Multipath detection for received SPS signal

摘要

The subject matter disclosed herein relates to detecting and/or estimating multipath signals. For an example, a signal comprising at least one binary offset carrier (BOC) modulation signal is received. The BOC modulation signal is modulated with a pseudorandom noise sequence comprising a plurality of chips, wherein each of said chips has a set interval. In another aspect, the received signal is correlated with portions of the plurality of chips to provide a power signal. The portions of chips are less than the set interval. In a further aspect, presence of a multi-path signal in the received signal is detected. The detection of multipath is based, at least in part, on one or more characteristics of the power signal.

主权项

1. A method for multipath detection performed at a subscriber station, the method comprising:
receiving a signal comprising at least one binary offset carrier (BOC) modulation signal, said at least one BOC modulation signal being modulated with a pseudorandom noise sequence comprising a plurality of chips, each chip of said plurality of chips having a chip period; autocorrelating said received signal to provide a power signal, said autocorrelating comprising:
determining the power signal for a first portion of each chip of said plurality of chips; andexcluding a second portion of each chip of said plurality of chips from the power signal determination, said first portion of each chip and said second portion of each chip being different ones of either a first half of the chip period or a second half of the chip period; and detecting a presence of a multipath signal in said received signal based, at least in part, on one or more characteristics of said power signal.