Code Combining--A Maximum-Likelihood Decoding Approach for Combining an Arbitrary Number of Noisy Packets

Chase, D.

doi:10.1109/tcom.1985.1096314

Cited by 819 publications

(373 citation statements)

References 7 publications

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“…Ideal channel estimation is assumed, and required CSI is assumed to be available at each node to calculate FDE weights. Chase combining [12] and incremental redundancy [20] are used for the HARQ strategy. Except in Fig.…”

Section: A Simulation Parametersmentioning

confidence: 99%

“…The Tx/Rx FDE weights are jointly designed based on the minimum mean-square-error (MMSE) criterion under the transmit power constraint. In [10] and [11], an extension of joint Tx/Rx FDE to hybrid automatic repeat request (HARQ) with chase combining [12] was presented; the Tx/Rx FDE weights, which jointly minimize the mean square error (MSE) after packet combining at the receiver side, are applied to the packet upon each request of packet retransmission. It was shown that the joint Tx/Rx FDE is effective in obtaining a higher packet combining gain and improves the throughput performance.…”

mentioning

confidence: 99%

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Joint Cooperative-Transmit and Receive FDE for Single-Carrier Incremental Relaying

Adachi

Takeda

Sun

et al. 2013

IEEE Trans. Veh. Technol.

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Abstract-In this paper, we propose joint cooperativetransmit/receive frequency-domain equalization (cooperative-Tx/Rx FDE) with incremental relaying (IR) for broadband single-carrier (SC) transmission under the total and individual transmit power constraint at a source node (S) and a relay node (R). We derive the optimum cooperative-Tx/Rx FDE weights to minimize the mean square error (MSE) after packet combining at a destination node (D). We show that the optimum cooperative-Tx FDE weights allocate the transmit power in the minimum MSE (MMSE) sense in the frequency domain and in the maximal ratio transmission (MRT) sense in the spatial domain. To relax the condition that the complete channel state information (CSI) needs to be shared among all nodes, selection-based suboptimum cooperative-Tx FDE weights are derived. Computer simulation verifies the effectiveness of the proposed schemes and shows that the 5%-outage throughput of the system can be increased by around 30% over the conventional IR with only Rx FDE.Index Terms-Cooperative relay transmission, frequencydomain equalization (FDE), single-carrier (SC) transmission.

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Section: A Simulation Parametersmentioning

confidence: 99%

mentioning

confidence: 99%

Joint Cooperative-Transmit and Receive FDE for Single-Carrier Incremental Relaying

Adachi

Takeda

Sun

et al. 2013

IEEE Trans. Veh. Technol.

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“…The quality of r ′ 1 is not only dependent on the channel quality during the retransmission phase, but also on the residual errors e 2 resulting from the difference betweenĉ 2 and c 2 . r ′ 1 is then combined using MRC with r 1 and the resultant information is hard demodulated then decoded to obtainb 1 .…”

Section: B Receiver Structurementioning

confidence: 99%

“…The receiver then combines the packet that was not correctly decoded with subsequent retransmission(s) of that same packet, resulting in a combined packet that is more reliable to decode than any of its constituents. Two variants of HARQ with soft combining exist: Chase combining (CC) [1] and incremental redundancy (IR) [2]. In the case of CC, the retransmitted packet is identical to the original transmission.…”

Section: Introductionmentioning

confidence: 99%

A Unicast Retransmission Scheme Based on Network Coding

Manssour

Osseiran

Slimane

2012

IEEE Trans. Veh. Technol.

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Abstract-A novel scheme for data retransmission for wireless unicast communication is presented. The scheme is based on a transmitter and receiver structure and bit-level data processing using a combination of channel coding and network coding that allows retransmissions to contain the previously incorrectly received information and new information, both destined to the same receiver. Results show that, for the chosen forward error codes, up to 68.75% retransmission throughput gains are achieved compared to HARQ with Chase combining.

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“…Then, we propose a novel Hybrid ARQ cooperative scheme, referred to as cooperative partial retransmission (CPR), in which the relay retransmits only a fraction of the original message when the destination requests a retransmission. The system operates under the incremental DF (IDF) cooperative protocol using Type-I HARQ with chase combining (CC) [19]. The option for Type-I HARQ with chase combining is supported by some recent results [20][21][22], which demonstrate that Type-I HARQ may perform very close to Type-II HARQ (incremental redundancy-IR) with a considerably smaller computational complexity.…”

Section: Introductionmentioning

confidence: 99%

Cooperative partial retransmission scheme in incremental decode-and-forward relaying

Brante

Souza

Pellenz

2011

J Wireless Com Network

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In this paper, we present a novel hybrid automatic repeat request (HARQ) scheme for cooperative communication systems, called cooperative partial retransmission (CPR). The method is based on the retransmission of only a fraction of the original code word by the cooperating nodes. Based on the outage analysis, we derive the theoretical throughput expressions that are compared to numerical simulations using LDPC codes, showing that CPR outperforms regular cooperative HARQ techniques. Additionally, we show that the CPR throughput, even using a single relay, may be considerably larger than the throughput of a regular cooperative HARQ scheme using multiple relays. Finally, the energy consumption analysis of the schemes shows that CPR consumes less energy than regular cooperative HARQ, mainly due to the shorter retransmissions.

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Code Combining--A Maximum-Likelihood Decoding Approach for Combining an Arbitrary Number of Noisy Packets

Cited by 819 publications

References 7 publications

Joint Cooperative-Transmit and Receive FDE for Single-Carrier Incremental Relaying

Joint Cooperative-Transmit and Receive FDE for Single-Carrier Incremental Relaying

A Unicast Retransmission Scheme Based on Network Coding

Cooperative partial retransmission scheme in incremental decode-and-forward relaying

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