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Adjustable pulse forming method based on DDS technology

A pulse shaping and technical technology, applied in the field of optical communication, can solve the problem of ignoring the variable control of pulse edge, and achieve the effect of reducing the complexity of logic design, flexible setting of storage depth and data bit width, and avoiding complex design process.

Active Publication Date: 2022-05-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

The end point of the current waveform synthesis technology is how to control the timing characteristics such as the frequency and width of the generated waveform, ignoring the variable control of the pulse edge shape

Method used

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  • Adjustable pulse forming method based on DDS technology
  • Adjustable pulse forming method based on DDS technology
  • Adjustable pulse forming method based on DDS technology

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Embodiment

[0056] figure 2 It is the principle diagram of an adjustable pulse shaping method based on DDS technology of the present invention.

[0057] The conventional feedback integration structure is relatively difficult to shape nonlinear edges. Combined with the idea of ​​DDS to generate arbitrary waveforms, adding a ROM memory module to the structure of the feedback integration method can realize a variety of adjustable pulse edge shaping; in this embodiment , The adjustable pulse shaping based on DDS technology is mainly aimed at the shaping of single-shaped edge pulses and the shaping of multi-shaped edge pulses. The required edge function data is stored in the ROM, and the accumulated amount output by the accumulator becomes the read address input to the ROM. , so as to form a DDS-based feedback look-up table method. Below we describe the two molding methods in detail, such as figure 2 As shown, since the data stored in the ROM is pre-generated, the final pulse shape generat...

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Abstract

The invention discloses an adjustable pulse forming method based on a DDS (Direct Digital Synthesizer) technology, which comprises the following steps: taking the shape of a pulse edge and a pulse as a whole, loading edge shape data into a memory of an ROM (Read Only Memory), and changing an accumulated quantity output by an accumulator into a read address input to the ROM, thereby forming a feedback table look-up method based on the DDS. And the pulse shape finally generated by the forming module is only related to the data waveform, so that the forming of any edge pulse can be universally realized by adopting a feedback look-up table method of the DDS.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and more particularly, relates to an adjustable pulse shaping method based on DDS technology. Background technique [0002] Modern communication systems have higher and higher requirements on the signal-to-noise ratio of communication channels, and digital transmission methods with low bandwidth occupation and high speed have become the main research directions. In the digital baseband signal processor, the pulse shaping technology is of great significance to improve the channel utilization rate and reduce the crosstalk. [0003] The analog circuit uses an analog filter to complete the pulse shaping function in the baseband pulse shaping. This type of circuit can design the corresponding active or passive filter according to the channel bandwidth requirements of the transmission signal to realize the edge shaping of the baseband signal. [0004] The digital method for the edge form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04B10/524
CPCH04L25/03834H04B10/524
Inventor 李力张朋黄建国麻中惠陈嘉铭康稚林
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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