td‑lte downlink signal jammer

Abstract

The invention relates to a TD-LTE downlink signal jammer, comprising a TD-LTE baseband synchronizing device, a DDS signal generator, a switch control unit and a TD-LTE power amplifier; a TD-LTE baseband synchronizing device for receiving time slot signals and The gap signal is sent to the switch control unit, and at the same time, the frequency point data acquisition signal from the DDS signal generator is received to send the carrier frequency point data to the DDS signal generator; the DDS signal generator is used to obtain the output signal according to the carrier frequency point data processing, And send the output signal to the switch control unit; the switch control unit is used to realize switching according to the high and low levels of the time slot signal, so that when the time slot signal is high level, the output signal is transmitted to the TD-LTE power amplifier; The TD‑LTE power amplifier is used to amplify the output signal power from the switch control unit for output. The present invention acquires the carrier signal according to the current network information, automatically and accurately shields the same channel as the system carrier, and only interferes with the downlink without affecting the normal communication of the base station.

Description

technical field [0001] The invention relates to the technical field of jammers, in particular to a TD-LTE downlink signal jammer. Background technique [0002] At present, the TD-LTE signal jammers on the market are all VCO (voltage controlled oscillator) technology scanning broadband without synchronous interference. The disadvantage is that the frequency offset of VCO scanning technology is difficult to control. In order to ensure the shielding effect, the bandwidth is generally increased at the expense of power to ensure coverage. Identify the TD-LTE network carrier channel and synchronization signal function. Although this can shield the mobile phone signal, it will also affect the uplink of the base station. The broadband inaccurate transmission does not work well under the same radio frequency power, and at the same time affects the sensitivity of the base station receiver. The decrease of signal-to-noise ratio will directly affect the coverage radius of mobile communi...

AI Technical Summary

Problems solved by technology

[0002] At present, the TD-LTE signal jammers on the market are all VCO (voltage controlled oscillator) technology scanning broadband without synchronous interference. The disadvantage is that the frequency offset of VCO scanning technology is difficult to control. In order to ensure the shielding effect, the bandwidth is generally increased at the expense of power to ensure coverage. Identify the TD-LTE network carrier channel and synchronization signal function. Although this can shield the mobile phone signal, it will also affect the uplink of the base station. The broadband inaccurate transmission does not work well under the same radio frequency power, and at the same time affects the sensitivity of the base station receiver. The decrease of signal-to-noise ratio index directly affects the coverage radius of mobile communication base stations and brings losses to operators and mobile phone users

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