CN202353565U

CN202353565U - Real-time channel testing equipment

Info

Publication number: CN202353565U
Application number: CN2011204821150U
Authority: CN
Inventors: 李红雨
Original assignee: CETC 54 Research Institute
Current assignee: CETC 54 Research Institute
Priority date: 2011-11-28
Filing date: 2011-11-28
Publication date: 2012-07-25
Anticipated expiration: 2021-11-28

Abstract

The utility model discloses real-time channel testing equipment, which relates to real-time testing equipment for working states of channels and communication equipment in the Es-layer communication field. The real-time channel testing equipment comprises a log-periodic antenna unit, a receiver unit, an analog-to-digital conversion unit, a broadband signal detection module, a single frequency receiving level signal detection module, a monitoring interface unit and a power supply; and the real-time channel testing equipment can realize detection and receiving on a single frequency feature testing signal, a multipath delay feature testing signal and a related frequency feature testing signal. The real-time channel testing equipment is of a real-time testing instrument of an Es-layer channel, provides convenience for researching communication equipment based on an Es-layer channel, and proves that the device has a better practical effect through practical application.

Description

A kind of Real-time Channel testing equipment

Technical field

The utility model relates to the real-time test device of Es layer communication in the communications field; For developing, use Wireless Telecom Equipment that the real-time visual pattern analysis and the show tools of a kind of channel status and equipment working state are provided, be specially adapted to wireless communication system based on the VHF beyond-the-horizon communication characteristic of channel research of Es layer channel.

Background technology

The Es layer is the instantaneous accidental high electron density layer of E-LAYER regional area, Es layer channel longer duration, and strong Es layer can significantly strengthen the VHF radio transmissioning signal when happening suddenly, and significantly promotes the communication system transmits performance.China is the unusual district occurred frequently of global Es layer, for the Es layer channel resource of better utilization China, need study Es layer channel statistical distribution character, and the statistical law of grasping the main channel parameter of Es layer that influences Communication System Design is significant.Current do not have special tester to test Es layer channel.The utility model provide special design to Es layer Complex Channel characteristic satisfy comprehensive spreadability of main channel parameter and the Es layer communication channel tester that high precision requires, be supported in and carry out channel test under the various representative link conditions in low latitude area in China and test.

The utility model content

The purpose of the utility model is to avoid the weak point in the above-mentioned background technology and a kind of Real-time Channel testing equipment with test, analysis, record channel and communication device works state is provided.The utility model can be tested from level nature, multidiameter delay characteristic, three aspects of frequencfy-dependent behavior the Es layer characteristic of channel.Not only frequency spectrum shows in real time to received signal; And these key parameters that influence system are carried out record; Can through the mode of playback afterwards analyze channel with the characteristic of communication distance and height change with the operating state of communication equipment each part in the characteristic of channel process of these variations, for the adaptability of equipment to communication channel is provided in the equipment R&D process.

The purpose of the utility model is achieved in that a kind of real-time Es layer channel test equipment; Comprise 10MHz module 2, the first analog/digital converter module 3, the second analog/digital converter module 4, Broadband Detection module 5, single-frequency incoming level signal detection module 6, lock phase die change piece 7, monitor-interface module 8, it is characterized in that: also comprise receiver module 1; Wherein the input port 1 of receiver module 1 connects the output port of antenna; The input/output port 2 of receiver module 1 connects the output port 1 of monitor-interface module 8; The input port 3 of receiver module 1 connects the output port 2 of Broadband Detection module 5; The output port 4 of receiver module 1 connects the input port 1 of the second analog/digital converter module 4; The input port 5 of receiver module 1 connects the output port 2 of Broadband Detection module 5, and the output port 6 of receiver module 1 connects the input port 1 of the first analog/digital converter module 3; The output port 1 of 10MHz module 2 connects the input port 3 of receiver module 1; The output port 2 of 10MHz module 2 connects the input port 1 of phase-locked loop module 7; The output port 2 of the first analog/digital converter module 3 connects the input port 1 of Broadband Detection module 5; The output port 2 of the second analog/digital converter module 4 connects the input port 1 of single-frequency incoming level signal detection module 6; The input/output interface 3 of Broadband Detection module 5 connects the input/output port 2 of monitor-interface module 8; The input/output interface 2 of single-frequency incoming level signal detection module 6 connects the input/output port 3 of monitor-interface module 8;

Antenna 9 with the channel test signal of receiving be sent to that receiver module 1 is amplified, output 10.7MHz intermediate-freuqncy signal branch is clipped to the first analog/

digital converter module

3 and 4 pairs of signals of the second analog/digital converter module carry out analog-to-digital conversion after the filtering, frequency-conversion processing; Send into Broadband Detection module 5 or single-frequency incoming level signal detection module 6 afterwards more respectively and accomplish the detection of intermediate-freuqncy signal, and the channel test data are pressed form through monitor-interface module 8.

Wherein, described receiver module 1 comprises variable attenuator 11, narrow band filter 12, input matching module 13, wave detector 14, filter 15 and emitter follower 16; The signal of input port 1 external antenna 9 outputs of variable attenuator (11), the port 2 of variable attenuator (11) connects the input port 1 of narrow band filter 12; The output port of 10MHz module 2 connects the input port of narrow band filter 12, and the output port 2 of narrow band filter 12 connects the input port 1 of input coupling 13; The output port 2 of input coupling 13 connects the input port 1 of wave detector 14; The output port 2 of wave detector 14 connects the input port 1 of filter 15; The output port 2 of filter 15 connects the input port 1 of emitter follower 16; The output port 2 of emitter follower 16 connects the input port 1 of the first analog/digital converter module 3, and the output port 4 of emitter follower 16 connects the input port 1 of the second analog/digital converter module 4; Each input port 9 pin and power supply 10 outputs+V voltage end also connect;

Pass through variable attenuator 11 from the radiofrequency signal that antenna receives; Carry out filtering through narrow band filter 12 then; Get into input coupling 13 then and get into filter 15 again through wave detector 14 again, export first to second mould/number conversion module through emitter follower 16 at last.

The utility model is compared background technology has following advantage:

1. the utility model has realized discontinuous channels such as Es layer are carried out the function of channel performance test; And be packaged into these monitoring parameters the monitor data frame of anchor-frame structure length; Can output to the monitoring display end through a straight through cable; This implementation structure has reduced the tester quantity of communication channel and equipment working state greatly, has promoted Es layer communication equipment towards lightweight and miniaturization development.

2. image frequency is away from receive frequency behind the utility model double conversion, and the signal to noise ratio of output Low Medium Frequency signal is higher, when low level, (130dBm) detects easily.

3. at lower frequency, the narrow band filter ratio is easier to realize.

4. each parts of the utility model adopt extensive programmable integrated circuit to make, and have advantages such as circuit is simple, volume is little, with low cost, stable and reliable for performance, and are practical in engineering.

Description of drawings

Fig. 1 is that the electric principle of the utility model embodiment is divided block diagram;

Fig. 2 is the electrical schematic diagram of the utility model receiver module 4 embodiment;

Embodiment

With reference to Fig. 1, the utility model is made up of parts such as receiver 1,10MHz module 2, A/D converter 3, A/D converter 4, Broadband Detection module 5, single-frequency incoming level signal detection module 6, phase-locked loop 7, monitor-interface module 8, antenna 9, power modules 10.Fig. 1 is the electric functional-block diagram of the utility model, and embodiment presses Fig. 1 connection line, wherein the effect of receiver unit be with the radiofrequency signal that receives from antenna to signal amplify, filtering, frequency conversion, output 10.7MHz intermediate-freuqncy signal; The 10MHz module is in order to provide 10MHz high steady clock signal; The effect of A/D converter is that signal is carried out analog-to-digital conversion; Broadband Detection module 5 is responsible for broadband signal is detected; Single-frequency incoming level input then module 6 is responsible for simple signal is detected; Phase-locked loop is responsible for frequency deviation is adjusted; Power module is transformed to the multi-channel DC electricity with the AC220V alternating current and is dissemination channel characteristic integration test unit and transceiver unit power supply.

The utility model power supply 10 provides parts operating voltages at different levels, and embodiment adopts general integrated regulated power supply to make, and output+V voltage is+5V voltage.

The receiver unit effect of the utility model be with the radiofrequency signal that receives from antenna through low noise amplifier, low-converter and put AGC etc. to signal amplify, filtering, frequency conversion, output 10.7MHz intermediate-freuqncy signal.It is by variable attenuator 11, narrow band filter 12, input coupling 13, wave detector 14, filter 15, emitter follower 16; Fig. 2 is the electrical schematic diagram of the utility model battle array receiver unit 2 embodiment, and by its connection line; Wherein low noise amplifier module amplifies signal, and low-converter carries out filtering to signal, in put AGC signal carried out frequency conversion;

The operation principle of the utility model is that reception antenna is sent to the preselection filter filtering in the receiver with the channel test signal of receiving; Again through low noise amplifier, low-converter and in put AGC etc. to signal amplify, filtering, frequency conversion, output 10.7MHz intermediate-freuqncy signal.Reception signal processing module in the dissemination channel characteristic integration test unit receipts passage is accomplished the detection of intermediate-freuqncy signal, and the channel test data is sent to the PC computer by form through the monitor-interface module according to different test patterns.

Claims

1. Real-time Channel testing equipment; Comprise 10MHz module (2), the first analog/digital converter module (3), the second analog/digital converter module (4), Broadband Detection module (5), single-frequency incoming level signal detection module (6), lock phase die change piece (7), monitor-interface module (8), it is characterized in that: also comprise receiver module (1); Wherein the input port 1 of receiver module (1) connects the output port of antenna; The input/output port 2 of receiver module (1) connects the output port 1 of monitor-interface module (8); The input port 3 of receiver module (1) connects the output port 2 of Broadband Detection module (5); The output port 4 of receiver module (1) connects the input port 1 of the second analog/digital converter module (4); The input port 5 of receiver module (1) connects the output port 2 of Broadband Detection module (5), and the output port 6 of receiver module (1) connects the input port 1 of the first analog/digital converter module (3); The output port 1 of 10MHz module (2) connects the input port 3 of receiver module (1); The output port 2 of 10MHz module (2) connects the input port 1 of phase-locked loop module (7); The output port 2 of the first analog/digital converter module (3) connects the input port 1 of Broadband Detection module (5); The output port 2 of the second analog/digital converter module (4) connects the input port 1 of single-frequency incoming level signal detection module (6); The input/output interface 3 of Broadband Detection module (5) connects the input/output port 2 of monitor-interface module (8); The input/output interface 2 of single-frequency incoming level signal detection module (6) connects the input/output port 3 of monitor-interface module (8);

Antenna (9) with the channel test signal of receiving be sent to that receiver module (1) is amplified, output 10.7MHz intermediate-freuqncy signal branch is clipped to the first analog/digital converter module (3) and the second analog/digital converter module (4) is carried out analog-to-digital conversion to signal after the filtering, frequency-conversion processing; Send into Broadband Detection module (5) or single-frequency incoming level signal detection module (6) afterwards more respectively and accomplish the detection of intermediate-freuqncy signal, and the channel test data are pressed form through monitor-interface module (8).

2. a kind of Real-time Channel testing equipment according to claim 1 is characterized in that: described receiver module (1) comprises variable attenuator (11), narrow band filter (12), input matching module (13), wave detector (14), filter (15) and emitter follower (16); The signal of input port 1 external antenna (9) output of variable attenuator (11), the port 2 of variable attenuator (11) connects the input port 1 of narrow band filter (12); The output port of 10MHz module (2) connects the input port of narrow band filter (12), and the output port 2 of narrow band filter (12) connects the input port 1 of input coupling (13); The output port 2 of input coupling (13) connects the input port 1 of wave detector (14); The output port 2 of wave detector (14) connects the input port 1 of filter (15); The output port 2 of filter (15) connects the input port 1 of emitter follower (16); The output port 2 of emitter follower (16) connects the input port 1 of the first analog/digital converter module (3), and the output port 4 of emitter follower (16) connects the input port 1 of the second analog/digital converter module (4); Each input port 9 pin and power supply 10 outputs+V voltage end also connect;

Pass through variable attenuator (11) from the radiofrequency signal that antenna receives; Pass through narrow band filter (12) then and carry out filtering; Entering input coupling (13) is passed through wave detector (14) again and is got into filter (15) more then, exports first to second mould/number conversion module through emitter follower (16) at last.