一种复合伪随机码跟踪环路设计及误差分析

Design and Error Analysis for Composite Pseudo-noise Code Tracking Loop

该文针对当存在较大的载波相位跟踪误差时可能导致传统的复合码相干型跟踪环路失效的问题提出一种复合码非相干型跟踪环路。通过给出基于二进制偏移载波(BOC)调制的复合码的构造和相关特性分析,设计了具有非相干型鉴别器的跟踪环路,并分析了环路的跟踪误差。分析和仿真结果表明该环路解决了在存在较大载波相位误差时跟踪环路失效的问题,且具有良好的跟踪性能。

In accordance with the problem of failure tracking in coherent composite code tracking loop leaded by greater carrier phase tracking error, a non-coherent tracking loop is proposed in this paper. The methods of constructing composite Pseudo-Noise （PN） code sequences with Binary Offset Carriermodulation （BOC） modulation and the correlation properties are given. The non-coherent discriminator and the loop filter of the tracking loop and the analysis of the loop tracking performance are also presented. The analysis and simulation show that the design of PN code tracking loop can work effectively with the existence of the carrier phase tracking error and also gives a good tracking performance.