论文部分内容阅读
LPR 由一数字控制的直接序列最小移频键控扩频电台和用于分组交换的微处理器组合而成.在干扰环境中,可变码声表面波(SAW)匹配滤波器提供处理增益.相关递归积分增强同步性能,提供数据的同步检测且作为自适应多径累加器.采用卷积编码和序列译码的前向纠错含有两种突发码元率下的四种不同的编码率,微处理器完成网络的软件工作.本文给出了 LPR 的硬件设计和性能指标.
The LPR consists of a digitally controlled, direct sequence minimum frequency shift keying spread spectrum radio and a microprocessor for packet switching, in which variable gain SAW matched filters provide processing gain. Correlated recursive integrals enhance synchronization performance and provide simultaneous detection of data and as adaptive multipath accumulators Forward error correction using convolutional coding and sequence decoding consists of four different coding rates at two burst symbol rates , The microprocessor finishes the software work of the network.This text has given LPR hardware design and performance index.