Source–Channel Diversity for Parallel Channels

Laneman, J. Nicholas; Martinian, E.; Wornell, Gregory W.; Apostolopoulos, John

doi:10.1109/tit.2005.855578

Cited by 125 publications

(121 citation statements)

References 57 publications

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“…The MDC-JD scheme was proposed in [4] and is illustrated in in Figure 2. For the source coding part, the MDC-JD scheme employs the EGC quantizer.…”

Section: A MDC With Joint Decoding (Mdc-jd)mentioning

confidence: 99%

“…To allow for graceful degradation of the source reconstruction quality, several source coding techniques have been proposed in the application layer, including MDC [2] and SR [3]. To simultaneously address the channel uncertainty issue and the source reconstruction issue, we consider layered sourcechannel coding schemes, which have been recently proposed and studied (see [4], [5] and references therein). As the first step, we study two doublelayer source-channel coding schemes, which rely on the MDC technique [4] and the SR technique, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…To simultaneously address the channel uncertainty issue and the source reconstruction issue, we consider layered sourcechannel coding schemes, which have been recently proposed and studied (see [4], [5] and references therein). As the first step, we study two doublelayer source-channel coding schemes, which rely on the MDC technique [4] and the SR technique, respectively. We characterize the performance of each scheme through the achievable distortion distribution.…”

Section: Introductionmentioning

confidence: 99%

“…Particularly, in the high resolution regime of the source and equivalently the high SNR regime of the channel, the distortion distribution can be cast as a tradeoff between the distortion exponent and the diversity order. Unlike the commonly adopted average distortion performance metric in [4], our proposed distortion-diversity perspective provides a more detailed performance comparison between various source-channel coding approaches in different operation regions.…”

Section: Introductionmentioning

confidence: 99%

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Layered source-channel coding: A distortion-diversity perspective

Sheng

Zheng

Médard

2008

2008 Information Theory and Applications Workshop

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Abstract-Source-channel coding in time-varying channels without perfect side information at the transmitter suffers from uncertainty which may not always be averaged out. In channel coding, a main approach to address such uncertainty has been the outage formulation. In source coding, the main approaches to deal with such uncertainty have been multiple description coding (MDC) and successive refinement (SR). In this paper, we consider layered source-channel coding schemes relying on the MDC technique, originally proposed by Laneman et al, and the SR technique. We introduce the concept of distortion-diversity tradeoff, akin to the rate-diversity tradeoff, to consider the performance of these schemes. Our distortion-diversity perspective sheds some light on the performance comparison between various source-channel coding approaches in different operation regions.

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“…The MDC-JD scheme was proposed in [4] and is illustrated in in Figure 2. For the source coding part, the MDC-JD scheme employs the EGC quantizer.…”

Section: A MDC With Joint Decoding (Mdc-jd)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Layered source-channel coding: A distortion-diversity perspective

Sheng

Zheng

Médard

2008

2008 Information Theory and Applications Workshop

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“…Due to the unavailability of full CSIT in our framework, our model is better suited to the case of multicarrier OFDM systems, with M parallel subchannels located at nonadjacent carrier frequencies. The concept of parallel channels also extends to multiple transmission time-slots [16] and diversity available through cooperative communications such as multiple relays etc. Our results in this article are applicable to all these scenarios.…”

Section: Introductionmentioning

confidence: 99%

Outage minimization for parallel fading channels with limited feedback

Dey

2012

J Wireless Com Network

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We address an optimal power allocation problem for minimizing the outage probability for M parallel block-Nakagami-fading channels under a long-term average sum transmit power constraint with finite rate feedback of channel state information (CSI). A simulation-based optimization technique called simultaneous perturbation stochastic approximation algorithm (SPSA) is employed first to numerically derive a locally optimal power codebook. Due to the high computational complexity and long convergence time of SPSA, we make an ordering assumption on the power codebook entries and derive effective hyperplane based approximations to the channel quantization regions and present a number of low-complexity suboptimal quantized power codebook design algorithms. Unlike existing work on outage minimization for multiple-input multiple-output (MIMO) channels with limited feedback, we do not assume that identical transmission power is used for all channels within each channel quantization region. We also do not resort to a Gaussian approximation for the instantaneous mutual information in general as used in many existing work. Based on our power ordering assumption and hyperplane based approximations, we show that allocating identical power to all channels within a given channel quantization region in the limited feedback scenario is asymptotically optimal only at high average power (or average signal-to-noise ratio (SNR)) for the Rayleigh fading case, whereas for the general Nakagami case, the transmit power allocation for an individual channel within each quantized region is asymptotically proportional to the corresponding Nakagami fading parameter (severity of fading). We also present a novel diversity order result for the outage probability for the Nakagami fading case. Finally, we derive a suitable Gaussian approximation based low-complexity power allocation scheme for a large number of parallel channels, which has important applications in wideband slow-fading orthogonal frequency-division multiplexing (OFDM) systems. Extensive numerical results illustrate that only a few bits of feedback close the gap substantially in outage performance between the limited feedback case and the full instantaneous CSI at the transmitter case.

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3D Video over Networks

Lai

Kwasinski

et al. 2012

3D Visual Communications

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Source–Channel Diversity for Parallel Channels

Cited by 125 publications

References 57 publications

Layered source-channel coding: A distortion-diversity perspective

Layered source-channel coding: A distortion-diversity perspective

Outage minimization for parallel fading channels with limited feedback

3D Video over Networks

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