Trigonometric value determiner, determining method and telecommunicating apparatus therewith

Abstract

A confirmation device of triangular function value consists of triangular function table storage unit for storing said triangular function table and fixed-point triangular function value, normalization-processing unit for carrying out normalization treatment on fixed-point input angle, digit obtaining unit for obtaining two adjacent bits, triangular function confirmation unit for querying fixed-point triangular function value in triangular table according to two said adjacent bits and normalization treated fixed-point input angle.

Description

technical field [0001] The present invention relates to the field of electronic computing devices, and more specifically, relates to a trigonometric function value determining device, method and communication device using the same. Background technique [0002] Modern communication systems are usually implemented based on one of digital signal processing (DSP), field programmable gate array (FPGA), application-specific integrated circuit (ASIC), or a combination of some of them. In modern communication systems, modulators, time-frequency synchronization modules, channel equalization modules, and some other modules in actual communication systems usually require a large number of sine and cosine operations. As the bandwidth of modern communication systems is getting wider and wider, the amount of data that needs to be processed per unit time is increasing, which puts forward high requirements for the speed and effectiveness of periodic operations such as sine and cosine. In ...

AI Technical Summary

Problems solved by technology

Especially in systems that need to calculate a large number of sine and cosine values, frequent branch logic judgments increase the demand for computing resources, increase system costs, and have a great impact on system performance optimization and execution efficiency.

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