ExperimentalExperimental Software Defined Radio Software Defined Radio PlatformsPlatforms

4PSK 8PSK 8QAM

16QAM 32QAM 64QAM

ForFor more more information visit our websiteinformation visit our website::

httphttp://://witwit..mhtmht..bmebme.hu.hu

Wireless InformationTechnology Lab

Bertalan EgedBertalan Eged, et. al., et. al.Budapest Budapest UUniversity of Technology and Economicsniversity of Technology and Economics

DepDepartmenartmentt of Microwave Telecommunicationsof Microwave Telecommunications H-1111 Budapest, H-1111 Budapest, Goldmann GyGoldmann Gy. tér 3. . tér 3. TEL: +36 1 463-TEL: +36 1 463-35143514 FAX: +36 1 463-3289 email: FAX: +36 1 463-3289 email: begedbeged@@mhtmht..bmebme..huhu

FPGA

DSPDUC

DAC

First test platform based on separate demo boards: The first experimental platform allowed us to build up therequired development system and try the basic technologicalcomponents to implement SDR platforms, including:•DSP program design and implementation•FPGA firmware development•Serial communication with ASIC up-converters•DAC high-speed clocking and timing•IF signal oversampling with interpolating DAC

Experimental SDR platform based on ADSP21065 floating-point signal processor, Xilinx XCS40XL (Spartan I) FPGA,AD6622 digital up-converter, AD9772A interpolating DAC

One of our fistapplicationprogram:GSM-EDGEmodulator.

The picture showsthe histogram of this8PSK signal.

In the next phase we integrate the DAC, the DUCsand the FPGA on one PCB module.

Integrated SDR platform containing: ADSP21160 SHARCfloating-point processor, XC2S50 (Spartan II) FPGA,

4X AD6622 DUCs, PIC16F877 micro controller

Technology enhancements:•Integrated uC based platform controller•Direct DMA interface to the DSP bus•FPGA (re)programming with uC•DUC (re)programming trough the platform controller•Implementation of a control scripting possibility

Result of the application developments includescomplete set of higher level vector modulations:

Eye diagram of theI-channel signal ofthe 32QAM vector

modulator