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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

Active Publication Date: 2017-02-08
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0013] The digital cosine signal is generated by the cosine and difference product formula, although the amount of calculation is less than that of the coordinate rotation digital calculation (CORDIC) method, but its accuracy is low

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  • A method of generating digital cosine signal
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  • A method of generating digital cosine signal

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Embodiment Construction

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings.

[0024] refer to figure 1 , figure 1 Shown is a flowchart of an embodiment 100 of the method of generating a digital cosine signal of the present invention. Embodiment 100 includes steps 101 to 104 as follows.

[0025] In step 101, a sequence of phase values ​​for generating a digital cosine signal is calculated.

[0026] In an embodiment of the present invention, step 101 may further include steps 201 to 209 as follows.

[0027] refer to figure 2 , figure 2 Shown is a flow chart of one embodiment of calculating a sequence of phase values ​​for generating a digital cosine signal in the process of generating a digital cosine signal according to the present invention.

[0028] In s...

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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.

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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F1/02
Inventor 武畅谢翔李玉柏唐佩王磊
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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