Paper Info
Title
ISI and ICI Suppression for Mobile OFDM System by Using a Hybrid 2-Layer Diversity Receiver
Abstract
An OFDM system is very sensitive to orthogonality relation. For a mobile wireless system, it is impossible to avoid Doppler-induced inter carrier interference (ICI). Moreover, while beyond guard interval delayed signal exists in channel, the delay-induced ICI and inter symbol interference (ISI) will occur. Although a conventional carrier diversity (CD) receiver can render the OFDM system less sensitive to the white-noise-likely ICI, but it requires significant channel knowledge. On the other hand, a pre-FFT adaptive array (AA) receiver can improve the instantaneous signal to interference-and-noise ratio (SINR) at the input of FFT. In this paper, a hybrid AA/CD two layers receiver is investigated not only on a tradeoff between high performance and low complexity, but also into a method for both ISI and ICI suppression. Simulation results show that a suitable combination of pre-FFT AA and post-FFT CD can provide good performance by comparison with conventional OFDM receiver in mobile wireless channel, especially, while ISI and ICI occur at the same time.
Year
DOI
Venue
2010
10.1007/978-3-642-17758-3_2
MOBILWARE
Keywords
Field
DocType
doppler,adaptive array,carrier diversity.,beyond gi delay,white noise
Telecommunications,Mobile wireless,Computer science,Communication channel,Computer network,Orthogonality,Electronic engineering,Fast Fourier transform,Guard interval,Interference (wave propagation),Zero-forcing precoding,Orthogonal frequency-division multiplexing
Conference
Citations 
PageRank 
References 
0
0.34
7
Authors
2
Name
Order
Citations
PageRank
Jing Gao100.34
Tomohisa Wada2114.25