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To improve detection performance of quadrature amplitude modulation (QAM), signal space diversity (SSD) has been exploited and adopted for the second generation of digital video broadcasting (DVB-T2) system. Maximum-likelihood detection (MLD) to get full SSD is avoided because of enormous computational complexity. Its max-log approximated detection (full(More)
A poorly water-soluble ibuprofen and ethanol can be encapsulated in gelatin microcapsule by spray-drying technique. To develop a novel ibuprofen-loaded gelatin microcapsule with bioavailability enhancement, the effect of spray-drying conditions, gelatin, ibuprofen and sodium lauryl sulfate on the ibuprofen solubility and the amount of ethanol encapsulated(More)
We consider the problem of subcarrier allocation to multiple users in a downlink OFDM access system. We study allocation schemes that provide varying degrees of tradeoff between (i) achieving throughput fairness among users, (ii) meeting tolerable latency requirements specified by the user applications, and (iii) achieving higher system capacity. The(More)
The objective of partially-adaptive array design is to reduce the number of adaptive weights without significantly degrading the performance of the adaptive array. Previous work includes numerical techniques for approximately minimizing the average generalized sidelobe canceller (GSC) output power for a desired number of adaptive weights, where the average(More)
Signal space diversity (SSD) has been exploited to improve detection performance of quadrature amplitude modulation (QAM) over fading channels and recently adopted for the second generation of digital video broadcasting system (i.e., DVB-T2). To fully exploit SSD, maximum likelihood (ML) detection has been used for soft-demapping. Because of exponential(More)
Multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) technology has become a promising solution in current wireless communication systems. However, the implementation of MIMO-OFDM systems imposes a heavy complexity burden of equalizer matrix calculation on the training symbols due to the strict processing delay(More)
Date approved by Chairman To my parents iv Acknowledgments I am grateful to all professors who taught me for the last years in Georgia Tech. I a m especially indebted to Professor Mary Ann Ingram for direction, idea, and support. Without her advise and direction I could not have written this wonderful dissertation. I am also indebted to Professors Steven(More)