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Automatic gain control method based on joint detection

An automatic gain control and joint detection technology, applied in the field of communication, can solve the problems of poor availability of actual communication, low reliability of detection results, and inability to take into account the speed and stability of convergence at the same time.

Active Publication Date: 2020-06-09
磐基技术有限公司
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Problems solved by technology

[0004]The disadvantage of the above-mentioned conventional detection method is that the single power level detection cannot take into account the problems of convergence speed and stability at the same time, the reliability of the detection results is low, and the reliability of actual communication Poor usability

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  • Automatic gain control method based on joint detection
  • Automatic gain control method based on joint detection
  • Automatic gain control method based on joint detection

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Embodiment Construction

[0056] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0057] An automatic gain control method based on joint detection, comprising: performing saturation state detection processing, peak detection processing, peak-to-average ratio detection processing, filter operation, automatic gain update processing and auxiliary receiver on the strength of the A / D output signal Gain adjustment for symbol timing detection processing; wherein, the results of saturation detection processing, peak detection processing, peak-to-average ratio detection processing, and filtering operations are output to the input end of the automatic gain update processing module, and after gain update processing, the output final needs to be compensated Gain value, to adjust the gain of the A / D output signal; specifically include the following steps:

[0058] Step S1, the initial detection data length t_fre...

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Abstract

The invention discloses an automatic gain control method based on joint detection. The method combines saturation state detection processing, peak detection processing, peak-to-average ratio detectionprocessing and filtering operation processing, quickly and stably outputs a receiver signal, is quick in algorithm convergence, and is highly controllable in hardware real-time performance. Furthermore, in saturation judgment and counting, saturation counting is combined with a timer to work at the same time. On one hand, it is ensured that the current gain can be attenuated at the fastest speedwhen the received signal is oversaturated, and meanwhile, false saturation detection and too long convergence time caused by burst random pulses are prevented. In the peak value judging and counting process, stepped gain compensation is adopted, and the problem of gain variable oscillation caused by single gain compensation is avoided.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to an automatic gain control method based on joint detection. Background technique [0002] In a broadband communication system, due to the influence of various unknown factors such as distance, temperature, weather and obstacles, the signal received by the receiver is not only extremely weak, but also changes indefinitely. In a wired communication system such as network cable or power line communication, due to the complexity and variety of equipment connected to the line, the irregular connection and cut-out of load equipment, and various factors such as cable loss, the types of noise in the wired channel The intensity of the received signal is complex. In order to make the receiver work efficiently, it is necessary to design a digital automatic gain control algorithm to maintain the output at a certain level by automatically adjusting the gain when the input sig...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03G3/30
CPCH03G3/30Y02D30/70
Inventor 胡小菲傅鑫陈宁周博
Owner 磐基技术有限公司
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