Multiple-channel radio-frequency signal adaptation system

A radio frequency signal and adaptation system technology, applied in transmission systems, baseband system components, shaping networks in transmitters/receivers, etc., can solve the problem that signal quality cannot be well guaranteed, channel signal quality interference, deterioration Signal quality and other issues, to achieve great practicability and operability, avoid adjacent frequency interference and noise interference, and achieve good phase noise indicators

Active Publication Date: 2012-01-11
ANYWAVE COMM TECH
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Problems solved by technology

However, this technology has the following problems: 1. Using one or more frequency conversion methods, the structure is complex and the phase noise is poor, which will deteriorate the signal quality; 2. Use a low-pass filter with a passband range of 0-160MHz to filter out frequency points For broadband signals with a variable center and a bandwidth of 40MHz, the signal quality after filtering cannot be well guaranteed, especially when the frequency of the RF broadband signal is discontinuous, the signal quality of the working channel will be seriously interfered by adjacent channel noise

Method used

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  • Multiple-channel radio-frequency signal adaptation system
  • Multiple-channel radio-frequency signal adaptation system
  • Multiple-channel radio-frequency signal adaptation system

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Embodiment

[0020] like figure 1 As shown, this embodiment includes: an automatic gain control module, a direct frequency conversion module, a digital-to-analog conversion module, a clock control module and a digital signal processor, wherein: the automatic gain control module receives a radio frequency signal and performs input signal gain stabilization control to output a constant Gained RF signal is sent to the direct conversion module for down-conversion, and the direct conversion module outputs the baseband analog signal to the digital-to-analog conversion module for analog-to-digital conversion, and then outputs the baseband digital signal to the digital signal processor, which independently delays each channel After signal optimization and processing, the optimized digital signal is output to the digital-to-analog conversion module for digital-to-analog conversion. The digital-to-analog conversion module outputs the optimized analog signal to the direct conversion module for up-conv...

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Abstract

The invention discloses a multiple-channel radio-frequency signal adaptation system in the technical field of digital signal processing, and the system comprises an automatic gain control module, a direct frequency conversion module, a digital-analog conversion module, a clock control module and a digital signal processor, wherein the digital signal processor is composed of a branching unit, N paiallel and independent control signal processing branches and a combiner. The system provided by the invention has the advantages of simple structure, and good phase noise index; and the precision of the radio-frequency delay is set to 0.025 microseconds, the range of the radio-frequency delay is set to second level, multiple channels can work independently, and any channel can be set to independently open and close.

Description

technical field [0001] The invention relates to a device in the technical field of digital signal processing, in particular to a multi-channel radio frequency signal adaptation system. Background technique [0002] In the wireless coverage system, in order to increase the coverage and improve the coverage effect, it is sometimes necessary to delay the radio frequency signal at the transmission point to meet the overall system requirements. This often occurs in the single frequency network networking mode. The so-called single frequency network is to use multiple transmission points in a certain geographical area (city, province, or even a country) to transmit the same wireless signal at the same time through a frequency band, so as to achieve reliable transmission of the geographical area. cover. Since the signals arriving at different transmission points pass through different distribution networks, in order to ensure that each transmission point transmits the same progra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H04L25/03
Inventor 李红军戴凯灿王先勇范莹莹张永亮
Owner ANYWAVE COMM TECH
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