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Cooperative transmission protocols based on decode-and-forward (DF) relaying and multiuser detection (MUD) for the wireless uplink transmission in synchronous CDMA systems are proposed in this paper on the condition that channel state information (CSI) is available at the destination, as well to the relays. In order to mitigate the multiple access interference (MAI) due to the usage of non-orthogonal...
In order to maximize the transmission throughput and quality of secondary users (SU) in an opportunistic spectrum access (OSA) systems operating under practical constraints of continuous collisions between the secondary and primary users (PU), we have studied the frame duration behavior and SU's detection frequency under difficult OSA interference and noise conditions. Having analyzed collisions from...
A modified blind MUD algorithm in the cooperation network is presented. By improving the subspace model and subspace tracking algorithm, it resolves the problem of fast matrix decomposition in the blind MUD algorithm. The paper analyzes convergence rate, anti-interference and algorithm complexity, and so on. The simulation results have been presented the modified algorithm can improve the convergence...
A unified system model for multirate multiple-input multiple-output (MIMO) multicarrier code division multiple access (MC-CDMA) systems is proposed in this paper. Based on the proposed unified system model, a novel space-frequency minimum mean-squared error based successive interference cancellation receiver (SF-MMSE/SIC) is developed and analyzed. The signal processing of this new detector is jointly...
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