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Channel frequency response estimation and tracking for time- and frequency varying communication channels
Channel frequency response estimation and tracking for time- and frequency varying communication channels
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机译：随时间和频率变化的通信信道的信道频率响应估计和跟踪
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摘要
A channel frequency response estimator 120 for estimating the channel frequency response of a wireless RF channel having a time-varying channel frequency response, the channel frequency response estimator comprising- a wireless receiver 110 is configure to receive a wireless RF signal and obtaining therefrom a stream of received signals corresponding to a stream of information encoding symbols, the stream of information encoding symbols being encoded into the wireless RF signal by modulating at least the phase of a carrier signal,- an ambiguous channel frequency response estimator 130 configured to establish, from at least a first received signal of the stream of received signals, multiple channel frequency response estimate candidates for the channel frequency response of the channel during the transmission of the first received signal over the channel,- an ambiguity resolver 140 configured to select a channel frequency response estimate from the multiple channel frequency response estimate candidates that maximizes a goodness of fit of the selected first channel frequency response estimate, and at least two further channel frequency response estimates to a channel model, the channel model modeling the time-dependent variance of the channel frequency response, the at least two further channel frequency response estimates being estimates for the channel frequency response of the channel during transmission of at least two further received signals of the stream of received signals adjacent in time to the first received signal.
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