CN102932071A - Offline isolation detection method for digital repeater - Google Patents
Offline isolation detection method for digital repeater Download PDFInfo
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- CN102932071A CN102932071A CN2011102277049A CN201110227704A CN102932071A CN 102932071 A CN102932071 A CN 102932071A CN 2011102277049 A CN2011102277049 A CN 2011102277049A CN 201110227704 A CN201110227704 A CN 201110227704A CN 102932071 A CN102932071 A CN 102932071A
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- 238000002955 isolation Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 title abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims abstract description 39
- 238000005070 sampling Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 230000003321 amplification Effects 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
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- 238000012544 monitoring process Methods 0.000 abstract 2
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- 238000011084 recovery Methods 0.000 description 2
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Abstract
The invention discloses an offline isolation detection method for a digital repeater. The method comprises the following steps of: (1) setting the transmission intensity and transmission frequency point of a received signal; (2) performing down-conversion on the received signal received by a receiver to obtain a down-converted signal, and performing first down-conversion sampling on the down-converted signal to obtain a first sampled signal; (3) performing second down-conversion sampling on the first sampled signal to obtain a second sampled signal; (4) filtering an interference signal from the second sampled signal to obtain a transmitted signal (5) performing power statistics on the transmitted signal; (6) reporting the obtained power to a monitoring system; and (7) calculating system isolation according to a difference between the intensity of the transmitted signal and the intensity of the received signal by using the monitoring system. According to the method, the addition of a module to repeater equipment is avoided, so that the additional increase of cost of the equipment is avoided.
Description
Technical field
The present invention relates to wireless communication technology, relate in particular to the method that a kind of digital high-frequency amplification station off-line isolation detects.
Background technology
The isolation of wireless discharging-directly station dual-mode antenna is an important test parameter when project installation, and dual-mode antenna must satisfy certain requirement just can leave the station, otherwise equipment affects the covering of base station with regard to the possibility abnormal work.
Traditional isolation detection scheme is to increase a radio-frequency module in equipment, and the receiving and transmitting signal process computation by radio-frequency module goes out isolation between antennae.This scheme will increase a module in repeater equipment, volume, weight have increased again the cost of equipment when increasing.
Summary of the invention
The shortcoming that the object of the invention is to overcome prior art provides a kind of method of digital high-frequency amplification station off-line isolation detection with not enough, and the method does not need to increase module in repeater equipment, thereby need not additionally to increase the cost of equipment.
Purpose of the present invention is achieved through the following technical solutions: the method that this digital repeater off-line isolation detects may further comprise the steps:
(1) emissive porwer and the emission frequency that receives signal is set;
(2) the reception signal that receiving terminal is received carries out down-conversion, obtains down-conversion signal, and down-conversion signal is done for the first time down-conversion sampling, obtains for the first time sampled signal;
(3) then to the first time sampled signal carry out down-conversion sampling second time, obtain the sampled signal second time;
(4) interference signal during filtering is sampled is for the second time transmitted;
(5) carry out power statistic to transmitting;
(6) power that counts on is reported to supervisory control system;
(7) supervisory control system calculates the isolation of system by the intensity that transmits and the difference that receives the intensity of signal.
Preferably, the down-conversion first time in the described step (2) is sampled as 6 times of down-conversion samplings; The down-conversion second time in the described step (3) is sampled as 8 times of down-conversion samplings.
Preferably, the isolation ISO of described step (7) computing system, formula is:
ISO＝P
out+(G-G3)-P
in
P
OutBe the some frequency power that is produced by numeric field, G2 is the gain behind the numeric field, and G1 is gain before the numeric field, P
InBe feedback power, G3 is the numeric field gain, complete machine gain G=G1+G2.
The present invention has following advantage and effect with respect to prior art: need not increases hardware module in digital high-frequency amplification station equipment, and the software program that only needs to add in the FPGA of digital high-frequency amplification station module according to the inventive method design gets final product; Thereby need not additionally to increase the cost of equipment.
Description of drawings
Fig. 1 is the structural representation of digital high-frequency amplification station;
Fig. 2 is the flow chart of method for detecting isolation between of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing, but embodiments of the present invention are not limited to this.
Embodiment 1
As shown in Figure 1, method for detecting isolation between of the present invention based on digital high-frequency amplification station be of the prior art, it comprises that donor antenna port (DT), power amplifier (are called for short power amplifier, PA), frequency-variable module, low noise amplifier (LNA), digital signal processing module, filter (FIR), user antenna port (MT); Wherein, digital signal processing module comprises analog to digital converter (ADC), FPGA module and the digital to analog converter (DAC) that connects successively, is provided with digital controlled oscillator (NCO) in the FPGA module; The donor antenna port is used for being connected with donor antenna, and the user antenna port is used for being connected with user antenna.
At transmitting terminal, the FPGA inside modules produces a direct current signal, gives digital-to-analogue conversion (DA) chip after digital controlled oscillator (NCO) up-converts to low frequency signal (da_inf); At receiving terminal, intermediate-freuqncy signal (ad_inf) after the FPGA module is sampled to analog-to-digital conversion (AD) chip is carried out down-frequency conversion by digital controlled oscillator (NCO) and is moved 0 frequently, then (minute two-stage is carried out 0 frequency signal to be carried out 48 samplings, elder generation's 6 samplings, 8 samplings again), be low pass filter (LP) filtering of 10kHz through passband again, will count at last average energy and report supervisory control system, in order to be shown on the debugging software interface.
Repeater of the present invention off-line method for detecting isolation between is realized by the embedded software of FPGA module; Take the offline inspection mode, when equipment carried out the isolation detected state, a sense channel, rest channels Close All were only opened in supervisory control system control repeater.Produce a direct current signal by numeric field, this signal is converted to intermediate frequency through Digital Up Convert module (DUC), again after up-conversion changes to radio frequency, launched by transmitting antenna (TX antenna), the signal of emission receives from reception antenna (RX antenna) behind the space, after the radio-frequency front-end down-conversion, become intermediate frequency, finally enter numeric field with the form of direct current again through Digital Down Converter Module (DDC) frequency conversion.The FPGA module can calculate the current isolation of system by the power that detects feedback signal.After equipment withdrawed from the isolation detected state, the passage of opening when supervisory control system control repeater recovers to work again carried out the amplification of signal.
The formula proving of isolation is as follows:
If the some frequency power that is produced by numeric field is P
Out, the gain behind the numeric field is G2, and gain is G1 before the numeric field, and the feedback power that numeric field receives is P
In, the isolation of dual-mode antenna is ISO, the numeric field gain is G3, complete machine gain G.Have so:
ISO＝P
out+G1+G2-P
in ....................................①
Owing to (G1+G2) with the gain of complete machine relation being arranged, thus formula 1. deformability be:
ISO＝P
out+(G-G3)-P
in ....................................②
The processing procedure of above-mentioned core is finished by the FPGA module, and as shown in Figure 2, the handling process of FPGA inside modules comprises the steps:
(1) by supervisory control system, emissive porwer and the emission frequency of reception (should be emission) signal is set;
(2) the reception signal that receiving terminal is received carries out down-conversion, obtains down-conversion signal, uses primary link DDC passage down-conversion signal is done for the first time down-conversion sampling (in this enforcement, being 6 times of down-conversion samplings), obtains for the first time sampled signal;
(3) then to the first time sampled signal carry out down-conversion sampling second time (in this enforcements, being that 8 times of down-conversions are sampled), obtain the sampled signal second time;
(4) interference signal during filtering is sampled for the second time obtains (should be recovery) and transmits;
(5) carry out power statistic (should at receiving terminal, carry out power statistic to transmitting of recovery) to transmitting;
(6) power that counts on is reported to supervisory control system;
(7) supervisory control system calculates the isolation of system by the intensity that transmits and the difference that receives the intensity of signal; Computing formula be above-mentioned formula 2..
Like this, in the present embodiment, the described down-conversion sampling first time, the second time are 48 times of down-conversions samplings behind the down-conversion sample and stack.In the present invention, for the first time down-conversion sampling, for the second time down-conversion sampling are as long as satisfy the sampling law, namely require FS/ sampling multiple 〉=2B (FS is the speed that AD converter is given FPGA, and B is the bandwidth of the inner filter of FPGA), the sampling multiple after the stack is not limited to 48 times.
Above-described embodiment is the better execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (3)
1. the method that detects of a digital high-frequency amplification station off-line isolation is characterized in that may further comprise the steps:
(1) emissive porwer and the emission frequency that receives signal is set;
(2) the reception signal that receiving terminal is received carries out down-conversion, obtains down-conversion signal, and down-conversion signal is done for the first time down-conversion sampling, obtains for the first time sampled signal;
(3) then to the first time sampled signal carry out down-conversion sampling second time, obtain the sampled signal second time;
(4) interference signal during filtering is sampled is for the second time transmitted;
(5) carry out power statistic to transmitting;
(6) power that counts on is reported to supervisory control system;
(7) supervisory control system calculates the isolation of system by the intensity that transmits and the difference that receives the intensity of signal.
2. the method that detects of described digital high-frequency amplification station off-line isolation according to claim 1 is characterized in that, the down-conversion first time in the described step (2) is sampled as 6 times of down-conversions samplings; The down-conversion second time in the described step (3) is sampled as 8 times of down-conversion samplings.
3. the method that detects of described digital high-frequency amplification station off-line isolation according to claim 1 is characterized in that, the isolation ISO of described step (7) computing system, and formula is:
ISO＝P
out+(G-G3)-P
in
P
OutBe the some frequency power that is produced by numeric field, G2 is the gain behind the numeric field, and G1 is gain before the numeric field, P
InBe feedback power, G3 is the numeric field gain, complete machine gain G=G1+G2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110227704.9A CN102932071B (en) | 2011-08-10 | 2011-08-10 | Offline isolation detection method for digital repeater |
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| CN201110227704.9A CN102932071B (en) | 2011-08-10 | 2011-08-10 | Offline isolation detection method for digital repeater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390702A (en) * | 2017-12-28 | 2018-08-10 | 三维通信股份有限公司 | A kind of distributing antenna system far-end unit and implementation method for supporting full frequency band |
| CN109194419A (en) * | 2018-09-11 | 2019-01-11 | 京信通信系统（中国）有限公司 | One kind opening station method, apparatus, electronic equipment and storage medium |
| CN111162850A (en) * | 2019-12-27 | 2020-05-15 | 京信通信系统（中国）有限公司 | Isolation degree processing method, device, equipment and storage medium |
Citations (4)
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|---|---|---|---|---|
| CN1368828A (en) * | 2002-03-12 | 2002-09-11 | 武汉邮电科学研究院 | Automatic measuring technique for antenna isolating level of direct amplifying station with antenna transmission |
| CN1852059A (en) * | 2006-05-22 | 2006-10-25 | 京信通信技术(广州)有限公司 | Free-space optical transmission mobile communication digital peater |
| CN101615958A (en) * | 2008-06-27 | 2009-12-30 | 京信通信系统（中国）有限公司 | The method for detecting isolation between antennas of digital radio repeater system |
| US20100105406A1 (en) * | 2006-10-31 | 2010-04-29 | Qualcomm Incorporated | Inter-cell power control in the presence of fractional frequency reuse |
-
2011
- 2011-08-10 CN CN201110227704.9A patent/CN102932071B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1368828A (en) * | 2002-03-12 | 2002-09-11 | 武汉邮电科学研究院 | Automatic measuring technique for antenna isolating level of direct amplifying station with antenna transmission |
| CN1852059A (en) * | 2006-05-22 | 2006-10-25 | 京信通信技术(广州)有限公司 | Free-space optical transmission mobile communication digital peater |
| US20100105406A1 (en) * | 2006-10-31 | 2010-04-29 | Qualcomm Incorporated | Inter-cell power control in the presence of fractional frequency reuse |
| CN101615958A (en) * | 2008-06-27 | 2009-12-30 | 京信通信系统（中国）有限公司 | The method for detecting isolation between antennas of digital radio repeater system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108390702A (en) * | 2017-12-28 | 2018-08-10 | 三维通信股份有限公司 | A kind of distributing antenna system far-end unit and implementation method for supporting full frequency band |
| WO2019127859A1 (en) * | 2017-12-28 | 2019-07-04 | 三维通信股份有限公司 | Remote unit of distributed antenna system supporting full frequency band and implementation method therefor |
| CN109194419A (en) * | 2018-09-11 | 2019-01-11 | 京信通信系统（中国）有限公司 | One kind opening station method, apparatus, electronic equipment and storage medium |
| CN109194419B (en) * | 2018-09-11 | 2020-08-28 | 京信通信系统（中国）有限公司 | Station opening method and device, electronic equipment and storage medium |
| CN111162850A (en) * | 2019-12-27 | 2020-05-15 | 京信通信系统（中国）有限公司 | Isolation degree processing method, device, equipment and storage medium |
| CN111162850B (en) * | 2019-12-27 | 2022-03-01 | 京信网络系统股份有限公司 | Isolation degree processing method, device, equipment and storage medium |
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| CN102932071B (en) | 2015-02-11 |
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Effective date of registration: 20200116 Address after: 510663 Guangzhou Science City, Guangdong Shenzhou Road, No. 10 Patentee after: Jingxin Communication System (China) Co., Ltd. Address before: 510663, No. 6, Jin Lu, Guangzhou economic and Technological Development Zone, Guangdong, Guangzhou Patentee before: Jingxin Communication System (Guangzhou) Co., Ltd. |
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Address after: 510663 Shenzhou Road 10, Science City, Guangdong, Guangzhou Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 Shenzhou Road 10, Science City, Guangdong, Guangzhou Patentee before: Comba Telecom System (China) Ltd. |
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