CN101321010A - Digital covering method and system - Google Patents
Digital covering method and system Download PDFInfo
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- CN101321010A CN101321010A CNA2008100655065A CN200810065506A CN101321010A CN 101321010 A CN101321010 A CN 101321010A CN A2008100655065 A CNA2008100655065 A CN A2008100655065A CN 200810065506 A CN200810065506 A CN 200810065506A CN 101321010 A CN101321010 A CN 101321010A
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Abstract
A digital overlay covering method includes a down link trunking and an up link trunking, wherein the down link trunking includes: receiving the signals, processing the signals, packing the framing digital signals, transmitting to a plurality of covering units through the optical fiber or five line transmissions, decoding the frame, completing the signal coverage transmitted by the antenna; the up link trunking comprises: receiving the signal, processing the signal, packing the framing digital signal, transmitting to the access unit through the optical fiber or five line transmissions, decoding the frame, transmitting to the base station system through the antenna of the access unit or the potical fiber/five line transmissions. The invention also provides a digital covering system. The method and the system of the invention adopt the digital signal processing, the digital signal transmission, the digital distribution, reduce the loss and the noise of the signal. An access unit is added at the entrance of the building, transmitted to the inside of the building through the wiring, and the coverage unit is accessed at the required position, namely reaching the requirement to be compatible of the multi-system and multi-frequency range, to complete the coverage of the signal.
Description
[technical field]
The present invention relates to the indoor soverlay technique of the communications field, relate in particular to the method and system that adopt digital form to carry out indoor covering.
[background technology]
In the modern metropolitan cities, building is more and more higher, more and more, more and more intensive, and these buildings many be skeleton with the reinforced concrete structure, add fully closed interior and exterior finishes, seriously shield and the wireless signal of the radio communication that decayed; In addition, at the bottom of skyscraper, as places such as underground parking, market place builet below the grounds, wireless signal is all very weak usually or even do not have a wireless signal.
For solving the indoor covering problem of above wireless signal, usually the method that adopts is built indoor distributed system exactly at present, signal of base station is introduced directly into each indoor zone by wired mode, again by small size antenna at indoor transmitting base station signal, thereby reach coverage hole in the decontamination chamber, suppress to disturb, for indoor user provides stable, reliable wireless signal.
Indoor distributed system has two kinds of simulation indoor distributed system and digital indoor distributed systems.
The simulation indoor distributed system has two kinds of schemes, is respectively active indoor distributed system and passive indoor distributed system.Active compartment system adopts microcellulor or repeater main frame as signal source, in conjunction with the signal method in each corner in the trunk amplifier covering chamber.This simulation indoor distributed system also can cause problems such as signal of communication degradation, bottom noise rise be excessive when the feeder line of cable is long except needs use a large amount of radio frequency cable, coupler, power splitter.These problems can cause the speech quality variation, reduce up coverage, call completing rate is low, easy call drop etc., and serious also can connect phone.Passive indoor distributed system mostly is the POI system, and this system can't solve the problem of feeder line signal fadeout when longer.
The scheme of numeral indoor distributed system has scheme and the indoor base station scheme of digital optical fiber direct station and BBU (Base Band Unit)+RRU (Remote Radio Unit).These schemes all can't solve the needs that indoor distributed system needs compatible multi-modulation scheme, multiband.
[summary of the invention]
Based on having various weak points in the above-mentioned prior art indoor distributed system, the objective of the invention is to propose a kind of intelligent wiring system that utilizes in the building, can reach the requirement that compartment system needs compatible multi-modulation scheme, multiband.
For achieving the above object, technical scheme provided by the present invention is:
A kind of digital covering method comprises downlink relay and uplink relay, it is characterized in that: described downlink relay may further comprise the steps,
A, receive downlink radio-frequency signal or baseband signal from base station system, if the signal that receives be baseband signal then be processed into the analog if signal of certain bandwidth and do analog to digital conversion by baseband signal processing module, forward step C to after converting digital signal to;
B, the downlink radio-frequency signal that receives in the steps A is downconverted into the analog if signal of certain bandwidth and does analog to digital conversion, convert digital signal to;
C, with digital signal that is converted in the steps A or the digital signal that converts to by step B, handle, be packaged as the digital signal of framing according to the frame structure of definition;
D, the digital signal of the framing that obtains among the step C is transferred to some capping units by optical fiber or category-5 cable, capping unit is separated frame to this signal according to the frame structure of definition, and do and launch by antenna after upconversion process reverts to radiofrequency signal, promptly finish the covering of signal;
Described uplink relay may further comprise the steps,
The antenna of E, capping unit receives upward signal, and capping unit carries out down-conversion and does analog to digital conversion the upward signal that receives, and handles, is packaged as the digital signal of framing again according to the frame structure of definition;
F, the digital signal of the framing that obtains in the step e is transferred to access unit by optical fiber or category-5 cable, access unit is separated frame according to the frame structure of definition;
G, if upward signal is corresponding with downlink radio-frequency signal, then separating after the digital signal digital to analog conversion behind the frame and doing frequency up-converted is radiofrequency signal, launches by the antenna of access unit;
H, if upward signal is corresponding with the downgoing baseband signal, then separate after the digital signal digital to analog conversion behind the frame to handle and then be transferred to base station system by optical fiber or category-5 cable by baseband signal processing module.
Further, after the digital signal of the framing that described step D obtains step C is transferred to capping unit by optical fiber or category-5 cable, be divided into following steps,
D1, capping unit receive the digital signal of this framing, and the digital signal of transmitting described framing is to the signal extraction module;
D2, signal extraction module are finished the frame of separating of data according to the frame structure of definition under the assistance of monitoring module;
D3, separate respective data transfer behind the frame, convert the analog if signal of certain bandwidth to the DAC module;
The analog if signal of D4, the above-mentioned certain bandwidth of transmission becomes radiofrequency signal to radiofrequency emitting module with the analog if signal frequency up-converted of certain bandwidth;
The antenna of D5, radiofrequency emitting module is launched this radiofrequency signal, finishes signal and covers.
Further, described step e is divided into following steps,
The antenna of E1, Receiver Module receives the radiofrequency signal that the user sends;
E2, the above-mentioned radiofrequency signal of transmission become this radiofrequency signal frequency down-converts the analog if signal of certain bandwidth to Receiver Module;
The analog if signal of E3, the above-mentioned certain bandwidth of transmission converts digital signal and the digital signal that obtains of transmission to the signal insert module to the ADC module;
E4, signal insert module are finished framing, the packing of digital signal according to the frame structure of definition under the assistance of monitoring module;
Digital data transmission after E5, framing, the packing is carried out the further work step to the coffret module through entering after the signal processing.
Further, the frame structure of described definition is followed successively by synchronization slot, signalling time slot, GSM signal, TD-SCDMA signal, WCDMA signal, other standard signal time slot and reserved time slots; Analog signal between the analog if signal of described certain bandwidth refers to from 30M to 200M; Described certain time slot refers to the synchro system according to described frame structure.
Further, in the described steps A, receive downstream signal, receive by optical fiber or cable connected mode with by spatial coupling from base station system.
Further, described downstream signal type comprises GSM, CDMA, CDMA2000, WCDMA and TD-SCDMA signal, and the radiofrequency signal that is the above-mentioned type is or/and baseband signal; Described upward signal type comprises GSM, CDMA, CDMA2000, WCDMA and TD-SCDMA signal.
Simultaneously, the present invention also provides a kind of digital covering system that utilizes this digital covering method, comprise access unit and capping unit, it is characterized in that described access unit comprises access module, ADC module, baseband signal processing module, data combination module, coffret module, data separating module, DAC module, output module, monitoring module and power module; Wherein access module, ADC module, data combination module, coffret module are connected in series according to the order of sequence successively and form down link, and coffret module, separation module, DAC module, output module are connected in series according to the order of sequence successively and form up link; Simultaneously access module also by baseband signal processing module be connected with the data combination module, output module also is connected with the data separating module by baseband signal processing module, monitoring module connects data composite module and data separating module simultaneously, and power module is responsible for powering to access unit;
Described capping unit comprises coffret module, signal extraction module, DAC module, ifd module, radiofrequency emitting module, antenna, Receiver Module, ADC module, signal insert module, monitoring module and power-supply system, wherein the coffret module is connected to signal extraction module and signal insert module, and signal extraction module, DAC module, ifd module, radiofrequency emitting module and antenna are connected in series the formation down link in regular turn; Antenna, Receiver Module, ifd module, ADC module, signal insert module are connected in series the formation up link in regular turn simultaneously, and monitoring module is connected with the signal insert module with the signal extraction module simultaneously, and power-supply system is responsible for powering to capping unit;
Signal transmission between described access unit and the capping unit is passed through Optical Fiber Transmission by fiber optical transceiver, or is transmitted by category-5 cable by the ethernet network interface module.
Further, in the described access unit, access module, ADC module, DAC module and output module are the board plug type overall structure according to the different designs of signaling mode.
Further, in the described capping unit, DAC module, radiofrequency emitting module, Receiver Module and ADC module are the board plug type overall structure according to the different designs of signaling mode.
Further, the capping unit of described digital covering system is one or more.
Method of the present invention and system adopt Digital Signal Processing, digital data transmission, digital distribution, have reduced loss, the noise of signal.Only need porch at building, increase access unit, downstream signal with the various standards of base station system, receive, handle, analog signal conversion is become numeral, after set frame structure framing, packing, be transferred to each position of building by existing wiring, insert capping unit in the position of needs and can reach the requirement that compartment system needs compatible multi-modulation scheme, multiband, finish the covering of signal.And utilize the intelligent wiring system of building, and then reduced quantities and engineering difficulty, improved the property access.
[description of drawings]
Fig. 1 is a schematic diagram of the present invention;
Fig. 2 is an access unit flow chart of the present invention;
Fig. 3 is a capping unit flow chart of the present invention;
Fig. 4 is the frame assumption diagram of signal among the present invention;
Fig. 5 is an overall structure block diagram of the present invention;
Fig. 6 is the structured flowchart of access unit of the present invention;
Fig. 7 is the structured flowchart of capping unit of the present invention.
[embodiment]
The objective of the invention is to propose a kind ofly utilize the intelligent wiring system in the building can reach the requirement that compartment system needs compatible multi-modulation scheme, multiband, finish the method and the system of the covering of signal.
Below in conjunction with specific embodiment and accompanying drawing in detail the present invention is described in detail.Because system provided by the present invention complements each other with the method that is provided, the unified introduction so method and system of the present invention are put together.
In conjunction with Fig. 1,2,3, a kind of digital covering method provided by the invention comprises downlink relay and uplink relay, the basic contrary of each course of work in downlink relay and the uplink relay wherein, and concrete downlink relay may further comprise the steps,
A, receive downlink radio-frequency signal or baseband signal from base station system, if the signal that receives be baseband signal then be processed into the analog if signal of certain bandwidth and do analog to digital conversion by baseband signal processing module, forward step C to after converting digital signal to;
B, the downlink radio-frequency signal down-converted that receives in the steps A is become the analog if signal of certain bandwidth and does analog to digital conversion, convert digital signal to;
C, with digital signal that is converted in the steps A or the digital signal that converts to by step B, handle, be packaged as the digital signal of framing according to the frame structure of definition;
D, the digital signal of the framing that obtains among the step C is transferred to some capping units by optical fiber or category-5 cable, capping unit is separated frame to this signal according to the frame structure of definition, and do and launch by antenna after upconversion process becomes radiofrequency signal, promptly finish the covering of signal;
Uplink relay may further comprise the steps,
The antenna of E, capping unit receives upward signal, and capping unit carries out doing analog to digital conversion after the down-converted to the upward signal that receives, and handles, is packaged as the digital signal of framing again according to the frame structure of definition;
F, the digital signal of the framing that obtains in the step e is transferred to access unit according to certain time slot by optical fiber or category-5 cable, access unit is separated frame according to the frame structure of definition;
G, if upward signal is corresponding with downlink radio-frequency signal, then separating after the digital signal digital to analog conversion behind the frame and doing frequency up-converted is radiofrequency signal, launches by the antenna of access unit;
H, if upward signal is corresponding with the downgoing baseband signal, then separate after the digital signal digital to analog conversion behind the frame to handle and then be transferred to base station system by optical fiber or category-5 cable by baseband signal processing module.
After wherein the digital signal of step D framing that step C is obtained is transferred to capping unit by optical fiber or category-5 cable, be divided into following steps,
D1, capping unit receive the digital signal of this framing, and the digital signal of transmitting described framing is to the signal extraction module;
D2, signal extraction module are finished the frame of separating of data according to the frame structure of definition under the assistance of monitoring module;
D3, separate respective data transfer behind the frame, convert the analog if signal of certain bandwidth to the DAC module;
The analog if signal of D4, the above-mentioned certain bandwidth of transmission becomes radiofrequency signal to radiofrequency emitting module with the analog if signal frequency up-converted of certain bandwidth;
The antenna of D5, radiofrequency emitting module is launched this radiofrequency signal, finishes signal and covers.
And further, described step e is divided into following steps,
E1, radio frequency reception antenna receive the radiofrequency signal that the user sends;
E2, the above-mentioned radiofrequency signal of transmission are to Receiver Module, and Receiver Module is adjusted the size of up radiofrequency signal power as required, and this radiofrequency signal frequency down-converts is become the analog if signal of certain bandwidth;
The analog if signal of E3, the above-mentioned certain bandwidth of transmission converts digital signal and the digital signal that obtains of transmission to the signal insert module to the ADC module;
E4, signal insert module are finished framing, the packing of digital signal according to the frame structure of definition under the assistance of monitoring module;
Digital signal after E5, framing, the packing to the coffret module, is carried out further work step through entering after the signal processing according to certain slot transmission.
In the described steps A, baseband signal processing module is processed into the analog if signal of certain bandwidth, and this analog if signal is the analog if signal through just can directly launching after the upconversion process.
Analog signal between the analog if signal of above-mentioned certain bandwidth refers to from 30M to 200M especially refers to the analog signal from 30M to 60M; Above-mentioned certain time slot refers to the synchro system according to described frame structure.
In steps A of the present invention, reception is from the downstream signal of base station system, receive by optical fiber or cable connected mode with by spatial coupling, this downstream signal type comprises GSM, CDMA, CDMA2000, WCDMA and TD-SCDMA signal, and radiofrequency signal that can the above-mentioned type also can be the baseband signal of the above-mentioned type; And the upward signal type comprises that also GSM, CDMA, CDMA2000, WCDMA and TD-SCDMA etc. are applicable to the signal of the various standards of the method.
In conjunction with Fig. 1 and Fig. 5.As everyone knows, buildings such as existing building, the intelligent wiring system that oneself is all arranged, and the present invention utilizes existing wiring system just, direct porch at building, increase access unit, downstream signal with the various standards of base station system, receive, handle, will be according to the digital signal that obtains after digital signal that obtains after handling in the said method or the conversion process, according to set frame structure framing, be packaged as the digital signal of framing, transfer to each position of building according to certain time slot by existing wiring system again, the covering that capping unit can be finished signal is installed in the position of needs.Access unit can support to comprise the downlink radio-frequency signal from base station systems such as GSM, CDMA, CDMA2000, WCDMA, TD-SCDMA, or downgoing baseband signal (baseband signal is a digital signal), is connected to access unit by the radio frequency reception or by optical fiber.After access unit converts various standard signals to digital signal, be treated to the digital signal of framing, be transferred to capping unit by optical fiber or category-5 cable, launch via antenna according to certain time slot according to frame structure framing, packing.In the present invention, the antenna of capping unit can adopt external antenna also can adopt built-in aerial.Upward signal then by with the process of downstream signal contrary, after the antenna reception by capping unit, change into digital signal by capping unit, and behind the extraction coherent signal, according to frame structure framing, packing, digital signal after the packing is transferred to access unit according to certain time slot by optical fiber or category-5 cable, access unit is with the upward signal that receives, after separating frame according to frame structure, or, launch by the antenna of base station system by being transferred to base station system by optical fiber or category-5 cable after the baseband signal processing module processing.Or change into radiofrequency signal through up-conversion, launch via antenna.
Frame structure such as Fig. 4 of above-mentioned definition describe, and at first are synchronization slot and signalling time slot, are GSM signal slot, TD-SCDMA signal slot, WCDMA signal slot, CDMA signal slot, CDMA2000 signal slot then, reserve reserved time slot at last.
Below in conjunction with Fig. 2, Fig. 3 and Fig. 6, Fig. 7, understand the structure of access unit and capping unit.
Structured flowchart as the access unit of Fig. 6, access module is connected to the ADC module, and the ADC module is connected to the data combination module, and the data combination module is connected to the coffret module, the coffret module can be fiber optical transceiver or ethernet network interface module at different transmission mediums.The coffret module connects the data separation module, the data separating module connects the DAC module, the DAC module connects output module, simultaneously access module also by baseband signal processing module be connected with the data combination module, output module also is connected with the data separating module by baseband signal processing module, monitoring module connects data composite module and data separating module respectively, and power module is responsible for powering to access unit.As the structured flowchart of the capping unit of Fig. 7, the coffret module is connected to the signal extraction module, and the signal extraction module is connected to the DAC module, and the DAC module is connected to ifd module and is connected to radiofrequency emitting module, and radiofrequency emitting module is connected to antenna.Antenna connects Receiver Module simultaneously, Receiver Module is connected with the ADC module by ifd module, the ADC module connects the signal insert module, the signal insert module is connected to the coffret module, the monitoring module of capping unit is connected with the signal insert module with signal extraction simultaneously, capping unit is provided with power-supply system, and this power-supply system is the POE remote power feeding or passes through the power supply of power supply matching device.
As Fig. 2, the access unit of Fig. 3, the capping unit workflow, the downstream signal of base station enters access module, access module is made up of the unit block of unlike signal standard, after the unit block reception of downstream signal by the corresponding signal standard, through filtering, (wherein downstream signal comprises the GSM signal to convert the analog if signal of certain bandwidth after the down-conversion to, the WCDMA signal, the CDMA signal, it promptly may be the radiofrequency signal of the above-mentioned type, it also may be baseband signal, or comprise radiofrequency signal and baseband signal simultaneously), the analog if signal of the certain bandwidth after the conversion, carry out the A/D conversion by the ADC module, convert digital signal to, be input to the data combination module then, the baseband signal that receives is then without the ADC module, after the driving buffering of baseband signal processing module, be directly inputted to the data combination module, the data combination module is with the baseband signal of input, according to frame structure, under the assistance of monitoring module, carry out framing, packing is treated to the digital signal of framing, digital signal after the packing is sent to the coffret unit according to certain time slot, the coffret unit can be fiber optical transceiver or ethernet network interface module at different transmission mediums.The coffret module is transferred to capping unit with signal by optical fiber or category-5 cable, the coffret module of capping unit comprises fiber optical transceiver or ethernet network interface module, the coffret module of capping unit will receive the downstream signal that transmits from optical fiber or category-5 cable, send the signal extraction module to, the signal extraction module is finished the frame of separating of data according to frame structure under the assistance of monitoring module, and the corresponding data that will separate behind the frame sends the DAC module to, convert the analog if signal of certain bandwidth to, send radio-frequency module to, radiofrequency emitting module upconverts to corresponding radiofrequency signal with the analog signal of the different systems that receives, by the radio-frequency transmissions circuit, launch through antenna.In the phase inverse process of up link, the upward signal of each standard receives by the antenna of capping unit, through down-conversion, convert the analog if signal of certain bandwidth to, send the ADC module to, the ADC module is sampled to the analog if signal of certain bandwidth, converts digital signal to, sends the signal insert module to, the signal insert module is under the assistance of monitoring module, according to frame structure, finish the framing of signal, packing, digital signal after the packing sends the coffret module to according to certain time slot, through signal filtering, drive, after the conversion of signals, convert light signal or network signal to, arrive access unit by category-5 cable or Optical Fiber Transmission; Upward signal by the capping unit transmission, through the coffret module, be sent to the data separating module, the data separating module is under the assistance of monitoring module, according to frame structure, finish and separate frame, solve the signal of corresponding standard, baseband signal is sent to the unit module of the corresponding standard of output module, through driving, after the buffering, send the base station to, intermediate-freuqncy signal is sent to the DAC module, converts the analog if signal of certain bandwidth to, is sent to corresponding standard output module, by output module the analog if signal of certain bandwidth is up-converted to radiofrequency signal, radiating portion is transmitted to the base station.
Shown in the access unit of Fig. 6, in order to save cost, reduction expense expenditure, access module, ADC module, DAC module and output module are the board plug type overall structure according to the different designs of signaling mode, just can select the plate of different systems like this for use at the system of different systems, according to the RST that reality inserts, flexible configuration.In like manner, in the capping unit of Fig. 7, DAC module, radiofrequency emitting module, Receiver Module and ADC module are the board plug type overall structure according to the different designs of signaling mode also.
Digital covering method of the present invention and system adopt digital signaling that signal is handled, distribute with digital mode, reach the covering of wireless signal, avoided when indoor distribution, adopting radio circuit, power splitter etc. to cause problems such as signal attenuation, noise increase, power system capacity reduction, also avoided signal with the big more problem of the increase loss of cable length.This method and system utilize existing intelligent wiring system in the building fully, only need to increase access unit and capping unit, need not any radio frequency cable, can finish indoor covering, and reduced quantities and engineering difficulty, improved the property access.Can accomplish technically simultaneously that receiving terminal can insert the radiofrequency signal and the baseband signal of multi-modulation scheme simultaneously, by optical fiber or category-5 cable transmission, capped end adopts built-in aerial, small-power to the sets of signals of multi-modulation scheme in same protocol package, do not need external antenna during covering, directly use netting twine to cover.
Above-described only is better embodiment of the present invention, and it describes comparatively concrete and detailed, can not therefore be interpreted as the restriction to claim of the present invention.Should be understood that; for the person of ordinary skill of the art; without departing from the inventive concept of the premise; in the scope of technical solution of the present invention; utilize the technology contents of above-mentioned announcement to make some changes or be modified to the equivalent embodiment of equivalent variations, these all belong to protection scope of the present invention.
Claims (10)
1, a kind of digital covering method comprises downlink relay and uplink relay, it is characterized in that: described downlink relay may further comprise the steps,
A, receive downlink radio-frequency signal or baseband signal from base station system, if the signal that receives be baseband signal then be processed into the analog if signal of certain bandwidth and do analog to digital conversion by baseband signal processing module, forward step C to after converting digital signal to;
B, the downlink radio-frequency signal down-converted that receives in the steps A is become the analog if signal of certain bandwidth and does analog to digital conversion, convert digital signal to;
C, with digital signal that is converted in the steps A or the digital signal that converts to by step B, handle, be packaged as the digital signal of framing according to the frame structure of definition;
D, the digital signal of the framing that obtains among the step C is transferred to some capping units by optical fiber or category-5 cable, capping unit is separated frame to this signal according to the frame structure of definition, and do and launch by antenna after upconversion process becomes radiofrequency signal, promptly finish the covering of signal;
Described uplink relay may further comprise the steps,
The antenna of E, capping unit receives upward signal, and capping unit carries out doing analog to digital conversion after the down-converted to the upward signal that receives, and handles, is packaged as the digital signal of framing again according to the frame structure of definition;
F, the digital signal of the framing that obtains in the step e is transferred to access unit according to certain time slot by optical fiber or category-5 cable, access unit is separated frame according to the frame structure of definition;
G, if upward signal is corresponding with downlink radio-frequency signal, then separating after the digital signal digital to analog conversion behind the frame and doing frequency up-converted is radiofrequency signal, launches by the antenna of access unit;
H, if upward signal is corresponding with the downgoing baseband signal, then separate after the digital signal digital to analog conversion behind the frame to handle and then be transferred to base station system by optical fiber or category-5 cable by baseband signal processing module.
2, a kind of digital covering method according to claim 1 is characterized in that, after the digital signal of the framing that described step D obtains step C is transferred to capping unit by optical fiber or category-5 cable, is divided into following steps,
D1, capping unit receive the digital signal of this framing, and the digital signal of transmitting described framing is to the signal extraction module;
D2, signal extraction module are finished the frame of separating of data according to the frame structure of definition under the assistance of monitoring module;
D3, separate respective data transfer behind the frame, convert the analog if signal of certain bandwidth to the DAC module;
D4, the analog if signal frequency up-converted of above-mentioned certain bandwidth is become radiofrequency signal, and radiofrequency signal is delivered to radiofrequency emitting module;
D5, radiofrequency emitting module amplify the radiofrequency signal that obtains among the D4 as required, and launch this radiofrequency signal by antenna, finish signal and cover.
3, a kind of digital covering method according to claim 1 is characterized in that, described step e is divided into following steps,
E1, radio frequency reception antenna receive the radiofrequency signal that the user sends;
E2, the above-mentioned radiofrequency signal of transmission are to Receiver Module, and Receiver Module is adjusted the size of up radiofrequency signal power as required, and this radiofrequency signal frequency down-converts is become the analog if signal of certain bandwidth;
The analog if signal of E3, the above-mentioned certain bandwidth of transmission converts digital signal and the digital signal that obtains of transmission to the signal insert module to the ADC module;
E4, signal insert module are finished framing, the packing of digital signal according to the frame structure of definition under the assistance of monitoring module;
Digital signal after E5, framing, the packing to the coffret module, is carried out further work step through entering after the signal processing according to certain slot transmission.
4, according to claim 1 or 2 or 3 described a kind of digital covering methods, it is characterized in that the frame structure of described definition is followed successively by synchronization slot, signalling time slot, GSM signal, TD-SCDMA signal, WCDMA signal, other standard signal time slot and reserved time slots; Analog signal between the analog if signal of described certain bandwidth refers to from 30M to 200M; Described certain time slot refers to the synchro system according to described frame structure.
5, a kind of digital covering method according to claim 4 is characterized in that, in the described steps A, receives the downstream signal from base station system, receives by optical fiber or cable connected mode with by spatial coupling.
6, according to the arbitrary described a kind of digital covering method of claim 5, it is characterized in that described downstream signal type comprises GSM, CDMA, CDMA2000, WCDMA and TD-SCDMA signal, the radiofrequency signal that is the above-mentioned type is or/and baseband signal; Described upward signal type comprises GSM, CDMA, CDMA2000, WCDMA and TD-SCDMA signal.
7, a kind of digital covering system, comprise access unit and capping unit, it is characterized in that described access unit comprises access module, ADC module, baseband signal processing module, data combination module, coffret module, data separating module, DAC module, output module, monitoring module and power module; Wherein access module, ADC module, data combination module, coffret module are connected in series according to the order of sequence successively and form down link, and coffret module, separation module, DAC module, output module are connected in series according to the order of sequence successively and form up link; Simultaneously access module also by baseband signal processing module be connected with the data combination module, output module also is connected with the data separating module by baseband signal processing module, monitoring module connects data composite module and data separating module simultaneously, and power module is responsible for powering to access unit;
Described capping unit comprises coffret module, signal extraction module, DAC module, ifd module, radiofrequency emitting module, antenna, Receiver Module, ADC module, signal insert module, monitoring module and power-supply system, wherein the coffret module is connected to signal extraction module and signal insert module, and signal extraction module, DAC module, ifd module, radiofrequency emitting module and antenna are connected in series the formation down link in regular turn; Antenna, Receiver Module, ifd module, ADC module, signal insert module are connected in series the formation up link in regular turn simultaneously, and monitoring module is connected with the signal insert module with the signal extraction module simultaneously, and power-supply system is responsible for powering to capping unit;
Signal transmission between described access unit and the capping unit is passed through Optical Fiber Transmission by fiber optical transceiver, or is transmitted by category-5 cable by the ethernet network interface module.
8, a kind of digital covering system according to claim 7 is characterized in that, in the described access unit, access module, ADC module, DAC module and output module are the board plug type overall structure according to the different designs of signaling mode.
According to claim 7 or 8 described a kind of digital covering systems, it is characterized in that 9, in the described capping unit, DAC module, radiofrequency emitting module, Receiver Module and ADC module are the board plug type overall structure according to the different designs of signaling mode.
10, a kind of digital covering system according to claim 9 is characterized in that, the capping unit of described digital covering system is one or more.
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Cited By (21)
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| CN109525297A (en) * | 2018-10-18 | 2019-03-26 | 张馨月 | Realize repeater and the air-conditioning system of indoor radio signal covering |
| CN109442684A (en) * | 2018-10-18 | 2019-03-08 | 张馨月 | Realize the wireless repeater and air-conditioning system of indoor radio signal covering |
| CN109618412A (en) * | 2019-01-23 | 2019-04-12 | 广州开信通讯系统有限公司 | New digital optical fiber distribution system towards 5G and the method that capacity scheduling is carried out to downlink, uplink using the system |
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| WO2021129637A1 (en) * | 2019-12-23 | 2021-07-01 | 京信网络系统股份有限公司 | Indoor distribution system |
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| CN111031288A (en) * | 2019-12-24 | 2020-04-17 | 中国兵器装备集团自动化研究所 | Real-time video acquisition system and method based on wireless transmission |
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| CN113260096B (en) * | 2021-04-30 | 2022-10-28 | 上海守正通信技术有限公司 | 4G/5G dual-mode distributed base station radio frequency unit system architecture and signal processing method |
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