A pre-distortion method to reduce DDS spurious

Author

Delos, Peter L. ; Leonard, Douglas A. ; Spada, Joseph M.

Author_Institution

Lockheed Martin Corp., Moorestown, NJ, USA

fYear

2014

fDate

1-6 June 2014

Firstpage

1

Lastpage

4

Abstract

We present a pre-distortion method for suppression of direct digital synthesizer (DDS) spurious. The method has been implemented in a field programmable gate array (FPGA) architecture with the FPGA generating the DDS waveform and controlling a high speed digital to analog converter (DAC). A generic approach is provided, followed by a detailed example. Measured data will be shown for a continuous wave (CW) case and a linear frequency modulated (LFM) waveform. It will be demonstrated that a practical calibration can achieve over 20dB spurious improvement.

Keywords

digital-analogue conversion; direct digital synthesis; distortion; field programmable gate arrays; CW; DAC; DDS spurious reduction; DDS waveform; FPGA architecture; LFM; continuous wave; direct digital synthesizer; field programmable gate array; high speed digital to analog converter; linear frequency modulated waveform; pre-distortion method; Bit rate; Calibration; Chirp; Clocks; Field programmable gate arrays; Standards; Table lookup; DDS; cancellation; predistortion; spurious;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium (IMS), 2014 IEEE MTT-S International

Conference_Location

Tampa, FL

Type

conf

DOI

10.1109/MWSYM.2014.6848239

Filename

6848239