Signal derotating receiver
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United States of America Patent
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-
Dec 11, 2012
Grant Date -
Feb 12, 2004
app pub date -
Jan 10, 2003
filing date -
Jul 12, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A receiver, for example a receiver of broadcast digital terrestrial television signals modulated using COFDM (Coded Orthogonal Frequency Division Multiplexing), imposes a phase adjustment on a received signal. Phase adjustment may be effected, for example, by sample alignment of the signal, such as for cyclic prefix removal, or by shifting a window setting for a Fast Fourier Transform (FFT) processor. Before channel estimation or decoding is performed on the information stream, the information stream is derotated to compensate for the phase adjustment previously imposed on the received signal.
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