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Performance Analysis of Fully Joint Diversity Combining, Adaptive Modulation, and Power Control SchemesBouida, Zied 14 January 2010 (has links)
Adaptive modulation and diversity combining represent very important adaptive
solutions for future generations of wireless communication systems. Indeed, to
improve the performance and the efficiency of these systems, these two techniques
recently have been used jointly in new schemes named joint adaptive modulation
and diversity combining (JAMDC) schemes. Considering the problem of finding lowcomplexity,
bandwidth-efficient, and processing-power efficient transmission schemes
for a downlink scenario and capitalizing on some of these recently proposed JAMDC
schemes, we propose and analyze three fully joint adaptive modulation, diversity
combining, and power control (FJAMDC) schemes. More specifically, the modulation
constellation size, the number of combined diversity paths, and the needed power
level are determined jointly to achieve the highest spectral efficiency with the lowest
possible combining complexity, given the fading channel conditions and the required
bit error rate (BER) performance. The performance of these three FJAMDC schemes
is analyzed in terms of their spectral efficiency, processing power consumption, and
error-rate performance. Selected numerical examples show that these schemes considerably
increase the spectral efficiency of the existing JAMDC schemes with a slight increase in the average number of combined paths for the low signal to noise ratio
range while maintaining compliance with the BER performance and a low radiated
power resulting in a substantial decrease in interference to co-existing systems/users.
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PERFORMANCE ANALYSIS OF GENERALIZED SELECTION COMBINING IN ARBITRARILY CORRELATED NAKAGAMI FADING CHANNELSJAIN, VISHESH January 2005 (has links)
No description available.
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Simulation and Mathematical Tools for Performance Analysis of Low-Complexity ReceiversDeora, Gautam Krishnakumar 19 February 2003 (has links)
In recent years, research on the design and performance evaluation of suboptimal receiver implementations has received considerable attention owing to complexity in the realization of the optimal receiver algorithms over wireless channels. This thesis addresses the effects of using reduced complexity receivers for the Satellite Digital Audio Radio (SDAR), Code Division Multiple Access (CDMA) and UltraWideband (UWB) communications technologies.
A graphical-user-interface simulation tool has been developed to predict the link reliability performance of the SDAR services in the continental United States. Feasibility study of receiving both satellite and terrestrial repeater signals using a selection diversity (single antenna) receiver has also been performed.
The thesis also develops a general mathematical framework for studying the efficacy of a sub-optimal generalized selection combining (GSC) diversity receiver over generalized fading channel models. The GSC receiver adaptively combines a subset of M diversity paths with the highest instantaneous signal-to-noise ratios (SNR) out of the total L available diversity paths. The analytical framework is applicable for rake receiver designs in CDMA and UWB communications. / Master of Science
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