Methods for optimizing time variant communication channels

Details Methods for optimizing time variant communication channels Methods for optimizing time variant communication channels

2007-04-03

2007-04-03

Phu, Phuong (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S267000, C375S299000

Reexamination Certificate

active

10439770

ABSTRACT:
Methods and apparatus for optimizing wireless communications channels by employing multi-channel modulation techniques in wireless communication systems is disclosed. The wireless communications channel may comprise tones, and data may be allocated differently among the different tones according to the channel characterization measurements. In one embodiment, a method may include: transmitting data over a wireless channel using a first station (e.g., an access point), receiving the data using a second station, performing calculations on the received data, and allocating subsequent data transmissions among the tones according to the calculations. Other embodiments may utilize superfluous data transmissions—for example, data coming from the access point that is intended for other stations—in order to calculate channel characterization. Preferably, any portion of the transmitted data (e.g., preamble, header, data, etc.) may be used to calculate channel characterization.

REFERENCES:
patent: 6956835 (2005-10-01), Tong et al.
patent: 2002/0154705 (2002-10-01), Walton et al.
patent: 2003/0218973 (2003-11-01), Oprea et al.
patent: 2004/0081127 (2004-04-01), Gardner et al.
patent: 2004/0141548 (2004-07-01), Shattil

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