Method and receiver for receiving a composite signal

摘要

A data processor selects a set of BOC correlations in accordance with a BOC correlation function for the sampling period if the primary amplitude exceeds or equals the secondary amplitude for the sampling period. An electronic data processor determines whether the receiver is operating in a steady-state mode by evaluating the detected primary amplitude. The data processor selects and/or processes a set of BOC correlations for the sampling period to track a carrier of the received composite signal if the receiver is operating in the steady-state mode. In one embodiment, the data processor forms a first code error using the selected BOC correlations with a first chip spacing to drive the code tracking.

主权项

1. A method for receiving a received composite signal, the method comprising:
receiving a composite signal, comprising binary offset carrier (BOC) modulated signals, to extract a BOC component by combining with a local BOC replica, and to derive a quadrature BOC (QBOC) component by combining with a local QBOC replica, the BOC component comprising an in-phase BOC component and a quadrature-phase BOC component, the QBOC component comprising in-phase QBOC component and a quadrature-phase QBOC component; detecting a primary amplitude of the BOC component; determining that a satellite receiver is operating in a steady-state mode by evaluating the detected primary amplitude; selecting a set of BOC correlations for a current sampling period if the satellite receiver is operating in the steady-state mode; processing the selected BOC correlations during the sampling period to track a carrier of the received composite signal; forming a first code error using the selected BOC correlations with a first chip spacing to drive code tracking; and estimating a range between a receiver antenna and a satellite transmitter that transmits the received composite signal.