CN210609198U

CN210609198U - TD-LTE digital interference unit

Info

Publication number: CN210609198U
Application number: CN201921589923.XU
Authority: CN
Inventors: 任恩贤; 宋胜东
Original assignee: Shenzhen Jiaxian Communication Equipment Co ltd
Current assignee: Shenzhen Jiaxian Communication Technology Co ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-05-22
Anticipated expiration: 2029-09-23

Abstract

The utility model discloses a TD-LTE digital interference ware, include: the device comprises a radio frequency receiving module, an ADC (analog-to-digital converter) module, a filtering module, a PSS (power system stabilizer) synchronization module, a digital noise module, a DAC (digital-to-analog converter) module and a radio frequency transmitting module which are connected in sequence; the PSS synchronization module determines a time slot switching point of TD-LTE, and the digital noise module acquires the time slot switching point and generates digital noise. The method and the device have the advantage of high interference efficiency, and are favorable for better completing the task of signal shielding.

Description

TD-LTE digital interference unit

Technical Field

The utility model relates to the field of communication technology, especially, relate to a TD-LTE digital interference ware.

Background

The mobile phone terminal is an indispensable tool in life of people, brings a lot of convenience to life of people, but also causes some non-negligible problems. For example, 1, the method becomes a new divulgence channel and threatens the security of confidential information. 2. Becoming a new noise pollution source and interfering with the normal work order. 3. Becomes a new unsafe factor and brings hidden troubles to the safety production of enterprises. 4. Becomes a new criminal means and brings influence to the social stability. An effective signal shielding device is needed to manage a small range area.

The working principle of the analog signal shielding device is that the full-bandwidth frequency sweeping is carried out by using the frequency modulation signals for transmitting the analog signals, and the transmitted power is required to be larger than the power covered by the public network base station, so that the normal data transmitted from the public network base station cannot be detected by the mobile phone, and the signal shielding effect is achieved. The technical scheme has the defects of huge equipment volume, high power consumption, large radiation, small effective shielding range, severe interference on public network base stations and influence on public network communication.

The general digital signal shielding device in the market at present adopts a digital signal as an interference source to carry out fixed-point interference aiming at an effective frequency point. The scheme has the defects that when a TDD-LTE signal is shielded, TDD time slot synchronization can not be considered while downlink time slot uninterrupted interference is achieved, and the full downlink time slot interference can cause overlarge power consumption and influence on the service life of equipment.

SUMMERY OF THE UTILITY MODEL

The utility model provides a TD-LTE digital interference ware aims at solving above-mentioned problem.

According to the embodiment of the application, the TD-LTE digital interference unit comprises: the device comprises a radio frequency receiving module, an ADC (analog-to-digital converter) module, a filtering module, a PSS (power system stabilizer) synchronization module, a digital noise module, a DAC (digital-to-analog converter) module and a radio frequency transmitting module which are connected in sequence; the PSS synchronization module determines a time slot switching point of TD-LTE, and the digital noise module acquires the time slot switching point and generates digital noise.

The utility model discloses an among the TD-LTE digital interference ware, the filtering module is narrowband filtering module.

The utility model discloses an among the TD-LTE digital interference ware, the digital noise that digital noise module generated is narrowband digital noise.

The technical scheme provided by the embodiment of the application can have the following beneficial effects: the TD-LTE digital interference unit has the advantage of high interference efficiency, and is favorable for better completing the task of signal shielding.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 shows the time-frequency code domain occupied by the TDD-LTE downlink physical channel.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

As shown in fig. 1, the utility model discloses a TD-LTE digital interference ware, include: the device comprises a radio frequency receiving module, an ADC (analog-to-digital converter) module, a filtering module, a PSS (power system stabilizer) synchronization module, a digital noise module, a DAC (digital-to-analog converter) module and a radio frequency transmitting module which are connected in sequence; the PSS synchronization module determines a time slot switching point of TD-LTE, and the digital noise module acquires the time slot switching point and generates digital noise.

Specifically, firstly, a synchronous antenna collects TD-LTE signals in the air, the TD-LTE signals are sent to an ADC (analog-to-digital converter) module through a radio frequency receiving module to be subjected to analog-to-digital conversion, then PSS (Power System stabilizer) information is filtered out through a filtering module, power normalization processing is carried out in a time domain, PSS code sliding correlation is carried out through 128 sampling points, a time slot switching point of the TD-LTE is determined, digital random noise is generated at a designated position after the time slot information is obtained through a digital-to-analog conversion and radio frequency transmission part, and finally the TD-LTE signals are transmitted through a transmitting antenna. According to the scheme, after the time slot information is acquired by using the power normalization PSS synchronization algorithm, digital random noise is generated in a specific time slot, the digital noise coverage time domain is short, the interference efficiency is improved, and the set power is reduced.

Referring to fig. 2, fig. 2 shows TDD-LTE downlink physical channels, functions of physical signals, and positions of occupied time-frequency code domains, specifically including slot0 (slot 0), slot1 (slot 1), DwPTS (downlink special slot), GP (guard slot), and UpPTS (uplink special slot) of a 5 ms half frame, where PBCH (physical broadcast channel) occupies the first 4 symbols of slot1, including signal bandwidth and frame number, and the like, PSS represents a primary synchronization signal, occupies the 3 rd symbol of DwPTS, SSS represents a secondary synchronization signal, and occupies the last symbol of slot 1. According to the scheme, digital random noise is used as an interference source, the time domain coverage is from PBCH to PSS, and the retention time is 714 microseconds; the width of the middle 6rb (resource block), specifically 1.08Mhz, is covered in the frequency domain. The use of the interference source has the advantages that only 714 microseconds of transmission can be needed in 5-millisecond TDD-LTE half-frame time, and the occupied time is less than 15%; the bandwidth of the standard 20Mhz TDD-LTE only accounts for 6 percent, so that the interference efficiency is greatly improved.

In an alternative embodiment, the filtering module is narrowband filtering. The noise outside the band can be filtered out, and the signal sensitivity is improved. In some embodiments, the digital noise generated by the digital noise module is narrowband digital noise. The narrow-band noise has the advantages of power concentration and high transmitting power in a short time.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A TD-LTE digital jammer, comprising: the device comprises a radio frequency receiving module, an ADC (analog-to-digital converter) module, a filtering module, a PSS (power system stabilizer) synchronization module, a digital noise module, a DAC (digital-to-analog converter) module and a radio frequency transmitting module which are connected in sequence; the PSS synchronization module determines a time slot switching point of TD-LTE, and the digital noise module acquires the time slot switching point and generates digital noise.

2. The TD-LTE digital jammer of claim 1, wherein the filtering module is a narrowband filtering module.

3. The TD-LTE digital jammer of claim 2, wherein the digital noise generated by the digital noise module is a narrow-band digital noise.