Processing a noisy analogue signal
First Claim
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1. A method of correlating at least one noisy analogue signal, wherein the noisy signal is one of a plurality of signals obtained by a plurality of receivers, the method comprising:
- 1-bit quantising the noisy signal by 1-bit quantising each of in-phase and quadrature components of the noisy signal;
comparing the quantised signal with a quantised reference signal by comparing each of the quantised in-phase and quadrature components of the noisy signal with each of quantised in-phase and quadrature components of the reference signal, wherein the reference signal is a consensus signal obtained by combining data from the plurality of receivers andif the quantised in-phase components of the noisy signal and the reference signal are equal, incrementing or decrementing a first counter value in a first direction and, if not, incrementing or decrementing the first counter value in a second direction; and
if the quantised quadrature components of the noisy signal and the reference signal are equal, incrementing or decrementing the first counter value in the first direction and, if not, incrementing or decrementing the first counter value in the second direction; and
if the quantised in-phase component of the noisy signal and the quantised quadrature component of the reference signal are equal, incrementing or decrementing a second counter value in a first direction and, if not, incrementing or decrementing the second counter value in a second direction; and
if the quantised quadrature component of the noisy signal and the quantised in-phase component of the reference signal are equal, incrementing or decrementing the second counter value in the second direction and, if not, incrementing or decrementing the second counter value in the first direction.
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Abstract
A device is provided for correlating at least one noisy analog signal which is one of a plurality of signals obtained by a plurality of receivers. The device comprises a 1-bit quantization element to which the noisy signal is supplied; a comparator configured to compare the quantized signal with a reference signal which is a consensus signal obtained by averaging data from the plurality of receivers; and an up/down counter that is configured to be incremented by a subset of the comparison signal.
64 Citations
21 Claims
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1. A method of correlating at least one noisy analogue signal, wherein the noisy signal is one of a plurality of signals obtained by a plurality of receivers, the method comprising:
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1-bit quantising the noisy signal by 1-bit quantising each of in-phase and quadrature components of the noisy signal; comparing the quantised signal with a quantised reference signal by comparing each of the quantised in-phase and quadrature components of the noisy signal with each of quantised in-phase and quadrature components of the reference signal, wherein the reference signal is a consensus signal obtained by combining data from the plurality of receivers and if the quantised in-phase components of the noisy signal and the reference signal are equal, incrementing or decrementing a first counter value in a first direction and, if not, incrementing or decrementing the first counter value in a second direction; and if the quantised quadrature components of the noisy signal and the reference signal are equal, incrementing or decrementing the first counter value in the first direction and, if not, incrementing or decrementing the first counter value in the second direction; and if the quantised in-phase component of the noisy signal and the quantised quadrature component of the reference signal are equal, incrementing or decrementing a second counter value in a first direction and, if not, incrementing or decrementing the second counter value in a second direction; and if the quantised quadrature component of the noisy signal and the quantised in-phase component of the reference signal are equal, incrementing or decrementing the second counter value in the second direction and, if not, incrementing or decrementing the second counter value in the first direction. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A device for correlating at least one noisy analogue signal, wherein the noisy signal is one of a plurality of signals obtained by a plurality of receivers, the device comprising:
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a 1-bit quantisation to which is supplied, in use, the noisy signal, wherein the 1-bit quantisation element is configured to 1-bit quantise each of in-phase and quadrature components of the noisy signal; a comparator configured to compare the quantised signal with a reference signal to generate a comparison signal, wherein the comparator is configured to compare each of the quantised in-phase and quadrature components of the noisy signal, with each of quantised in-phase and quadrature components of the reference signal, wherein the reference signal is a consensus signal obtained by combining data from the plurality of receivers; and first and second counters that are each configured to be incremented or decremented by at least some of the comparison signal, wherein; if the quantised in-phase components of the noisy signal and the reference signal are equal, the first counter is configured to be incremented or decremented in a first direction and, if not, the first counter is configured to be incremented or decremented in a second direction; and if the quantised quadrature components of the noisy signal and the reference signal are equal, the first counter is configured to be incremented or decremented in the first direction and, if not, the first counter is configured to be incremented or decremented in the second direction; if the quantised in-phase component of the noisy signal and the quantised quadrature component of the reference signal are equal, the second counter is configured to be incremented or decremented in a first direction and, if not, the second counter is configured to be incremented or decremented in a second direction; and if the quantised quadrature component of the noisy signal and the quantised in-phase component of the reference signal are equal, the second counter is configured to be incremented or decremented in the second direction and, if not, the second counter is configured to be incremented or decremented in the first direction. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of correlating at least one noisy analogue signal, wherein the noisy signal is one of a plurality of signals obtained by a plurality of receivers, the method comprising:
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1-bit quantising the noisy signal by 1-bit quantising each of in-phase and quadrature components of the noisy signal; 1-bit quantising a reference signal, wherein the reference signal is a consensus signal obtained by combining data from the plurality of receivers, comparing the quantised noisy signal with the quantised reference signal by comparing each of the quantised in-phase and quadrature components of the noisy signal with each of quantised in-phase and quadrature components of the reference signal, performing at least one of the following steps (a) and (b); (a) incrementing or decrementing a first counter value as follows; if the quantised in-phase components of the noisy signal and the reference signal are equal, incrementing or decrementing the first counter value in a first direction and, if not, incrementing or decrementing the first counter value in a second direction, and if the quantised quadrature components of the noisy signal and the reference signal are equal, incrementing or decrementing the first counter value in the first direction and, if not, incrementing or decrementing the first counter value in the second direction; (b) incrementing or decrementing a second counter value as follows; if the quantised in-phase component of the noisy signal and the quantised quadrature component of the reference signal are equal, incrementing or decrementing the second counter value in a first direction and, if not, incrementing or decrementing the second counter value in a second direction; and if the quantised quadrature component of the noisy signal and the quantised in-phase component of the reference signal are equal, incrementing or decrementing the second counter value in the second direction and, if not, incrementing or decrementing the second counter value in the first direction. - View Dependent Claims (19, 20, 21)
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Specification