Pulse or digital communications – Receivers
Reexamination Certificate
2007-12-04
2007-12-04
Ghayour, Mohammed (Department: 2611)
Pulse or digital communications
Receivers
Reexamination Certificate
active
11590388
ABSTRACT:
Characterizing channel response in a single upstream burst using redundant information from training tones (TTs). The invention is operable to utilize inserted TTs, contained within a transmitted data frame, to provide for an improved estimate of a communication channel's actual response and an improved estimate of the noise of the communication channel. The invention determines a maximum allowable delay spread of the many communication paths within a multi-path communication channel. Using the redundant TTs information then a portion of the finite impulse response of the communication channel, within the time domain, may be zeroed, thereby providing a much improved channel estimate and noise estimate. Using the redundant TTs, less noise is introduced onto the data tones (DTs) within a data frame. The present invention is also able to identify those portions of the TTs that are attributable to the actual channel and those that are attributable to the channel's noise.
REFERENCES:
patent: 6192026 (2001-02-01), Pollack et al.
patent: 6850481 (2005-02-01), Wu et al.
patent: 2003/0012308 (2003-01-01), Sampath et al.
patent: 2003/0099304 (2003-05-01), Gore et al.
Ayanoglu, Broadband Wireless Internet Forum white paper, “VOFDM Broadband Wireless Transmission and Its Advantages over single Carrier Modulation”, Dec. 15, 2000 pp. 1-35.
Ayanoglu, “Broadband Wireless Internet Forum presentation”, WCAI Jun. 25, 2001. pp. 1-15.
Ayanoglu, “VOFDM braodband wireless transmission and its advantages over single carrier modulation”, ICC 2001. IEEE International Conference on Communications, 2001. vol. 6, Jun. 11-14, 2001 pp. 1660-1664 vol. 6.
Rine, “Pilot spacing in orthogonal frequency division multiplexing systems on practical channels”.IEEE Trans Comsumer Electronics, 1996,42(4):959-962.
Negi, “Pilot tone selection for channel estimation in a mobile OFDM system,” IEEE Trans. Consum. Electron., vol. 44, No. 3, pp. 1122-1128, Aug. 1998.
Broadcom Corporation
Garlick & Harrison & Markison
Ghayour Mohammed
Short Shayne X.
Torres Juan Alberto
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