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Digital front-end system for suppressing narrowband interference and its suppression method

A narrowband interference, digital front-end technology, applied in the field of OFDM communication systems, can solve the problems of difficult signal gain control, unsuccessful demodulation, signal saturation, etc., to avoid signal saturation blocking the channel, increase the anti-narrowband interference ability, and prevent the gain from being too high. small effect

Active Publication Date: 2022-03-04
南通市门海微电子有限公司
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AI Technical Summary

Problems solved by technology

Signal gain control can be difficult when narrowband interference is present
If the gain is too large, narrowband interference will cause signal saturation, and effective signals cannot enter the baseband demodulation
If the gain is too small, the effective signal cannot be amplified to the receiving sensitivity of the baseband, nor can it be successfully demodulated

Method used

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  • Digital front-end system for suppressing narrowband interference and its suppression method
  • Digital front-end system for suppressing narrowband interference and its suppression method

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Embodiment

[0031] Embodiment: The following will clearly illustrate this case with drawings and detailed descriptions. After any person skilled in the art understands the embodiment of this case, he can change and modify it by the technology taught in this case without departing from the spirit of this case. with range.

[0032] See attached figure 1 As shown, a digital front-end system for suppressing narrowband interference; including variable gain amplifiers, analog-to-digital converters, band-stop filters, automatic gain controllers, digital band-pass filters, baseband processors, and spectrum analyzers.

[0033] Wherein, the output of the variable gain amplifier is electrically coupled to the input of the analog-to-digital converter; the first output of the analog-to-digital converter is electrically coupled to the first input of the band-stop filter, and the analog-to-digital The second output of the converter is electrically coupled to the input of the spectrum analyzer; the firs...

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Abstract

A digital front-end system for suppressing narrow-band interference and its suppression method, the system includes a variable gain amplifier, an analog-to-digital converter, a band-stop filter, an automatic gain controller, a digital band-pass filter, a baseband processor, and a spectrum analysis device; compared with the prior art, the present invention proposes a digital front-end structure for suppressing narrowband interference. The front-end structure can reasonably perform gain control when there is narrow-band interference, avoiding signal saturation to block the channel, and preventing the gain from being too small to affect the receiving effect. Effective signals can be extracted to the greatest extent when there is narrow-band interference, and the system's ability to resist narrow-band interference can be increased.

Description

technical field [0001] The invention relates to an OFDM communication system, in particular to a digital front-end system and a suppression method for suppressing narrowband interference. Background technique [0002] In an OFDM communication system, various narrow-band interferences (NBIs) often exist in communication channels. Signal gain control can be difficult when narrowband interference is present. If the gain is too large, narrowband interference will cause signal saturation, and valid signals cannot enter the baseband for demodulation. If the gain is too small, the effective signal cannot be amplified to the receiving sensitivity of the baseband, nor can it be successfully demodulated. [0003] Therefore, how to solve the above-mentioned deficiencies in the prior art becomes the subject to be studied and solved by the present invention. Contents of the invention [0004] The object of the present invention is to provide a digital front-end system and a suppress...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2691
Inventor 林雄鑫朱忠益
Owner 南通市门海微电子有限公司
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