Given the need to provide users with reasonable feedback about the \costs" their network usage incurs, and the increasingly commercial nature of the Internet, we believe that the allocation of cost among users will play an important role in future networks. This paper discusses cost allocation in the context of multicast ows. The question we discuss is this: when a single data ow is shared amon...

In this work we propose novel decision feedback (DF) detection algorithms with error propagation mitigation capabilities for multiinput multi-output (MIMO) spatial multiplexing systems based on multiple processing branches. The novel strategies for detection exploit different patterns, orderings and constraints for the design of the feedforward and feedback filters. We present constrained minim...

This paper presents feedback design of a desktop visual communications system. The system consists of video coding using a 3-D graphics model and video transmission over the Internet. To reduce the overall video quality degradation in visual communications caused by coding and networking errors, we jointly researched the compression and transmission of video signals. In building the 3-D graphic...

We study the broadcast transmission of a single file to an arbitrary number of receivers using Random Linear Network Coding (RLNC) in a network with unreliable channels. Due to the increased computational complexity of the decoding process (especially for large files) we apply chunked RLNC (i.e. RLNC is applied within non-overlapping subsets of the file). In our work we show the optimality of t...

Modern wireless communication systems demanding high data rate operating in bandwidth deficient world is using Multiple Input Multiple Output (MIMO) antenna arrangement. MIMO arrangement helping achieving high data rates with a technique of special multiplexing saves bandwidth but needs efficient receivers with manageable hardware. The receivers employing linear equalizers or Decision Feedback ...

Introduction: The capability of receivers employing multiple antennas to increase the achievable system capacity and to suppress the effects of co-channel interference has motivated intense research in the field of space-time equalisation [1]. Most contributions, however, focus on sub-optimal linear receivers or investigate the performance of maximum-likelihood sequence estimators (MLSE), which...

In the modern opto-electronic transceiver designs, the high-speed frontend circuits of the optical receivers are considerably focused on the circuit designs. Many different topologies have been published since the optical fiber was applied for transmitting high data rate signal. In the optical transceivers, the transimpedance amplifier (TIA) plays a critical role in converting the input current...

Abstract—In this paper, we investigate the architecture and performance of a decision feedback equalizer (DFE) based multiuser receiver for asynchronous direct sequence code division multiple access (DS-CDMA) systems. The DFE consists of a feedforward filter (FFF) and a feedback filter (FBF) to combat the intersymbol interference (ISI) and multiple access interference (MAI). We use an adaptive,...

This paper deals with a cross-layer design that combines link adaptation in the physical layer with random network coding for layered video multicasting in a cellular system. The objective is to design the optimum signal-to-noise ratio (SNR) threshold for adaptive modulation and coding (AMC) that can satisfy the target frame loss rate (FLS) under a delay constraint associated with real-time mul...