Optimum training sequences for wireless systems

Details Optimum training sequences for wireless systems Optimum training sequences for wireless systems

2006-09-05

2006-09-05

Corrielus, Jean B. (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S316000, C455S216000

Reexamination Certificate

active

07103115

ABSTRACT:
In various embodiments, techniques are provided to determine channel characteristics of various communication systems such as OFDM systems or systems using a plurality of transmit antennas by using various sets of training symbols that produce zero cross-correlation energy. Channel communication can accordingly be simplified as the zero cross-correlation property allows for channel estimation without a matrix inversion.

REFERENCES:
patent: 6298035 (2001-10-01), Heiskala
patent: 6421327 (2002-07-01), Lundby et al.
patent: 6473393 (2002-10-01), Lek et al.
patent: 6611551 (2003-08-01), Jones et al.
patent: 6842442 (2005-01-01), Okawa et al.
Wikipedia, Orthogonal Grequency Division Multiplexing, Characteristics, found Jan. 9, 2006, http://en.wikipedia.org/wiki/OFDM.
Li, Y., “Optimum Training Sequences for OFDM Systems with Multiple Transmit Antennas,” Globecom'00, IEEE Globasl Telelcommunication Conference, vol. 3 of 3, Nov. 27, 2000.
Li, et al., “Channel Estimation of OFDM Systems with Transmitter Diversity in Mobile Wireless Channels,” IEEE Journal on Selected Areas in Communications, vol. 17, No. 3, Mar. 1999, 461.
Copy European Search Report dated Dec. 6, 2004 for corresponding European Patent Application No. 02253493.7.

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