Gareth Middleton

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We study an integrated multiflow network model, in which physical-layer rate control and link-layer medium access and routing decisions are jointly optimized. In particular, we explore the challenges involved in incorporating the three-terminal cooperative paradigm into such a broader resource allocation problem. We present several methods for defining(More)
—When designing distributed wireless networks utilizing shared bandwidth, a critical issue is allocating spatial and temporal resources to streaming information flows. We focus on large networks of half-duplex terminals sharing common bandwidth, and study methods for allocating resources on a fine-grained temporal basis, with specific emphasis on managing(More)
— In this paper, we will consider the impact of finite resolution in a receiver analog-digital converter on the performance of square, linearly modulated systems over fading channels. We show that in fading channels, the probability of error in a quantized system cannot be reduced to zero due to the introduction of quantization noise, even for arbitrarily(More)
—Resource reuse at the system level is introduced for the realistic urban cellular environment. Our proposal for reuse is presented, and we give a mathematical requirement for allowing resources to be shared: specifically, we find the minimum distance which must separate all active links in order for a minimum SINR to be guaranteed. This sharing proposal(More)
—We present a wide-area, multiflow ad-hoc network model leveraging information-theoretic rate control, emphasizing interfering rather than colliding transmissions. We seek to allocate resources in this network by optimizing scheduling, routing and power control to solve the max-min throughput problem for all flows involved. In general, our time-slotted,(More)
We introduce the problem of joint routing, scheduling and power control for multiple information flows in half-duplex, interference limited ad-hoc networks. The joint problem of optimizing for throughput is NP-Hard, and so we present an approximation of the problem and a general framework for solving it in O(N<sup>3</sup>) time. We attack the problem in two(More)
— Recently, new network topologies including relays and meshed networks have emerged as a key technology receiving a lot of attention due the increasing need for additional resources such as spectrum and required high data-rates. In this paper, we identify and describe the novel network topologies that will be able to accommodate the foreseen high data(More)
Today's wireless communications systems rely on digital signal processing , requiring analog-digital conversion (quantization) at the front end of the receiver. We analyze the effects of quantization-induced error on the performance of a general class of single-carrier systems, showing that the combined action of channel fading and quantization leads to(More)