Receiver including synch pulse detection and associated method
First Claim
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1. A receiver comprising:
- a matched filter being matched to a synch pulse and generating a matched filter output signal comprising a plurality of peaks and valleys with one of the peaks corresponding to the synch pulse;
an orthogonal filter being inversely matched to the synch pulse and generating an orthogonal filter output signal comprising a plurality of peaks and valleys with one of the valleys corresponding to the synch pulse; and
a detector for determining the synch pulse based upon the matched filter output signal and the orthogonal filter output signal.
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Abstract
A receiver includes a matched filter matched to a synch pulse and generates a matched filter output signal having peaks and valleys with one of the peaks corresponding to the synch pulse. An orthogonal filter is inversely matched to the synch pulse and generates an orthogonal filter output signal having peaks and valleys with one of the valleys corresponding to the synch pulse. A detector determines the synch pulse based upon a largest difference between the matched filter output signal and the orthogonal filter output signal.
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Citations
23 Claims
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1. A receiver comprising:
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a matched filter being matched to a synch pulse and generating a matched filter output signal comprising a plurality of peaks and valleys with one of the peaks corresponding to the synch pulse;
an orthogonal filter being inversely matched to the synch pulse and generating an orthogonal filter output signal comprising a plurality of peaks and valleys with one of the valleys corresponding to the synch pulse; and
a detector for determining the synch pulse based upon the matched filter output signal and the orthogonal filter output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A receiver comprising:
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an input for receiving an input signal comprising a plurality of data pulses and a plurality of synch pulses;
a matched filter coupled to the input and being matched to the plurality of synch pulses and generating a plurality of matched filter output signals, at least one of the matched filter output signals comprising a plurality of peaks and valleys with one of the peaks corresponding to one of the synch pulses;
a constant false alarm rate (CFAR) detector coupled to an output of said matched filter for comparing each matched filter output signal to a noise threshold so that data pulses exceeding the noise threshold are removed;
an orthogonal filter coupled to the input and being inversely matched to the plurality of synch pulses and generating a plurality of orthogonal filter output signals, at least one of the orthogonal filter output signals comprising a plurality of peaks and valleys with one of the valleys corresponding to one of the synch pulses; and
a detector coupled to an output of said CFAR detector and to an output of said orthogonal filter for determining the plurality of synch pulses based upon the respective matched and orthogonal filter output signals. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method for detecting a synch pulse in a receiver comprising a matched filter matched to the synch pulse and an orthogonal filter inversely matched to the synch pulse, the method comprising:
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generating a matched filter output signal comprising a plurality of peaks and valleys with one of the peaks corresponding to the synch pulse;
generating an orthogonal filter output signal comprising a plurality of peaks and valleys with one of the valleys corresponding to the synch pulse; and
determining the synch pulse based upon the matched filter output signal and the orthogonal filter output signal. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification