多速率突发PSK信号全数字无前导字解调器  

A Full-digital Burst-mode PSK Demodulator without Preamble for Multiple Symbol Rates

作　　者：廖明[1,2] 姚军[2] 张伟[2] 王世练[3] 

机构地区：[1]中国工程物理研究院研究生部,四川绵阳621900 [2]中国工程物理研究院电子工程研究所,四川绵阳621900 [3]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《通信技术》2014年第1期18-23,共6页Communications Technology

摘　　要：突发模式通信应用日益广泛,基于前导字的解调算法降低了系统的数据传输效率。提出了一种适于多速率突发信号的全数字无前导字解调方案,通过FIFO操作和采样率转换适应多种速率的要求,参数估计、定时同步和载波恢复均采用前向算法,可以在不损失任何数据符号的条件下完成解调,具有较高的数据传输效率。算法易于硬件实现,给出了仿真和硬件测试的结果,结果显示在中高信噪比条件下算法具有较好的性能,验证了算法的有效性和可靠性。The application of burst-mode communication becomes even popular. The demodulator with pre- amble may reduce data transmission efficiency of the system. A scheme of full-digital burst-mode demod- ulator without preamble suitable for multiple symbol rates is proposed. FIFO operation and sampling rate conversion applicable to multiple symbol rates are designed. Feedforward algorithm is suggested for parameter estimation, timing synchronization and carrier recovery, the demodulation and high data transmission efficiency could be done without any loss of data symbols. The algorithm is easy to implement on hardware platform, and the results of simulation and hardware test indicate its effectiveness and reliability in the environment of moderate and high SNR.

关 键 词：多速率 突发模式 无前导字 

分 类 号：TN911.72[电子电信—通信与信息系统]