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Multi-channel demodulation method based on multi-channel communication receiving system

A technology of communication receiving and demodulation methods, applied in multi-frequency code systems, transmission systems, digital transmission systems, etc., can solve the problems of large inter-carrier interference, large system overhead and delay, and reduced system utilization, and achieve carrier The effects of small inter-interference interference, improved utilization, and avoiding large overhead and delay

Active Publication Date: 2020-04-17
成都米风感知科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing technology, the inter-carrier interference is large, and the system overhead and delay of feedback control information in this way are relatively large, which reduces the utilization rate of the system.

Method used

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  • Multi-channel demodulation method based on multi-channel communication receiving system

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Embodiment Construction

[0036] The present invention will be further described below in conjunction with specific embodiments:

[0037] A multi-channel demodulation method based on a multi-channel communication receiving system includes the following steps:

[0038] The data sent by the transmitter is modulated by DBPSK;

[0039] Increase the sampling rate of the intermediate frequency to 819.2khz through digital up-conversion;

[0040] Modulate to 400hz carrier;

[0041] Multi-channel down-conversion received data 1 / 2 extraction, and the intermediate frequency sampling rate is reduced to 409.6khz;

[0042] Organize the extracted data;

[0043] Organize and transform the extracted data;

[0044] Perform phase compensation on the sorted and transformed data.

[0045] Further, the step of DBPSK modulation of the data sent by the transmitter is specifically as follows:

[0046] Get differential encoding through differential encoder;

[0047] Perform level conversion to obtain -1, +1 code information;

[0048] Perform BP...

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Abstract

The invention discloses a multi-channel demodulation method based on a multi-channel communication receiving system. The method comprises the steps as follows: data sent by a transmitter is modulated by DBPSK. The system provided by the invention has better performance and smaller interference between carriers than an existing system, the technical problem of relatively large overhead and delay for feeding back control information is effectively avoided, system overhead is reduced, and feedback delay of the control information is reduced, and a utilization rate of downlink power of the system is improved.

Description

Technical field [0001] The invention belongs to the field of wireless communication technology. Specifically, it relates to a multi-channel demodulation method based on a multi-channel communication receiving system. Background technique [0002] The multi-channel demodulation of the multi-channel communication receiving system is the process of recovering the message from the modulated signal carrying the message. In various information transmission or processing systems, the sender modulates the carrier with the message to be transmitted to generate a signal carrying this message. The receiving end must recover the transmitted message before it can be used. First, move the spectrum that carries useful information near the carrier to the baseband, and then filter out the baseband signal with a corresponding filter to complete the demodulation task. However, the resource allocation and other control information in the multi-channel communication receiving system need to be dem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L27/00
CPCH04L27/0014H04L27/265H04L2027/0026
Inventor 余少波
Owner 成都米风感知科技有限公司