The throughput of hybrid-ARQ protocols for the Gaussian collision channel

Caire, Giuseppe; Tuninetti, Daniela

doi:10.1109/18.930931

Cited by 616 publications

(660 citation statements)

References 47 publications

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“…With H-ARQ, the length of each coded block is now variable. With IR (incremental redundancy) specifically, mutual information is accumulated over successive H-ARQ rounds [8]. If we let M k (SNR) denote the mutual information after k rounds, then the number of rounds needed to decode a block is the smallest integer K such that…”

Section: Case Study: a Modern Mimo-ofdm Systemmentioning

confidence: 99%

De-Hyping Transmit Diversity in Modern MIMO Cellular Systems

Jindal

Lozano

2009

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference

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Abstract-A contemporary perspective on the tradeoff between transmit antenna diversity and spatial multiplexing is provided. It is argued that, in the context of modern cellular systems and for the operating points of interest, transmission techniques that utilize all available spatial degrees of freedom for multiplexing outperform techniques that explicitly sacrifice spatial multiplexing for diversity. Reaching this conclusion, however, requires that the channel and some key system features be adequately modeled; failure to do so may bring about starkly different conclusions. As a specific example, this contrast is illustrated using the 3GPP Long-Term Evolution system design.

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Section: Case Study: a Modern Mimo-ofdm Systemmentioning

confidence: 99%

De-Hyping Transmit Diversity in Modern MIMO Cellular Systems

Jindal

Lozano

2009

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference

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“…The performance of rateless codes, such as LT and Raptor codes, were compared with punctured codes in [17] and were further investigated in a wireless relay-aided network in [18]. Another coding scheme designed for cooperative communication is constituted by the HARQ scheme of [19,20].…”

Section: Introductionmentioning

confidence: 99%

Amplify-forward and decode-forward cooperation relying on systematic Luby transform coded Hybrid Automatic-Repeat-reQuest

2011

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Systematic Luby transform (SLT) codes constitute rateless codes, which are capable of adaptively adjusting their code rate depending on the channel quality without any explicit channel state information (CSI) at the transmitters. SLTs are also suitable for space time collaboration-aided relay networks. In this study, an iterative decoding-aided SLT scheme is combined with 16 quadrature amplitude modulation (QAM) transmission in a wireless relay-aided network. The bit error ratio (BER) results and extrinsic information transfer (EXIT) charts are provided to evaluate the performance of the proposed scheme. The simulation results show that the proposed scheme using amplify-and-forward (AF) relaying achieves a 2.5 dB gain at a BER of 10 25 , while the attainable improvement is nearly 6 dB for decode-and-forward (DF) relaying, compared to the noniterative detection scheme operating without the relay's assistance. Moreover, the AF relaying-aided SLT coded 16-QAM scheme is more beneficial, when the relay station is close to the source. By contrast, the DF relaying performs best near the mid-point between the source and the destination. Additionally, a modified Hybrid Automatic-Repeat-reQuest (HARQ) protocol using incremental redundancy is applied along with the SLT-coded 16-QAM scheme in order to enhance the achievable throughput and energy efficiency of cooperative networks. This arrangement reduces the total transmit power by about 5%, compared to the classic HARQ scheme.

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“…The mother codeword is then partitioned into M data packets, where each packet is a distinct portion of the low rate mother code (achieved through rate compatible puncturing). The constant M is called the rate constraint of the hybrid-ARQ protocol [4]. Fast-HARBINGER transmits each message via a source communication session which spans at most M NCIs.…”

Section: The Harbinger Protocolmentioning

confidence: 99%

“…With diversity-combining the receiver sees a channel with a higher effective SNR, while with code-combining it receives a code with a lower effective rate. Because the capacity of code-combining is always at least as good as the capacity of diversity-combining [4], that will be the focus of the remainder of this discussion.…”

Section: Introductionmentioning

confidence: 99%

“…While these nodes are too far away to successfully decode the initial source transmission, they might be able to decode after the second (or later) transmission if they combine all the information they have received. This is the underlying concept behind (type-II) hybrid-ARQ [4]. With hybrid-ARQ, packets are combined in one of two ways: (1) The receiver diversity-combines repeated transmissions, (2) The source encodes the message with a low rate code and through rate-compatible puncturing a distinct portion of the codeword is transmitted each time (incremental-redundancy); the receiver code-combines the received code fragments.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Geographic random forwarding with hybrid-ARQ for ad hoc networks with rapid sleep cycles

Zhao¹,

Seshadri

Valenti

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04.

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Abstract-This paper proposes and analyzes a new crosslayer protocol for ad hoc and sensor networks that unifies the concepts of Geographic Random Forwarding (GeRaF) and hybrid-ARQ. The protocol is given the descriptive name Hybrid ARq-Based Intra-cluster GEographically-informed Relaying (HARBINGER). Like GeRaF, HARBINGER assumes that each node knows its own position and that messages are addressed by location. As is common for sensor networks, the nodes cycle on-and-off according to a sleep schedule. Unlike GeRaF, which returns to the initial transmission state if no active node is within range, the nodes in HARBINGER combine transmissions thereby achieving an additional timediversity benefit. With HARBINGER, a lower density of active nodes will achieve almost the same delay and energy efficiency as GeRaF, implying that a lower duty cycle sleep schedule could be used to prolong the useful lifetime of the network. The paper gives detailed analysis of a version of the protocol (Fast-HARBINGER) whereby the sleep states of the network are synchronized with the data packet transmission rate of the network.

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The throughput of hybrid-ARQ protocols for the Gaussian collision channel

Cited by 616 publications

References 47 publications

De-Hyping Transmit Diversity in Modern MIMO Cellular Systems

De-Hyping Transmit Diversity in Modern MIMO Cellular Systems

Amplify-forward and decode-forward cooperation relying on systematic Luby transform coded Hybrid Automatic-Repeat-reQuest

Geographic random forwarding with hybrid-ARQ for ad hoc networks with rapid sleep cycles

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