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Adaptive anti-multipath broadband demodulator

An anti-multipath and self-adaptive technology, applied in electrical components, transmission systems, etc., can solve the problems of not being able to take into account system receiving performance, application limitations of traditional methods, and channel affecting system receiving performance, etc., to enhance environmental adaptability and transmission. High data rate, light weight effect

Active Publication Date: 2017-09-29
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

However, when there is no multipath interference, the channel estimation error in single-carrier frequency domain equalization will affect the system receiving performance. The anti-multipath transmission scheme using single-carrier frequency domain equalization technology cannot take into account the two cases of multipath fading at the same time. system receiving performance
Therefore, the application of traditional methods is greatly limited

Method used

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  • Adaptive anti-multipath broadband demodulator

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Embodiment Construction

[0026] refer to Figure 1 to Figure 3 , adaptive anti-multipath broadband demodulator, including multipath detection module 100, demodulation module 200, frequency domain equalization module 300, baseband data selection module 400, baseband data processing and interface module 500 and power supply module 600; multipath detection The input port 1 of the module 100 receives the external intermediate frequency signal, and its output port 2 is connected with the input port 1 of the baseband data selection module 400; the input port 1 of the demodulation module 200 receives the external intermediate frequency signal, and its output port 2 is respectively connected with the frequency domain Input port 1 of equalization module 300 is connected with input port 4 of baseband data selection module 400, and its output port 3 is connected with input port 2 of frequency domain equalization module 300 and input port 5 of baseband data selection module 400 respectively; Frequency domain equal...

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Abstract

The invention discloses an adaptive anti-multipath broadband demodulator, which relates to a broadband demodulator device in the field of unmanned aerial vehicle measurement and control, which consists of a multipath detection module, a demodulation module, a frequency domain equalization module, a baseband data It is composed of selection module, baseband data processing and interface module, power supply module and other components. The present invention detects in real time whether there is multipath interference in the data transmission between the UAV and the ground station according to the received signal, and the demodulator automatically selects whether to enable the single-carrier frequency domain equalization module according to the detection result. When there is multipath interference, enabling the single carrier frequency domain equalization module can reduce or eliminate the impact of multipath fading on signal transmission. When there is no multipath interference, bypass the single carrier frequency domain equalization module to ensure the system receiving performance . The invention also has the characteristics of high transmission data rate, excellent performance, high degree of integration, small volume, light weight, convenient use and the like.

Description

technical field [0001] The invention relates to an adaptive anti-multipath broadband demodulator in the field of unmanned aerial vehicle measurement and control, and is particularly suitable for a ground station of an unmanned aerial vehicle under multipath channel conditions as a broadband demodulator device. Background technique [0002] The UAV system usually works in a complex environment. In addition to the main path signal, the data transmission between the UAV and the ground station is often accompanied by multiple reflection paths. Multipath interference will cause frequency selective fading and affect the quality of data transmission. In order to eliminate the impact of multipath interference, the traditional method is to add a single-carrier frequency domain equalization module to the broadband demodulator at the signal receiving end. The response function of the channel compensates for the distortion caused by multipath fading on signal transmission and reduces t...

Claims

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Application Information

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IPC IPC(8): H04B1/7176
Inventor 朱良彬王育红彭继强杨豪陈宇
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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