OFDM communication system and method

Details OFDM communication system and method OFDM communication system and method

2008-07-08

2008-07-08

Bocure, Tesfaldet (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S146000, C375S147000, C370S208000

Reexamination Certificate

active

07397839

ABSTRACT:
A transmitter used in a wireless communication system based on an orthogonal frequency division multiplexing (OFDM) scheme includes a determination unit that determines a spreading factor and an amplitude for a control channel based on at least one of signal quality information and interference information in data transmission. The transmitter also includes a multiplexing unit that multiplexes a data channel with the control channel having been code-spread based on the spreading factor and the amplitude. A modulator then modulates the multiplexed signal in the OFDM scheme for transmission as OFDM symbols.

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Noriyuki Maeda, et al., “Variable Spreading Factor-OFCDM with Two Dimensional Spreading that Prioritizes Time Domain Spreading for Forward Link Broadband Wireless Access”, 57th IEEE Semiannual Vehicular Technology Conference, vol. 1, XP-002328610, 2003, pp. 127-132.

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