DDS (Direct Digital Synthesis) signal generation system and method

A frequency synthesis and generation system technology, applied in the computer field, can solve problems such as poor flexibility, high system cost, and inability to divisible signals, and achieve the effect of low system cost, high flexibility, and few input parameters

Pending Publication Date: 2017-09-15
WUXI HAIYING CAL TEC MARINE TECH
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Problems solved by technology

Therefore, the flexibility is poor
[0009] In addition, when some signal period and clock period are not divisible by the output signal, the above method reali

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  • DDS (Direct Digital Synthesis) signal generation system and method
  • DDS (Direct Digital Synthesis) signal generation system and method
  • DDS (Direct Digital Synthesis) signal generation system and method

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[0048] The exemplary embodiments will be described in detail here, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present invention. Rather, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0049] AR model is also called autoregressive model, which completes the establishment of signal model by recursive input signal sequence, and thus completes signal generation, processing and other functions. As follows:

[0050] Y(n)=A1*Y(n-1)+A2*Y(n-2)+……Am*Y(n-m)

[0051] Among them, A1, A2, ... Am, etc. are different system constants, Y(n), Y(n-1), Y(n-m) are signal sequences at...

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Abstract

The invention relates to a DDS (Direct Digital Synthesis) signal generation system and method, and belongs to the field of computer technologies. Same-frequency orthogonal DDS signals can be generated by only utilizing a second-order AR model according to the DDS signal generation method. The DDS signal generation method is applicable to any frequency, is low in system cost, extremely small in number of input parameters, extremely high in flexibility and particularly applicable to orthogonal down conversion for sonar signals with the frequency being adjusted at any time, and has great popularization values.

Description

technical field [0001] The invention belongs to the technical field of computers, and in particular relates to a DDS signal generation system and method. Background technique [0002] With the continuous development of oceanographic measurement technology, multi-beam echo sounders have been widely used for their high sounding efficiency, good measurement effect, and no omission measurement. Therefore, the application range of multi-beam echo sounder is constantly expanding. On the basis of importing a large number of foreign multi-beam echo sounders and widely using them, our country has accumulated a lot of experience and technology in application and technology. In recent years, the research and development of domestic multi-beams has also been gradually carried out. [0003] In the process of multi-beam signal processing, the orthogonal down-conversion signals of multiple channels of multi-beam must be obtained first. This is generated by mixing with a phase quadrature...

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Application Information

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IPC IPC(8): H03K3/02H03K5/01G06F1/02
CPCH03K3/02H03K5/01G06F1/022
Inventor 郭榕
Owner WUXI HAIYING CAL TEC MARINE TECH
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