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 |
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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 |
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Country | United Kingdom |
City | Glasgow |
Period | 11.5.15 → 14.5.15 |
ASJC Scopus subject areas
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering