Abstract
In this paper, we propose a new methodology for soft forwarding which is based on a novel technique known as soft angular modulation (SAM). This is effective even under poor source-relay link conditions. The new treatment presented here allows a more flexible system design. This makes soft forwarding, which is not practical with current infrastructure, a feasible approach. In this work, we convert soft information from the soft domain into the angular domain. We then forward unity amplitude symbols using wireless fading channels. Due to the analogue nature of the probabilistic content (or soft information), the soft information relaying (SIR) scheme is not treated as a practically feasible relay protocol. We offer a remedy to this by forwarding unity amplitude symbols from the relay. Using the expression of soft noise variance, we deduct an approximate log likelihood ratio (LLR) expression for a parallel relay network employing SAM scheme. It is shown that the derived BER of SAM and numerical BER are closely aligned. The proposed scheme yields improved BER performance as compared to other conventional schemes.
| Original language | English |
|---|---|
| Title of host publication | 2018 IEEE 87th Vehicular Technology Conference, VTC Spring 2018 - Proceedings |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 1-6 |
| Number of pages | 6 |
| Volume | 2018-June |
| ISBN (Electronic) | 9781538663554 |
| DOIs | |
| Publication status | Published - 20 Jul 2018 |
| Event | 87th IEEE Vehicular Technology Conference, VTC Spring 2018 - Porto, Portugal Duration: 3 Jun 2018 → 6 Jun 2018 |
Conference
| Conference | 87th IEEE Vehicular Technology Conference, VTC Spring 2018 |
|---|---|
| Country | Portugal |
| City | Porto |
| Period | 3.6.18 → 6.6.18 |
Fingerprint
Keywords
- and soft symbols
- relay channel
- soft angular modulation
ASJC Scopus subject areas
- Computer Science Applications
- Electrical and Electronic Engineering
- Applied Mathematics
Cite this
An Angular Soft Forwarding Scheme for Wireless Cooperative Relay Networks. / Jayakody, Dushantha Nalin K.; Qaraqe, Marwa; Dinis, Rui.
2018 IEEE 87th Vehicular Technology Conference, VTC Spring 2018 - Proceedings. Vol. 2018-June Institute of Electrical and Electronics Engineers Inc., 2018. p. 1-6.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - An Angular Soft Forwarding Scheme for Wireless Cooperative Relay Networks
AU - Jayakody, Dushantha Nalin K.
AU - Qaraqe, Marwa
AU - Dinis, Rui
PY - 2018/7/20
Y1 - 2018/7/20
N2 - In this paper, we propose a new methodology for soft forwarding which is based on a novel technique known as soft angular modulation (SAM). This is effective even under poor source-relay link conditions. The new treatment presented here allows a more flexible system design. This makes soft forwarding, which is not practical with current infrastructure, a feasible approach. In this work, we convert soft information from the soft domain into the angular domain. We then forward unity amplitude symbols using wireless fading channels. Due to the analogue nature of the probabilistic content (or soft information), the soft information relaying (SIR) scheme is not treated as a practically feasible relay protocol. We offer a remedy to this by forwarding unity amplitude symbols from the relay. Using the expression of soft noise variance, we deduct an approximate log likelihood ratio (LLR) expression for a parallel relay network employing SAM scheme. It is shown that the derived BER of SAM and numerical BER are closely aligned. The proposed scheme yields improved BER performance as compared to other conventional schemes.
AB - In this paper, we propose a new methodology for soft forwarding which is based on a novel technique known as soft angular modulation (SAM). This is effective even under poor source-relay link conditions. The new treatment presented here allows a more flexible system design. This makes soft forwarding, which is not practical with current infrastructure, a feasible approach. In this work, we convert soft information from the soft domain into the angular domain. We then forward unity amplitude symbols using wireless fading channels. Due to the analogue nature of the probabilistic content (or soft information), the soft information relaying (SIR) scheme is not treated as a practically feasible relay protocol. We offer a remedy to this by forwarding unity amplitude symbols from the relay. Using the expression of soft noise variance, we deduct an approximate log likelihood ratio (LLR) expression for a parallel relay network employing SAM scheme. It is shown that the derived BER of SAM and numerical BER are closely aligned. The proposed scheme yields improved BER performance as compared to other conventional schemes.
KW - and soft symbols
KW - relay channel
KW - soft angular modulation
UR - http://www.scopus.com/inward/record.url?scp=85050982616&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85050982616&partnerID=8YFLogxK
U2 - 10.1109/VTCSpring.2018.8417566
DO - 10.1109/VTCSpring.2018.8417566
M3 - Conference contribution
AN - SCOPUS:85050982616
VL - 2018-June
SP - 1
EP - 6
BT - 2018 IEEE 87th Vehicular Technology Conference, VTC Spring 2018 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
ER -