Software Defined Modem for Cognitive Radio with Dynamically Reconfigurable Processor

Ren SAKATA  Daisuke TAKEDA  Noritaka DEGUCHI  Tatsuma HIRANO  Takashi YOSHIKAWA  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.3   pp.810-818
Publication Date: 2012/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.810
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Transmission Systems and Transmission Equipment for Communications
software defined radio,  reconfigurable processor,  3GPP long term evolution,  

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Software Defined Radio (SDR) techniques are expected to be among the key technologies of heterogeneous cognitive radio networks for realizing efficient and convenient wireless communications by providing multiple radio services to users and decreasing development costs. In this paper, in order to evaluate the feasibility of SDR modems, we study the amount of computing throughput of a recent wireless system and determine a suitable modem architecture. Firstly, the functions for which SDR techniques provide significant benefits are clarified. Secondly, the computing throughputs are measured under the assumption that a dynamically reconfigurable processor, FlexSwordTM, is employed. Finally, based on a consideration of timing charts, we propose the architecture of an SDR-based modem with FlexSword. The possibility of implementing several wireless systems is also considered.