On the capacity of doubly correlated MIMO channels

Abstract-In most wireless communications research, the channel models considered experience less severe fading than the classic Rayleigh fading case. In this work, however, we investigate MIMO channels where the fading is more severe. In these environments, we show that the coefficient of variation of the channel amplitudes is a good predictor of the link mutual information, for a variety of models. We propose a novel channel model for severely fading channels based on the complex multivariate t distribution. For this model, we are able to compute exact results for the ergodic mutual information and approximations to the outage probabilities for the mutual information. Applications of this work include wireless sensors, RF tagging, land-mobile, indoor-mobile, ground-penetrating radar, and ionospheric radio links. Finally, we point out that the methodology can also be extended to evaluate the mutual information of a cellular MIMO link and the performance of various MIMO receivers in a cellular scenario. In these cellular applications, the channel itself is not severely fading but the multivariate t distribution can be applied to model the effects of inter-cell interference.

show abstract

“…where we have used the pdf for λ given in [11] and n = max(n R , n T ). Hence, f X (x) is evaluated as…”

Section: B Mutual Informationmentioning

confidence: 99%

Severely Fading MIMO Channels: Models and Mutual Information

Choi

Smith

Allen

et al. 2007

2007 IEEE International Conference on Communications

View full text Add to dashboard Cite

show abstract

“…As an alternative to simulations of the models, one might consider obtaining the associated OCs using analytical formulas, e.g., as derived in [36]. However, the simulation approach was chosen, as it seemed simpler in practice and not all types of models are covered by the work in [36].…”

Section: Channel Modelsmentioning

confidence: 99%

Channel models for capacity evaluation of MIMO handsets in data mode

Nielsen

Yanakiev²,

Barrio

et al. 2017

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

This work investigates different correlation based models useful for evaluation of outage capacity (OC) of mobile multiple-input multiple-output (MIMO) handsets. The work is based on a large measurement campaign in a micro-cellular setup involving two dual-band base stations, 10 different handsets in an indoor environment for different use cases and test users. Several models are evaluated statistically, comparing the OC values estimated from the model and measurement data, respectively, for about 2,700 measurement routes. The models are based on either estimates of the full correlation matrices or simplifications. Among other results, it is shown that the OC can be predicted accurately (median error typically within 2.6%) with a model assuming knowledge only of the Tx-correlation coefficient and the mean power gain.

show abstract

“…and using the results in [9,10], the density function, f (λ) is given in the following theorem. Note that although the theorem assumes n m < 2l, all other cases can be handled but are omitted for space reasons.…”

Section: Capacity Analysismentioning

confidence: 99%

“…th minor of Q with elements given in (9) and A λ (i, j) is given in (10). The proof of the theorem is in Appendix A.…”

Section: Capacity Analysismentioning

confidence: 99%

See 1 more Smart Citation

Capacity analysis for MIMO two-hop two-relay amplify-and-forward relaying systems

Firag

Smith

2008

2008 International Symposium on Information Theory and Its Applications

View full text Add to dashboard Cite

This paper presents an ergodic capacity analysis of an amplify-and-forward (AF) multiple-input, multipleoutput (MIMO) two-hop, two relay system. We first derive an expression for the probability density function of an arbitrary eigenvalue of the system. Then, using this result, a closed form expression for the ergodic capacity of the system is derived. We present simulation results to validate our analysis. We also show that the results for a single relay system can be obtained as a special case.

show abstract

On the capacity of doubly correlated MIMO channels

Cited by 170 publications

References 24 publications

Severely Fading MIMO Channels: Models and Mutual Information

Severely Fading MIMO Channels: Models and Mutual Information

Channel models for capacity evaluation of MIMO handsets in data mode

Capacity analysis for MIMO two-hop two-relay amplify-and-forward relaying systems

Contact Info

Product

Resources

About