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This paper presents the BER performance analyses of a virtual MIMO half-duplex relay system on a WiMAX OFDMA network with Alamouti coding. For such a condition where multi-antenna relay is not an option, employing multiple single-antenna relays in the system would be an alternative to still benefit the diversity gain. The impact of increasing the number of relay nodes to the system performance is...
In this paper, we investigate the impact of antenna spatial correlation on the performance of K-user MIMO interference channel, in which interference alignment technique is employed to align all interferences at receivers. In order to improve the sum-rate and BER performances of the system in low SNR regimes the MMSE-based interference alignment algorithm is deployed. This paper considers a multiuser...
This paper presents the BER performance analysis of a MIMO multi-user relay network. A single relay is employed to assist the transmission between the base station and the mobile station at the cell edge of two neighbouring cells. The relay applies the linear precoding technique, namely, block diagonalization and interference alignment to suppress the interference, and afterwards to forward the signal...
The effects of carrier frequency, antenna height and season on a broadband wireless access (BWA) system deployed in a rural area at 825 MHz and 3535 MHz are studied in this paper. With the aid of digital terrain information, both large scale and small scale fading effects present in the rural channel are discussed. Our investigation found that the frequency dependence of a wireless channel varies...
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