Arctan, full name of Arctangent: refers to the arc tangent function, which is a kind of inverse trigonometric function, that is, the inverse function of tangent function. Higher mathematics in general universities is involved.

Arctan, English' ɑ:kt? n； American ι: kt? n

Arc tangent, called arc tangent, refers to arc tangent function, which is an inverse trigonometric function, that is, the inverse function of tangent function. Higher mathematics in general universities is involved.

Example:

The arctangent and PLL digital RDC algorithms are studied.

Two traditional digital RDC algorithms, arc tangent method and phase-locked loop method, are studied.

Because CORDIC algorithm can transform arc tangent function and circle angle into addition and shift operation, the new model proposed in this paper can complete frequency offset estimation and correction simultaneously in digital domain.

Because the CORDIC algorithm can transform the complex arc tangent function solution and angle rotation operation into simple shift and addition operation, the synchronization model given in this paper can complete frequency offset estimation and frequency offset correction simultaneously in the digital domain.

LFM can be demodulated by the same algorithm as FM, and the demodulated signal is sawtooth, so the period of LFM can be estimated, but the modulation slope cannot be estimated because of arc tangent operation. ?

LFM signal can be demodulated by FM, and the demodulated signal is sawtooth wave, from which the modulation signal period can be obtained, but the arc tangent operation in the algorithm can not get the modulation slope of LFM. ?