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In this paper, we investigate the resource management problem in orthogonal frequency division multiplexing (OFDM) based multiple-input multiple-output (MIMO) cognitive radio (CR) systems. We propose performing resource allocation based on interference alignment (IA) in order to improve the spectral efficiency of CR systems without affecting the quality of service of the primary system. IA plays a...
This paper investigates the impact of different sounding bandwidths and center frequencies on power delay profile (PDP) at Terahertz (THz) band based on ray-tracing simulations. The effect of transmit power is also investigated for the center frequencies 300 GHz and 1500 GHz. This approach is based on complex frequency responses extracted for the Transmitter (Tx) and Receiver (Rx) pair, 10 m apart...
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