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Digital frequency synthesis method and device

A technology of digital frequency synthesis and signal synthesis, which is applied in the direction of electrical digital data processing, digital function generators, digital data processing components, etc., and can solve problems such as large errors

Active Publication Date: 2021-03-02
GUANGZHOU HAIGE COMM GRP INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a digital frequency synthesis method and device for the problem of large errors in traditional direct digital frequency synthesizers

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  • Digital frequency synthesis method and device
  • Digital frequency synthesis method and device

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preparation example Construction

[0062] see figure 2 , figure 2 It is a schematic flowchart of a digital frequency synthesis method according to an embodiment of the present invention. Digital frequency synthesis method in this embodiment, comprises the following steps:

[0063] Step S210: Obtain phase control word values ​​of each phase control word of the signal to be synthesized.

[0064] In this step, the phase control word includes a multi-bit phase control word value, and the phase control word value can be represented by a binary value.

[0065] In one embodiment, step S210 may include the following steps: obtaining the phase control word value of the unit phase control word according to the frequency parameter of the signal to be synthesized and the frequency parameter of the reference clock signal; when the reference clock signal arrives, the unit phase control word The value is accumulated, and the accumulated phase control word value is used as the phase control word value.

[0066] Specifica...

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Abstract

The present invention relates to the technical field of digital signal processing, in particular to a digital frequency synthesis method and device. By obtaining the phase control word values ​​of each phase control word of the signal to be synthesized; dividing each phase control word value according to the high and low bits to obtain several address control word values, wherein the address control word value includes a multi-bit phase control word value; using The address control word value is used for digital frequency synthesis of the signal to be synthesized. This scheme divides the phase control word value into multiple address control word values, and performs digital frequency synthesis on the signal to be synthesized, realizes digital frequency synthesis using all bit width information of the phase control word, avoids phase truncation, and improves frequency synthesis efficiency. accuracy, reducing phase noise and spuriousness.

Description

technical field [0001] The present invention relates to the technical field of digital signal processing, in particular to a digital frequency synthesis method and device. Background technique [0002] Direct Digital Frequency Synthesis (DDS) technology is used to generate ultra-low phase noise, high-precision arbitrary waveform signals, and is the core module of various fast frequency scans, modems, and mixers. [0003] In traditional direct digital frequency synthesizers, high-speed memory is often used as a look-up table (Look-up-Table, LUT) of sine-cosine waveform data to realize phase-to-amplitude conversion. In order to compress the scale of the sine-cosine waveform data look-up table, The phase control word intercepts high-order phase information for frequency synthesis, resulting in large phase noise and spuriousness. Contents of the invention [0004] Based on this, it is necessary to provide a digital frequency synthesis method and device for the problem of larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F1/03
CPCG06F1/0342
Inventor 潘未庄牟传坤夏效禹叶韬成邹瑜王甲池
Owner GUANGZHOU HAIGE COMM GRP INC