Maximum ratio combining of correlated Rayleigh fading channels with imperfect channel knowledge

Dietrich, F.A.; Utschick, Wolfgang

doi:10.1109/lcomm.2003.817299

Cited by 48 publications

(22 citation statements)

References 13 publications

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“…This approach is especially suited for resource-constrained devices, as the retransmission process is shifted to the more powerful BS. There, further reliability mechanisms, such as maximum ratio combining [16] or beamforming [17], could be included to strengthen the positive effects of cooperation.…”

Section: Discussionmentioning

confidence: 99%

Channel Coding versus Cooperative ARQ: Reducing Outage Probability in Ultra-Low Latency Wireless Communications

Serror

Dombrowski

Wehrle

et al. 2015

2015 IEEE Globecom Workshops (GC Wkshps)

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Abstract-Nowadays wireless communications still lack the ability to provide high reliability and low latency, although mission-critical applications, such as found in industrial automation, rely on both requirements. The main challenge is that an improved reliability often comes at the price of an increased latency. It has been shown that cooperative schemes can effectively increase the reliability by leveraging spatial diversity. However, an important question remains how to integrate cooperative schemes when dealing with very short latency bounds and especially how much time should be reserved for potential retransmissions. In this work, we propose and evaluate a centralized communication system that uses cooperative ARQ to achieve high reliability under the constraint of a strict latency bound of 1 ms. We evaluate this system analytically, using an outage-capacity model with average channel state information, by varying the reserved time for retransmissions, where a shorter time for retransmissions allows to apply stronger channel codes in the original transmission. As a baseline, we use a system without cooperation mechanism, thus applying the given time for stronger channel codes in the direct transmission of a message. In case of cooperation, a third station may act as a relay if the original transmission failed. Our results reveal that an optimal size of the reserved retransmission time exists around 15% to 30% of the total frame time, increasing the reliability by several orders of magnitude, even for a large number of transmissions within a communication cycle.

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Section: Discussionmentioning

confidence: 99%

Channel Coding versus Cooperative ARQ: Reducing Outage Probability in Ultra-Low Latency Wireless Communications

Serror

Dombrowski

Wehrle

et al. 2015

2015 IEEE Globecom Workshops (GC Wkshps)

View full text Add to dashboard Cite

show abstract

“…Following from [3] and [4] we assume that the receiver does not have perfect channel state information (CSI) and that a noisy channel estimateĥ is available. The channel estimate is obtained by maximum-likelihood (ML) channel estimation using a block of M pilot symbols a…”

Section: System Modelmentioning

confidence: 99%

“…In this section the bit error probability for BPSK is given from the derivation in [3] and the subsequent derivation in [4].…”

Section: Bit Error Probability For Imperfect Channel Knowledgementioning

confidence: 99%

“…accounting for distinct eigenvalues in the correlation matrix [3], and closely spaced or non-distinct eigenvalues [4]. In this paper, for the first time, both the physical characteristics of scatterer distributions and the antenna array inputs to the combiner, are related to the performance of MRC in typical scenarios.…”

Section: Introductionmentioning

confidence: 99%

“…In this contribution, the spatial correlation formulation in [5] is applied with MRC of BPSK modulation to typical antenna configurations for 4 to 6 receive antennas in two typical non-isotropic Rayleigh fading environments, and a Rayleigh isotropic scattering scenario where it is assumed that there is imperfect channel knowledge at the receiver using the results from [3] and [4]. This paper is organized as follows.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spatial Precoder Design Using Fixed Parameters of MIMO Channels

Lamahewa

Kennedy

Abhayapala

2005 Asia-Pacific Conference on Communications

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Abstract-New Results for the performance analysis of maximal ratio combining (MRC) using BPSK modulation in spatially correlated Rayleigh fading channels with imperfect channel knowledge are presented in terms of antenna array configuration and parameters of scatterer distributions. The utility of recently developed expressions for bit error probability is enhanced by application of a spatial correlation formulation for arbitrarily spaced antennas and general scatterer distributions. The results of performance analysis give valuable insight into the performance of MRC in realistic Rayleigh fading scenarios with imperfect channel state information for both isotropic and non-isotropic fading scenarios.

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Bit error probability of the M‐QAM scheme under η‐μ fading and impulsive noise in a communication system using spatial diversity

Silva

Alencar

Queiroz

et al. 2019

Int J Communication

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SummaryThis paper presents a new and exact expression for the bit error probability (BEP) of the square M‐ary quadrature amplitude modulation (M‐QAM) scheme, with the channel under double gated additive white Gaussian noise (G2AWGN) and η‐μ fading in a communication system using the spatial diversity technique. The expression for the BEP is written in terms of the Appell function. The BEP curves are presented under different values of the number of branches of the maximum ratio combining (MRC) receiver, order of the constellation M, and parameters that characterize mathematically the channel, corroborated by simulations performed with Monte Carlo method.

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Maximum ratio combining of correlated Rayleigh fading channels with imperfect channel knowledge

Cited by 48 publications

References 13 publications

Channel Coding versus Cooperative ARQ: Reducing Outage Probability in Ultra-Low Latency Wireless Communications

Channel Coding versus Cooperative ARQ: Reducing Outage Probability in Ultra-Low Latency Wireless Communications

Spatial Precoder Design Using Fixed Parameters of MIMO Channels

Bit error probability of the M‐QAM scheme under η‐μ fading and impulsive noise in a communication system using spatial diversity

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