A Combined Coding and Modulation Approach for Communication over Dispersive Channels

Chase, D.

doi:10.1109/tcom.1973.1091636

Cited by 76 publications

(30 citation statements)

References 8 publications

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“…• Chase Combining (CC) Schemes: These are type-II HARQ schemes in which all the retransmissions carry the same coded bits [4]. The receiver uses maximum-ratiocombining (MRC) to decode the data packet.…”

Section: Introductionmentioning

confidence: 99%

Optimal Power Allocation for Hybrid ARQ with Chase Combining in i.i.d. Rayleigh Fading Channels

Chaitanya

Larsson

2013

IEEE Trans. Commun.

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Abstract-We consider the optimization of Chase combining (CC)-based hybrid-automatic repeat request (HARQ) schemes with a limit on the maximum number of retransmissions. We formulate two optimization problems: (i) minimizing the packet drop probability (PDP) under a total average transmit power constraint, and (ii) minimizing the average transmit power under a fixed PDP constraint. Towards solving these equivalent optimization problems, we provide a closed-form expression for the outage probability of a CC-HARQ scheme. We then show that solving the optimization problems using an exact expression of the outage probability becomes complex with an increase in the maximum number of retransmissions. We propose an alternative approach in which we approximate the optimization problems by using an approximate outage probability expression and formulate the two optimization problems as two equivalent geometric programming problems (GPPs), which can be solved efficiently even for a large limit on the maximum number of retransmissions.The results show that the optimal power allocation solution provides significant gains over the equal power allocation solution. For PDP values below 10 −3 , the optimal solution provided by the GPP approach has a performance close to that of the solution provided by solving the optimization problem exactly using nonlinear optimization techniques.

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Section: Introductionmentioning

confidence: 99%

Optimal Power Allocation for Hybrid ARQ with Chase Combining in i.i.d. Rayleigh Fading Channels

Chaitanya

Larsson

2013

IEEE Trans. Commun.

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“…We denote the two successive transmissions as [S (1) S (2) ] where S (1) = S (2) After reception of the retransmission the receiver has two copies of the signals R (1) , R (2) . These can be expressed as…”

Section: B Chase Combining In Mimo-ofdm Systemsmentioning

confidence: 99%

“…The receiver now has two copies of the data which can be combined so as to improve the decoding probability. One common way to combine R (1) and R (2) is to simply average the two vectors to obtain…”

Section: B Chase Combining In Mimo-ofdm Systemsmentioning

confidence: 99%

“…As in traditional Automatic Repeat request (ARQ), a receiver requests a retransmission of a message that failed to be decoded correctly, but with HARQ rather than discarding the original (corrupted) message, the receive retains a copy and combines the original message [2], [3]. Currently, two types of HARQ are widely used: (i) repetition coding, i.e., the transmitter repeats exactly the same signals that were previously transmitted; the receiver adds up the received signals and achieves an improvement in the signal-to-noise ratio through noise averaging; (ii) incremental redundancy encoding, where the transmitter sends different parity-check bits during each retransmission.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced HARQ Technique Using Self-Interference Cancellation Coding(SICC)

Matsumoto

Kuze

Uchida

et al. 2008

2008 International Wireless Communications and Mobile Computing Conference

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The paper provides a method for combining HARQ along with Self-Interference Cancellation Coding (SICC), so that the reliability of spatial multiplexing MIMO transmissions can be improved. The simulation results show that significant gain is achieved over the traditional Chase Combining.This work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved.

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“…The two basic HARQ variants of each HARQ process are chase combining (CC) [2] and incremental redundancy (IR) [3] where the sub-channels either repeat the erroneous codewords or send new parity bits. In the existing systems, the retransmission and decoding of each sub-channel work independently.…”

Section: Introductionmentioning

confidence: 99%

A joint coding HARQ scheme for N-channel stop-and-wait protocol

Olawoyin

Yang

2014

IEICE ComEX

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N-channel stop-and-wait (SW) hybrid automatic repeat request (HARQ) protocol is widely used in wireless communication systems due to its simplicity and high efficiency. However, different HARQ processes are transmitted over sub-channels with individual encoding. We present a joint coding HARQ scheme in which erroneous codewords of N parallel channels are jointly encoded for retransmissions. Erroneous and retransmitted codewords form a linear concatenated block code which is jointly decoded with a low complexity iterative decoding algorithm. Simulation results show that the normalized throughput performance obtains a significant gain while complexity increasing is limited.

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A Combined Coding and Modulation Approach for Communication over Dispersive Channels

Cited by 76 publications

References 8 publications

Optimal Power Allocation for Hybrid ARQ with Chase Combining in i.i.d. Rayleigh Fading Channels

Optimal Power Allocation for Hybrid ARQ with Chase Combining in i.i.d. Rayleigh Fading Channels

Enhanced HARQ Technique Using Self-Interference Cancellation Coding(SICC)

A joint coding HARQ scheme for N-channel stop-and-wait protocol

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