On using transmission overhead efficiently for channel estimation in OFDM
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Date
2010
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE
Abstract
The limited time available for acquiring the channel state in mobile broadband wireless communication systems makes it crucial to count with channel estimation methods that attain the highest accuracy with a given preamble length. For the family of preambles that probe channels repeatedly at equispaced frequencies, we find that the shortest preamble that attains a given mean square error is a sequence that undersamples the channel spectrum, thereby allowing for a better mitigation of white Gaussian noise by averaging a higher number of observations.
Description
Keywords
Channel estimation, OFDM, Frequency estimation, Bandwidth, Broadband communication, Wireless communication, Probes, Interpolation, Payloads, AWGN