IS-95码分多址系统上行信道接收机捕获单元的设计及FPGA实现

The Design and FPGA Realization of the Capture Unit in Uplink Channel Receiver of IS 95 CDMA Cellular System

捕获是扩频通信系统的关键技术之一，本文针对ＩＳ－９５码分多址蜂窝通信系统标准，给出了一种适合于上行信道接收机的捕获方案，分析了虚警概率和检测概率，并介绍了该方案的ＦＰ－ＧＡ实现。该方案简单可行，采用并行结构，具有捕获时间短，硬件资源消耗少的特点。

Capture is one of the key techniques in spread spectrum communication systems. The paper proposes a capture scheme suited for uplink channel receiver according to the standard of IS 95 CDMA cellular system. The false alarm and detection probabilities are analyzed, and the implementation by FPGA is introduced. Using parallel structure, this scheme is easy to realize and has shortened capture time and reduced consumption of hardware resource.