Student: Vikas Agarwal Guide: Prof H S Jamadagni

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Presentation transcript:

Student: Vikas Agarwal Guide: Prof H S Jamadagni SOFTWARE RADIO Student: Vikas Agarwal Guide: Prof H S Jamadagni

Review Software radio does not imply removal of hardware. Means replacement of ASIC’s with flexible and re-configurable hardware to program radio parameters like BW, center freq, modulation-demodulation scheme, filtering, bitstream processing.

Project Concept

Project Concept

Project Concept

Project Concept

Project Concept

Project Concept PCI or USB 2.4 GHz Link Software Radio Card

Project Concept PCI or USB 2.4 GHz Link Software Radio Card A software radio card having PCI or USB interface to PC with programmable capability for various air interface standard for e.g. 802.11 WLAN STD

And Digital Down Converter Wideband A/D and D/A Converter Basic Block Diagram FPGA Bitstream Processing and Filtering Modulation and Demodulation IF processing PC PCI or USB Interface Modulation Independent Front End Upconverter Downconverter LNA Power Amplifier T/R switch Digital Up Converter And Digital Down Converter Wideband A/D and D/A Converter

And Digital Down Converter Wideband A/D and D/A Converter Basic Block Diagram FPGA Bitstream Processing and Filtering Modulation and Demodulation IF processing PC PCI or USB Interface Modulation Independent Front End Upconverter Downconverter LNA Power Amplifier T/R switch Digital Up Converter And Digital Down Converter Wideband A/D and D/A Converter

Why DUC and DDC ?… Does equivalent function of mixer, local oscillator, channel – select filter in traditional analog radio receivers

Current Technology Challenge Move ADC and DAC as close as possible to Antenna so that all the processing can be done digitally.

ADC Design

DAC Design

Front-End Design MAX2422 RF 2.4 GHz UP Converter MAX2671 PA IF 70 MHz T/R SWITCH 2.4 GHz Local Oscillator MAX2750 RF 2.4 GHz DOWN Converter MAX2681 IF 70 MHz LNA MAX2644

Work Done System study Study Complexity Involved Components identified ADC and DAC card design Front end 2.4 GHz Link Design DDC and DUC Chipsets studied PCB Design

Future Work FPGA card with USB or PCI interface with PC Study various air interface standard e.g 802.11 WLAN Implementation in FPGA System Integration Testing

THANK YOU