Interference Suppression Capability of Array Antenna Using Cyclic Prefix in Block Transmission

Hiroaki WATAHIKI  Teruyuki MIYAJIMA  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E91-A   No.8   pp.2045-2047
Publication Date: 2008/08/01
Online ISSN: 1745-1337
DOI: 10.1093/ietfec/e91-a.8.2045
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section on Signal Processing)
Category: 
Keyword: 
blind adaptive array antenna,  inter-block interference,  OFDM,  

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Summary: 
In block transmission systems, performance degrades due to inter-block interference (IBI) when there are multipaths with delays exceeding cyclic prefix (CP) length. An interesting technique to overcome this problem is an array antenna proposed by Hori et al., which restores the CP property by minimizing a cost function. However, its performance has not been theoretically cleared. In this letter, the performance of a method which minimizes the cost function under a unit norm constraint is analyzed. It is shown that the method can suppress IBI and its interference suppression capability depends on a certain parameter. The analytical result is verified through computer simulation.