Reduced frequency data processing using a matched filter set front end
First Claim
1. A reduced clock rate data decoding circuit, the circuit comprising:
- a matched filter bank, wherein the matched filter bank receives a series of symbols at a rate corresponding to a sample clock, wherein the matched filter bank includes a first matched filter and a second matched filter, wherein the first matched filter is tuned to detect a first bit sequence in the series of symbols and to assert a first symbol proxy upon detection of the first bit sequence, and wherein the second matched filter is tuned to detect a second bit sequence in the series of symbols and to assert a second symbol proxy upon detection of the second bit sequence; and
a detector circuit, wherein the detector circuit processes a series of symbol proxies including the first symbol proxy and the second symbol proxy at a rate corresponding to a reduced rate clock, wherein the reduced rate clock is the sample clock divided by a factor.
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Abstract
Various embodiments of the present invention provide systems and methods for reduced clock rate data processing. As an example, a circuit is disclosed that includes a matched filter bank that receives a series of symbols at a rate corresponding to a sample clock. The matched filter bank includes a first matched filter tuned to detect a first bit sequence in the series of symbols and to assert a first symbol proxy upon detection of the first bit sequence, and a second matched filter tuned to detect a second bit sequence in the series of symbols and to assert a second symbol proxy upon detection of the second bit sequence. The circuit further includes a detector circuit that processes a series of symbol proxies including the first symbol proxy and the second symbol proxy at a rate corresponding to a reduced rate clock. The reduced rate clock is the sample clock divided by a factor.
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Citations
20 Claims
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1. A reduced clock rate data decoding circuit, the circuit comprising:
- a matched filter bank, wherein the matched filter bank receives a series of symbols at a rate corresponding to a sample clock, wherein the matched filter bank includes a first matched filter and a second matched filter, wherein the first matched filter is tuned to detect a first bit sequence in the series of symbols and to assert a first symbol proxy upon detection of the first bit sequence, and wherein the second matched filter is tuned to detect a second bit sequence in the series of symbols and to assert a second symbol proxy upon detection of the second bit sequence; and
a detector circuit, wherein the detector circuit processes a series of symbol proxies including the first symbol proxy and the second symbol proxy at a rate corresponding to a reduced rate clock, wherein the reduced rate clock is the sample clock divided by a factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a matched filter bank, wherein the matched filter bank receives a series of symbols at a rate corresponding to a sample clock, wherein the matched filter bank includes a first matched filter and a second matched filter, wherein the first matched filter is tuned to detect a first bit sequence in the series of symbols and to assert a first symbol proxy upon detection of the first bit sequence, and wherein the second matched filter is tuned to detect a second bit sequence in the series of symbols and to assert a second symbol proxy upon detection of the second bit sequence; and
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11. A method for data detection using a reduced rate clock, the method comprising:
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receiving a series of symbols at a rate corresponding to an input clock; filtering the series of symbols in parallel through a first matched filter, a second matched filter, a third matched filter and a fourth matched filter; and
wherein the first matched filter is tuned to detect a first bit sequence in the series of symbols and to assert a first symbol proxy upon detection of the first bit sequence, the second matched filter is tuned to detect a second bit sequence in the series of symbols and to assert a second symbol proxy upon detection of the second bit sequence, the third matched filter is tuned to detect a third bit sequence in the series of symbols and to assert a third symbol proxy upon detection of the third bit sequence, and the fourth matched filter is tuned to detect a fourth bit sequence in the series of symbols and to assert a fourth symbol proxy upon detection of the fourth bit sequence; andperforming a data detection on a series of symbol proxies including the first symbol proxy, the second symbol proxy, the third symbol proxy and the fourth symbol proxy at a rate corresponding to the input clock divided by a factor. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A communication system including a receiver with a reduced rate data detector, the system comprising:
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a receiver, wherein the receiver includes; an analog to digital converter, wherein the analog to digital converter is operable to receive an analog signal and to generate a series of digital samples representing the analog signal at a rate corresponding to an input clock; a matched filter bank, wherein the matched filter bank is operable to receive a series of symbols derived from the series of digital samples and to filter the received series of symbols through a first matched filter tuned to detect a first bit sequence in the series of symbols and to assert a first symbol proxy upon detection of the first bit sequence, a second matched filter tuned to detect a second bit sequence in the series of symbols and to assert a second symbol proxy upon detection of the second bit sequence, a third matched filter tuned to detect a third bit sequence in the series of symbols and to assert a third symbol proxy upon detection of the third bit sequence, and a fourth matched filter tuned to detect a fourth bit sequence in the series of symbols and to assert a fourth symbol proxy upon detection of the fourth bit sequence; and a detector, wherein the detector is operable to process a series of symbol proxies including the first symbol proxy, the second symbol proxy, the third symbol proxy and the fourth symbol proxy at a rate corresponding to the input clock divided by a factor. - View Dependent Claims (18, 19, 20)
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Specification