Abstract
This letter presents a novel distributed LDLC (D-LDLC) relaying scheme for the classical relay channel. The relay node decodes LDLC packets from the source and forwards an additional parity message to the destination. The destination then performs joint decoding in order to exploit the available coding gain as well as diversity gain. First, assuming AWGN links, density evolution is used to optimize the noise threshold of the overall parity-check matrix, and this method is shown to produce good finite-length D-LDLC designs. Then, we provide results for the optimized D-LDLCs under Rayleigh fading channel conditions. Joint decoding based on D-LDLC is shown to provide approximately 3 dB gain over distributed 4-PAM turbo codes under the same conditions (data rate and overall transmission power).
| Original language | English |
|---|---|
| Article number | 7317728 |
| Pages (from-to) | 77-80 |
| Number of pages | 4 |
| Journal | IEEE Communications Letters |
| Volume | 20 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Jan 2016 |
| Externally published | Yes |
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Keywords
- Coded cooperation
- Distributed channel coding
- Low-density lattice codes (LDLCs)
- Relay channel
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Science Applications
- Modelling and Simulation
Cite this
Distributed low-density lattice codes. / Chen, Bin; Jayakody, Dushantha N K; Flanagan, Mark F.
In: IEEE Communications Letters, Vol. 20, No. 1, 7317728, 01.01.2016, p. 77-80.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Distributed low-density lattice codes
AU - Chen, Bin
AU - Jayakody, Dushantha N K
AU - Flanagan, Mark F.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - This letter presents a novel distributed LDLC (D-LDLC) relaying scheme for the classical relay channel. The relay node decodes LDLC packets from the source and forwards an additional parity message to the destination. The destination then performs joint decoding in order to exploit the available coding gain as well as diversity gain. First, assuming AWGN links, density evolution is used to optimize the noise threshold of the overall parity-check matrix, and this method is shown to produce good finite-length D-LDLC designs. Then, we provide results for the optimized D-LDLCs under Rayleigh fading channel conditions. Joint decoding based on D-LDLC is shown to provide approximately 3 dB gain over distributed 4-PAM turbo codes under the same conditions (data rate and overall transmission power).
AB - This letter presents a novel distributed LDLC (D-LDLC) relaying scheme for the classical relay channel. The relay node decodes LDLC packets from the source and forwards an additional parity message to the destination. The destination then performs joint decoding in order to exploit the available coding gain as well as diversity gain. First, assuming AWGN links, density evolution is used to optimize the noise threshold of the overall parity-check matrix, and this method is shown to produce good finite-length D-LDLC designs. Then, we provide results for the optimized D-LDLCs under Rayleigh fading channel conditions. Joint decoding based on D-LDLC is shown to provide approximately 3 dB gain over distributed 4-PAM turbo codes under the same conditions (data rate and overall transmission power).
KW - Coded cooperation
KW - Distributed channel coding
KW - Low-density lattice codes (LDLCs)
KW - Relay channel
UR - http://www.scopus.com/inward/record.url?scp=84959318458&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84959318458&partnerID=8YFLogxK
U2 - 10.1109/LCOMM.2015.2497679
DO - 10.1109/LCOMM.2015.2497679
M3 - Article
AN - SCOPUS:84959318458
VL - 20
SP - 77
EP - 80
JO - IEEE Communications Letters
JF - IEEE Communications Letters
SN - 1089-7798
IS - 1
M1 - 7317728
ER -