Multiple-channel radio-frequency signal adaptation system

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...

AI Technical Summary

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

Images