Matthew Pugh

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—A random beamforming scheme for the Gaussian MIMO broadcast channel with channel quality feedback is investigated and extended. Considering the case where the receivers each have receive antennas, the effects of feeding back various amounts of signal-to-interference-plus-noise ratio (SINR) information are analyzed. Using the results from order statistics(More)
Feedback of channel state information (CSI) in wireless systems is essential in order to exploit multiuser diversity and achieve the highest possible performace. When each spatially distributed user in the wireless system is assumed to have i.i.d. scalar CSI values, the optimal fixed-rate and entropy-constrained point density functions are established in(More)
In this paper we analyze the performance of random beamforming schemes in a multiuser Gaussian broadcast channel utilizing SINR feedback. For generality, the receivers are allowed to have multiple receive antennas. The first scheme analyzed allows each receiver to feed back the largest SINR it observes for each transmit beam. The distribution function of(More)
Whilst cognitive-behavioural therapy has demonstrated efficacy in the treatment of eating disorders, therapy outcomes and current conceptualizations still remain inadequate. In light of these shortcomings there has been growing interest in the utility of schema therapy applied to eating pathology. The present article first provides a narrative review of(More)
In this paper we analyze the performance of random beam-forming schemes in a multiuser Gaussian broadcast channel. Each user will have N > 1 receive antennas allowing optimal combining to be performed. To notify the transmitter of its current channel state, each user feeds back their SINR after LMMSE combining. Two feedback schemes are analyzed. The first(More)
In a Gaussian multiple-input multiple-output (MIMO) broadcast channel with random transmit beamforming and a greedy scheduling algorithm, the question of which receivers should feed back their channel state information (CSI) is investigated. A thresholding mechanism is applied to the CSI such that receivers observing CSI lower than the threshold do not feed(More)
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