直扩接收机基带迟早门跟踪环的简化设计

针对要求设计简化、资源有限的设备和系统 ,通过对直扩接收机基带迟早门跟踪环的性能分析 ,在扩频增益比较大时 ,提出了一种简化设计结构 ,用两个由扩频码的部分序列构成的相关器分别替代原来早门和迟门的完全序列相关器。仿真表明该结构在给定足够的相关值情况下 ,性能略有恶化 ,但资源却得到较大节约 ,设计可大大简化。

A Simplified Design of the Early-Late Gate Baseband Loop in a Direct Sequence Spread Spectrum Receiver

According to the devices and systems with the simple design and limited resources, a simplified structure is concerned when the sequence length is enough. It is concluded after the analyses of the early-late gate baseband loop in a direct sequence spread spectrum receiver. The structure is that the part-sequence correlators are used thread of the full-sequence correlators of the early gate and the late gate. The simulation results show that although the performance of the structure is decreased a little, its needed resources can be reduced greatly and the design can be simplified greatly, when the given correlation values are enough.