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In this paper, two novel joint relay-and-antenna strategies are proposed and analyzed for multi- relay two-way multiple-input multiple-output (MIMO) decode-forward (DF) networks, namely, joint OR-TAS(Opportunistic Relaying -Transmit Antenna Selection) and joint SC-TAS (Selection Cooperation-Transmit Antenna Selection). For each joint selection scheme, the best transmit antenna at the two sources,...
In this paper, we study the performance of fixed decode-and-forward (DF) two-way relay cooperative networks with multi-antenna sources employing limited feedback beamforming (LFBF) for signal transmission. The closed-form expressions for the overall outage probability and sum symbol error rate (SSER) are derived using the moment generation function (MGF) of the signal- to-noise-ratio (SNR) at the...
In this letter, we propose a low-complexity transceiver design for multiple-input multiple-output (MIMO) broadcast systems based on channel inversion, QR decomposition, and successive interference cancellation technique. Furthermore, an effective power loading scheme is developed to optimize the bit error rate (BER) performance. Analytical and simulation results show that the proposed design can achieve...
Some recent studies have focused on the performance of multi-antenna relay systems assuming that perfect channel state information at the transmitter(CSIT) or no CSIT of relay-destination link are available. However, there is still a lack of research on the performance of fixed relay networks with finite feedbacks. In this paper, we present the closed-form expression of outage probability for decode-and-forward...
It has been well known that cooperative transmission provides a new scheme to implement MIMO spatial diversity and multiplexing in wireless networks, thus tradeoff between cooperative spatial diversity and multiplexing becomes a very important issue. In this paper, we propose to analyze the system delay behavior considering the difference between spatial diversity and multiplexing, in viewpoint of...
In time-division duplex (TDD) system, precoding matrix for downlink transmission can be obtained from estimation of uplink pilots by using reciprocity. However, if the channel is time-varying, the channel difference would cause codeword mismatch between transmitter and receiver, which leads to performance degradation. In this paper, a codebook based precoding scheme is proposed for TDD systems to...
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