Abstract
In the letter the problem of cooperative spectrum sensing is investigated in cognitive radio (CR) networks over Rayleigh fading channels. By taking into account the error effect on the decision reporting, a general performance analysis of cooperative spectrum sensing is given. The analytical detection results show that the performance of cooperative spectrum sensing is limited by the probability of reporting errors. To deal with this limitation, we propose a transmit diversity based cooperative spectrum sensing method. By regarding multiple CRs as a virtual antenna array, space-time coding and spacefrequency coding are applied into CR networks over flat-fading and frequency-selective fading channels, respectively. Moreover, we propose a relay diversity based cooperative spectrum sensing approach to increase the diversity of detection when some CRs are in heavy shadowing. It is then shown that, when combined with algebraic coding, relay diversity can further improve the cooperative spectrum sensing performance.
| Original language | English |
|---|---|
| Article number | 4712688 |
| Pages (from-to) | 4761-4766 |
| Number of pages | 6 |
| Journal | IEEE Transactions on Wireless Communications |
| Volume | 7 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Dec 2008 |
| Externally published | Yes |
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Keywords
- Cognitive radio
- Diversity technique
- Relay channels
- Space-frequency coding
- Space-time coding
ASJC Scopus subject areas
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Cite this
Cooperative spectrum sensing with transmit and relay diversity in cognitive radio networks - [transaction letters]. / Zhang, Wei; Letaief, Khaled.
In: IEEE Transactions on Wireless Communications, Vol. 7, No. 12, 4712688, 12.2008, p. 4761-4766.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Cooperative spectrum sensing with transmit and relay diversity in cognitive radio networks - [transaction letters]
AU - Zhang, Wei
AU - Letaief, Khaled
PY - 2008/12
Y1 - 2008/12
N2 - In the letter the problem of cooperative spectrum sensing is investigated in cognitive radio (CR) networks over Rayleigh fading channels. By taking into account the error effect on the decision reporting, a general performance analysis of cooperative spectrum sensing is given. The analytical detection results show that the performance of cooperative spectrum sensing is limited by the probability of reporting errors. To deal with this limitation, we propose a transmit diversity based cooperative spectrum sensing method. By regarding multiple CRs as a virtual antenna array, space-time coding and spacefrequency coding are applied into CR networks over flat-fading and frequency-selective fading channels, respectively. Moreover, we propose a relay diversity based cooperative spectrum sensing approach to increase the diversity of detection when some CRs are in heavy shadowing. It is then shown that, when combined with algebraic coding, relay diversity can further improve the cooperative spectrum sensing performance.
AB - In the letter the problem of cooperative spectrum sensing is investigated in cognitive radio (CR) networks over Rayleigh fading channels. By taking into account the error effect on the decision reporting, a general performance analysis of cooperative spectrum sensing is given. The analytical detection results show that the performance of cooperative spectrum sensing is limited by the probability of reporting errors. To deal with this limitation, we propose a transmit diversity based cooperative spectrum sensing method. By regarding multiple CRs as a virtual antenna array, space-time coding and spacefrequency coding are applied into CR networks over flat-fading and frequency-selective fading channels, respectively. Moreover, we propose a relay diversity based cooperative spectrum sensing approach to increase the diversity of detection when some CRs are in heavy shadowing. It is then shown that, when combined with algebraic coding, relay diversity can further improve the cooperative spectrum sensing performance.
KW - Cognitive radio
KW - Diversity technique
KW - Relay channels
KW - Space-frequency coding
KW - Space-time coding
UR - http://www.scopus.com/inward/record.url?scp=58149105303&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=58149105303&partnerID=8YFLogxK
U2 - 10.1109/T-WC.2008.060857
DO - 10.1109/T-WC.2008.060857
M3 - Article
AN - SCOPUS:58149105303
VL - 7
SP - 4761
EP - 4766
JO - IEEE Transactions on Wireless Communications
JF - IEEE Transactions on Wireless Communications
SN - 1536-1276
IS - 12
M1 - 4712688
ER -