easy, the capture time of it is short, its information efficiency is great, and the communication performance of it is perfect too.