A Software Radio Receiver with Direct Conversion and Its Digital Processing

Robert MORELOS-ZARAGOZA  Shinichiro HARUYAMA  Masayoshi ABE  Noboru SASHO  Lachlan B. MICHAEL  Ryuji KOHNO  

IEICE TRANSACTIONS on Communications   Vol.E85-B   No.12   pp.2741-2749
Publication Date: 2002/12/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Software Defined Radio Technology and Its Applications)
software defined radio (SDR),  direct conversion,  design methodology,  

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This paper discusses a design methodology suitable for the development of software defined radio platforms. A flexible digital receiver was designed and implemented using a multi-port direct converter and an FPGA-based platform. The design starts with a hardware-oriented top-level system model. The model is built based on basic signal processing blocks connected together in a graphical tool. Carrier symbol timing recovery is implemented in the discrete-time (digital) domain with an interpolator-based synchronizer. Carrier phase and frequency are recovered using a feedback synchronization algorithm (a second-order type-II digital PLL). Experimental results of the platform and its simulation results demonstrate the effectiveness of the proposed design methodology.