扩频通信系统中扩频码并/串快速捕获的数字化实现

首先分析了数字匹配滤波器捕获法和滑动相关捕获法的工作原理和各自的优缺点，进而提出了一种新的扩频码捕获方法——并／串结合的快速捕获方法．对此方法的平均捕获时间同滑动相关法的平均捕获时间做了详细的比较和仿真验证，并给出了基于VHDL的并／串结合的快速捕获实现方案．实验结果表明，此扩频码并／串快速捕获法可编程性强，易于FPGA／CPLD芯片实现，为扩频通信系统快速码捕获的集成电路设计提出了新的思路。

Digital implement of spread spectrum code parallel-serial fast acquisition in spread spectrum system

The principles,advantages and disadvantages of digital matched filter and gliding correlation were analyzed at first. The principle of a parallel-serial fast acquisition spread spectrum system was brought forward, the average acquisition time of this method was compared with that of gliding correlation and verified with simulations , and a scheme for its implementation based on VHDL was presented. The results of experiments show that this method of parallel-serial fast acquisition is programmable, and is easily implemented in FPGA or CPLD. A new idea of integrated circuit design was presented for code fast acquisition spread spectrum system.