Name
Title | ||
|---|---|---|
Cognitive Cooperative MAC With One Primary and Two Secondary Users: Achievable Rates and Optimal Power Control |
Abstract | ||
|---|---|---|
We consider a three-user fading cognitive cooperative multiple access channel (MAC) with one primary and two secondary transmitters. We propose two encoding/decoding strategies with varying levels of cooperation, based on block Markov superposition encoding and backward decoding. The first is an overlay model, where the secondary users (SUs) aid the transmission of the primary user (PU) by causally decoding the PU message and forwarding it while also cooperating among each other. The second is an underlay model, where the SUs cooperate by decoding and forwarding each other's messages while treating the signal received from the PU as noise. In either case, the PU is guaranteed to operate at its maximum achievable single user rate. We characterize the achievable SU rate region for both models and maximize this region as a function of the transmit powers. The simulation results show that the SU rate region can be significantly enlarged, particularly using the overlay model. |
Year | DOI | Venue |
|---|---|---|
2014 | 10.1109/LCOMM.2014.2360519 | Communications Letters, IEEE |
Keywords | Field | DocType |
Markov processes,block codes,channel coding,cognitive radio,cooperative communication,decoding,fading channels,multi-access systems,optimal control,power control,telecommunication control,PU,SU rate region,backward decoding,block Markov superposition encoding,cognitive cooperative MAC,encoding-decoding strategy,optimal power control,overlay model,primary transmitters,primary users,rate control,secondary transmitters,secondary users,single user rate,three-user fading cognitive cooperative multiple access channel,underlay model,Channel coding,cognitive radio,cooperativecommunication,multiuser channels,optimization,power control | Computer science,Fading,Power control,Markov chain,Communication channel,Computer network,Underlay,Decoding methods,Encoding (memory),Cognitive radio | Journal |
Volume | Issue | ISSN |
18 | 11 | 1089-7798 |
Citations | PageRank | References |
1 | 0.34 | 11 |
Authors | ||
2 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Çagatay Edemen | 1 | 1 | 0.34 |
| Onur Kaya | 2 | 106 | 13.85 |