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US 8,619,919 B2Granted
Selective coherent and non-coherent demodulation methods and apparatuses
AssigneeQUALCOMM Incorporated
InventorsJie Wu, Douglas Neal Rowitch, Emilija M. Simic
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Abstract
Techniques are provided which may be implemented using various methods and/or apparatuses in a receiver of an electronic device to allow for a received signal to be demodulated using both coherent and non-coherent demodulation techniques and for selecting one of the demodulated data signals based, at least in part, on a drift rate measurement of a carrier frequency of the received signal.
Claims80
A method comprising:
- demodulating a received signal to extract a first data signal using a coherent demodulator;
- demodulating said received signal to extract a second data signal using a non-coherent demodulator;
- and
- selectively outputting either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal.
1 more element
A method comprising:
- demodulating a received signal to extract a first data signal using a coherent demodulator;
- demodulating said received signal to extract a second data signal using a non-coherent demodulator;
- selectively outputting either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal;
- and
- at least one of:
- in response, at least in part, to said drift rate measurement exceeding a drift rate threshold value, opening a loop in said coherent demodulator;
- or
- in response, at least in part, to said drift rate measurement not exceeding said drift rate threshold value, closing a loop in said coherent demodulator.
5 more elements
A method comprising:
- demodulating a received signal to extract a first data signal using a coherent demodulator;
- demodulating said received signal to extract a second data signal using a non-coherent demodulator;
- selectively outputting either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal, and a Carrier-to-Noise power ratio associated with said received signal.
A method comprising:
- demodulating a received signal to extract a first data signal using a coherent demodulator;
- demodulating said received signal to extract a second data signal using a non-coherent demodulator;
- identifying a word boundary associated with said first and second data signals to isolate first and second words in respective first and second data signals associated with a word epoch;
- and
- selectively outputting either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal, and a parity check against said first and second words.
2 more elements
A method comprising:
- demodulating a received signal to extract a first data signal using a coherent demodulator;
- demodulating said received signal to extract a second data signal using a non-coherent demodulator;
- identifying a word boundary associated with said first and second data signals to isolate first and second words in respective first and second data signals associated with a word epoch;
- and
- selectively outputting either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal;
- and
- identifying a measure of confidence that corresponds to said selectively output first or second words in said output first or second data signal.
4 more elements
An apparatus comprising:
- means for coherently demodulating a received signal to extract a first data signal;
- means for non-coherently demodulating said received signal to extract a second data signal;
- means for selectively outputting either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal.
An apparatus comprising:
- means for coherently demodulating a received signal to extract a first data signal;
- means for non-coherently demodulating said received signal to extract a second data signal;
- means for selectively outputting either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal;
- and
- at least one of:
- means for selectively opening a closed loop in said means for coherently demodulating said received signal, in response, at least in part, to said drift rate measurement exceeding a drift rate threshold value;
- and/or
- means for selectively closing an opened loop in said means for coherently demodulating said received signal, in response, at least in part, to said drift rate measurement not exceeding said drift rate threshold value.
5 more elements
An apparatus comprising:
- means for coherently demodulating a received signal to extract a first data signal;
- means for non-coherently demodulating said received signal to extract a second data signal;
- means for selectively outputting either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal, and a Carrier-to-Noise power ratio associated with said received signal.
An apparatus comprising:
- means for coherently demodulating a received signal to extract a first data signal;
- means for non-coherently demodulating said received signal to extract a second data signal;
- means for identifying a word boundary associated with said first and second data signals to isolate first and second words in respective first and second data signals associated with a word epoch;
- and
- means for selectively outputting either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal, and a parity check against said first and second words.
2 more elements
An apparatus comprising:
- means for coherently demodulating a received signal to extract a first data signal;
- means for non-coherently demodulating said received signal to extract a second data signal;
- means for identifying a word boundary associated with said first and second data signals to isolate first and second words in respective first and second data signals associated with a word epoch;
- means for selectively outputting either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal, and
- means for outputting information identifying a measure of confidence that corresponds to said selectively output first or second words in said output first or second data signal.
2 more elements
An apparatus comprising:
- a receiver to receive a signal;
- and
- a processing unit to obtain a first data signal extracted from said received signal using a coherent demodulator and a second data signal extracted from said received signal using a coherent demodulator, and selectively output either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal.
An apparatus comprising:
- a receiver to receive a signal;
- and
- a processing unit to:
- obtain a first data signal extracted from said received signal using a coherent demodulator and a second data signal extracted from said received signal using a coherent demodulator;
- and
- selectively output either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal, and a Carrier-to-Noise power ratio associated with said received signal.
3 more elements
An apparatus comprising:
- a receiver to receive a signal;
- and
- a processing unit to:
- obtain a first data signal extracted from said received signal using a coherent demodulator and a second data signal extracted from said received signal using a coherent demodulator;
- selectively output either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal;
- and
- at least one of:
- open a closed loop in said coherent demodulator in response, at least in part, to a determination that said drift rate measurement exceeds a drift rate threshold value;
- or
- close an opened loop in said coherent demodulator in response, at least in part, to a determination that said drift rate measurement does not exceed said drift rate threshold value.
7 more elements
An apparatus comprising:
- a receiver to receive a signal;
- and
- a processing unit to:
- obtain a first data signal extracted from said received signal using a coherent demodulator and a second data signal extracted from said received signal using a coherent demodulator;
- obtain a word boundary associated with said first and second data signals to isolate first and second words in respective first and second data signals associated with a word epoch;
- and
- selectively output either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal, and a parity check against said first and second words.
4 more elements
An apparatus comprising:
- a receiver to receive a signal;
- and
- a processing unit to:
- obtain a first data signal extracted from said received signal using a coherent demodulator and a second data signal extracted from said received signal using a coherent demodulator;
- obtain a word boundary associated with said first and second data signals to isolate first and second words in respective first and second data signals associated with a word epoch;
- selectively output either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal;
- and
- selectively output information identifying a measure of confidence that corresponds to said selectively output first or second words in said output first or second data signal.
5 more elements
An article comprising:
- a non-transitory computer readable medium having stored therein computer-implementable instructions executable by one or more processing units to:
- obtain a first data signal extracted from a received signal to using a coherent demodulator;
- obtain a second data signal extracted from said received signal to using a non-coherent demodulator;
- and
- select either said first data signal or said second data signal for further processing based, at least in part, on a drift rate measurement of a carrier frequency of said received signal.
2 more elements
An article comprising:
- a non-transitory computer readable medium having stored therein computer-implementable instructions executable by one or more processing units to:
- obtain a first data signal extracted from a received signal to using a coherent demodulator;
- obtain a second data signal extracted from said received signal to using a non-coherent demodulator;
- select either said first data signal or said second data signal for further processing based, at least in part, on a drift rate measurement of a carrier frequency of said received signal;
- and
- at least one of:
- in response, at least in part, to a determination that said drift rate measurement exceeds a drift rate threshold value, open a closed loop in said coherent demodulator;
- or
- in response, at least in part, to a determination that said drift rate measurement does not exceed said drift rate threshold value, close an opened loop in said coherent demodulator.
6 more elements
An article comprising:
- a non-transitory computer readable medium having stored therein computer-implementable instructions executable by one or more processing units to:
- obtain a first data signal extracted from a received signal to using a coherent demodulator;
- obtain a second data signal extracted from said received signal to using a non-coherent demodulator;
- and
- select either said first data signal or said second data signal based, at least in part, on a drift rate measurement of a carrier frequency of said received signal, and a Carrier-to-Noise power ratio associated with said received signal.
2 more elements
An article comprising:
- a non-transitory computer readable medium having stored therein computer-implementable instructions executable by one or more processing units to:
- obtain a first data signal extracted from a received signal to using a coherent demodulator;
- obtain a second data signal extracted from said received signal to using a non-coherent demodulator;
- obtain a word boundary associated with said first and second data signals to isolate first and second words in respective first and second data signals associated with a word epoch;
- select either said first data signal or said second data signal for further processing based, at least in part, on a drift rate measurement of a carrier frequency of said received signal;
- and
- establish information identifying a measure of confidence that corresponds to said selected first or second words in said selected first or second data signal.
4 more elements
Dependencies are inferred from the claim text.