摘要
简要介绍了扩频通信信号的检测和参数估计的一般方法以及这些方法的优缺点。这些方法在用于218长码扩频信号检测时,由于数据和计算量很大,在工程上很难实现。详细分析了快速搜索相关累积检测方法的基本原理,并且在工程上利用该算法,通过FPGA硬件处理平台实现过程控制及相关搜索累积计算,完成了218长码DS信号的检测和参数估计,该方法也可用于其他码长扩频信号的侦察处理。
The general methods for detecting spread speetrum signal and estimating its parameters, with their merits and demerits, are briefly discussed in this paper. In the detection of 2^18 long code spread spectrum signal, these methods are difficult to realize in engineering due to the magnitude of data and calculation. The basic principle of a new detection method, namely fast searching and correlation cumulating, is discussed in detail. This method has been successfully applied in practice, realizing process control and calculation of correlation cumulating in the FPGA hardware platform, and completing the detection and parameters-estimation of 2^18 long code DS signals. This method can be also used in the of other DS signals with different length codes.
出处
《无线电工程》
2006年第5期27-29,共3页
Radio Engineering
关键词
直接序列
扩频
相关检测
信号识别
参数估计
direct sequence
spread spectrmn
correlation detection
signal recognition parameter estimation
