Channel estimation by searching over channel response candidates having dominant components
First Claim
1. A method, comprising:
- generating in a receiver one or more candidate sample-sequences, wherein each candidate sample-sequence corresponds to a respective channel-multipath candidate that comprises a respective combination of up to a predefined number of path delays, and wherein each candidate sample-sequence comprises one or more copies of a predefined sampled pulse-shape that are positioned at the path delays of the corresponding channel-multipath candidate;
receiving in the receiver a signal that traversed a multipath channel having a channel response, so as to produce a received sequence of samples that are indicative of the channel response;
estimating the channel response by the receiver, by selecting the candidate sample-sequence that best matches the received sequence.
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Abstract
A method in a receiver includes receiving a signal that traversed a multipath channel having a channel response, so as to produce a received sequence of samples that are indicative of the channel response. Using a predefined similarity measure, multiple metrics between the received sequence of samples and multiple respective candidate sequences of samples are calculated by the receiver. Each candidate sequence includes a combination of one or more dominant signal components having respective sample delays, and each candidate sequence corresponds to a channel multipath candidate that has one or more channel paths at the respective sample delays. The channel response is estimated by the receiver, by selecting the candidate sequence that best matches the received sequence, the selecting being based on the similarity measure.
41 Citations
22 Claims
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1. A method, comprising:
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generating in a receiver one or more candidate sample-sequences, wherein each candidate sample-sequence corresponds to a respective channel-multipath candidate that comprises a respective combination of up to a predefined number of path delays, and wherein each candidate sample-sequence comprises one or more copies of a predefined sampled pulse-shape that are positioned at the path delays of the corresponding channel-multipath candidate; receiving in the receiver a signal that traversed a multipath channel having a channel response, so as to produce a received sequence of samples that are indicative of the channel response; estimating the channel response by the receiver, by selecting the candidate sample-sequence that best matches the received sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for channel estimation, comprising:
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an interface, which is configured to receive a signal that traversed a multipath channel having a channel response, so as to produce a received sequence of samples that are indicative of the channel response; and processing circuitry, which is configured to generate one or more candidate sample-sequences, wherein each candidate sample-sequence corresponds to a respective channel-multipath candidate that comprises a respective combination of up to a predefined number of path delays, and wherein each candidate sample-sequence comprises one or more copies of a predefined sampled pulse-shape that are positioned at the path delays of the corresponding channel-multipath candidate, and, to estimate the channel response by selecting the candidate sample-sequence that best matches the received sequence. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification