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In this paper, we propose a practical interference alignment technique based on an opportunistic user selection in a three-user 2 ×2 MIMO interference channel where no information is allowed to be shared among transmitters. In the proposed scheme, the user whose interference signals from other transmitters are most aligned with each other is selected at each transmitter. We also investigate optimal...
The capacity of feedback links is typically limited and shared by multiple users. So this paper studies the impacts on multiple input multiple output (MIMO) broadcast channel (BC) when limited feedback capacity is shared among multiple users. Our mathematical analysis proves that in the high signal-to-noise ration (SNR) region, allocating the whole feedback capacity to a single user is the optimal...
802.11n MIMO system should be built upon 802.11a SISO system. This paper suggests simple way to implement 802.11a backward compatible transmitter diversity using multiple antennas in an 802.11a/802.11n device. This paper also presents the method of antennas selection and shows the improved results of simulation. In transmitter, the channel state information (CSI) can be measured by using preamble...
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