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The authors pay focus on the K user multiple-input multiple-output(MIMO) Gaussian interference channel(IC) with M transmitting antennas and N receiving antennas, in which min(M, N)/max(M, N)≧(K-1)/[K(K-2)] and K >3. The channel coefficients are variable, time varying or frequency selectively drawn from a continuous distribution. Based on ergodic interference alignment(IA), an achievable scheme was proposed to achieve a total of KMN/(M +N) degrees of freedom(DoF). The ergodic IA scheme can reach the optimal Do F value with simply linear beamforming and finite symbols. Furthermore, the achievable rate of the ergodic IA scheme was derived at any signal-to-noise ratio(SNR). With numerical simulation, the performance of the proposed scheme is evaluated.
The authors pay focus on the K user multiple-input multiple-output (MIMO) Gaussian interference channel (IC) with M transmitting antennas and N receiving antennas, where min (M, N) / max Based on ergodic interference alignment (IA), an achievable scheme was proposed to achieve (1) / K (K-2)] and K> 3. The channel coefficients are variable, time varying or frequency only drawn from a continuous distribution The total number of KMN / (M + N) degrees of freedom (DoF). The ergodic IA scheme can reach the optimal Do F value with simply linear beamforming and finite symbols. Furthermore, the achievable rate of the ergodic IA scheme was derived at any signal-to-noise ratio (SNR). With numerical simulation, the performance of the proposed scheme is evaluated.