Method of reducing feedback channel state information within...

Details Method of reducing feedback channel state information within... Method of reducing feedback channel state information within...

2004-02-09

2009-02-17

Patel, Ajit (Department: 2617)

Multiplex communications

Generalized orthogonal or special mathematical techniques

C370S343000

Reexamination Certificate

active

07492699

ABSTRACT:
A method of reducing channel state information fed back in an adaptive orthogonal frequency division multiple access system when transmitting and receiving data packets between a base station and a mobile station using an orthogonal frequency division multiplexing method comprising adaptive modulation and coding. The method includes: transmitting a data packet comprising information as to whether adaptive modulation and coding is on or off from the base station to the mobile station via a downlink; and tracking a modulation and coding scheme level only when it is determined that adaptive modulation and coding is performed based on the information as to whether adaptive modulation and coding is on or off and feeding back the channel state information obtained from the tracking result from the mobile station to the base station via an uplink.

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