Paper Info
Title
An Efficient Framework to Exploit Frequency Diversity in OFDM: Precoding with Adaptive Subcarrier Selection
Abstract
We propose adaptive subcarrier selection (ACS) as an efficient technique of improving the error performance of grouped linear constellation precoding (GLCP) OFDM in the low-to-medium SNR range (0-20 dB). Recently, GLCP-OFDM has been pro- posed to achieve frequency diversity (multipath diversity) in OFDM overcoming the problem of channel nulls (deep fades in frequency-domain). In GLCP-OFDM, symbol precoding is performed on subgroups of OFDM subcarriers rather than on the total number of OFDM subcarriers which is large in practice. This reduces the receiver decoding complexity while maintaining the high SNR frequency diversity benefit - though the error performance in the low SNR regime is worse than a non-precoded system. In contrast, the proposed GLCP-ACS- OFDM improves the error performance in the low-to-medium SNR range without increasing the receiver complexity. Simu- lation results demonstrate the superior performance of GLCP- ACS-OFDM over GLCP-OFDM for a practical range of SNR as applicable to mobile wireless communications.
Year
DOI
Venue
2006
10.1109/PIMRC.2006.254299
PIMRC
Keywords
Field
DocType
communication satellites,computational complexity,signal to noise ratio,computer networks,frequency division multiplexing,wireless communication,orthogonal frequency division multiplexing,frequency diversity,decoding,multitasking,frequency domain,precoding,ofdm modulation,communication,ofdm
Subcarrier,Diversity scheme,Computer science,Frequency-division multiplexing,Signal-to-noise ratio,Computer network,Decoding methods,Precoding,Orthogonal frequency-division multiplexing,Computational complexity theory
Conference
Citations 
PageRank 
References 
3
0.43
6
Authors
3
Name
Order
Citations
PageRank
Chandranath R. N. Athaudage1837.99
Jian Wang22526.58
anagiyaddage dhammik jayalath3446.93