Sdr 1

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Sdr 1

  1. 1. Wireless Information Technology Lab Software Radio Platform using Wideband IF Sampled Architecture Bertalan Eged, et. al. Eged, Budapest University of Technology and Economics Department Dep artment of Microwave Telecommunications H-1111 Budapest, Goldmann Gy. tér 3. Gy. TEL: +36 1 463-3514 FAX: +36 1 463-3289 email: beged @mht .bme.hu 463-3514 beged@mht.bme. Software Radio: can be reconfigured for multiple air interfaces (AMPS, GSM, EDGE, CDMAOne, CDMA2000, W-CDMA) & advanced technology through software downloads Digital Radio: scalable hardware platform for software radio application digital analog Using baseband sampling modulation is done in analog domain FPGA As processing and sampling technologies improve, digital moves from the baseband end “towards the antenna” Using IF sampled architecture modulation is done in digital domain Multi-carrier radio: multiple digital upconverters put each carrier at a slightly different IF frequency. DAC DUC Four channels of multi-carrier Digital UpConverter (DUC) are integrated in one chip and four chips can be cascaded for higher channel density DSP Prototype of the software radio platform at WITLab Vector diagram of baseband IQ signals of GSM/EDGE modulation scheme generated by our baseband DSP unit 3D preview of our 16 channel multi-carrier transmitter platform prototype Histogram of GSM/EDGE modulation scheme PCB layout design of the 16 channel transmitter Research goals: design and implement a 16 channel, 16Msps polyphase modulation, 1-2500MHz RF bandwidth software radio platform. For more information visit our website: website: http://wit.mht. bme.hu http://wit.mht. bme.hu

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