Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2007-10-09
2007-10-09
Pham, Chi (Department: 2616)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S208000, C370S436000, C370S478000
Reexamination Certificate
active
10252443
ABSTRACT:
An OFDM transmitting and receiving apparatus where the receiving unit receives an OFDM signal. A computing unit in the receiving unit computes a value of a channel response characteristic of each transmission channel corresponding to subcarriers contained in the received OFDM signal, and obtains a computed value. A comparing unit compares the computed value with a predetermined threshold value, and computes a ratio of the number of the subcarriers including the value of the channel response characteristic higher than the predetermined threshold value, to the number of all the subcarriers, and obtaining a computed ratio. A setting unit sets a transmission condition based on at least the computed ratio. A transmitting unit transmits an OFDM signal based on the transmission condition set.
REFERENCES:
patent: 5784363 (1998-07-01), Engström et al.
patent: 6128276 (2000-10-01), Agee
patent: 6175550 (2001-01-01), Van Nee
patent: 6314289 (2001-11-01), Eberlein et al.
patent: 6351499 (2002-02-01), Paulraj et al.
patent: 6618454 (2003-09-01), Agrawal et al.
patent: 6985434 (2006-01-01), Wu et al.
patent: 2002/0122383 (2002-09-01), Wu et al.
patent: 1071251 (2001-01-01), None
patent: 1469649 (2004-10-01), None
Vadde, V. et al., “Partial Response Signaling for Enhanced Spectral Efficiency and RF Performance in OFDM Systems,” IEEE Global Telecommunications Conference, Nov. 2001, vol. 5, pp. 3120-3124.
Shuangchun, L. et al., “Channel Estimation Based on Pilot Subcarrier in Space-Time Block Coded OFDM System,” International Conference on Communication Technology Proceedings, Apr. 2003, vol. 2, pp. 1795-1798.
H. Rohling, et al., Vehicular Technology Conference, Mobile Technology for the Human Race, XP-010162661, pp. 1589-1593, “Performance of an OFDM-TDMA Mobile Communication System”, Apr. 28, 1996.
Mills Donald L
Pham Chi
LandOfFree
OFDM transmitting and receiving apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with OFDM transmitting and receiving apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and OFDM transmitting and receiving apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3875782