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Method for a time domain channel estimator for communication signals

IP.com Disclosure Number: IPCOM000124312D
Publication Date: 2005-Apr-15
Document File: 2 page(s) / 47K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for a time domain channel estimator for communication signals. Benefits include improved functionality and improved performance.

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Method for a time domain channel estimator for communication signals

Disclosed is a method for a time domain channel estimator for communication signals. Benefits include improved functionality and improved performance.

General description

              The disclosed method is an algorithm for estimating the impulse response of a fading channel by processing a known sequence of the transmitted signal. The sequence might be the preamble attached to the data packets. The estimation of the channel is a critical step in the receiving chain and is essential for achieving high performance at the receiver. The disclosed method provides an extremely efficient and easy to implement algorithm for this estimation.

Advantages

Improved estimation of channel-impulse-response, due to minimizing the effect of noise.

Detailed description

              The disclosed method includes an algorithm for estimating the impulse response of a fading channel. After accomplishing signal acquisition and time synchronization, the data is parsed into symbols. The demodulator provides a hypothesis for each symbol. The hypothesis is taken out of a known set of optional preamble symbols. Each symbol is fed to the channel-coefficients extractor, simultaneously with it’s a convolution matrix based on the appropriate hypotheses.

              The channel-coefficients extractor can be implemented by a finite-impulse-response filter, or directly by matrix multiplication. The tap values of the filter are derived from the...