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US 9,285,478 B2Granted
Multipath detection for received SPS signal
AssigneeQUALCOMM Incorporated
InventorRayman Wai Pon
Life of this patent
Estimating the term…
Abstract
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.
Claims52
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;
- and
- excluding 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.
4 more elements
A method for multipath detection performed at a subscriber station, the method, comprising:
- receiving a signal 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 first power signal, said autocorrelating to provide the first power signal comprising:
- determining the first power signal for a first portion of each chip of said plurality of chips;
- and
- excluding a second portion of each chip of said plurality of chips from the first power signal determination, said first portion of each chip of said plurality of chips comprising a first half of the chip period and said second portion of each chip of said plurality of chips comprising a second half of the chip period;
- autocorrelating said received signal to provide a second power signal, said autocorrelating to provide the second power signal comprising:
- determining the second power signal for the second portion of each chip of said plurality of chips;
- and
- excluding the first portion of each chip of said plurality of chips from the second power signal determination;
- combining the first power signal and the second power signal to generate a composite power signal;
- and
- detecting a presence of a multipath signal in said received signal based, at least in part, on one or more characteristics of said composite power signal.
9 more elements
A method for multipath detection performed at a subscriber station, the method comprising:
- receiving a signal modulated with a pseudorandom noise sequence comprising a plurality of chips, each chip of said plurality of chips having a chip period;
- applying a binary offset carrier (BOC) modulation to the received signal to provide a BOC modulated signal;
- autocorrelating said BOC modulated 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;
- and
- excluding 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.
5 more elements
An article for multipath detection performed at a subscriber station, the article comprising:
- a non-transient storage medium, said non-transient storage medium comprising machine-readable instructions stored thereon which, if executed by a computing platform, are adapted to cause said computing platform to:
- receive 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;
- autocorrelate said received signal to provide a power signal, said autocorrelation comprising a determination of the power signal for a first portion of each chip of said plurality of chips, the determination of the power signal excluding a second portion of each chip of said plurality of chips, said first portion of each chip and said second portion of each chip being different one of either a first half of the chip period or a second half of the chip period;
- and
- detect a presence of a multipath signal in said received signal based, at least in part, on one or more characteristics of said power signal.
2 more elements
An article for multipath detection performed at a subscriber station, the article comprising:
- a non-transient storage medium, said non-transient storage medium comprising machine-readable instructions stored thereon which, if executed by a computing platform, are adapted to cause said computing platform to:
- receive a signal modulated with a pseudorandom noise sequence comprising a plurality of chips, each chip of said plurality of chips having a chip period;
- autocorrelate said received signal to provide a first power signal, said autocorrelation to provide the first power signal comprising a determination of the first power signal for a first portion of each chip of said plurality of chips, the determination of the first power signal excluding a second portion of each chip of said plurality of chips, said first portion of each chip of said plurality of chips comprising a first half of the chip period and said second portion of each chip of said plurality of chips comprising a second half of the chip period;
- autocorrelate said received signal to provide a second power signal, said autocorrelation to provide the second power signal comprising a determination of the second power signal for the second portion of each chip of said plurality of chips, the determination of the second power signal excluding the first portion of each chip of said plurality of chips;
- combine the first power signal and the second power signal to generate a composite power signal;
- and
- detect a presence of a multipath signal in said received signal based, at least in part, on one or more characteristics of said composite power signal.
4 more elements
An article for multipath detection performed at a subscriber station, the article comprising:
- a non-transient storage medium, said non-transient storage medium comprising machine-readable instructions stored thereon which, if executed by a computing platform, are adapted to cause said computing platform to:
- receive a signal modulated with a pseudorandom noise sequence comprising a plurality of chips, each chip of said plurality of chips having a chip period;
- applying a binary offset carrier (BOC) modulation to the received signal to provide a BOC modulated signal;
- autocorrelate said BOC modulated signal to provide a power signal, said autocorrelation comprising a determination of the power signal for a first portion of each chip of said plurality of chips, the determination of the power signal excluding a second portion of each chip of said plurality of chips, 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
- detect a presence of a multipath signal in said received signal based, at least in part, on one or more characteristics of said power signal.
3 more elements
A subscriber station for multipath detection, the subscriber station comprising:
- a receiver to receive 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;
- and
- a correlator to autocorrelate said received signal to provide a power signal, said autocorrelation comprising a determination of the power signal for a first portion of each chip of said plurality of chips, the determination of the power signal excluding a second portion of each chip of said plurality of chips, 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;
- wherein said subscriber station is further adapted to detect a presence of a multipath signal in said received signal based, at least in part, on one or more characteristics of said power signal.
1 more element
A subscriber station for multipath detection, the subscriber station comprising:
- a receiver to receive a signal modulated with a pseudorandom noise sequence comprising a plurality of chips, each chip of said plurality of chips having a chip period;
- and
- a correlator configured to autocorrelate said received signal to provide a first power signal, said autocorrelation to provide the first power signal comprising a determination of the first power signal for a first portion of each chip of said plurality of chips, the determination of the first power signal excluding a second portion of each chip of said plurality of chips, said first portion of each chip of said plurality of chips comprising a first half of the chip period and said second portion of each chip of said plurality of chips comprising a second half of the chip period, the correlator further configured to autocorrelate said received signal to provide a second power signal, said autocorrelation to provide the second power signal comprising a determination of the second power signal for the second portion of each chip of said plurality of chips, the determination of the second power signal excluding the first portion of each chip of said plurality of chips;
- wherein said subscriber station is adapted to combine the first power signal and the second power signal to generate a composite power signal, and wherein said subscriber station is further adapted to detect a presence of a multipath signal in said received signal based, at least in part, on one or more characteristics of said composite power signal.
1 more element
A subscriber station for multipath detection, the subscriber station comprising:
- a receiver to receive a signal modulated with a pseudorandom noise sequence comprising a plurality of chips, each chip of said plurality of chips having a chip period;
- and
- a correlator to apply a binary offset carrier (BOC) modulation to the received signal to provide a BOC modulated signal and to autocorrelate said BOC modulated signal to provide a power signal, said autocorrelation comprising a determination of the power signal for a first portion of each chip of said plurality of chips, the determination of the power signal excluding a second portion of each chip of said plurality of chips, 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;
- wherein said subscriber station is adapted to detect a presence of a multipath signal in said received signal based, at least in part, on one or more characteristics of said power signal.
1 more element
A subscriber station for multipath detection, the subscriber station comprising:
- means for 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;
- means for 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;
- and
- excluding 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
- means for 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.
4 more elements
A subscriber station for multipath detection, the subscriber station comprising:
- means for receiving a signal modulated with a pseudorandom noise sequence comprising a plurality of chips, each chip of said plurality of chips having a chip period;
- means for autocorrelating said received signal to provide a first power signal, said autocorrelating to provide the first power signal comprising:
- determining the first power signal for a first portion of each chip of said plurality of chips;
- and
- excluding a second portion of each chip of said plurality of chips from the first power signal determination, said first portion of each chip of said plurality of chips comprising a first half of the chip period and said second portion of each chip of said plurality of chips comprising a second half of the chip period;
- means for autocorrelating said received signal to provide a second power signal, said autocorrelating to determine the second power signal comprising:
- determining the second power signal for the second portion of each chip of said plurality of chips;
- and
- excluding the first portion of each chip of said plurality of chips from the second power signal determination;
- means for combining the first power signal and the second power signal to generate a composite power signal;
- and
- means for detecting a presence of a multipath signal in said received signal based, at least in part, on one or more characteristics of said composite power signal.
9 more elements
A subscriber station for multipath detection, the subscriber station comprising:
- means for receiving a signal modulated with a pseudorandom noise sequence comprising a plurality of chips, each chip of said plurality of chips having a chip period;
- means for applying a binary offset carrier (BOC) modulation to the received signal to provide a BOC modulated signal;
- means for autocorrelating said BOC modulated 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;
- and
- excluding 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 chip period or a second half chip period;
- and
- means for 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.
5 more elements
A method for detection of a presence of a multipath signal in a received signal, the method comprising:
- receiving a signal 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 first power signal, said autocorrelating to provide the first power signal comprising:
- determining the first power signal for a first portion of each chip of said plurality of chips;
- and
- excluding a second portion of each chip of said plurality of chips from the first power signal determination, said first portion of each chip and said second portion of each chip each comprising a different portion of each chip and each having a duration less than said chip period, wherein said first portion and said second portion are non-overlapping;
- autocorrelating said received signal to provide a second power signal, said autocorrelating to provide the second power signal comprising:
- determining the second power signal for the second portion of each chip of said plurality of chips;
- and
- excluding the second portion of each chip of said plurality of chips from the second power signal determination;
- combining the first power signal and the second power signal to generate a composite power signal;
- and
- detecting the presence of the multipath signal in said received signal based on one or more characteristics of said composite power signal.
9 more elements
Dependencies are inferred from the claim text.