An Adaptive MIMO System Using Incremental Diversity

Elshabrawy, Tallal; Nafie, Sally

doi:10.1109/vtcfall.2013.6692089

Cited by 2 publications

(2 citation statements)

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“…The above concept of incremental diversity has been introduced in our work in [12]. In this paper, the proposed incremental diversity scheme can be set to operate in two different modes; Rate-Adaptive, and Energy-Conservative.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, the proposed incremental diversity scheme can be set to operate in two different modes; Rate-Adaptive, and Energy-Conservative. In the rate-adaptive mode, the results of [12] are extended to show that the proposed scheme enhances spectral efficiency while maintaining BER reliability under various MIMO configurations. In particular, it is shown that at certain SNR operation ranges, the spectral efficiency of lower order constellation sizes approaches or even surpasses those of higher order constellations.…”

Section: Introductionmentioning

confidence: 99%

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Incremental Diversity: A Framework for Rate-Adaptation/Energy-Conservation Enhancement in MIMO Systems

Elshabrawy

Nafie

2014

IJCNS

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In recent years, MIMO technology has emerged as one of the technical breakthroughs in the field of wireless communications. Two famous MIMO techniques have been investigated thoroughly throughout the literature; Spatial Multiplexing, and Space Time Block Coding. On one hand, Spatial Multiplexing offers high data rates. On the other hand, Space Time Block Coding presents transmission fidelity. This imposes a fundamental tradeoff between capacity and reliability. Adaptive MIMO Switching schemes have been proposed to select the MIMO scheme that best fits the channel conditions. However, the switching schemes presented in the literature directly switch between the MIMO endpoints. In this paper, an adaptive MIMO system that incrementally switches from multiplexing towards diversity is proposed. The proposed scheme is referred to as incremental diversity and can be set to operate in two different modes; Rate-Adaptive, and Energy-Conservative Incremental Diversity. Results indicate that the proposed incremental diversity framework achieves transmission reliability offered by MIMO diversity, while maintaining a gradual increase in spectral efficiency (in the Rate-Adaptive mode) or a reduction in required number of received symbols (in the Energy-Conservative mode) with increase in the SNR.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%