Channel estimation for OFDM communication systems

Multiplex communications – Generalized orthogonal or special mathematical techniques

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C370S210000, C370S207000, C370S208000, C370S342000, C370S343000, C370S335000, C370S480000, C455S063100, C455S450000, C455S067110, C455S067160, C455S464000, C375S340000, C375S342000, C375S346000, C375S347000

Reexamination Certificate

active

07039001

ABSTRACT:
Techniques to estimate the frequency response of a wireless channel in an OFDM system. In one method, an initial estimate of the frequency response of the wireless channel is obtained for a first group of subbands based on a pilot transmission received via the subbands in the first group. An estimate of the impulse response of the wireless channel is then derived based on the initial frequency response estimate. An enhanced estimate of the frequency response of the wireless channel is then derived for a second group of subbands based on the impulse response estimate. The first and second groups may each include all or only a subset of the usable subbands. Subband multiplexing may be used to allow simultaneous pilot transmissions by multiple terminals on their associated groups of subbands.

REFERENCES:
patent: 6473393 (2002-10-01), Ariyavisitakul et al.
patent: 6477210 (2002-11-01), Chuang et al.
patent: 6545997 (2003-04-01), Bohnke et al.
patent: 6549561 (2003-04-01), Crawford
patent: 6563858 (2003-05-01), Fakatselis et al.
patent: 6567374 (2003-05-01), Bohnke et al.
patent: 6597745 (2003-07-01), Dowling
patent: 6603801 (2003-08-01), Andren et al.
patent: 6618454 (2003-09-01), Agrawal et al.
patent: 6633616 (2003-10-01), Crawford
patent: 6636568 (2003-10-01), Kadous
patent: 6654429 (2003-11-01), Li
patent: 6661832 (2003-12-01), Sindhushayana et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Channel estimation for OFDM communication systems does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Channel estimation for OFDM communication systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Channel estimation for OFDM communication systems will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3597534

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.