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US08170085B2 Multipath error estimation in satellite navigation receivers 有权
卫星导航接收机中的多径误差估计

Multipath error estimation in satellite navigation receivers
Abstract:
The invention presented in this disclosure gives methods to estimate and compensate for the multi-path in a typical navigational or spread spectrum receiver. The multi-path delay is estimated based on the outputs of different correlators of the receiver. Unlike three correlators normally used, the present disclosure uses five correlators, namely, Early2 (E2), Early1 (E1), Prompt (P), Late1 (L1) and Late2 (L2). The possible multi-path scenarios are classified into six different cases depending upon the reflected signal delay and the errors are computed. Further, the algorithm in the present disclosure can be extended to any correlators spacing.
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