Paper Info
Title
Blind Interference Suppression Scheme By Eigenvector Beamspace Cma Adaptive Array With Subcarrier Transmission Power Assignment For Spectrum Superposing
Abstract
This paper proposes a novel blind adaptive array scheme with subcarrier transmission power assignment (STPA) for spectrum superposing in cognitive radio networks. The Eigenvector Beamspace Adaptive Array (EBAA) is known to be one of the blind adaptive array algorithms that can suppress inter-system interference without any channel state information (CSI). However, EBAA has difficulty in suppressing interference signals whose Signal to Interference power Ratio (SIR) values at the receiver are around 0 dB. With the proposed scheme, the ST intentionally provides a level difference between subcarriers. At the receiver side, the 1st eigenvector of EBAA is applied to the received signals of the subcarrier assigned higher power and the 2nd eigenvector is applied to those assigned lower power. In order to improve interference suppression performance, we incorporate Beamspace Constant Modulus Algorithm (BSCMA) into EBAA (E-BSCMA). Additionally, STPA is effective in reducing the interference experienced by the primary system. Computer simulation results show that the proposed scheme can suppress interference signals received with SIR values of around 0 dB while improving operational SIR for the primary system. It can enhance the co-existing region of 2 systems that share a spectrum.
Year
DOI
Venue
2015
10.1587/transcom.E98.B.1050
IEICE TRANSACTIONS ON COMMUNICATIONS
Keywords
Field
DocType
adaptive array, Subcarrier Transmission Power Assignment (STPA), blind algorithm, Eigenvector Beamspace Adaptive Array (EBAA), Constant Modulus Algorithm (CMA), spectrum superposing
Subcarrier,Transmission (mechanics),Mathematical optimization,Computer science,Electronic engineering,Interference (wave propagation),Eigenvalues and eigenvectors,Distributed computing
Journal
Volume
Issue
ISSN
E98B
6
1745-1345
Citations 
PageRank 
References 
0
0.34
2
Authors
3
Name
Order
Citations
PageRank
Kazuki Maruta12123.36
Jun Mashino21411.25
Takatoshi Sugiyama34817.44