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Co-spectrum transmission modulation and demodulation device for scatter communication

A co-spectrum transmission, modulation and demodulation technology, applied in the direction of scattering propagation system, transmission system, digital transmission system, etc., can solve the problems of restricting the application of large-capacity scattering communication and occupying spectrum resources, so as to ensure the quality and throughput of business transmission , low demodulation threshold, and the effect of improving spectrum resource utilization

Active Publication Date: 2014-06-25
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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AI Technical Summary

Problems solved by technology

For large-capacity scatter communication, because it occupies a wide spectrum resource, coupled with the frequency isolation between diversity channels, it greatly occupies spectrum resources, thus limiting the application of large-capacity scatter communication, especially networking applications

Method used

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  • Co-spectrum transmission modulation and demodulation device for scatter communication
  • Co-spectrum transmission modulation and demodulation device for scatter communication
  • Co-spectrum transmission modulation and demodulation device for scatter communication

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Embodiment Construction

[0018] refer to Figure 1 to Figure 3 , the present invention consists of auxiliary multiplexer / demultiplexer 1, co-spectrum transmission modulator 2, D / A converter 3, local oscillator module 4, IQ modulator 5, bandpass filter 6, amplifier 7, intermediate frequency amplifier 8, A It consists of a / D converter 9 , a common-spectrum receiving low-threshold demodulator 10 , a digital phase-locked loop 11 and a power supply 12 . figure 1 It is the electrical principle block diagram of the present invention, and embodiment presses figure 1 Connect the lines.

[0019] Auxiliary multiplexer / demultiplexer 1 adds data and clock input from external interfaces A and B to auxiliary overhead, and outputs service information to co-spectrum transmission modulator 2. Co-spectrum transmission modulator 2 adopts time-diversity co-spectrum transmission technology for service The information is baseband modulated to output 2 channels of baseband modulation signals with the same frequency spectr...

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Abstract

The invention discloses a co-spectrum transmission modulation and demodulation device for scatter communication and relates to co-spectrum transmission modulation and demodulation devices in the field of scatter communications, wherein according to the co-spectrum transmission modulation and demodulation devices, spectrum resources and transmitting power are limited, and the demodulation threshold is low. The co-spectrum transmission modulation and demodulation device is composed of an auxiliary multiplexing / de-multiplexing device, a co-spectrum transmission modulator, a D / A converter, a local-oscillation module, an IQ modulator, a band-pass filter, an amplifier, a co-spectrum receiving low-threshold demodulator, an A / D converter, an intermediate-frequency amplifier and other components. By the adoption of the co-spectrum transmission technology on the basis of merging time domain diversity and self-adapting co-spectrum receiving, the spectrum resources occupied by a high-capacity scatter communication system are greatly reduced, and meanwhile high-quality service transmission can be achieved. The co-spectrum transmission modulation and demodulation device for the scatter communication has high-efficiency forward error correction coding and decoding functions, can guarantee the low receiving threshold of equipment and is especially applicable to high-quality and high-throughput service transmission on a beyond-visual-range radio communication link under the condition that the spectrum resources and power are limited.

Description

technical field [0001] The invention relates to a co-spectrum transmission modulation and demodulation device for scattering communication in the field of communication, especially suitable for high-quality, high-throughput transmission services on over-the-horizon wireless fading links under the conditions of limited spectrum resources and limited power information device. Background technique [0002] In traditional scatter communication systems, diversity reception technology is usually used to overcome channel fading, and frequency isolation is used for each transmission and reception channel to obtain a good diversity effect. For large-capacity scatter communication, because it occupies a wide spectrum resource, coupled with the frequency isolation between diversity channels, it greatly occupies spectrum resources, which limits the application of large-capacity scatter communication, especially networking applications. Contents of the invention [0003] The purpose o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H04L1/00H04B7/22
CPCY02D30/70
Inventor 沈斌松温亚萍
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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