Blind source separation of instantaneous MIMO systems based on the least-squares Constant Modulus Algorithm

Sansrimahachai, P.; Ward, D.B.; Constantinides, A.G.

doi:10.1049/ip-vis:20045053

Cited by 10 publications

(5 citation statements)

References 20 publications

(20 reference statements)

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“…The proposed robust constrained LSCMA is globally stable and convergent via Agee's inequalities. The first input stream is successfully extracted by establishing the following inequalities, given that > 0 [21]:…”

Section: Convergence Performancementioning

confidence: 99%

Doubly Constrained Robust Blind Beamforming Algorithm

Song

Ren

2013

Journal of Applied Mathematics

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We propose doubly constrained robust least-squares constant modulus algorithm (LSCMA) to solve the problem of signal steering vector mismatches via the Bayesian method and worst-case performance optimization, which is based on the mismatches between the actual and presumed steering vectors. The weight vector is iteratively updated with penalty for the worst-case signal steering vector by the partial Taylor-series expansion and Lagrange multiplier method, in which the Lagrange multipliers can be optimally derived and incorporated at each step. A theoretical analysis for our proposed algorithm in terms of complexity cost, convergence performance, and SINR performance is presented in this paper. In contrast to the linearly constrained LSCMA, the proposed algorithm provides better robustness against the signal steering vector mismatches, yields higher signal captive performance, improves greater array output SINR, and has a lower computational cost. The simulation results confirm the superiority of the proposed algorithm on beampattern control and output SINR enhancement.

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Section: Convergence Performancementioning

confidence: 99%

Doubly Constrained Robust Blind Beamforming Algorithm

Song

Ren

2013

Journal of Applied Mathematics

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“…The independent component analysis (ICA) algorithms make use of the independence of different users' signals to achieve signal recovery [9,10]. ILSP and ILSE exploit the finite alphabet property to estimate signals while CM-based algorithms are effective to constant-module modulated signals [11][12][13][14]. Other properties of transmitted signals, such as cyclestationarity and high-order statistics, have also been used to separate sources in many cases.…”

Section: Introductionmentioning

confidence: 99%

Space-Time Blind Multiuser Detection for Multiuser DS-CDMA and Oversampled Systems

Liu

Zong-ze

Lei

2010

Wireless Pers Commun

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Novel space-time blind multiuser detection method for multiuser DS-CDMA and oversampled systems is presented. To achieve signal recovery, Khatri-Rao product structure of the space-time channel matrix of received signals and rank-1 projection strategy are exploited. Two blind signal detection algorithms based on Khatri-Rao product decomposition are proposed. Uniqueness of the Khatri-Rao decomposition is discussed. Simulation results show that the proposed algorithms have performance close to the non-blind Zero Forcing algorithm and still work well in the case of only few antennae in the receiving end.

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“…It is applied in the blind source separation [4], array processing, equalization and multiuser detection widely.…”

Section: ⅰIntroductionmentioning

confidence: 99%

An Improved LSCM Algorithm for Blind Multiuser Detection in AWGN CDMA Channels

Liu

Zhu

Pan

et al. 2007

2007 International Conference on Wireless Communications, Networking and Mobile Computing

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In this letter, we combine the LSCMA(Least Square Constant Modulus Algorithm) with the subspace approach and present a LSCM_SUB blind adaptive multiuser detection in AWGN CDMA channels. The poor performance of LSCMA in the low SNR will be improved by the LSCM_SUB algorithm. The performance of the proposed LSCM_SUB algorithm is compared with that of LSCMA. Simulation results show that the LSCM_SUB algorithm is superior to the LSCMA especially in the low SNR.

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Blind source separation of instantaneous MIMO systems based on the least-squares Constant Modulus Algorithm

Cited by 10 publications

References 20 publications

Doubly Constrained Robust Blind Beamforming Algorithm

Doubly Constrained Robust Blind Beamforming Algorithm

Space-Time Blind Multiuser Detection for Multiuser DS-CDMA and Oversampled Systems

An Improved LSCM Algorithm for Blind Multiuser Detection in AWGN CDMA Channels

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