TY - GEN
T1 - Power control in opportunistic spectrum access cognitive radio with sensing information at transmitter
AU - Peh, Edward C.Y.
AU - Liang, Ying Chang
AU - Guan, Yong Liang
AU - Zeng, Yonghong
PY - 2011
Y1 - 2011
N2 - In an opportunistic spectrum access based cognitive radio network, the secondary user (SU) does not transmit when the primary user (PU) is detected to be present. If the SU detects that the PU is inactive during a sensing period, it is usually assumed that the SU will transmit its data at peak power in the following data transmission frame. However, when the PU is detected to be inactive, the PU may not definitely be inactive as it may be a case of miss-detection. If it is a miss-detection, the SU's data rate for that particular data frame will be reduced due to interference from the PU. In this paper, power allocation strategies are designed for each data frame based on the spectrum sensing information (SSI) gathered during the sensing period. Using the SSI, the miss-detection probability for a data frame is taken into consideration to maximize the average data rate and minimize the outage probability of the SU while ensuring that the probability of detecting the PU is above a targeted threshold and the SU satisfies the long-term transmit power budget. Our simulation results showed that the transmit power of the SU should indeed be a function of the SSI in order to maximize the average data rate and minimize the outage probability.
AB - In an opportunistic spectrum access based cognitive radio network, the secondary user (SU) does not transmit when the primary user (PU) is detected to be present. If the SU detects that the PU is inactive during a sensing period, it is usually assumed that the SU will transmit its data at peak power in the following data transmission frame. However, when the PU is detected to be inactive, the PU may not definitely be inactive as it may be a case of miss-detection. If it is a miss-detection, the SU's data rate for that particular data frame will be reduced due to interference from the PU. In this paper, power allocation strategies are designed for each data frame based on the spectrum sensing information (SSI) gathered during the sensing period. Using the SSI, the miss-detection probability for a data frame is taken into consideration to maximize the average data rate and minimize the outage probability of the SU while ensuring that the probability of detecting the PU is above a targeted threshold and the SU satisfies the long-term transmit power budget. Our simulation results showed that the transmit power of the SU should indeed be a function of the SSI in order to maximize the average data rate and minimize the outage probability.
UR - http://www.scopus.com/inward/record.url?scp=80052161595&partnerID=8YFLogxK
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U2 - 10.1109/icc.2011.5963430
DO - 10.1109/icc.2011.5963430
M3 - Conference contribution
AN - SCOPUS:80052161595
SN - 9781612842332
T3 - IEEE International Conference on Communications
BT - 2011 IEEE International Conference on Communications, ICC 2011
T2 - 2011 IEEE International Conference on Communications, ICC 2011
Y2 - 5 June 2011 through 9 June 2011
ER -