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本文简要叙述了直接序列扩频信号解扩的主要方法:逐比特解扩(bit-by-bitDe-Spread)和并行解扩(Parallel De-Spread)。指出:前一种方法要提取相干载波,并且难以实现快速同步。对于突发工作的直接序列扩频系统,并行解扩是比较切实可行的。我们用国内研制成功的声表面波声电卷积器,通过适当的信号设计完成了突发扩频信号的解扩。文章给出了有关实验结果。我们认为,这种方法,对不同调制方式的直接序列扩频信号解扩具有普遍适应性。
This article briefly describes the main methods of direct sequence spread spectrum signal despreading: bit-by-bitDe-Spread and Parallel De-Spread. Pointed out: The former method to extract the coherent carrier, and difficult to achieve rapid synchronization. For the sudden work of direct sequence spread spectrum systems, parallel despreading is more feasible. We use the successful development of the domestic SAW Acousto-Convector, through the appropriate signal design completed the spread of the spread spectrum signal despreading. The article gives the experimental results. In our opinion, this method has universal adaptability to the despreading of direct sequence spread spectrum signals of different modulation modes.