Abstract
This paper proposes a new power efficient multilevel threshold based soft quantization (MLT- SQ+PA) scheme for a multiple access relay system (MARS). In the proposed MLTSQ+ PA protocol, the relay computes the reliabilities, expressed as log-likelihood ratios (LLRs), of the received signals from the two sources. We provide an analytical closed form expression for the optimized power allocation factor at the relay. The relay evaluates the LLRs of the network-coded packet, quantizes and scales these using the optimum power allocation factor, forwarding the resulting »quantized soft symbols» to the destination. Compared to competing schemes, the performance of our system is superior in terms of BER when the same amount of channel state information (CSI) is exploited.
| Original language | English |
|---|---|
| Title of host publication | 2015 IEEE 81st Vehicular Technology Conference, VTC Spring 2015 - Proceedings |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Volume | 2015 |
| ISBN (Electronic) | 9781479980888 |
| DOIs | |
| Publication status | Published - 1 Jul 2015 |
| Externally published | Yes |
| Event | 81st IEEE Vehicular Technology Conference, VTC Spring 2015 - Glasgow, United Kingdom Duration: 11 May 2015 → 14 May 2015 |
Conference
| Conference | 81st IEEE Vehicular Technology Conference, VTC Spring 2015 |
|---|---|
| Country | United Kingdom |
| City | Glasgow |
| Period | 11.5.15 → 14.5.15 |
Fingerprint
ASJC Scopus subject areas
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering
Cite this
Optimum power allocation for LDPC coded soft forwarding scheme in wireless networks. / Jayakody, Dushantha N.K.; Li, Jun.
2015 IEEE 81st Vehicular Technology Conference, VTC Spring 2015 - Proceedings. Vol. 2015 Institute of Electrical and Electronics Engineers Inc., 2015. 7145988.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Optimum power allocation for LDPC coded soft forwarding scheme in wireless networks
AU - Jayakody, Dushantha N.K.
AU - Li, Jun
PY - 2015/7/1
Y1 - 2015/7/1
N2 - This paper proposes a new power efficient multilevel threshold based soft quantization (MLT- SQ+PA) scheme for a multiple access relay system (MARS). In the proposed MLTSQ+ PA protocol, the relay computes the reliabilities, expressed as log-likelihood ratios (LLRs), of the received signals from the two sources. We provide an analytical closed form expression for the optimized power allocation factor at the relay. The relay evaluates the LLRs of the network-coded packet, quantizes and scales these using the optimum power allocation factor, forwarding the resulting »quantized soft symbols» to the destination. Compared to competing schemes, the performance of our system is superior in terms of BER when the same amount of channel state information (CSI) is exploited.
AB - This paper proposes a new power efficient multilevel threshold based soft quantization (MLT- SQ+PA) scheme for a multiple access relay system (MARS). In the proposed MLTSQ+ PA protocol, the relay computes the reliabilities, expressed as log-likelihood ratios (LLRs), of the received signals from the two sources. We provide an analytical closed form expression for the optimized power allocation factor at the relay. The relay evaluates the LLRs of the network-coded packet, quantizes and scales these using the optimum power allocation factor, forwarding the resulting »quantized soft symbols» to the destination. Compared to competing schemes, the performance of our system is superior in terms of BER when the same amount of channel state information (CSI) is exploited.
UR - http://www.scopus.com/inward/record.url?scp=84940398808&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84940398808&partnerID=8YFLogxK
U2 - 10.1109/VTCSpring.2015.7145988
DO - 10.1109/VTCSpring.2015.7145988
M3 - Conference contribution
VL - 2015
BT - 2015 IEEE 81st Vehicular Technology Conference, VTC Spring 2015 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
ER -