Performance of BLAST over frequency-selective wireless communication channels

Boubaker, N.; Letaief, K.B.; Ross, D.M.

doi:10.1109/26.983316

Cited by 36 publications

(20 citation statements)

References 10 publications

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“…The former can be obtained by simulation [7], [8] or analytically, as presented recently in [9], [10]. For the latter, the complementary cumulative distribution function (CCDF) of the capacity (sometimes called capacity outage) was studied by Monte Carlo simulation in [2]- [4], and the mean capacity was derived in [11] for uncorrelated MIMO Rayleigh-fading channels.…”

mentioning

confidence: 99%

On the capacity of spatially correlated mimo rayleigh-fading channels

Chiani

Win

Zanella

2003

IEEE Trans. Inform. Theory

626

384

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Abstract-In this paper, we investigate the capacity distribution of spatially correlated, multiple-input-multiple-output (MIMO) channels. In particular, we derive a concise closed-form expression for the characteristic function (c.f.) of MIMO system capacity with arbitrary correlation among the transmitting antennas or among the receiving antennas in frequency-flat Rayleigh-fading environments. Using the exact expression of the c.f., the probability density function (pdf) and the cumulative distribution function (CDF) can be easily obtained, thus enabling the exact evaluation of the outage and mean capacity of spatially correlated MIMO channels. Our results are valid for scenarios with the number of transmitting antennas greater than or equal to that of receiving antennas with arbitrary correlation among them. Moreover, the results are valid for an arbitrary number of transmitting and receiving antennas in uncorrelated MIMO channels. It is shown that the capacity loss is negligible even with a correlation coefficient between two adjacent antennas as large as 0 5 for exponential correlation model. Finally, we derive an exact expression for the mean value of the capacity for arbitrary correlation matrices.

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mentioning

confidence: 99%

On the capacity of spatially correlated mimo rayleigh-fading channels

Chiani

Win

Zanella

2003

IEEE Trans. Inform. Theory

626

384

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“…Assuming a scenario of K active users, the demodulated symbols in the m-th channel rm can be denoted by a column vector with a dimension of destined signal (2) MI & ISI where CjT is the equivalent spreading code matrix after and nn is an AWGN column vector with dimension of BN + (X -1 ) A + L -1 observed at the receiver. Without loss of generation, we discuss the decision of the pth data from the q-th transmit antenna b4'q.…”

Section: B Channel Model and Receivermentioning

confidence: 99%

“…When combined with CDMA techniques, MIMO systems can fully exploit spatial and temporal diversity of mobile radio channels and thus improve the performance significantly [1]. However, in frequency-selective fading channel conditions, such MIMO-CDMA systems suffer from inter-symbol-interference (ISI), multi-access interference (MAI), spatial interference (SPI), etc., hence the performances would degrade badly [2]. It is thus very important for MIMO-CDMA systems to suppress the interferences caused by multipath propagation effect.…”

Section: Introductionmentioning

confidence: 99%

An Interference-free MIMO-CDMA system Spread with Orthogonal Complementary Code for Multipath Fading Scenarios

Huang

Zhu

2006

2006 International Conference on Communications, Circuits and Systems

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To overcome the problem that the performance of traditional MIMO-CDMA system would degrade badly in frequency-selective fading channel conditions, a novel interference-free MIMO-CDMA system spread with Orthogonal Complementary(OC) code is proposed in the paper. The system utilizes a novel transmitter structure, which combines OC code spreading and spatial delay multiplexing technique. Therefore, only simple correlation operation is needed at the receiver to effectively resist interferences caused by multipath propagation effect, and maximum-ratio-combination (MRC) can be employed to further resist channel fading. The proposed system provides higer BER performance and lower hardware complexity, compared with traditional MIMO-CDMA system employing singlecode spreading and VBLAST scheme. Mathematical expressions and theoretical analysis of the system are presented. Simulation results validate the perfect anti-interference properties of the proposed system.

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“…The analysis of the capacity of MIMO system was investigated in [2], [3]. The performance evaluation of MIMO system in terms of error probability was studied in [4]. The average capacity of MIMO system, and the outage capacity of MIMO system was studied in [1] - [3] using Monte Carlo simulation , and the average capacity for uncorrelated MIMO Rayleigh fading channel was derived in [5].…”

Section: Introductionmentioning

confidence: 99%

Capacity Analysis of MIMO System Over Identically Independent Distributed Weibull Fading Channels

Abualhaol

Matalgah

2007

2007 IEEE International Conference on Communications

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The capacity of multiple input multiple output (MIMO) system over wireless channels has been investigated analytically and by simulation over different types of wireless fading channels, such as Rayleigh and Nakagami-m fading channels. The capacity of MIMO system over Weibull fading channels has not been considered in the literature before because of the complexity in obtaining closed form expressions for either the probability of outage capacity or the average capacity. In this paper, Finite Mixture (FM) with Expectation-Maximization (EM) algorithm is utilized to derive simple approximate expression for the probability density function (pdf) of the capacity distribution over identically independent distributed (iid) Weibull fading channels. This approximation converts the complicated capacity distribution to a simple weighted sum of univariate normal distributions with appropriate weighting coefficients, means, and variances for a predefined system model and channel statistics. The resultant approximation simplifies the mathematical analysis of the average capacity and the outage capacity in terms of well known Q-functions.

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Performance of BLAST over frequency-selective wireless communication channels

Cited by 36 publications

References 10 publications

On the capacity of spatially correlated mimo rayleigh-fading channels

On the capacity of spatially correlated mimo rayleigh-fading channels

An Interference-free MIMO-CDMA system Spread with Orthogonal Complementary Code for Multipath Fading Scenarios

Capacity Analysis of MIMO System Over Identically Independent Distributed Weibull Fading Channels

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