Adaptive basis functions in a multicarrier communication system

Details Adaptive basis functions in a multicarrier communication system Adaptive basis functions in a multicarrier communication system

2005-11-30

2009-11-17

Tran, Khanh C (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C370S210000

Reexamination Certificate

active

07620112

ABSTRACT:
A method for transmitting a signal uses a channel impulse response to determine a sub-carrier frequency function for at least two different basis functions. For each of the at least two sub-carrier frequency functions, a performance measure is predicted using the associated frequency function. These predicted performance measures are then stored and compared. One of the at least two basis functions are selected based on the comparing. A signal to be transmitted is converted from the frequency to the time domain using the selected basis function, and then transmitted over multiple sub-carriers via a time radio-frequency channel. Adaptive modulation, coding, bit and/or power loading may also be used in conjunction with the adaptive basis functions. A transmitter, modulator, and computer program are also described.

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Clive Tang et al., “Performance of OFDM Modem with Alternative Basis Functions”, Radio and Wireless Symposium, 2006 IEEE, pp. 551-554, Jan. 17-19, 2006, sections I and VI, abstract.

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