Abstract
The paper investigates effective protocols and the corresponding performance for cooperative automatic retransmission request (ARQ) that uses the decode-andforward (DF) opportunistic distributed space-time coding (ODSTC). According to the analysis, the delay-limited throughput enjoys significant enhancement even using one or two active relays only for ARQs than using direct retransmissions. Besides, allowing the non-active relays to overhear the DSTC signal sent by active relays during ARQs also leads to a better throughput via ODSTC. Nevertheless, in the high or the low SNR regimes, simple schemes without overhearing may provide almost the same performance offered by a scheme with overhearing despite the much inferior diversities. These features may be further explored to enhance the overall system throughput for multiple access systems using only limited system resources.
Original language | English |
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Journal | IEEE Vehicular Technology Conference |
DOIs | |
State | Published - 2010 |
Event | 2010 IEEE 71st Vehicular Technology Conference, VTC 2010-Spring - Taipei, Taiwan Duration: 16 May 2010 → 19 May 2010 |
Keywords
- Cooperative ARQ
- Cooperative relaying
- Opportunistic DSTC