A complex modulo method and device based on a modem

Abstract

The invention discloses a complex number modulo method and device based on a modem, a computer device and a storage medium. The method comprises the steps: obtaining a cosine value and a sine value ofa to-be-processed radio frequency carrier signal, taking one of the cosine value and the sine value as a real part, and taking the other of the cosine value and the sine value as an imaginary part togenerate a complex I + jQ; Correspondingly converting the complex number I + jQ into coordinate points (I, Q) in a rectangular plane coordinate system, and carrying out rotation processing on the coordinate points by adopting a preset algorithm to obtain rotation coordinate points (I1, Q1); Judging whether the value of atan (Q1 / I1) is within a preset angle range or not; And if the value of the atan (Q1 / I1) is within a preset angle range, calculating the modulus of the complex number I + jQ according to a preset modulus calculation formula. Therefore, the consumption of computing resources isreduced on the premise of ensuring the precision of the module.

Description

technical field [0001] The present application relates to the field of digital signal processing, and in particular, to a modem-based complex modulo method, apparatus, computer equipment and storage medium. Background technique [0002] In the field of communication, for example, in the process of digital signal processing, such as in the digital signal processing of modems, it is often necessary to perform the modulo operation on complex numbers. Generally, for the modulo operation of complex numbers, 2 multiplications and 1 square root operation are required, which is a costly calculation. Resources are great. Instead, the prior art uses an approximation algorithm to reduce the amount of calculation, but there are still problems: a lot of computing resources are required, or the calculated modulus is not very accurate. For example, using the CORDIC algorithm to find the modulus of a complex number usually requires multiple rotations (for example, 16 times), which requires...

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Problems solved by technology

[0002] In the field of communication, for example, in the process of digital signal processing, such as in the digital signal processing of modems, it is often necessary to perform modulo calculations on complex numbers. Generally, for complex number modulo calculations, two multiplications and one square root operation are required, which consumes a lot of calculations great resources

Instead, the existing technology uses approximate algorithms to reduce the amount of calculation, but there are still problems: it needs to consume a lot of computing resources, or the accuracy of the calculated modulus is not high

For example, using the CORDIC algorithm to find the modulus of a complex number usually requires multiple rotations (for example, 16 times), which consumes a lot of computing resources; using alpha*max(|x|, |y|)+beta*min(|x |, |y|) to calculate the modulus of the complex number x+jy, although the amount of calculation becomes smaller, the accuracy of the calculated modulus is lower

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