Title :
Complexity Adaptive OFDM Systems
Author :
Jian Zhang ; Ying Chen ; Jayalath, Dhammika
Author_Institution :
Wireless Signal Process. Program, Nat. ICT Australia, Australia
Abstract :
One disadvantage with current OFDM systems is, the system complexity associated with FFT module, equaliser, etc. is almost fixed and varies little with information bit rate. In this paper, based on an innovative "layered" concept in FFT algorithms, we propose a novel OFDM system whose complexity is adaptive to the desired bit rate and system performance by exploiting transmitter diversity. Different diversity options in the transmitter and receiver are discussed, and verified in simulations.
Keywords :
OFDM modulation; adaptive modulation; broadband networks; diversity reception; fast Fourier transforms; matrix algebra; FFT algorithms; complexity adaptive OFDM systems; information bit rate; transmitter diversity; Adaptive systems; Bit rate; Convolution; Diversity reception; Multiaccess communication; OFDM; RAKE receivers; Signal processing algorithms; System performance; Transmitters; FFT; OFDM;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2007. ICASSP 2007. IEEE International Conference on
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0727-3
DOI :
10.1109/ICASSP.2007.366552
