MIMO-OFDM Channel Estimation with Minimum Differential Feedback for Time-Correlated Rayleigh Block-Fading Channels

Provided by: International Journal of P2P Network Trends and Technology(IJPTT)
Topic: Networking
Format: PDF
In Multi-Input Multi-Output (MIMO) based Cognitive Radio (CR) systems, with the increasing demand for data rate and reliability in wireless communications and devices, several issues become very important like bandwidth efficiency, quality of service and radio coverage. The authors first derive the closed-form expression of the minimum differential feedback rate to achieve the maximum erdodic capacity in the presence of channel estimation errors and quantization distortion at the receiver. With the feedback channel transmission rate constraint, in the periodic feedback system, they further investigate the relationship of the ergodic capacity and the differential feedback interval, first formulate the pilot design as a new optimization problem.

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