tailieunhanh - Báo cáo hóa học: " Modular Software-Defined Radio"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Modular Software-Defined Radio | EURASIP Journal on Wireless Communications and Networking 2005 3 333-342 2005 Arnd-Ragnar Rhiemeier Modular Software-Defined Radio Arnd-Ragnar Rhiemeier Institut fur Nachrichtentechnik Universitat Karlsruhe TH 76128 Karlsruhe Germany Em ail rhiemeier@ Received 1 October 2004 Revised 14 February 2005 In view of the technical and commercial boundary conditions for software-defined radio SDR it is suggestive to reconsider the concept anew from an unconventional point of view. The organizational principles of signal processing rather than the signal processing algorithms themselves are the main focus of this work on modular software-defined radio. Modularity and flexibility are just two key characteristics of the SDR environment which extend smoothly into the modeling of hardware and software. In particular the proposed model of signal processing software includes irregular connected directed acyclic graphs with random node weights and random edges. Several approaches for mapping such software to a given hardware are discussed. Taking into account previous findings as well as new results from system simulations presented here the paper finally concludes with the utility of pipelining as a general design guideline for modular software-defined radio. Keywords and phrases flexible digital baseband signal processing firmware support for reconfiguration computing resource allocation multiprocessing modeling of SDR software. 1. INTRODUCTION Software-defined and hardware reconfigurable radio systems have attracted more and more attention recently because they are expected to be among the key techniques to serving future wireless communication market needs. In contrast to the strong convergence tendency in wired networks a growing number of standards and communication modes can be observed in wireless access networks. Presumably this trend will prevail eventually due to the natural diversity in service requirements and radio environments. The better the .