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A new scheme for transmit antenna selection (TAS) is proposed to reduce the overhead for pilot symbols and feedback signaling. The proposed scheme considers a subset of all antennas in each slot and changes the subset in each following slot. In this way, the overhead can be reduced significantly. Simulation results also show that the performance of the proposed scheme is almost the same as the traditional...
According to the number of successful decoded relay nodes with good destination-to-relay and relay-to-destination link qualities, a simple adaptive relay selection algorithm and its corresponding protocol is presented to achieve a good diversity and multiplexing gains. When the antenna number of the destination is less than the number of successful decoded relay nodes, the opportunistic relay selection...
In this paper, we investigate the location optimization for decode-and-forward (DF) opportunistic cooperative networks, in which the impact of the availability of the direct link between the source and the destination has been studied. Under Rayleigh fading channels, the closed-form solution for the optimal location is derived. It is interesting to find that the optimal relay location is related to...
In this paper, we present a novel spatial diversity technique which uses only one antenna element. For the static or quasi-static rich scattering environments, significant diversity gain can be attained by simply moving the antenna element around a certain geographical area. Such diversity gain is conventionally obtained by multiple fixed antennas. The proposed method can greatly reduce the implementation...
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