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Polar coordinate modulation circuit and modulation method thereof

A modulation circuit and modulation method technology, applied in power amplifiers, improving amplifiers to improve efficiency, improving amplifiers to reduce nonlinear distortion, etc., can solve problems such as deteriorating system modulation accuracy

Inactive Publication Date: 2020-04-17
ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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  • Abstract
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Problems solved by technology

[0005] Therefore, the amplitude modulation signal and the mixed high-frequency signal (including phase modulation information) must have a delay difference due to two different processing methods in time (for example, the filter will have a group delay). If the value is too large, it will deteriorate the modulation accuracy of the system. It is necessary to precisely control this delay difference to make the modulation quality meet the design expectations.

Method used

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  • Polar coordinate modulation circuit and modulation method thereof
  • Polar coordinate modulation circuit and modulation method thereof
  • Polar coordinate modulation circuit and modulation method thereof

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Embodiment Construction

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0045] It should be understood that when used in this specification and the appended claims, the terms "comprising" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude one or Presence or addition of multiple other features, integers, steps, operations, elements, components and / or collections thereof.

[0046] It should also be understood that the terminology used in the description...

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Abstract

The invention discloses a polar coordinate modulation circuit and a modulation method thereof. In one embodiment, two methods of delaying N clock periods by a digital clock of a digital part and adjusting the filter group delay by an analog part are combined together, so that the delay difference of two sides is accurately controlled, and the delay difference is as small as possible without influencing the modulation quality. The specific N values of the two sides are adjusted and compensated according to the delay differences of the two sides. According to the invention, the path delay difference between an amplitude signal and a phase signal can be compensated with high precision.

Description

technical field [0001] The invention relates to the technical field of signal modulation, in particular to a polar coordinate modulation circuit and a modulation method thereof. Background technique [0002] Polar modulation (polar coordinate modulation) is increasingly used in RF transmitter architectures because of its higher efficiency. [0003] Such as figure 1 As shown in the structure diagram of a typical Polar modulation transmitter, for the baseband I / Q two-way signal, the polar coordinate conversion is performed through an algorithm to generate amplitude information and phase information respectively; the amplitude information is processed, mainly from digital to analog through DAC conversion , and then filtered and amplified; at the same time, the phase information and the local oscillator together realize the frequency up-conversion; finally, the amplitude modulation information and the mixed high-frequency signal (including the phase modulation information) are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32H03F1/06H03F3/24
CPCH03F1/32H03F1/06H03F3/24
Inventor 潘少辉胡胜发
Owner ANYKA (GUANGZHOU) MICROELECTRONICS TECH CO LTD
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