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Design and realization of numeric controlled oscillator based on FPGA

Kaixiong Su

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Abstract

This paper introduces a method of realization of the numeric controlled oscillator(NCO) used in quadrature digital mixer with the CORDIC(COordination Rotation DIgital Computer) algorithm based on vector rotation. Firstly,the principle of producing sine and cosine signal with CORDIC algorithms is given.And then a top-layer circuits structure of NCO in FPGA is presented.Finaly,a pipeline design is introduced according to the characteristic of the algorithm.

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What this paper is about

This paper introduces a method of realization of the numeric controlled oscillator(NCO) used in quadrature digital mixer with the CORDIC(COordination Rotation DIgital Computer) algorithm based on vector rotation. Firstly,the principle of producing sine and cosine signal with CORDIC algorithms is given.And then a top-layer circuits structure of NCO in FPGA is presented.Finaly,a pipeline design is introduced according to the characteristic of the algorithm.

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Available abstract

This paper introduces a method of realization of the numeric controlled oscillator(NCO) used in quadrature digital mixer with the CORDIC(COordination Rotation DIgital Computer) algorithm based on vector rotation. Firstly,the principle of producing sine and cosine signal with CORDIC algorithms is given.And then a top-layer circuits structure of NCO in FPGA is presented.Finaly,a pipeline design is introduced according to the characteristic of the algorithm.

Key concepts: CORDIC, Realization (probability), Field-programmable gate array, Sine, Pipeline (software), Trigonometric functions, Rotation (mathematics), Quadrature (astronomy)

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