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Multi-amplitude digital pulse spacing modulation device

A pulse interval modulation, digital pulse technology, applied in the field of optical communication, can solve the problems of reducing the life of the driving unit, increasing the temperature, and unable to provide the driving current, and achieve the effect of prolonging the working life and reducing the working time.

Inactive Publication Date: 2010-11-10
NAVAL UNIV OF ENG PLA
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Problems solved by technology

However, this structure has the following defects: First, due to the change time between the driving currents of different amplitudes, the driving unit cannot provide a stable amplitude of the driving current when the modulation speed is high, so that it cannot provide a stable amplitude of light. Second, the drive unit provides high-frequency pulse currents with multiple amplitude changes for a long time, which will reduce the life of the drive unit; third, because there is only one drive unit and one light source, working for a long time, each device continues to generate heat and the temperature rises. High, affecting work performance

Method used

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Embodiment Construction

[0017] Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements. As described above, the present invention provides an MDPIM device with high modulation frequency, stable luminous performance and long working life.

[0018] The technical solutions of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Such as figure 1 As shown, the MDPIM device in this embodiment includes a modulation module 10 and a light emitting module 20 . The modulation module 10 has multiple enabling terminals 1a. The light emitting module 20 includes more than two groups of driving units 2a and light emitting units 2b, and the light emitting units 2b are respectively connected to different enabling terminals 1a through corresponding driving units 2a. The modulation module 10 is used for performing multi-amplitude pulse interval modulation on ...

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Abstract

The invention discloses a multi-amplitude digital pulse spacing modulation device which comprises a modulation module and a light emission module. The modulation module is provided with a plurality of enable pins, the light emission module comprises more than two groups of driving units and light emission units, the light emission units are respectively connected with different enabling ends through the corresponding driving units, and the modulation module is used for carrying out multi-amplitude pulse spacing modulation for a received digital sequence and enabling the corresponding driving units according to modulated signals. The device has high modulation frequency, stable luminous performance and long working life.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a multi-amplitude digital pulse interval modulation (MDPIM, Multi-Digital Pulse Interval Modulation) device. Background technique [0002] Multi-amplitude digital pulse interval modulation has high bandwidth utilization and power utilization, that is, the average transmitted optical power required to achieve the specified error performance under the condition of transmitting certain binary data is small, the required bandwidth is small, and it provides built-in bit synchronization Information, especially suitable for optical communication systems with limited bandwidth and power. [0003] The multi-amplitude digital pulse interval modulation device in the existing optical communication system usually uses a driving unit to provide different magnitudes of driving current to drive a single light source to emit light with different light intensity amplitudes, and its structure i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B14/02H04B10/12H04B10/556
Inventor 魏巍饶炯辉张晓晖邓荣
Owner NAVAL UNIV OF ENG PLA
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