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针对直接序列扩频超宽带通信系统中前端电路复杂度较高的问题,设计了一种新的简化RAKE接收机。这种接收机避免在前端接收电路上对每径信号进行的模拟相关运算,将脉冲信号通过接收机做相关运算变换到低频信号之后进行数字处理,从而降低前端电路的硬件规模。论文对简化RAKE接收机的误码率性能进行了理论分析和仿真,结果表明在误码率性能相近情况下,这种简化RAKE接收机的前端硬件规模为传统RAKE接收机的1/16。
Aiming at the high complexity of front-end circuit in direct sequence spread spectrum ultra-wideband communication system, a new simplified RAKE receiver is designed. This receiver avoids the analog correlation operation of each signal on the front-end receiving circuit. After the pulse signal is converted into the low-frequency signal by the receiver, the receiver performs digital processing to reduce the hardware size of the front-end circuit. The paper analyzes and simulates the bit error rate performance of a simplified RAKE receiver. The results show that the front-end hardware size of the simplified RAKE receiver is 1/16 of that of a conventional RAKE receiver with similar bit error rate performance.