TY - GEN
T1 - Optimal power and bit allocation schemes for ultra wideband cognitive radio systems
AU - Zeng, Liaoyuan
AU - McGrath, Sean
AU - Cano, Eduardo
PY - 2009
Y1 - 2009
N2 - An optimal power and bit allocation scheme for rate maximization in the ultra wideband (UWB) cognitive radio system is presented in this paper. The scheme generates a series of M-ary quadrature amplitude modulation (M-QAM) zones over each UWB subcarrier. Total transmit power is optimally distributed among the UWB subcarriers for the use of the M-QAM modulation with a maximum M on each subcarrier. This optimization is constrained by the probability of detection, probability of false alarm, bit error rate and the UWB transmit power spectral density mask. The performance of the scheme is analyzed over different UWB fading channels. The results show that the system data rate is significantly improved by using the proposed power and bit allocation scheme.
AB - An optimal power and bit allocation scheme for rate maximization in the ultra wideband (UWB) cognitive radio system is presented in this paper. The scheme generates a series of M-ary quadrature amplitude modulation (M-QAM) zones over each UWB subcarrier. Total transmit power is optimally distributed among the UWB subcarriers for the use of the M-QAM modulation with a maximum M on each subcarrier. This optimization is constrained by the probability of detection, probability of false alarm, bit error rate and the UWB transmit power spectral density mask. The performance of the scheme is analyzed over different UWB fading channels. The results show that the system data rate is significantly improved by using the proposed power and bit allocation scheme.
UR - http://www.scopus.com/inward/record.url?scp=70449371828&partnerID=8YFLogxK
U2 - 10.1109/CROWNCOM.2009.5189092
DO - 10.1109/CROWNCOM.2009.5189092
M3 - Conference contribution
AN - SCOPUS:70449371828
SN - 9781424434244
T3 - Proceedings of the 2009 4th International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2009
BT - Proceedings of the 2009 4th International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2009
T2 - 2009 4th International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2009
Y2 - 22 June 2009 through 24 June 2009
ER -