TY - GEN
T1 - Improved spectrum efficiency for transform domain communication systems
AU - Hu, Su
AU - Li, Shaoqian
AU - Bi, Guoan
AU - Guan, Yong Liang
PY - 2013
Y1 - 2013
N2 - As an overlay cognitive radio system, transform domain communication system (TDCS) has been proposed to support multiuser communication with low spectral density by using spectrum bin nulling and frequency domain spreading. It has been shown that TDCS has a low spectrum efficiency compared to other wireless communication systems. To solve this problem, this paper presents a cluster-based TDCS scheme to improve spectrum efficiency. Different from the utility of clusters in OFDM systems, the entire unoccupied spectrum bins are divided into L clusters, where each one is used for transmitting the data stream independently, to obtain L times spectrum efficiency of the traditional scheme. Simulation results demonstrate that the proposed TDCS using random allocation scheme is shown to provide the capability of improving spectrum efficiency without seriously degrading power efficiency.
AB - As an overlay cognitive radio system, transform domain communication system (TDCS) has been proposed to support multiuser communication with low spectral density by using spectrum bin nulling and frequency domain spreading. It has been shown that TDCS has a low spectrum efficiency compared to other wireless communication systems. To solve this problem, this paper presents a cluster-based TDCS scheme to improve spectrum efficiency. Different from the utility of clusters in OFDM systems, the entire unoccupied spectrum bins are divided into L clusters, where each one is used for transmitting the data stream independently, to obtain L times spectrum efficiency of the traditional scheme. Simulation results demonstrate that the proposed TDCS using random allocation scheme is shown to provide the capability of improving spectrum efficiency without seriously degrading power efficiency.
KW - cluster
KW - cognitive radio
KW - spectrum and power efficiency
KW - transform domain communication system
UR - http://www.scopus.com/inward/record.url?scp=84893295016&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84893295016&partnerID=8YFLogxK
U2 - 10.1109/WOCC.2013.6676333
DO - 10.1109/WOCC.2013.6676333
M3 - Conference contribution
AN - SCOPUS:84893295016
SN - 9781467356992
T3 - Proceedings - 2013 Wireless and Optical Communications Conference, WOCC 2013
SP - 18
EP - 22
BT - Proceedings - 2013 Wireless and Optical Communications Conference, WOCC 2013
T2 - 22nd Wireless and Optical Communications Conference, WOCC 2013
Y2 - 16 May 2013 through 18 May 2013
ER -