Performance analysis for V‐BLAST system using OSIC receiver in correlated channel

SUMMARYA new detection algorithm based on the jointly Gaussian approach (JGA) and successive interference cancelation (SIC), named the SIC-JGA algorithm, is proposed for iterative MIMO systems. Both the a priori symbol estimates of the undetected layers and the a posteriori symbol estimates of the previously detected layers are used in the SIC process. To reduce the complexity of covariance matrix inversion in the proposed algorithm, simplified algorithms named S-SIC-JGA are investigated for both the single path and multipath block fading channels under M Phase Shift Keying modulations. A detailed complexity analysis is presented for both the SIC-JGA and S-SIC-JGA algorithms. Numerical results exhibit that the system using the SIC-JGA algorithm outperforms the JGA algorithm, with an additional complexity for determining the detection order of SIC. The S-SIC-JGA algorithm has a much lower complexity compared with the SIC-JGA algorithm while experiencing an acceptable system performance degradation. Proper detection algorithms can be chosen in different iterations to balance the system performance and the detection complexity.

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“…If the order is determined more carefully, the detection performance will be improved while the complexity will increase [29].…”

Section: Sic-jga Algorithm For Mimo Detectionmentioning

confidence: 98%

New detection algorithms based on the jointly Gaussian approach and successive interference cancelation for iterative MIMO systems

Zhong

Zhao

et al. 2012

Int J Communication

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“…Clearly, we obtain the mappings Compared with the complex model of (2), this real signal model is for the pulse amplitude modulated (PAM) symbols transmitted with additive real Gaussian noise of variance 2 =2. Each entry of b s.k/ is now with average power 1/2.…”

Section: Lemmamentioning

confidence: 99%

“…Each entry of b s.k/ is now with average power 1/2. In the following, we refer to the detection scheme that relies on the complex model of (2) to recover the QAM vector s.k/ as the complex detector and refer to the detection scheme on (13) to recover the PAM vectorb s.k/ as the real detector.…”

Section: Lemmamentioning

confidence: 99%

“…The 4-QAM signals are transmitted over independent identically Rayleigh fading channels with four antennas deployed at either the transmitter or receiver side. Typically, the detection order implicitly used in (2) or (25) is not related to the channel information; such detection order does not lead the MMSE-SIC detector to yield good BER performance. Here, for the complex detector, we consider four practical detection ordering criteria that rely on the channel information.…”

Section: Lemmamentioning

confidence: 99%

“…The Vertical Bell Labs Layered Space‐Time (V‐BLAST) or spatially multiplexed multiple‐input and multiple‐output (MIMO) system is considered in this paper. The complex MIMO signal model is widely used for developing complex MIMO detection algorithms and for studying the analytical bit error rate (BER) performance of the detection schemes.…”

Section: Introductionmentioning

confidence: 99%

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On fast preprocessing schemes for the real‐valued spatially multiplexed MIMO detectors

Liu¹,

Chiu²

2012

Int J Communication

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SUMMARYMultiple‐input and multiple‐output detectors may rely on the complex and real signal models, yielding complex detectors for quadrature amplitude modulated signals and real detectors for pulse amplitude modulated signals, respectively. It is well‐known that the complex and real maximum likelihood detectors are equivalent. But relying on both the conventional real and pairwise real models, we show in this paper that some of the suboptimal real detectors are equivalent to their counterpart complex detectors, whereas some are not. The equivalence between the complex and pairwise real detectors also leads us to develop fast preprocessing algorithms for the real ordered successive interference cancelation and tree search detectors. Finally, we show that the preprocessing computations required by the equivalent suboptimal complex and pairwise real detectors are of the same complexity. When some practical preprocessing criteria are used, the real detectors may not detect the PAM signals in the pairwise manner. Such non‐pairwise real detectors outperform their counterpart complex detectors at the cost of higher preprocessing complexity. Copyright © 2012 John Wiley & Sons, Ltd.

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Nearly optimal linear transceiver design for amplify‐and‐forward MIMO multiple‐relay systems under MMSE criterion

Huang

Zhang

et al. 2012

Int J Communication

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SUMMARYIn this paper, we consider amplify‐and‐forward multiple‐input multiple‐output multiple‐relay systems, where all the nodes have multiple antennas. For enhancing link reliability, we address the problem of designing optimal linear transceiver to minimize the mean squared error (MSE) of symbol estimations subject to the total relay transmit power constraint. This problem is highly complex and has not been solved in the literature. We first simplify this optimization problem to one that takes a singular value vector and a unitary matrix as optimization variables. Then based on the analyses for the simplified problem, we develop an iterative algorithm consisting of one boundary optimization and one unitary matrix constrained optimization. We show analytically that the proposed iterative algorithm always converges, and the MSE is monotonically decreasing from one iteration to the next. Finally, numerical results demonstrate the nearly optimal performance of the proposed scheme. Copyright © 2012 John Wiley & Sons, Ltd.

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Performance analysis for V‐BLAST system using OSIC receiver in correlated channel

Cited by 6 publications

References 17 publications

New detection algorithms based on the jointly Gaussian approach and successive interference cancelation for iterative MIMO systems

New detection algorithms based on the jointly Gaussian approach and successive interference cancelation for iterative MIMO systems

On fast preprocessing schemes for the real‐valued spatially multiplexed MIMO detectors

Nearly optimal linear transceiver design for amplify‐and‐forward MIMO multiple‐relay systems under MMSE criterion

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