Carrier recovery method based on multi-channel communication receiving system

A technology for communication reception and carrier recovery, applied in multi-carrier systems, transmission systems, digital transmission systems, etc., can solve the problems of unable to continue to lock the phase, the solution structure is complex, and the cost is increased, and the effect of improving the adaptive characteristics is achieved.

Active Publication Date: 2020-04-03
成都米风感知科技有限公司
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AI Technical Summary

Problems solved by technology

[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 the multi-channel communication receiving system, the carrier recovery is performed using digital phase locking. As in the digital carrier recovery system With the increase of the bandwidth of the digital phase-locked loop in the medium, digital phase-locking can reduce the phase noise of the signal and thus reduce the phase jitter; in the multi-channel communication receiving system, a pilot signal is also added for carrier recovery, but the pilot signal is seriously When the ground is weakened or even the pilot signal cannot be detected, the frequency-locked phase-locked method cannot continue to lock the phase; however, as the bandwidth of the digital phase-locked loop increases, more and more additional noise will be generated, and these solution structures Complicated, causing practical difficulties and increasing costs

Method used

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  • Carrier recovery method based on multi-channel communication receiving system

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with specific embodiment:

[0034] A carrier recovery method based on a multi-channel communication receiving system, comprising the following steps:

[0035] The data sent by the transmitter is modulated by DBPSK, and the intermediate frequency sampling rate is increased through digital up-conversion;

[0036] receiving the boosted intermediate frequency sampling data through multi-channel down-conversion, and extracting the received data to reduce the intermediate frequency sampling rate;

[0037] Sorting and transforming the extracted data;

[0038] Perform phase compensation on the sorted and transformed data, and obtain the demodulated signal;

[0039] generating a compensation signal from the demodulated signal;

[0040] The compensation signal compensates the output signal of the transmitter to generate a carrier frequency offset input signal;

[0041] The maximum and minimum values ​​of the...

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Abstract

The invention discloses a carrier recovery method based on a multichannel communication receiving system. The method comprises steps that data sent by a transmitter is modulated by DBPSK and intermediate frequency sampling rate is increased by a digital up converter, and the like. The carrier recovery method solves the problems that the conventional frequency and phase locking method cannot lock phases continuously, more and more additional noise can be produced with increased bandwidth of digital phase locked loop, a structure of a solution is complex, difficulty in actual operation and cost increase can be caused and the like through steps of data extraction, handling and transformation, phase compensation and the like, the self-adaption characteristic of the method is improved, system performance consistency is improved, and production flow is simplified.

Description

technical field [0001] The invention belongs to the technical field of wireless communication. In particular, it relates to a carrier recovery 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 the multi-channel communication receiving system, the carrier recovery is performed using digital phase-locking. As in the digital carrier recovery system With the increase of the bandwidth of the digital phase-locked loop in the medium, digital phase-locking can reduce the phase noise of the signal and thus reduce the phase jitter; in the multi-channel communication receiving system, a pilot signal is also added for carrier recovery, but the pilot signal is seriously When the ground is weakened or even the pilot signal cannot be detected, the frequency-locked phase-loc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/38
CPCH04L27/3836
Inventor 余少波
Owner 成都米风感知科技有限公司
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