基于加权鉴别函数的二进制偏移载波信号跟踪方法

在移除二进制偏移载波（Binary Offset Carrier，BOC）信号跟踪模糊的同时，为了保持BOC信号高的码跟踪精度，提出基于加权鉴别函数（Weighted Discriminator Function，WDF）的BOC信号无模糊跟踪方法。WDF使用非相干超前减滞后功率（Noncoherent Early Minus Late Power，NELP）鉴别器和子载波相位消除（Sub Carrier Phase Cancellation technique，SCPC）鉴别器，生成无误锁点的鉴别函数实现BOC信号跟踪。针对BOC(10,5)信号，仿真结果表明，相比于SCPC、基于伪相关函数的无模糊延迟锁定环（Pseudo correlation function based Unambiguous Delay Lock Loop，PUDLL）方法和对称脉冲模糊移除（Symmetrical Pulse Ambiguity Removing，SPAR）方法，所提WDF方法在码跟踪误差方面分别改善了2.5dB、5.5dB与8.3dB，多径误差分别降为60.4%、32.8%与38.0%。因此，WDF是一种有效的、高性能的BOC信号无模糊跟踪方法。

Weighted discriminator function based tracking method forbinary offset carrier signals

To remove the ambiguitythreat and maintain the outstanding code tracking performance of binary off setcarrier (BOC) signals, an unambiguous tracking method based on weighted discriminator function (WDF) was developed.The WDF combined the noncoherent early minus late power (NELP) discriminatorwith the sub carrier phase cancellation technique (SCPC) discriminator to generate adiscriminator function without false lock points for BOC signal tracking. RegardingBOC (10,5) signal, the simulationresults show that compared with SCPC, pseudo correlation function based unambiguous delay lockloop (PUDLL) and symmetrical pulse ambiguity removing (SPAR) successively, the proposedWDF has2.5dB, 5.5dB and 8.3dB improvement in terms of code tracking error. Themultipath errors of WDF method are reduced to 60.4%, 32.8% and 38.0%, respectively. Therefore, the proposed WDFis an effective BOC signal unambiguous tracking method without standing performance.