Receiver for recovering data from an OFDM symbol

Details Receiver for recovering data from an OFDM symbol Receiver for recovering data from an OFDM symbol

2005-03-24

2008-10-21

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S346000, C375S350000

Reexamination Certificate

active

07440506

ABSTRACT:
A receiver for recovering data from a received symbol of signal samples generated in accordance with Orthogonal Frequency Division Multiplexing (OFDM), the OFDM symbol including pilot carrier signals, the receiver including a pilot assisted channel estimator comprising a pilot extractor configured to extract the pilot carrier signals from the signal samples, and to generate an estimate of a sample of a channel frequency response for each of the pilot carrier signals in the received OFDM symbol, by comparing the extracted pilot carrier signals with predetermined versions of the pilot carrier signals, and a frequency interpolation filter configured to interpolate the samples of the channel frequency response estimate, and a filter controller, the frequency response of the frequency interpolation filter including a pass bandwidth which is adjustable, and the filter controller configured to adjust the bandwidth of the frequency interpolation filter to reduce noise in the estimate of channel frequency response.

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