TD-LTE (time division long term evolution) downlink signal jammer

Abstract

The invention relates to a TD-LTE (time division long term evolution) downlink signal jammer which comprises a TD-LTE baseband synchronization device, a DDS (direct digital synthesizer) signal generator, a switch control unit and a TD-LTE power amplifier. The TD-LTE baseband synchronization device is used for receiving time slot signals and transmitting the time slot signals to the switch control unit and receiving frequency-point data acquisition signals transmitted by the DDS signal generator to transmit carrier frequency point data to the DDS signal generator; the DDS signal generate is used for processing acquired output signals according to the carrier frequency point data and transmitting the output signals to the switch control unit; the switch control unit is used for realizing turning on and off according to high and low electrical level of the time slot signals so as to transmit the output signals to the TD-LTE power amplifier when the time slot signals are at the high electrical level; the TD-LTE power amplifier is used for amplifying the output signals from the switch control unit prior to outputting the output signals. The carrier signals are acquired according to current network information, channels identical to system carrier are automatically accurately shielded, and downlink is jammed without affection on normal base station communication.

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

Images