Thats a unique idea.You should consider the following idea to enhance your idea so that it would impact uniquely:  study the impact of multiple relays on the primary user (PU) and secondary user (SU) rates of underlay MIMO cognitive radio. Both users exploit amplify-and-forward relays to communicate with the destination. A space alignment technique and a special linear precoding and decoding scheme are applied to allow the SU to use the resulting free eigenmodes. In addition, the SU can communicate over the used eigenmodes under the condition of respecting an interference constraint tolerated by the PU. At the destination, a successive interference cancel- lation (SIC) is performed to estimate the secondary signal.  present the explicit expressions of the optimal PU and SU pors that maximize their achievable rates. In the numerical results,  show that our scheme provides cognitive rate gain even in absence of tolerated interference. In addition,  show that increasing the number of relays enhances the PU and SU rates at low por regime and/or when the relays por is sufficiently high.
['Lokman Sboui', 'Hakim Ghazzai', 'Zouheir Rezki', 'Mohamed-Slim Alouini']
I am writing a research paper on a idea Achievable Rate of Multi-relay Cognitive Radio MIMO Channel with Space Alignment
[{"from": "human", "value": "I am writing a research paper on a idea Achievable Rate of Multi-relay Cognitive Radio MIMO Channel with Space Alignment"}, {"from": "gpt", "value": "Thats a unique idea.You should consider the following idea to enhance your idea so that it would impact uniquely:  study the impact of multiple relays on the primary user (PU) and secondary user (SU) rates of underlay MIMO cognitive radio. Both users exploit amplify-and-forward relays to communicate with the destination. A space alignment technique and a special linear precoding and decoding scheme are applied to allow the SU to use the resulting free eigenmodes. In addition, the SU can communicate over the used eigenmodes under the condition of respecting an interference constraint tolerated by the PU. At the destination, a successive interference cancel- lation (SIC) is performed to estimate the secondary signal.  present the explicit expressions of the optimal PU and SU pors that maximize their achievable rates. In the numerical results,  show that our scheme provides cognitive rate gain even in absence of tolerated interference. In addition,  show that increasing the number of relays enhances the PU and SU rates at low por regime and/or when the relays por is sufficiently high."}]