CN101399619B - Method, apparatus for repeater bottom noise suppressing, and digital repeater - Google Patents
Method, apparatus for repeater bottom noise suppressing, and digital repeater Download PDFInfo
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Abstract
The invention is applicable to the communication field, and provides a method for suppressing background noise of a repeater, and a device and a system thereof. The method comprises the following steps: an intermediate frequency signal processed by an uplink covering side or access side of a digital repeater is received, the received intermediate frequency signal is sampled and subject to power accumulation to obtain a power accumulated value; the obtained power accumulated value is compared with a background noise threshold; and the received intermediate frequency signal is output according to the comparison result or the repeater is indicated to have no access signal. The method for suppressing the background noise of the repeater is realized by performing power accumulation on the received intermediate frequency signal of the uplink covering side or access side of the digital repeater after sampling, comparing the obtained power accumulated value with the background noise threshold, and outputting the received intermediate frequency signal according to the comparison result or indicating the repeater has no access signal. The method has the advantages of easy realization and reliable operation, avoids superposition effect resulting in cascade connection of the digital repeater, and reduces effect of the repeater on the operation of a base station.
Description
Technical field
The invention belongs to the communications field, relate in particular to method, device and digital high-frequency amplification station that a kind of repeater bottom noise suppresses.
Background technology
Direct discharging station has the low and rapid characteristics in increase coverage territory of cost of investment, becomes an indispensable part in radio network optimization and covering.But the wireless signal distance transmission system of repeater generally all adopts the analogue transmission technology.Wherein, analog optical fiber transmission system be exactly wherein adopt many a kind of.Because there is the defective of intrinsic noise stack in the analog optical fiber transmission means, cause the dynamic range of long-distance transmissions and subregion transmission to descend, be difficult to solve the long-distance transmissions of multi-carrier signal and the signal covering problem of large capacity, great dynamic range.In order to solve the existing above-mentioned technical problem of analog optical fiber transmission system, digital optical fiber repeater system arises at the historic moment.It is on the basis of traditional fiber repeater, adopt advanced Digital Signal Processing and digital signal optical fiber transmission technique, the signal of realizing the long-distance transmissions of multi-carrier mobile communication signal and large capacity, great dynamic range covers, for mobile communication system increased a kind of flexibly, great dynamic range and the remote novel means that covers of jumbo radiofrequency signal.
Digital high-frequency amplification station equipment is comprised of incoming end and capped end, is called descending by incoming end to the signals transmission of capped end; Be called up by capped end to the incoming end signal transmission.Portable terminal is to send the access request signal to the base station by up link, and the base station then is the request of replying portable terminal by down link.
From the technology applicable cases of existing industry, to the base station transmitted signal, in order to guarantee the real-time access of portable terminal, the repeater will keep channel status to portable terminal always by up link, but will there be two aspect problems in design like this:
First: even when not having portable terminal access, the repeater also will be to the base station transmitted signal, and what send is noise, like this, can reduce the treatment effeciency of base station, and can affect the noiseproof feature of base station.
Second: when cascade form work was adopted in the repeater, noises at different levels added up, and cause the uplink signal noise degradation.And along with the increase of cascade progression, noiseproof feature also worsens thereupon, has affected on the one hand the normal operation of repeater equipment; Limit on the other hand the progression of repeater cascade, reduced the flexibility that use the repeater; The most important thing is the lifting of making an uproar the end of along with, normal operation that can the severe jamming base station.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of repeater bottom noise inhibition method, even be intended to solve existing digital high-frequency amplification station when not having the portable terminal access, also will be to the base station transmitted noise, and the problem of the synergistic effect that causes during the digital high-frequency amplification station cascade.
The embodiment of the invention is achieved in that a kind of repeater bottom noise inhibition method, and described method comprises the steps:
Receive the intermediate-freuqncy signal that digital high-frequency amplification station up link capped end or up link incoming end are processed, cumulative to carrying out power behind the if signal sampling that receives, obtain the power accumulated value, described is to carry out the one or many sampling to carrying out power behind the if signal sampling that receives cumulative, the system that described digital high-frequency amplification station resets is gsm system, and the described repeatedly sampling number scope of sampling is 3-14;
The power accumulated value that obtains and the end thresholding of making an uproar is compared, and sampling number is larger, the thresholding of making an uproar of the corresponding end is also larger;
The intermediate-freuqncy signal that output receives according to comparative result or expression repeater are without the signal of access, and wherein, thresholding is large if the power accumulated value that obtains was made an uproar than the end, then export the intermediate-freuqncy signal that receives; Thresholding is little if the power accumulated value that obtains was made an uproar than the end, and then output expression repeater is without the signal of access.
Another purpose of the embodiment of the invention is to provide a kind of repeater bottom noise inhibition method, and described method comprises the steps:
Receive the intermediate-freuqncy signal that digital high-frequency amplification station down link capped end or down link incoming end are processed, cumulative to carrying out power behind the if signal sampling that receives, obtain the power accumulated value, described is to carry out the one or many sampling to carrying out power behind the if signal sampling that receives cumulative, the system that described digital high-frequency amplification station resets is gsm system, and the described repeatedly sampling number scope of sampling is 3-14;
The power accumulated value that obtains and the end thresholding of making an uproar is compared, and sampling number is larger, the thresholding of making an uproar of the corresponding end is also larger;
The intermediate-freuqncy signal that output receives according to comparative result or expression repeater are without the signal of access, and wherein, thresholding is large if the power accumulated value that obtains was made an uproar than the end, then export the intermediate-freuqncy signal that receives; Thresholding is little if the power accumulated value that obtains was made an uproar than the end, and then output expression repeater is without the signal of access.
Another purpose of the embodiment of the invention is to provide a kind of repeater bottom noise restraining device, and described device comprises:
Sampling unit, be used for receiving the intermediate-freuqncy signal of digital high-frequency amplification station up link capped end or the processing of up link incoming end, cumulative to carrying out power behind the if signal sampling that receives, obtain the power accumulated value, described is to carry out the one or many sampling to carrying out power behind the if signal sampling that receives cumulative, the system that described digital high-frequency amplification station resets is gsm system, and the described repeatedly sampling number scope of sampling is 3-14;
Comparing unit is used for power accumulated value that described sampling unit is obtained and the end thresholding of making an uproar and compares, and sampling number is larger, and the end of the correspondence thresholding of making an uproar is also larger; And
Output unit is used for exporting signal that described sampling unit receives or expression repeater without the signal of access according to the comparative result of described comparing unit, and wherein, thresholding is large if the power accumulated value that obtains was made an uproar than the end, then the intermediate-freuqncy signal that receives of output; Thresholding is little if the power accumulated value that obtains was made an uproar than the end, and then output expression repeater is without the signal of access.
Another purpose of the embodiment of the invention is to provide a kind of digital high-frequency amplification station that comprises above-mentioned repeater bottom noise restraining device.
Another purpose of the embodiment of the invention is to provide a kind of repeater bottom noise restraining device, and described device comprises:
Sampling unit, be used for receiving the intermediate-freuqncy signal of digital high-frequency amplification station down link capped end or the processing of down link incoming end, cumulative to carrying out power behind the if signal sampling that receives, obtain the power accumulated value, described is to carry out the one or many sampling to carrying out power behind the if signal sampling that receives cumulative, the system that described digital high-frequency amplification station resets is gsm system, and the described repeatedly sampling number scope of sampling is 3-14;
Comparing unit is used for power accumulated value that described sampling unit is obtained and the end thresholding of making an uproar and compares, and sampling number is larger, and the end of the correspondence thresholding of making an uproar is also larger; And
Output unit is used for exporting signal that described sampling unit receives or expression repeater without the signal of access according to the comparative result of described comparing unit, and wherein, thresholding is large if the power accumulated value that obtains was made an uproar than the end, then the intermediate-freuqncy signal that receives of output; Thresholding is little if the power accumulated value that obtains was made an uproar than the end, and then output expression repeater is without the signal of access.
Another purpose of the embodiment of the invention is to provide a kind of digital high-frequency amplification station that comprises above-mentioned repeater bottom noise restraining device.
In embodiments of the present invention, the intermediate-freuqncy signal of processing by receiving digital high-frequency amplification station up link capped end or incoming end, cumulative to carrying out power behind the if signal sampling that receives, the power accumulated value that obtains and the end thresholding of making an uproar is compared, and the intermediate-freuqncy signal that receives according to comparative result output or expression repeater are without the signal of access, realized a kind of repeater bottom noise inhibition method, realized simple, reliable operation, the synergistic effect that causes when avoiding the digital high-frequency amplification station cascade, reduce the impact on the base station functional reliability that introduce the repeater.
Description of drawings
Fig. 1 is the realization flow figure of the repeater bottom noise inhibition method that provides of the embodiment of the invention;
Fig. 2 is the structure chart of the repeater bottom noise restraining device that provides of the embodiment of the invention;
Fig. 3 is the structure chart of the digital high-frequency amplification station that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
In embodiments of the present invention, the intermediate-freuqncy signal of processing by receiving digital high-frequency amplification station up link capped end or incoming end, cumulative to carrying out power behind the if signal sampling that receives, the power accumulated value that obtains and the end thresholding of making an uproar is compared, and a kind of repeater bottom noise inhibition method has been realized without the signal of access in the intermediate-freuqncy signal that receives according to comparative result output or expression repeater.
Fig. 1 shows the realization flow of the repeater bottom noise inhibition method that the embodiment of the invention provides, and details are as follows:
In step S101, receive the intermediate-freuqncy signal that digital high-frequency amplification station up link capped end or incoming end are processed, cumulative to carrying out power behind the if signal sampling that receives, obtain the power accumulated value;
In the present embodiment, can be the intermediate-freuqncy signal that receives digital high-frequency amplification station up link capped end or incoming end processing, the intermediate-freuqncy signal that receives be carried out the one or many sampling, if just once sample, then the intermediate-freuqncy signal that samples is converted to performance number, is the power accumulated value; If repeatedly sample, the intermediate-freuqncy signal that then will repeatedly sample is converted to corresponding performance number, and the performance number that each is corresponding adds up and obtains the power accumulated value.Wherein, the one or many sampling respectively has pluses and minuses: once sampling realizes simply, but may cause erroneous judgement owing to the uncertainty of sampled point, can not guarantee the reliability of making an uproar and suppress in the end; The realization of repeatedly sampling is more once sampled complicated, but the performance number of multi-point sampling adds up, and can prevent that the uncertainty of sampled point from causing erroneous judgement, and guarantees the reliability of making an uproar and suppress in the end.
In step S102, the power accumulated value that obtains and the end thresholding of making an uproar is compared;
The make an uproar sampling precisions, down-conversion gain etc. of digital-to-analogue conversion of thresholding and up link of the end all are related, and relevant with sampling number n, and the n thresholding of making an uproar at the larger then corresponding end is also larger, and the end threshold value of making an uproar can be measured or calculate in engineering.
In step S103, the intermediate-freuqncy signal that output receives according to comparative result or expression repeater are without the signal of access.
In above-mentioned flow process, when the intermediate-freuqncy signal that receives is repeatedly sampled, can sample to the intermediate-freuqncy signal that receives according to default sample frequency, sampling number is made as n, with the cumulative power accumulated value that obtains of the power of this continuous n sampled point.Sampling number n is an important index, is related to the end performance that the setting of threshold value and the end make an uproar and suppress of making an uproar, and is subject to the impact of signal form in signal sampling frequency and the communication protocol.For example, in gsm system, carrier bandwidths is 200KHz, and sample frequency can be 3.84MHz, 3.84M/200K=19, and then the value of sampling number n is below 19.Because if the value of n surpasses 19, will sample the access signal of next moment capped end or incoming end.At this moment, the span of sampling number n generally is 1-15, and the recommendation span is 3-14, and more excellent span is 3-7.Certainly, sample frequency can be set as other values according to actual conditions, for gsm system, only needs sample frequency to get 200K * k, and k gets the integer greater than 2,1≤n≤K.In addition, for other the communication system such as CDMA, sampling number, sample frequency also can arrange by the same way according to its carrier bandwidths.
Wherein, step S103, the intermediate-freuqncy signal that output receives according to comparative result or expression repeater are specially without the step of the signal of access:
Thresholding is large if the power accumulated value that obtains was made an uproar than the end, then exports the intermediate-freuqncy signal that receives;
Thresholding is little if the power accumulated value that obtains was made an uproar than the end, and then output expression repeater is without the signal of access.
In the present embodiment, thresholding is large if the power accumulated value that obtains was made an uproar than the end, represents that then this carrier frequency has the signal input, and what receive is not noise, the intermediate-freuqncy signal that this moment, output received; Thresholding is little if the power accumulated value that obtains was made an uproar than the end, represents that then this carrier frequency does not have the signal input, and what receive is noise, and output expression repeater is without low level " 0 " signal of access.Output low level " 0 " signal is channel setting as without the state of making an uproar, and this moment, up link did not receive input signal, but guarantees that again path opening, because the access signal of repeater will be detected in the base station.
Certainly, the signal quality that receives in order to improve portable terminal, reduce the impact on the mobile terminal call quality that digital high-frequency amplification station is introduced, the intermediate-freuqncy signal that can adopt equally method that above-described embodiment provides that digital high-frequency amplification station down link capped end or incoming end are processed is carried out the end and is made an uproar and suppress to process.Further, also can adopt method that above-described embodiment provides that the uplink and downlink link of repeater is all carried out the end makes an uproar and suppresses to process.
Fig. 2 shows the structure of the repeater bottom noise restraining device that the embodiment of the invention provides, and only shows for convenience of explanation the part relevant with the embodiment of the invention.
This device can be used for digital high-frequency amplification station, the for example capped end of digital high-frequency amplification station up link, incoming end, can be the capped end that runs on the direct end uplink link, the unit that software unit, hardware cell or software and hardware in the incoming end combine, also can be used as in capped end that suspension member independently is integrated into the digital high-frequency amplification station up link, the incoming end or run in the application system of capped end, incoming end of digital high-frequency amplification station up link, wherein:
The power accumulated value that comparing unit 202 obtains sampling unit 201 and the default end thresholding of making an uproar compares.
The signal that output unit 203 receives according to the comparative result of comparing unit 202 output sampling unit 201 or expression repeater are without the signal of access.
Wherein, the repeater bottom noise restraining device that the embodiment of the invention provides can adopt Verilog HDL programming to realize that developing instrument is Xilinx ise 9.2i.The calculating of 201 pairs of sampled point performance numbers of sampling unit can adopt multiplier to realize, the signal of input is the digital signal of 16bit, and being scaled power then is 16bit * 16bit=32bit, so adopt the multiplier that is output as 32bit.Input signal for other figure places can similar designs.
Equally, the signal quality that receives in order to improve portable terminal reduces the impact on the mobile terminal call quality that digital high-frequency amplification station is introduced, and the repeater bottom noise restraining device that above-described embodiment can be provided is used for the down link of digital high-frequency amplification station.At this moment, 201 of sampling units receive the intermediate-freuqncy signal of digital high-frequency amplification station down link capped end or incoming end processing, and cumulative to carrying out power behind the if signal sampling that receives, and obtain the power accumulated value.
Fig. 3 shows the structure of the digital high-frequency amplification station of the employing repeater bottom noise restraining device that the embodiment of the invention provides, and only shows for convenience of explanation the part relevant with the embodiment of the invention.
In embodiments of the present invention, the AD conversion unit 3011 of digital high-frequency amplification station up link capped end 301, Digital Down Convert unit 3012, repeater bottom noise restraining device 3013 and signal are processed and Structural Transformation unit 3014 is linked in sequence, repeater bottom noise restraining device 3013 with the intermediate-freuqncy signal of Digital Down Convert unit 3012 output carry out the end make an uproar suppress to process after, export to signal and process and Structural Transformation unit 3014.At this moment, the processing of repeater bottom noise restraining device 3013 and signal and Structural Transformation unit 3014 can adopt field programmable gate array (Field Programmable Gate Array, FPGA) to realize.
Certainly, repeater bottom noise restraining device 3013 also can be between the signal processing and Structural Transformation unit 3021 and Digital Up Convert unit 3022 of digital high-frequency amplification station up link incoming end 302, and the signal of direct end uplink link incoming end 302 is processed and Structural Transformation unit 3021, repeater bottom noise restraining device 3013, Digital Up Convert unit 3022 and D/A conversion unit 3023 are linked in sequence.Like this, the processing of repeater bottom noise restraining device 3013 and signal and Structural Transformation unit 3021 can adopt FPGA to realize.Further, the optional position that repeater bottom noise restraining device 3013 can be between digital high-frequency amplification station up link Digital Down Convert unit 3012 and Digital Up Convert unit 3022.
Equally, the signal quality that receives in order to improve portable terminal, reduce the impact on the mobile terminal call quality that digital high-frequency amplification station is introduced, when the digital high-frequency amplification station down link was introduced the repeater bottom noise restraining device, its installation or setting position were with identical for the digital high-frequency amplification station up link.
In embodiments of the present invention, the intermediate-freuqncy signal of processing by receiving digital high-frequency amplification station up link capped end or incoming end, cumulative to carrying out power behind the if signal sampling that receives, the power accumulated value that obtains and the end thresholding of making an uproar is compared, and the intermediate-freuqncy signal that receives according to comparative result output or expression repeater are without the signal of access, realized a kind of repeater bottom noise inhibition method, realized simple, reliable operation, the synergistic effect that causes when avoiding the digital high-frequency amplification station cascade, reduce the impact on the base station functional reliability that introduce the repeater.
And, carry out multi-point sampling by the intermediate-freuqncy signal that digital direct end uplink link capped end or incoming end are received, can prevent that the uncertainty of sampled point from causing erroneous judgement, guarantee the reliability of making an uproar and suppress in the end.
One of ordinary skill in the art will appreciate that, realize that all or part of step in above-described embodiment method is to come the relevant hardware of instruction to finish by program, described program can be in being stored in a computer read/write memory medium, described storage medium is such as ROM/RAM, disk, CD etc.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a repeater bottom noise inhibition method is characterized in that, described method comprises the steps:
Receive the intermediate-freuqncy signal that digital high-frequency amplification station up link capped end or up link incoming end are processed, cumulative to carrying out power behind the if signal sampling that receives, obtain the power accumulated value, described is to carry out the one or many sampling to carrying out power behind the if signal sampling that receives cumulative, the system that described digital high-frequency amplification station resets is gsm system, and the described repeatedly sampling number scope of sampling is 3-14;
The power accumulated value that obtains and the end thresholding of making an uproar is compared, and sampling number is larger, the thresholding of making an uproar of the corresponding end is also larger;
The intermediate-freuqncy signal that output receives according to comparative result or expression repeater are without the signal of access, and wherein, thresholding is large if the power accumulated value that obtains was made an uproar than the end, then export the intermediate-freuqncy signal that receives; Thresholding is little if the power accumulated value that obtains was made an uproar than the end, and then output expression repeater is without the signal of access.
2. a repeater bottom noise inhibition method is characterized in that, described method comprises the steps:
Receive the intermediate-freuqncy signal that digital high-frequency amplification station down link capped end or down link incoming end are processed, cumulative to carrying out power behind the if signal sampling that receives, obtain the power accumulated value, described is to carry out the one or many sampling to carrying out power behind the if signal sampling that receives cumulative, the system that described digital high-frequency amplification station resets is gsm system, and the described repeatedly sampling number scope of sampling is 3-14;
The power accumulated value that obtains and the end thresholding of making an uproar is compared, and sampling number is larger, the thresholding of making an uproar of the corresponding end is also larger;
The intermediate-freuqncy signal that output receives according to comparative result or expression repeater are without the signal of access, and wherein, thresholding is large if the power accumulated value that obtains was made an uproar than the end, then export the intermediate-freuqncy signal that receives; Thresholding is little if the power accumulated value that obtains was made an uproar than the end, and then output expression repeater is without the signal of access.
3. a repeater bottom noise restraining device is characterized in that, described device comprises:
Sampling unit, be used for receiving the intermediate-freuqncy signal of digital high-frequency amplification station up link capped end or the processing of up link incoming end, cumulative to carrying out power behind the if signal sampling that receives, obtain the power accumulated value, described is to carry out the one or many sampling to carrying out power behind the if signal sampling that receives cumulative, the system that described digital high-frequency amplification station resets is gsm system, and the described repeatedly sampling number scope of sampling is 3-14;
Comparing unit is used for power accumulated value that described sampling unit is obtained and the end thresholding of making an uproar and compares, and sampling number is larger, and the end of the correspondence thresholding of making an uproar is also larger; And
Output unit is used for exporting signal that described sampling unit receives or expression repeater without the signal of access according to the comparative result of described comparing unit, and wherein, thresholding is large if the power accumulated value that obtains was made an uproar than the end, then the intermediate-freuqncy signal that receives of output; Thresholding is little if the power accumulated value that obtains was made an uproar than the end, and then output expression repeater is without the signal of access.
4. digital high-frequency amplification station that comprises the described repeater bottom noise restraining device of claim 3.
5. a repeater bottom noise restraining device is characterized in that, described device comprises:
Sampling unit, be used for receiving the intermediate-freuqncy signal of digital high-frequency amplification station down link capped end or the processing of down link incoming end, cumulative to carrying out power behind the if signal sampling that receives, obtain the power accumulated value, described is to carry out the one or many sampling to carrying out power behind the if signal sampling that receives cumulative, the system that described digital high-frequency amplification station resets is gsm system, and the described repeatedly sampling number scope of sampling is 3-14;
Comparing unit is used for power accumulated value that described sampling unit is obtained and the end thresholding of making an uproar and compares, and sampling number is larger, and the end of the correspondence thresholding of making an uproar is also larger; And
Output unit is used for exporting signal that described sampling unit receives or expression repeater without the signal of access according to the comparative result of described comparing unit, and wherein, thresholding is large if the power accumulated value that obtains was made an uproar than the end, then the intermediate-freuqncy signal that receives of output; Thresholding is little if the power accumulated value that obtains was made an uproar than the end, and then output expression repeater is without the signal of access.
6. digital high-frequency amplification station that comprises the described repeater bottom noise restraining device of claim 5.
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| CN101938821B (en) * | 2009-09-29 | 2013-06-05 | 厦门大学 | Method for inhibiting uplink back noise of digital optical fiber repeater |
| CN101977392A (en) * | 2010-10-26 | 2011-02-16 | 三维通信股份有限公司 | Method for detecting input and output power of digital repeater |
| CN102170690B (en) * | 2011-04-20 | 2014-08-20 | 京信通信系统（中国）有限公司 | A gain control method of a WCDMA radio remote unit |
| CN106953677B (en) * | 2017-03-17 | 2020-08-11 | 宁波德泰信息科技有限公司 | Repeater station |
| CN112751602B (en) * | 2020-12-18 | 2021-08-17 | 广州东峰通信科技有限公司 | Digital one-to-four micropower repeater |
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| CN1317896A (en) * | 2000-04-07 | 2001-10-17 | 三星电子株式会社 | Method for controlling power in radio communicating system |
| CN1445952A (en) * | 2002-12-24 | 2003-10-01 | 大唐移动通信设备有限公司 | Reception control method in code division multiple access mobile communication system |
| CN1929328A (en) * | 2005-09-05 | 2007-03-14 | 中兴通讯股份有限公司 | Method for improving power control performance of mobile communication system |
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| CN1317896A (en) * | 2000-04-07 | 2001-10-17 | 三星电子株式会社 | Method for controlling power in radio communicating system |
| CN1445952A (en) * | 2002-12-24 | 2003-10-01 | 大唐移动通信设备有限公司 | Reception control method in code division multiple access mobile communication system |
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Address after: 518000 5th floor, building 1, Guoren science and Technology Park, the intersection of Jinxiu middle road and Cuijing Road, Longtian street, Pingshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Guoren Technology Co., Ltd Address before: 518000 building of three people's road, middle science and technology, Nanshan District science and Technology Park, Shenzhen, Guangdong Patentee before: CHINA GRENTECH CORPORATION Ltd. |
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| CP03 | Change of name, title or address |