Trigonometric function CORDIC iteration operation coprocessor and operation processing method thereof

It is an iterative operation and co-processor technology, which is applied in the fields of electrical digital data processing, digital data processing components, and instruments.

Active Publication Date: 2011-05-25
TECHTOTOP MICROELECTRONICS
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[0028] For the operation of the above trigonometric functions, the input data of the operation will be limited by the input angle of the Cordic algorithm. According to the analysis of the Cordic algorithm, the iterative operation u

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  • Trigonometric function CORDIC iteration operation coprocessor and operation processing method thereof
  • Trigonometric function CORDIC iteration operation coprocessor and operation processing method thereof
  • Trigonometric function CORDIC iteration operation coprocessor and operation processing method thereof

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[0052] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0053] For trigonometric function calculations, they are all periodic functions, so if the Cordic algorithm can perform trigonometric function calculations of angles between 0 and π / 2, then the calculation can be performed through trigonometric equation transformation. The above-mentioned trigonometric functions all have a period of 2π, and π / 2 ~ 2π can be obtained by transforming the angle of 0 ~ π / 2 through trigonometric equations. Similarly, the angle between π / 2 ~ 2π can also be obtained by the angle Transformed to an angle of 0 ~ π / 2, such as figure 2 shown.

[0054] If 0 ~ 2π is divided in...

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Abstract

The invention relates to a trigonometric function coordinate rotation digital computer (CORDIC) iteration operation coprocessor. The coprocessor comprises a CORDIC iteration operation unit, an operation result output unit and an angle range conversion unit, wherein the CORDIC iteration operation unit performs CORDIC iteration operation according to an input angle and outputs an operation result to the operation result output unit; the angle range conversion unit divides the input angle by pi/2 in the CORDIC iteration operation unit to obtain a quotient and decomposes the quotient into an m part, an n part and a p part; the quotient is 4*m+n+p, m and n are integers, n is more than or equal to 0 and less than or equal to 3, and p is a floating-point number of less than 1; and the CORDIC iteration operation unit performs CORDIC trigonometric function iteration operation on the value of p*pi/2. Through the technical scheme, the trigonometric function CORDIC iteration operation coprocessor supports full-angle trigonometric function operation and has higher operation efficiency.

Description

technical field [0001] The invention relates to a trigonometric function CORDIC iterative operation coprocessor and an operation processing method, in particular to a wireless communication signal floating-point coprocessor including trigonometric function operation. Background technique [0002] At present, the floating-point coprocessors widely used in wireless communication signal processing generally support trigonometric function operations such as sine, cosine, and tangent, and the Cordic algorithm is generally used for coprocessor design. The Cordic algorithm was developed by J.E Volder and named Coordinate Rotation Digital Computer, and it perfected the operations of multiplication, division, logarithm and exponential by extending from circular rotation to rectangular and hyperbolic coordinates. The Cordic algorithm provides a unified way to realize various basic functions, so it has been widely used in the fields of computer and communication. [0003] The Cordic a...

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Application Information

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IPC IPC(8): G06F7/548
Inventor 李松
Owner TECHTOTOP MICROELECTRONICS
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