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The multi-antenna system can significantly increase the spectral efficiency of wireless systems. This paper proposes a novel low complexity preprocessing scheme for multiuser multiple-input multiple-output (MU-MIMO) system. The proposed precoding algorithm decomposes the composite downlink channel into the multiple sub-channels without inter-user interference and has lower cost than traditional algorithms...
A novel diversity-multiplexing decision switched algorithm is proposed for multiple-input multiple-output (MIMO) system based on variable-rate MQAM. The proposed scheme is a closed-loop system, achieves adaptive bit and power allocation according to real-time channel state information (CSI), and the tradeoff between the diversity and multiplexing gains that can simultaneously achieved over a low-rate...
A novel switched scheme is proposed for diversity-multiplexing switched multiple-input multiple-output (D-M MIMO) system under Raleigh fading based on bit error rate (BER). The proposed scheme is a closed-loop multiple antenna system, and the tradeoff between the diversity and multiplexing gains that can be simultaneously achieved over a low-rate limited feedback channel. Furthermore, based on the...
We present a new receiver structure able to deliver high data rates in a multi-input-multi-output (MIMO) frequency selective wireless environment. The parallel interference cancellation MIMO decision feedback equalization based on recursive least square algorithm (RLS-PIC-DFE) is obtained by canceling decided symbols from the received symbols parallel with the decision feed-forward equalizer (DFE)...
Multiple input multiple output (MIMO) systems are considered as potential candidates for future high data rates wireless networks. However these systems present a practical problem which is the cost of hardware related to every additional antenna. In this paper, we present an effective suboptimal antenna algorithm based on frame error rate for MIMO systems. It only needs a sorted QR decomposition...
This paper proposes a new switched criterion based on minimum error rate for multiple-input multiple-output (MIMO) systems. The proposed scheme is a closed-loop MIMO system, and the tradeoff between the diversity and multiplexing gains that can simultaneously achieved over a low-rate feedback channel with limited bits. Based on this criterion, a low complexity decision algorithm is proposed. The proposed...
A parallel MIMO detection algorithm (HPD) based on Householder transformation is proposed to improve the high bit error performance when the sorted QR decomposition detection algorithm (SQRD) is detected in Rayleigh slow fading channel. It transforms the channel matrix columns orthogonally based on Householder transformation to avoid solving the upper triangular matrix and sorts the channel matrix...
We present a new receiver structure able to deliver high data rates in a multi-input-multi-output (MIMO) frequency selective wireless environment. The new algorithm is obtained by canceling interference from the received symbols successively with the decision feed-forward equalizer (DFE) solution as a well known expression encountered in fast recursive least squares (RLS) adaptive algorithms, and...
Selective mapping algorithm is proposed to reduce the peak-to-average power ration (PAPR) in MIMO-OFDM system. It is proved that the conjugate symbols on two antennas have the same PAPR property with orthogonal space-time block coded (STBC). By using the characteristic, the computational complexity cost and the side information (SI) is significantly reduced compared with the concurrent SLM algorithm...
In this paper, a novel antenna selection algorithm based on complex Householder QR factorization is proposed in wireless multiple input multiple output (MIMO) systems. It avoids the shortcoming of previous methods which need a mass of search over all possible subsets, has lower computation complexity and better performance. Simulation results demonstrate that the proposed antenna selection algorithm...
A fast square-root detection algorithm for V-BLAST is proposed to improve the high complexities when conventional square-root detection algorithm detects in MIMO receivers. It simplifies the computing process of conventional square-root detection algorithm and proposes a parallel processing algorithm of decided signal's feedback and received signal's interference cancellation. The detection complexities...
The deployment of multiple antennas at the receiver or transmitter will increase the complexity and thus the cost of the communication systems. To design an MIMO system with a reasonable complexity is a challenge. Antenna selection is a very attractive technique in this field. In this paper, we investigate the outage performance of the TAS/MRC scheme over correlated Nakagami fading channels. An outage...
The deployment of multiple antennas at the receiver or transmitter will increase the complexity and thus the cost of the communication systems. To design an MIMO system with a reasonable complexity is a challenging task. Antenna selection is a very attractive technique in this field. In this paper, we investigate the outage performance of the transmitter antenna selection/receiver MRC scheme over...
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