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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 is more and more widespread. The preamble-based demodulation algorithm reduces the data transmission efficiency of the system. A digital all-lead demodulation scheme suitable for multi-rate burst signals is proposed. Through FIFO operation and sampling rate conversion to adapt to various rate requirements, the forward algorithm is used for parameter estimation, timing synchronization and carrier recovery. Without any loss of data symbols under the conditions of complete demodulation, with high data transfer efficiency. The algorithm is easy to implement in hardware, and the simulation and hardware test results are given. The results show that the algorithm has good performance under medium-high SNR and the validity and reliability of the algorithm are verified.