DDS Based Multi Channel Radar Waveform Generator
B.Suresh1, M.V.Srikanth2

1B.Suresh, M. Tech (ES) Student, Department of ECE., Gudlavalleru Engineering College, Gudlavalleru (A.P.), India.
2Mr. M.V. Srikanth, Assistant Professor, Gudlavalleru Engineering College, Gudlavalleru (A.P.), India.

Manuscript received on 21 July 2013 | Revised Manuscript received on 28 July 2013 | Manuscript published on 30 July 2013 | PP: 86-88 | Volume-2 Issue-3, July 2013 | Retrieval Number: C0722072313/2013©BEIESP
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Abstract: A radar waveform generator is designed and it is implemented by using directly digital modulation method based on DDS. It can generate arbitrary signals whose amplitude, frequency or phases are controlled by the description words given from an external computer. Accurate waveforms can be generated. We can generate waveforms digitally by using Direct digital synthesis technique. DDS principles of the technique are simple and widely applicable. Direct Digital Synthesizer (DDS) is a frequency synthesizer which can generate arbitrary waveforms from a single, fixed-frequency reference clock. DDS Applications include: function generators, modulators. Here in order to implement radar waveform generator along with DDS we need FPGA and microcontroller. In order to generate the waveform using DDS we need to store the hexadecimal data into the internal registers of DDS chip along with that we need some control signals which will be generated using FPGA . First from PC we need to send the hexadecimal data through serial port for that we need design a Graphical User Interface (GUI).In GUI we will enter the amplitude, phase and frequency of the waveform to be generated and then it has to covert it into particular hexadecimal data based on the formulas mentioned in the datasheet, then it has to send the data through serial port. Now, microcontroller has to receive the data from PC and then it has to send the data to the FPGA. FPGA has to receive that data, along with that it has to generate some control signals based on the control signals, received data will be send to the internal registers of DDS chip.
Keywords: Direct Digital Synthesizer (DDS), FPGA Microcontroller

Scope of the Article: Logic, Functional programming and Microcontrollers for IoT