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We present a network-assisted scheme for media-aware bandwidth sharing among multiple video streaming sessions. Departing from the conventional paradigm of fair-rate allocation among data traffic flows, our scheme allocates the bottleneck bandwidth among the video streams according to their rate-distortion (R-D) characteristics, with the objective of minimizing the total video distortion of all streams...
A fully integrated CMOS receiver consisting of an LNA and a mixer has been designed and fabricated in IBM BiCMOS 7WL 180 nm technology. An on-chip balun loading the second stage of the LNA was implemented as well for single-to-differential conversion. The receiver was developed for high performance wireless local positioning systems and excellent experimental results were demonstrated: a conversion...
A digitally controlled variable gain amplifier (VGA) for low power, low-IF receivers is presented. The amplifier was designed and fabricated in IBM 7WL BiCMOS 180 nm technology. It shows a dynamic range of 45 dB with a maximum gain of 52 dB and a minimum gain of 7 dB. The gain variation is achieved by means of switched feedback resistors. These are controlled by a demultiplexer and 4 control bits...
In this work we present a fully integrated BiCMOS RF-receiver. The receiver comprises an LNA and a mixer. The most challenging aspects of the design were the high gain and an extremely low noise figure specified by RESOLUTION. The target was to achieve an integrated LNA and mixer showing at least 25 dB voltage conversion gain and overall noise figure less than 4 dB under minimum power consumption...
This work demonstrates an integrated low noise, high gain receiver targeted for wireless local positioning applications. The receiver is implemented in a 0.18 mum SiGe BiCMOS technology. With a single ended input and differential output the receiver comprises a two stage bipolar low noise amplifier with integrated on-chip transformer for single to differential conversion and a double balanced mixer...
This paper investigates a slotted random access system where packet capture is modeled using communication theoretic techniques. It is shown that the optimum rates and attempt probabilities depend on the receiver architecture, operating signal-to-noise ratio (SNR) and block length. High SNR analysis reveals that joint decoder asymptotically yields either a collision channel or a non-interacting channel,...
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