TY - GEN
T1 - Signal separation and reconstruction method for simultaneously received multi-system signals in a unified wireless system
AU - Yamada, Takayuki
AU - Lee, Doohwan
AU - Shiba, Hiroyuki
AU - Yamaguchi, Yo
AU - Uehara, Kazuhiro
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011
Y1 - 2011
N2 - These days, a wide variety of wireless systems are used and new wireless systems appear one after another on the market. In this regard, we proposed a unified wireless system that we call flexible wireless system. Comprising flexible access points and a flexible signal processing unit, it collectively receives a wideband spectrum that includes multiple signals from various wireless systems. In cases of simultaneous multiple signal reception, however, reception performance degrades due to the interference among multiple signals. To address this problem, we propose a new signal separation and reconstruction method for spectrally overlapped signals. The method analyzes spectral information obtained by the short time Fourier transform to extract amplitude and phase values at each center frequency of overlapped signals. Using these values enables signals from received radio wave data to be separated and reconstructed for simultaneous multi-system reception. Computer simulation results obtained in evaluating the method's performance confirmed its effectiveness.
AB - These days, a wide variety of wireless systems are used and new wireless systems appear one after another on the market. In this regard, we proposed a unified wireless system that we call flexible wireless system. Comprising flexible access points and a flexible signal processing unit, it collectively receives a wideband spectrum that includes multiple signals from various wireless systems. In cases of simultaneous multiple signal reception, however, reception performance degrades due to the interference among multiple signals. To address this problem, we propose a new signal separation and reconstruction method for spectrally overlapped signals. The method analyzes spectral information obtained by the short time Fourier transform to extract amplitude and phase values at each center frequency of overlapped signals. Using these values enables signals from received radio wave data to be separated and reconstructed for simultaneous multi-system reception. Computer simulation results obtained in evaluating the method's performance confirmed its effectiveness.
KW - Flexible Wireless System
KW - short-time Fourier transform
KW - signal reconstruction
KW - signal separation
UR - http://www.scopus.com/inward/record.url?scp=80054757534&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80054757534&partnerID=8YFLogxK
U2 - 10.4108/icst.crowncom.2011.245899
DO - 10.4108/icst.crowncom.2011.245899
M3 - Conference contribution
AN - SCOPUS:80054757534
SN - 9781936968190
T3 - Proceedings of the 2011 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2011
SP - 136
EP - 140
BT - Proceedings of the 2011 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2011
T2 - 2011 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2011
Y2 - 1 June 2011 through 3 June 2011
ER -