Channel mapping for OFDM

Details Channel mapping for OFDM Channel mapping for OFDM

2008-01-08

2008-01-08

Pham, Chi (Department: 2616)

Multiplex communications

Generalized orthogonal or special mathematical techniques

C370S206000, C370S210000

Reexamination Certificate

active

07317680

ABSTRACT:
The present invention provides a technique for supporting variable bitrate services in an OFDM environment while minimizing the impact of the variations of fading channels and interference. In general, a basic access channel (BACH) is defined by a set number of sub-carriers over multiple OFDM symbols. While the number of sub-carriers remains fixed for the BACH, the sub-carriers for any given BACH will hop from one symbol to another. Thus, the BACH is defined by a hopping pattern for a select number of sub-carriers over a sequence of symbols.

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