Multi-layer broadcasting hybrid-ARQ strategies for block fading channels

Steiner, Avi; Shamai, Shlomo

doi:10.1109/twc.2008.070002

Cited by 33 publications

(61 citation statements)

References 17 publications

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“…Furthermore, since the proposed scheme is a generalization to that in [16] and [18], it promises further gain from the throughput performance obtained in [16,18].…”

Section: Discussionmentioning

confidence: 99%

“…Several multi-bit feedback INR-ARQ schemes have been proposed in the literature. In [16,17], a multi-bit feedback INR-ARQ scheme was proposed for convolutional codes, while in [18] a multi-layer broadcasting strategy with multi-bit feedback was shown to improve the throughput performance of INR-ARQ transmission. There is, however, no unified approach for designing multi-bit feedback INR-ARQ transmission.…”

Section: Introductionmentioning

confidence: 99%

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MIMO ARQ With Multibit Feedback: Outage Analysis

Nguyen

Rasmussen

Fàbregas

et al. 2012

IEEE Trans. Inform. Theory

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We study the asymptotic outage performance of incremental redundancy automatic repeat request (INR-ARQ) transmission over the multiple-input multiple-output (MIMO) block-fading channels with discrete input constellations. We first show that transmission with random codes using a discrete signal constellation across all transmit antennas achieves the optimal outage diversity given by the Singleton bound. We then analyze the optimal SNR-exponent and outage diversity of INR-ARQ transmission over the MIMO block-fading channel. We show that a significant gain in outage diversity is obtained by providing more than one bit feedback at each ARQ round.Thus, the outage performance of INR-ARQ transmission can be remarkably improved with minimal additional overhead. A suboptimal feedback and power adaptation rule, which achieves the optimal outage diversity, is proposed for MIMO INR-ARQ, demonstrating the benefits provided by multi-bit feedback.

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“…Furthermore, since the proposed scheme is a generalization to that in [16] and [18], it promises further gain from the throughput performance obtained in [16,18].…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

MIMO ARQ With Multibit Feedback: Outage Analysis

Nguyen

Rasmussen

Fàbregas

et al. 2012

IEEE Trans. Inform. Theory

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show abstract

“…provided through the feedback link regarding the status of the current transmission. Such multi-bit feedback is proposed in [3,4] for INR-ARQ systems based on convolutional codes, and in [5] to improve the performance of INR-ARQ systems in a multi-layer broadcasting strategy. In this paper, we consider the outage performance of multi-bit feedback INR-ARQ transmission over the MIMO block-fading channel.…”

Section: Introductionmentioning

confidence: 99%

MIMO ARQ Systems with multi-Level feedback

Nguyen

Rasmussen

Fàbregas

et al. 2009

2009 IEEE International Symposium on Information Theory

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We consider improving the outage performance of incremental-redundancy automatic repeat request (INR-ARQ) transmission over the multiple-input multiple-output (MIMO) block-fading channel by allowing multi-bit receiver feedback. We show that multi-bit feedback offers significant gain in outage diversity when power adaptation is employed. A suboptimal feedback and power adaptation rule is proposed, illustrating the benefits provided by multi-bit feedback.

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“…Another problem which arises from throughput optimization in conventional hybrid automatic retransmission request (HARQ) systems is that high throughput is achieved at the expense ofhigh latency. The paper [21] studies a novel broadcasting HARQ strategy. The multi-layer broadcast approach is suitable for the case where transmitter has no channel state information (CSI), which is the case with HARQ schemes as well.…”

Section: +81(s)mentioning

confidence: 99%

The broadcast approach in communications systems

Steiner

Shamai

2008

2008 IEEE 25th Convention of Electrical and Electronics Engineers in Israel

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Traditional coded communication schemes for block fading channels, with channel state information (CSI) available at the receiving end only are based on fixed rate single level coding. The maximal average achievable throughput is known as the outage capacity. However, a more general approach is known as the multi-layered coded communications, termed the broadcast approach. This strategy facilitates to adapt the reliably decoded rate to the actual channel state without having any feedback link to the transmitter. Several communication settings incorporating the broadcast strategy are discussed. Among these are broadcasting over multiple-input multiple-output (MIMO) fading channels, broadcasting for minimization of expected delay, and broadcasting for minimization of expected distortion for transmission of a Gaussian source over a block fading channel. An outlook ofrelated open problems, where an analytic formulation of a broadcast approach is yet elusive or incomplete are shortly described, followed by a general perspective of layered communications in multi-terminal communication systems.Index Terms-Broadcast approach, multi-layer coding.general a non-degraded broadcast channel, for which the capacity region is not fully known [5, 6, 7, 8, 9] and cannot be reduced to an equivalent set of parallel degraded broadcast channels, as studied in [10, 3, 4]. We focus in this paper on several broadcast settings, among which are broadcasting over MIMO channels, where only sub-optimal solutions are available, broadcasting for minimization of expected delay, and broadcasting for minimization of expected distortion for transmission of a Gaussian source over a block fading channel. Some related open problems are also outlined. The reference list, which is by no means comprehensive, provides further examples of the usefulness of the broadcast approach.The rest of the paper is organized as follows. Section 2 describes the principles of the broadcast approach. Section 3 discusses a MIMO broadcast approach. Section 4 demonstrates gains ofusing an optimized broadcast approach for expected delay minimization. Section 5 considers the expected distortion as a figure of merit. Finally, Section 6 discusses other results and states several open problems. OVERVIEW OF THE BROADCAST APPROACHConsider a single-input single-output (SISO) channel,

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Multi-layer broadcasting hybrid-ARQ strategies for block fading channels

Cited by 33 publications

References 17 publications

MIMO ARQ With Multibit Feedback: Outage Analysis

MIMO ARQ With Multibit Feedback: Outage Analysis

MIMO ARQ Systems with multi-Level feedback

The broadcast approach in communications systems

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