A FPGA-Based Numerically Controlled Oscillator without Spurious Component

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Provided by: International Journal of Engineering Sciences & Research Technology (IJESRT)
Topic: Hardware
Format: PDF
Direct Digital Synthesizers (DDSs), or Numerically Controlled Oscillators (NCOs), are important components in many digital communication systems, such as digital radios and modems, software-defined radios, digital down/up converters for cellular and PCS base stations, etc. A common method for digitally generating a complex or real valued sinusoid employs a lookup table scheme. In this paper, a variable system clock technique and variable module counter based on current FPGA clock management technology is proposed for NCO implementation.
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