Adaptivity and Reconfigurability in Wireless Communications

A key issue of future wireless communication systems is that they have to be adaptive. In the Adaptive Wireless Networking (AWGN) project we aim at the implementation of adaptive wireless communication systems in a heterogeneous reconfigurable System-on-a-Chip (HRSoC). We introduce our methodologies for analyzing and mapping DSP functionality in dynamically reconfigurable heterogeneous hardware. A possible implementation of a multi-mode communication system in the MONTIUM architecture is discussed. Suggestions for future activities in the Adaptive Wireless Networking project are also given

Resource Allocation for A Mobile Application Oriented Architecture

A Montium is a coarse-grained reconfigurable architec-ture designed by the CADTES group of the University of Twente for mobile applications. This paper presents a resource allocation method to allocate variables to storage places and to schedule data movements for the Montium. The resource allocation method exploits lo-cality of reference of the Montium architecture as well as its parallelism.

Complexity analysis for mapping a DRM receiver on a heterogeneous tiled architecture

In this article we present the results of partitioning the OFDM baseband processing of a DRM receiver into smaller independent processes. Furthermore, we give a short introduction into the relevant parts of the DRM standard. Based on the number of multiplications and additions we can map individual processes on a heterogeneous multitile architecture. This architecture can meet both the computational demands as well as the restricted energy budget

Parameter Selection At Run-Time To Optimize Energy Efficiency

Energy efficiency is vital for a mobile terminal. In this paper we investigate how to choose the right parameter settings at run-time so that the energy consumption is minimized while satisfying the required level of service. To use a real world example, the energy consumption of a third generation telephone WCDMA downlink receiver with turbo decoding forward error correction is considered. A trade-off is made between the number of fingers of a rake receiver and the number of iterations of the turbo decoder. A simulation environment is constructed to simulate the system. In this paper we present graphs, with which the trade-off can be easily made

QoS scheduling for energy-efficient wireless communication

Presents a QoS (quality of service) scheduler that assigns bandwidth over a wireless channel such that the amount of energy spent by a mobile device is minimized, while maintaining the QoS of the connections. Energy efficiency is an important issue for mobile computers, since they must rely on their batteries. We have designed and implemented an energy-efficient architecture and MAC protocol for wireless multimedia traffic. The scheduling is based on two mechanisms: (1) short-term transmission frame scheduling that concatenates the uplink and downlink traffic of a mobile device, and (2) long-term scheduling that tries to collect traffic as much as possible within the QoS requirements of the connections. The result is that the transceiver can be in a low-power operating mode for an extended period of time and that the number of operating mode transitions is reduce