CN202310115U

CN202310115U - Repeater

Info

Publication number: CN202310115U
Application number: CN2011203838525U
Authority: CN
Inventors: 王冰峰; 王晓帆
Original assignee: Comba Telecom Systems China Ltd
Current assignee: Comba Network Systems Co Ltd
Priority date: 2011-10-11
Filing date: 2011-10-11
Publication date: 2012-07-04
Anticipated expiration: 2021-10-11

Abstract

The present utility model provides a repeater. The repeater comprises a down link, and the down link is composed of a low-noise amplifier, a PA amplifier, a first power detector, an isolation detection unit for realizing isolation detection of the repeater, and a controller for realizing power control of the repeater according to isolation. By adopting the repeater, automatic station opening can be realized, station opening efficiency can be enhanced, and station opening costs can be saved.

Description

A kind of repeater

Technical field

The utility model relates to mobile communication and covers the field, is specifically related to a kind of repeater.

Background technology

The repeater is when setting up, and the problem that often runs into is whether the power of opening can satisfy the covering requirement; Whether the input port of radiofrequency signal and the isolation of delivery outlet can satisfy the requirement of no-self excitation; Whether the standing wave value of input/output port can satisfy network requirement etc.Based on traditional repeater, common way is to use frequency spectrograph to test the performance number of repeater radio frequency input and output mouth when opening, and isolation etc. are provided with the gain of repeater according to these parameters, and adjustment donor antenna and the position that receives main antenna etc.; The maximum problem of this way is out that the station consumed time is long, and it is many to take human resources, and employed instrument many (for example: frequency spectrograph, portable computer, various cables and cable joint) has brought great inconvenience for the staff who sets up the repeater.

The utility model content

The utility model provides a kind of repeater, can realize the open-minded automatically of repeater, improve and open station efficient, practice thrift and open the station cost.

A kind of repeater comprises: down link; Said down link comprises: low noise amplifier, PA amplifier and first power detector; Wherein, said down link also comprises:

Carry out the isolation detecting unit that isolation detects;

Carry out the controller of repeater power control according to said isolation;

One end of said first power detector is connected with the output of said PA amplifier, and the other end connects an end of said controller; The other end of said controller is connected the control end of said low noise amplifier; Said isolation detecting unit comprises signal generator, narrow band filter and second power detector; The output of said signal generator is coupling in the input of said PA signal amplifier; One end of said narrow band filter is coupling in the output of said low noise amplifier, and the other end is connected with said second power detector; Said isolation detection unit is connected with said controller.

The isolation of repeater through the isolation detecting unit is set, is detected in the repeater that the utility model proposes through controller control isolation detecting unit in the repeater; The gain that isolation that obtains according to detection and isolation surplus are provided with the repeater; Detect signal power value in the working band of repeater through power detector; Again according to the rated output power of signal power value, repeater in the working band of repeater; Power control is carried out in the repeater, can realize opening automatically the station thus, need not arrange special staff to carry numerous instruments and go to the commissioning repeater; Improved and opened station efficient, practiced thrift and opened the station cost.

Description of drawings

Fig. 1 is structural representation in repeater of the utility model;

Fig. 2 is another structural representation of repeater of the utility model.

Embodiment

For ease of understanding the utility model, will combine accompanying drawing to set forth below.

Please refer to Fig. 1, the repeater that the present invention proposes comprises: up link T5, two-way MT interface T4, down link T6 and two-way DT interface T7; Wherein, Two-way MT interface T4 connects the output of down link T6 and the input of up link T5; Two-way DT interface T7 connects the input of down link T6 and the output of up link T5, and down link T6 comprises: the LNA T61, the first frequency mixer T62, broadband filter T63, the second frequency mixer T64, PA amplifier T65 and the first power detector T66 that connect successively; Two-way MT interface T4 connects donor antenna, and two-way DT interface T7 connection receives main antenna; Wherein, down link T6 also comprises:

Isolation detecting unit T8 and controller T67; Wherein, the end of the first power detector T66 is connected with the output of PA amplifier T65, and the other end of the first power detector T66 connects the end of controller T67; The other end of controller T67 is connected the control end of low noise amplifier T61;

Isolation detecting unit T8 comprises signal generator T81, narrow band filter T82 and the second power detector T83; The output of signal generator T81 is coupling in the input of PA signal amplifier T65; The end of narrow band filter T82 is coupling in the output (output of low noise amplifier T61) of the first frequency mixer T62, and the narrow band filter T82 other end is connected with the second power detector T83; Isolation detection unit T8 is connected with controller T67;

Controller T67 control isolation detecting unit T8 detects the isolation of repeater, the power output that the control first power detector T66 detects signal in the working band of repeater; And, carry out repeater power control according to the power output and the repeater rated power of signal in isolation, isolation surplus, the repeater working band.

The utility model detects the isolation of repeater through the isolation detecting unit is set through controller control isolation detecting unit in the repeater; The gain that isolation that obtains according to detection and isolation surplus are provided with the repeater; Detect signal power value in the repeater working band under the gain situation of preset repeater through power detector; Again according to the rated output power of signal power value, repeater in the working band of repeater; Power control is carried out in the repeater, can realize opening automatically the station thus, need not arrange special staff to carry numerous instruments and go to the commissioning repeater; Improved and opened station efficient, practiced thrift and opened the station cost.

Wherein, controller T67 control isolation detecting unit T8 detects the isolation of repeater, the power output that the control first power detector T66 detects repeater work inband signaling; And according to the power output and the repeater rated power of isolation, isolation surplus, repeater work inband signaling, the process of carrying out repeater power control comprises:

Controller T67 gating isolation detecting unit T8; Signal generator T81 produces first reference signal; Wherein, first reference signal is the fixed frequency of the outer certain limit of repeater working band and the signal of constant power; Guarantee isolation degree test not with in the influence of frequency, simultaneously again must be as far as possible with working band near, guarantee the signal unrestraint of duplexer (two-way MT interface T4 and two-way DT interface T7) to this frequency;

PA amplifier T65 (power amplifier) first reference signal that is coupled is sent the signal and first reference signal in the working band of repeater through the donor antenna that is connected with two-way MT interface T4; Connect the signal that receives the emission of main antenna reception donor antenna that T7 is connected with two-way DT mouth;

The signal that low noise amplifier T61 will be received by main antenna carries out low noise and amplifies; Narrow band filter T82 coupling is carried out intermediate frequency filtering and is obtained second reference signal through the signal of low noise amplifier T61; The second power detector T83 obtains the performance number of second reference signal, and sends into controller T67; Controller T67 is provided with the gain of low noise amplifier T61 according to the performance number of first reference signal, the performance number and the isolation surplus of second reference signal;

Controller T67 closes isolation detecting unit T8, the power output of first power detector T66 statistics repeater work inband signaling; The power output of the repeater work inband signaling of this moment statistics is to detect isolation, and is provided with and detects after the gain of low noise amplifier;

Whether the output power value that controller T67 judges repeater work inband signaling is greater than the rated output power of repeater; If; Then reduce the gain of LNA, notify the first power detector T66 to continue the power output of statistics repeater work inband signaling by preset gain step value; If not, then the station is opened in completion.

In order to embody the station situation of opening of repeater intuitively, can make corresponding alarm according to opening the station situation; In order to guarantee the operate as normal of repeater, that the minimum that a system gain is set is concrete simultaneously, please refer to Fig. 2:

Also comprise the alarm device T9 that is connected with controller T67 at down link T6;

The power output of repeater work inband signaling is still greater than the rated output power of repeater in limited time if controller T67 is reduced to gain-adjusted following with the gain of low noise amplifier T61, and alarm device T9 then sends out the indication of station failure;

Open the station if accomplish, alarm device T9 sends out the successful indication in station.Can be used as alarm device with the LED lamp that can show different colours

In order to obtain isolation more accurately, can do following the improvement to testing process:

The power of the second power detector T83 repeated detection, second reference signal obtains the mean value of power of second reference signal of repeated detection, and sends into controller T67;

Controller T67 is provided with the gain of low noise amplifier T61 according to the mean value of the power of second reference signal, the performance number and the isolation surplus of second reference signal.

Wherein, controller T67 is according to the performance number of first reference signal, the performance number of second reference signal and preset gain, and the process that the gain of low noise amplifier T61 is set is specially:

Controller T67 deducts the performance number of second reference signal with the performance number of first reference signal, obtains isolation; The gain of low noise amplifier T61 is set according to isolation and isolation surplus then, makes the gain of down link deduct the difference of preset gain less than isolation.Usually preset yield value is 15dB, so the gain of low noise amplifier T61 need satisfy condition when being provided with: the difference that deducts 15dB less than isolation.If isolation meets the demands, can maximum be transferred in the gain of low noise amplifier T61, at this moment, the power maximum (rated output power) of repeater output.

But, when the transmitting power of actual disposition repeater, can not dispose, in order to avoid phenomenon occurs starting to control with the rated power of repeater; Therefore, need on the basis of rated power, deduct the reserved value of engineering experience again:

At the power of judging the repeater working signal whether in the step greater than the rated output power of repeater; If the power of repeater working signal equals the rated output power of repeater; After then being the gain of repeater with current system gain; Reduce the power of repeater working signal again by preset engineering experience signal value, accomplish and open the station.

Concrete, the rated power of repeater is 40dBm, needs to reserve certain system power desire degree, this power desire degree is 5dBm in gsm system, so the down output power of repeater is adjusted to 35dBm.

Because the influence of wireless environment, dynamic variation can take place in the isolation of repeater; Therefore, also will be a dynamic process to the detection of isolation, for reaching this purpose; Can open the station system to the repeater and do further to improve, please refer to Fig. 2: timer T84 is set in isolation detecting unit T8; Be connected with the second power detector T83, be used for being provided with in advance detection time at interval;

The second power detector T83 detects the operation of the power of second reference signal by the time interval.

Above the utility model execution mode does not constitute the qualification to the utility model protection range.The modification of being done within any spirit and principle at the utility model, be equal to replacement and improvement etc., all should be included within the claim protection range of the utility model.

Claims

1. a repeater comprises: down link; Said down link comprises: low noise amplifier, PA amplifier and first power detector; It is characterized in that said down link also comprises:

Carry out the isolation detecting unit that the repeater isolation detects;

Carry out the controller of repeater power control according to said isolation;

2. repeater according to claim 1 is characterized in that, said down link also comprises: opening the alarm device of standing successfully or sending alarm prompt when opening station failure; Said alarm device is connected with said controller.

3. repeater according to claim 2 is characterized in that, said alarm device is the LED lamp.

4. according to each described repeater of claim 1 to 3, it is characterized in that said down link also comprises the timer that said second power detector interval detection time is set in advance; Said timer is connected with said second power detector.