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Method and device for processing DWA (data-weighted averaging) in digital-to-analogue conversion

A technology of digital-to-analog conversion and data averaging, applied in the field of communication, can solve problems such as THD deterioration and achieve the effect of eliminating influence

Inactive Publication Date: 2013-11-20
HUAWEI TECH CO LTD
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Problems solved by technology

[0006] The purpose of the present invention is to provide a processing method for data averaging in digital-to-analog conversion, aiming to solve the problem of THD deterioration caused by DWA technology in the prior art under the condition of high sampling rate

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  • Method and device for processing DWA (data-weighted averaging) in digital-to-analogue conversion
  • Method and device for processing DWA (data-weighted averaging) in digital-to-analogue conversion

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Embodiment Construction

[0041] In order to make the object, technical solution and beneficial effects of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0042] A kind of processing method of data averaging in digital-to-analog conversion provided by the specific embodiment of the present invention, the method is as follows figure 2 shown, including:

[0043] 200. In digital-to-analog conversion, receive a digital signal (A);

[0044] 201. Judging whether the digital signal (A) is odd or even, and switching the state of the digital state (Z) when it is judged that the digital signal A is odd;

[0045] 202. Determine input data of the DWA loop 1 and the DWA loop 2 according to the state of the digital state (Z).

[0046] The state of t...

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Abstract

The invention is applicable to the field of communication, and provides a method and a device for processing DWA (data-weighted averaging) in digital-to-analogue conversion. The method comprises the following steps: in digital-to-analogue conversion, receiving a digital signal A, judging whether the digital signal A is an odd or even number, and if judging that the digital signal A is an odd number, switching the state of a digital state Z; and according to the state of the digital state Z, determining input data of a DWA loop 1 and a DWA loop2, wherein the state of the digital state Z comprises a first state and a second state. The technical scheme provided by the invention has an advantage of good THD (total harmonic distortion) effect.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a data averaging processing method and device in digital-to-analog conversion. Background technique [0002] Digital-to-analog converter (English: digital to analog converter, DAC for short) design is widely used in the field of digital-to-analog interface. Any application scenario that needs to convert digital signals into analog signals in communication requires a DAC. With the original higher communication bandwidth , the bandwidth requirements of the DAC are also continuously increasing. [0003] For high-speed DAC design, one option is to use sigma delta technology. In the design of sigma delta DAC, data averaging (English: data weighted averaging, DWA for short) technology is generally used to perform first-order shaping on the mismatch of the current mirror to improve Signal-to-noise ratio (English: signal to noise ratio, referred to as: SNR). The first-order shapin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/66
Inventor 郑健华邸岳淼
Owner HUAWEI TECH CO LTD
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