Name
Abstract | ||
|---|---|---|
In this paper, error rate performance of cognitive radio transmissions is studied in the presence of imperfect channel sensing decisions. It is assumed that cognitive users first perform channel sensing, albeit with possible errors. Then, depending on the sensing decisions, they select the transmission energy level and employ MI × MQ rectangular quadrature amplitude modulation (QAM) for data transmission over a fading channel. In this setting, the optimal decision rule is formulated under the assumptions that the receiver is equipped with the sensing decision and perfect knowledge of the channel fading. It is shown that the thresholds for optimal detection at the receiver are the midpoints between the signals under any sensing decision. Subsequently, minimum average error probability expressions for M-ary pulse amplitude modulation (M-PAM) and MI × MQ rectangular QAM transmissions attained with the optimal detector are derived. The effects of imperfect channel sensing decisions on the average symbol error probability are analyzed. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1109/VTCFall.2013.6692196 | IEEE Transactions on Wireless Communications |
Keywords | Field | DocType |
error rate performance,secondary receiver,symbol error probability,interference constraint,transmission energy level,gaussian mixture model,optimal detector,minimum average error probability expressions,primary user received faded signal,rectangular qam transmissions,optimal decision rule,radiofrequency interference,probability of detection,sss,average symbol error probability,gaussian distribution,cognitive radio,error analysis,fading channels,channel fading,fading channel,transmit power,qam,interference power constraint,symbol error rate performance,imperfect channel sensing decision,channel sensing,pam,radio spectrum management,pulse amplitude modulation,transmission power level,opportunistic spectrum access,primary user,quadrature amplitude modulation,rectangular qam,error rate analysis,secondary user,primary user activity,imperfect channel sensing decisions,cognitive radio transmissions,osa,transmission scheme,m-ary pulse amplitude modulation,probability of false alarm,data transmission,error statistics,sensing-based spectrum sharing,m-pam,arbitrary modulation scheme,rectangular quadrature amplitude modulation,cognitive radio transmission,probability,gaussian mixture distribution,optimal detection,gaussian mixture noise,cognitive users,error probability,interference,sensors | Transmitter power output,Quadrature amplitude modulation,Telecommunications,Computer science,Fading,Word error rate,QAM,Communication channel,Real-time computing,Electronic engineering,Pulse-amplitude modulation,Cognitive radio | Journal |
Volume | Issue | ISSN |
13 | 3 | 1090-3038 |
Citations | PageRank | References |
14 | 0.61 | 20 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Gozde Ozcan | 1 | 64 | 7.70 |
| Mustafa Cenk Gursoy | 2 | 685 | 80.70 |
| Sinan Gezici | 3 | 27 | 2.85 |