Orthogonal Frequency Division Multiplexing with Diversity for Future Wireless Systems

Orthogonal Frequency Division Multiplexing with Diversity for Future Wireless Systems

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The book examines several aspects of Orthogonal Frequency Division Multiplexing (OFDM) employing linear diversity techniques such as inter-carrier interference, bit error rate, peak to average power ...
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Multi-channel Communications with Adaptive Modulation, Power Loading, and Diversity Combining

Pp. 344-394 (51)

Sang-Do Lee and Young-Chai Ko

Abstract

To achieve higher spectral efficiency and more efficient usage of channel resources, adaptive modulation can be used jointly with diversity combining, or with power-loading, or with both selection diversity and power loading. We derive closed-form expressions of the performance of multi-channel systems with the conventional adaptive modulation and hybrid schemes, in terms of the spectral efficiency, the average bit error rate and the outage probability. Numerical results show that average modulation with selection-combining and power-loading (AMSP) offers higher spectral efficiency and lower outage probability than other schemes, and is more reliable in low signal to noise ratio (SNR) regions.

Keywords:

Multi-channel communications, adaptive modulation, power loading, selection combining, AMDC

Affiliation:

Digital Media and Communications R Centre, Samsung Electronics, Suwon, Korea.