Robust MMSE Precoding for the MIMO Complex Gaussian Broadcast Channel

Duplicy, Jonathan; Vandendorpe, Luc

doi:10.1109/icassp.2007.366562

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…, we have to numerically solve (11)- (13). This numerical approach may be computationally quite expensive due to the matrix inversions involved in (11).…”

Section: Power Allocation With Perfect Csimentioning

confidence: 99%

“…The receiver noise at the FC and the limited available power means that the channel estimation always incurs some estimation error. Consequently, the design of power allocation schemes should also take into account the channel estimation errors [13], [14]. Herein, first we design the power allocation scheme assuming perfect knowledge of the channel state information (CSI) and subsequently we extend the design to the case of imperfect CSI.…”

Section: Introductionmentioning

confidence: 99%

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Power-efficient estimation in sensor networks with correlated data: Perfect and imperfect CSI

Chaudhary

Vandendorpe

2010

2010 48th Annual Allerton Conference on Communication, Control, and Computing (Allerton)

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This paper considers power allocation problem in wireless sensor networks where distributed sensors amplify and forward their observations of a Gaussian random source to a remote fusion center (FC) which reconstructs the underlying source. The sensor networks are characterized by the availability of limited energy. Motivated by this fact, we design a power allocation scheme where our objective is to minimize the network power consumption such that the reconstruction distortion does not exceed a target value. The reconstruction distortion is quantified based on linear minimum mean-squared error (LMMSE) estimation rule. For power allocation, we propose a novel design based on successive approximation of the distortion function. The resulting algorithm turns out to be simple, computationally efficient and exhibits good convergence properties. The design is based on perfect knowledge of fading channel gains. We also address the case where only estimates of the channel gains are available. The simulation examples illustrate that the proposed design holds considerable performance gain compared to a uniform power allocation scheme.

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“…, we have to numerically solve (11)- (13). This numerical approach may be computationally quite expensive due to the matrix inversions involved in (11).…”

Section: Power Allocation With Perfect Csimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%