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Universal frequency modulator and frequency modulation method and device

A technology of frequency modulation and modulator, which is applied in the field of general frequency modulator and frequency modulation and device, and can solve difficult problems such as wideband and narrowband frequency modulation

Active Publication Date: 2021-08-06
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although frequency modulator architectures based on binary all-digital phase-locked loops that do not require high-resolution digital-to-time converters have been recently proposed for wired and wireless systems, most of them struggle to simultaneously implement wideband and narrowband frequency modulation in the same modulator

Method used

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  • Universal frequency modulator and frequency modulation method and device

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Embodiment 1

[0023] Embodiments of the present disclosure provide a general-purpose frequency modulator, including:

[0024] A configurable all-digital phase-locked loop, the all-digital phase-locked loop includes two loops: loop A and loop B;

[0025] The loop A includes: a first binary phase detector, a first digital loop filter, a numerically controlled oscillator, a first dual-mode frequency divider, a first differential integral modulator, a first digital time converter, The first integer frequency divider; the loop B includes: a second binary phase detector, a second digital loop filter, a second dual-mode frequency divider, a second differential integral modulator, a second digital time converter, second integer divider;

[0026] The output end of the first digital loop filter of the loop A is connected to the input end of the numerically controlled oscillator; the output signal of the numerically controlled oscillator is respectively input to the first dual-modulus frequency divid...

Embodiment 2

[0065] Embodiments of the present disclosure also provide a universal frequency modulator, which is a universal frequency modulator based on a reconfigurable all-digital phase-locked loop, such as figure 1 shown. According to whether the desired output modulation signal is a narrowband modulation signal or a wideband modulation signal, the internal all-digital phase-locked loop is reconfigured to form two topological structures corresponding to the modulation signal, and finally the frequency modulation of the signal is completed by two-point modulation technology. The configurable all-digital phase-locked loop used consists of two loops: Loop A and Loop B. When outputting a narrowband modulation signal, only loop A works, and the finite impulse response filter of the numerically controlled oscillator in loop A is turned on; when outputting a wideband modulation signal, loop B is also turned on at the same time, recombining with loop A. A new frequency modulator (topology) is...

Embodiment 3

[0084] Embodiments of the present disclosure also provide a frequency modulation method, including:

[0085] According to the bandwidth modulation requirement, the working states of loop A and loop B in the general frequency modulator as described above are controlled, so as to realize different configurations of the topological structure of the all-digital phase-locked loop. The output terminal obtains the corresponding frequency modulation signal;

[0086] Wherein, the bandwidth modulation requirement includes: wideband modulation and narrowband modulation.

[0087] In some exemplary embodiments, according to bandwidth modulation requirements, the working states of loop A and loop B in the universal frequency modulator are controlled to achieve different configurations of the topology of the all-digital phase-locked loop, including:

[0088] When the bandwidth modulation requirement is narrowband modulation, control the loop B to close, the loop A to open, and configure the...

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Abstract

The embodiment of the invention provides a universal frequency modulator and a frequency modulation method and device. The general frequency modulator comprises a configurable all-digital phase-locked loop, and the all-digital phase-locked loop comprises two loops, namely a loop A and a loop B; the loop A comprises a binary phase discriminator, a digital loop filter, a numerical control oscillator, a dual-mode frequency divider, a differential integral modulator, a digital time converter and an integer frequency divider; the loop B comprises other parts, except the numerical control oscillator, in the loop A; the output end of the digital loop filter in the loop A is connected with the input end of the numerical control oscillator; output signals of the numerical control oscillator are respectively input into the dual-mode frequency dividers in the loop A and the loop B; and the output end of the digital loop filter in the loop B is connected with the input end of the differential integral modulator in the loop A.

Description

technical field [0001] The present disclosure relates to, but is not limited to, the field of radio frequency integrated circuits, and in particular, to a universal frequency modulator based on a reconfigurable all-digital phase-locked loop, and a frequency modulation method and device. Background technique [0002] At present, both in wireless communication and wired communication applications, phase-locked loops have been widely used due to their simple structure and superior performance, ranging from clock data recovery and spread spectrum in wired communication systems to wireless communication applications. frequency synthesis, etc. The digital phase-locked loop is not plagued by serious matching accuracy or leakage current problems like the analog phase-locked loop, which makes it easier to transplant and expand in the process and has better process compatibility. At the same time, the realization of digitization makes it possible to have low power supply voltage, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/099H03L7/18
CPCH03L7/099H03L7/18Y02D30/70
Inventor 李宇根万子祥王志华
Owner TSINGHUA UNIV
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