Abstract
This paper investigates the performance of two low-complexity combining schemes, which are based on one- or two-phase observation, to mitigate multipath fading in dual-hop amplify-and-forward relaying systems. For the one-phase-based combining, a single-antenna station is assumed to relay information from a multiple-antenna transmitter to a multiple-antenna receiver, and the activation of the receive antennas is adaptively performed based on the second-hop statistics, regardless of the first-hop conditions. On the other hand, the two-phase-based combining suggests using multiple single-antenna stations between the multipleantenna transmitter and the single-antenna receiver, where the suitable set of active relays is identified according to the precombining end-to-end fading conditions. To facilitate comparisons between the two schemes, formulations for the statistics of the combined signal-to-noise ratio and some performance measures are presented. Numerical and simulation results are shown to clarify the tradeoff between the achieved diversity-array gain, the processing complexity, and the power consumption.
Original language | English (US) |
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Article number | 6054066 |
Pages (from-to) | 826-833 |
Number of pages | 8 |
Journal | IEEE Transactions on Vehicular Technology |
Volume | 61 |
Issue number | 2 |
DOIs | |
State | Published - Feb 2012 |
Keywords
- Amplify-and-forward (AF) protocol
- Dual-hop relaying
- Low-complexity diversity combining
- Multiple-antenna systems
- Performance measures
- Receive diversity
- Transmit diversity
ASJC Scopus subject areas
- Aerospace Engineering
- Applied Mathematics
- Electrical and Electronic Engineering
- Automotive Engineering