A method of generating digital cosine signal

A cosine signal and digital technology, applied in the field of digital cosine signal generation, can solve the problem of low precision, achieve the effect of overcoming low precision and reducing the amount of calculation
CN103901940BActive Publication Date: 2017-02-08UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2017-02-08

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Abstract

The invention discloses a method for generating a digital cosine signal, which belongs to the field of digital baseband communication. The method comprises: calculating a phase value sequence for generating a digital cosine signal; determining an interpolation point in the phase value sequence; generating a digital cosine signal corresponding to the interpolation point by a coordinate rotation digital calculation method; and generating a cosine sum difference formula The digital cosine signal corresponding to other points in the sequence of phase values. The method of the invention can ensure the accuracy of the generated digital cosine signal while reducing the amount of computation.
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Description

technical field

[0001] The invention relates to the technical field of signal generation, in particular to a method for generating a digital cosine signal. Background technique

[0002] In digital communication systems, it is usually necessary to generate digital cosine signals.

[0003] One existing method for generating a digital cosine signal is the Coordinate Rotation Digital Computation (CORDIC) method. In "Telemetry and Remote Control" published in November 2007, entitled "Research and Implementation of CORDIC Method", the author is Geng Dan's paper, and Kong Deyuan's master's degree thesis of Central South University published in June 2008 "For Sine and Cosine Calculation Optimization of the CORDIC Method and Its FPGA Implementation", both disclose how to use the coordinate rotation digital calculation (CORDIC) method to generate a digital cosine signal.

[0004] Generally speaking, the coordinate rotation digital calculation (CORDIC) method uses the following two s...

Claims

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