CN102104416A - Digital repeater and downlink signal processing method thereof - Google Patents
Digital repeater and downlink signal processing method thereof Download PDFInfo
- Publication number
- CN102104416A CN102104416A CN2010105924188A CN201010592418A CN102104416A CN 102104416 A CN102104416 A CN 102104416A CN 2010105924188 A CN2010105924188 A CN 2010105924188A CN 201010592418 A CN201010592418 A CN 201010592418A CN 102104416 A CN102104416 A CN 102104416A
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- base station
- pseudo
- pilot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Transceivers (AREA)
Abstract
The invention discloses a digital repeater and a downlink signal processing method thereof. The method comprises the following steps of: S1, receiving a downlink signal transmitted by a base station and separating a downlink radio-frequency signal from the downlink signal; S2, detecting the downlink radio-frequency signal and extracting a base station signal of a base station with highest signal intensity; S3, generating a pseudo-pilot signal and a pseudo-synchronous signal, wherein the pseudo-pilot signal and the pseudo-synchronous signal are respectively the same as a corresponding pseudo-pilot signal and a corresponding pseudo-synchronous signal in the extracted base station signal; S4,combining the pseudo-pilot signal and the pseudo-synchronous signal with the downlink radio-frequency signal to form a selectively amplified downlink radio-frequency signal; and S5, processing the selectively amplified downlink radio-frequency signal and transmitting a processed downlink signal to a mobile terminal. The method reduces pilot pollution, eliminates a self-excitation loop, makes engineering installation and debugging become simpler, and also solves the problem of low call completion rate and handoff drop call.
Description
Technical field
The present invention relates to the radio repeater system design field, relate in particular to a kind of digital high-frequency amplification station and downlink signal processing method thereof.
Background technology
Along with the professional rapid growth of mobile communication, there is active demand in operator to the lifting of brand effect separately, and the corresponding network quality requirement is also improving.At present construction project expansion just like a raging fire such as each underground shelter, road covering.The repeater still has unlimited potentiality as effectively extending network coverage means.For example, can adopt the repeater to solve in the city that high floor base station signal is poor, the mobile phone percent of call lost high and switch problems such as frequently causing call drop during conversation.At the beginning of the nineties, digital base stations technology such as GSM, CDMA are developed into from the original base station that simulates in the base station, but owing to the reasons such as technical strength of repeater producer, the repeater is not also broken through and simulated amplifying technique, is in lower technical merit.
Traditional repeater comprises that one two-wayly simulates amplifier, directly amplify radiofrequency signal is simple, on be about to send to the base station after mobile phone signal amplifies, be about to down send to mobile phone after the base station signal amplification.As shown in Figure 1: at down direction, the antenna 1 (donor antenna) of repeater receives the downstream signal of base station, amplifies through descending amplifying circuit, and the signal after the amplification sends to mobile phone by antenna 2 (cover antenna); At up direction, the antenna 2 (cover antenna) of repeater receives the upward signal of mobile phone, amplifies through up amplifying circuit, and the signal after the amplification sends to the base station through antenna 1 (donor antenna).
Forwarding is directly amplified to all base station signals in traditional repeater, makes an uproar in the end of increased aerial frequency pollution and pilot pollution, having raised the base station; Because the receive frequency of antenna 1 is identical with the transmission frequency of antenna 2, as shown in Figure 1, signal after descending amplifier amplifies, send through antenna 2 (cover antenna), the aerial signal that sends is received by antenna 1 (donor antenna) again, amplifies through descending amplifier again, send from antenna 2 (cover antenna) again after the amplification, so circulation is amplified and is formed self-excitation, and such self-excitation is called the outer shroud self-excitation, and goading into action certainly significantly increases signal noise; For fear of self-excitation, the general isolation technology that adopts directional antenna or body of wall to stop carried out close benefit when fortification were installed, and brought a lot of inconvenience for project installation and debugging.
Summary of the invention
The technical problem to be solved in the present invention is that project installation and the big defective of debugging difficulty at the frequency pollution that exists in the prior art, pilot pollution, self-excitation problem and initiation thus provide a kind of digital high-frequency amplification station and downlink signal processing method thereof.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of digital high-frequency amplification station is provided, and it is arranged between base station and the portable terminal, comprising:
Donor antenna is used to receive the downstream signal that base station comes and sends described downstream signal to alms giver and holds duplexer, or is used to launch the upward signal that described alms giver holds duplexer to send and gives described base station;
The alms giver holds duplexer, is used for isolating downlink radio-frequency signal from the described downstream signal that receives, or is used to receive up radiofrequency signal and handles and export described upward signal;
Control circuit holds duplexer to link to each other with described capped end duplexer with described alms giver, is used to detect described downlink radio-frequency signal and therefrom extracts the base station signal at the strong basis station of signal and be used for to pilot beacon and pseudo-synchronous circuit sending controling instruction;
Pilot beacon and pseudo-synchronous circuit, hold duplexer, described capped end duplexer to link to each other with described alms giver with described control circuit, be used for generating dummy pilot signal and pseudo-synchronous signal according to the control command of described control circuit, described dummy pilot signal and pseudo-synchronous signal are identical with corresponding pilot signal and synchronizing signal in the base station signal that is extracted respectively;
Mixer holds duplexer, described capped end duplexer and described pilot beacon and pseudo-synchronous circuit to link to each other with described alms giver, is used for described dummy pilot signal and described pseudo-synchronous signal and described downlink radio-frequency signal are merged into the downlink radio-frequency signal that selectivity is amplified;
Cover antenna is used for upward signal that mobile terminal receive emission comes and sends described upward signal to the capped end duplexer, or is used to launch the downstream signal that described capped end duplexer sends and gives described portable terminal;
The capped end duplexer is used for isolating up radiofrequency signal from the described upward signal that receives, or is used to receive downlink radio-frequency signal and handles and export described downstream signal.
In the digital high-frequency amplification station of the present invention, described control circuit further comprises:
Detecting unit is used to detect the base station signal at described downlink radio-frequency signal and the strong basis station of select-out signal;
Decoding unit, be used to decode described base station signal and extract the pilot channel code of described base station signal and the synchronizing channel sign indicating number to obtain pilot signal and synchronizing signal.
In the digital high-frequency amplification station of the present invention, described mixer further comprises:
Down-converter unit is used for described downlink radio-frequency signal is down-converted to baseband signal;
Synthesis unit is used for incorporating described dummy pilot signal and described pseudo-synchronous signal the time slot of the corresponding pilot tone of described baseband signal into to generate the baseband signal that selectivity is amplified;
The up-conversion unit is used for the baseband signal that described selectivity is amplified is up-converted to the downlink radio-frequency signal that described selectivity is amplified.
In the digital high-frequency amplification station of the present invention, the frequency of the downstream signal of described cover antenna emission is different with the frequency of the downstream signal that described donor antenna receives.
In the digital high-frequency amplification station of the present invention, described mixer also comprises the digital filter circuit that is used for described downstream signal is carried out Filtering Processing.
The present invention also provides a kind of downlink signal processing method, may further comprise the steps:
The downstream signal of S1, reception base station is also therefrom isolated downlink radio-frequency signal;
S2, detect described downlink radio-frequency signal and therefrom extract the base station signal at the strong basis station of signal;
S3, generate dummy pilot signal and pseudo-synchronous signal, described dummy pilot signal and pseudo-synchronous signal are identical with corresponding pilot signal and synchronizing signal in the base station signal that is extracted respectively;
S4, described dummy pilot signal and described pseudo-synchronous signal and described downlink radio-frequency signal are merged into the downlink radio-frequency signal that selectivity is amplified;
The downstream signal that the concurrent warp let-off of downlink radio-frequency signal that S5, the described selectivity of processing are amplified is handled is given portable terminal.
In the downlink signal processing method of the present invention, step S2 further comprises:
S21, detect the base station signal at the strong basis station of described downlink radio-frequency signal and select-out signal;
S22, the described base station signal of decoding and extract the pilot channel code of described base station signal and the synchronizing channel sign indicating number to obtain pilot signal and synchronizing signal.
In the downlink signal processing method of the present invention, step S4 further comprises:
S41, described downlink radio-frequency signal is down-converted to baseband signal;
S42, incorporate described dummy pilot signal and described pseudo-synchronous signal the time slot of the corresponding pilot tone of described baseband signal into to generate the baseband signal that selectivity is amplified;
S43, the baseband signal that described selectivity is amplified up-convert to the downlink radio-frequency signal that described selectivity is amplified.
In the downlink signal processing method of the present invention, the frequency of described treated downstream signal is different with the frequency of the described downstream signal that receives from the base station.
In the downlink signal processing method of the present invention, also comprise described downstream signal is carried out Filtering Processing.
The beneficial effect of a kind of digital high-frequency amplification station of the present invention and downlink signal processing method thereof is: owing to be not that the base station signal that receives is all amplified forwarding, but produce useful dummy pilot signal and pseudo-synchronous signal superposition in downlink, and dummy pilot signal is identical with chosen former base station signal with pseudo-synchronous signal, pilot pollution and frequency are polluted and just are lowered to minimum limit, making an uproar in the end that does not increase the base station, makes this intelligent digital station can be installed in the city; Since not the base station signal that receives to be carried out simple direct amplification transmit, but adopt the digital technology of regeneration pilot tone and shared channel signal, the loop of the amplification that do not circulate, the no longer self-excitation of intelligent digital station, noise is little; Intelligent digital station no-self excitation, interference base station not, project installation and debugging are just very convenient, can accomplish plug and play; Owing to only strengthened the pilot signal and the synchronizing signal of selection of base stations, other signal of base station does not change, and mobile phone has had clear and definite primary pilot signal, has solved the not high problem of call completion ratio in the skyscraper, has solved the call drop problem that frequent switching causes simultaneously yet.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of prior art repeater;
Fig. 2 is the structural representation of digital high-frequency amplification station according to an embodiment of the invention;
Fig. 3 is the structural representation of digital high-frequency amplification station in accordance with another embodiment of the present invention;
Fig. 4 is the flow chart of downlink signal processing method according to an embodiment of the invention.
Embodiment
Fig. 2 is the structural representation of digital high-frequency amplification station according to an embodiment of the invention.In the present embodiment, digital high-frequency amplification station 200 is arranged between base station and the portable terminal, and digital high-frequency amplification station 200 comprises up link and down link.Up link comprises that cover antenna 270, capped end duplexer 260, alms giver hold duplexer 220 and donor antenna 210, and down link comprises that donor antenna 210, alms giver hold duplexer 220, control circuit 230, pilot beacon and pseudo-synchronous circuit 240, mixer 250, capped end duplexer 260 and cover antenna 270.
In up link, donor antenna 210 holds duplexer 220 to be connected with cover antenna 270 with capped end duplexer 260 by the alms giver successively.Cover antenna 270 is used for the next upward signal of mobile terminal receive emission and sends this upward signal to capped end duplexer 260.Capped end duplexer 260 is used for obtaining up radiofrequency signal from the upward signal filtering unwanted signal that receives.The alms giver holds duplexer 220 to be used for receiving up radiofrequency signal from capped end duplexer 260 and handles and export this upward signal.Donor antenna 210 is used to launch the upward signal that the alms giver holds duplexer 260 to send and gives the base station.In various embodiment of the present invention, up link also comprises various amplifiers such as power amplification circuit, holds between duplexer 220 and the capped end duplexer 260 the alms giver, is used to amplify up radiofrequency signal.Should be understood that these amplifier technology belong to prior art,, amplifier is not shown among Fig. 2, also no longer be described in detail herein in order to simplify accompanying drawing and explanation.
In the course of work of up link, capped end duplexer 260 filtering unwanted signal from the upward signal that cover antenna 270 receives obtains up radiofrequency signal, this up radiofrequency signal sends the alms giver to and holds duplexer 220 after amplifier amplifies, be transmitted to the base station by donor antenna 210 after the alms giver holds duplexer 220 to be treated as upward signal.
In down link, the alms giver holds duplexer 220 to be connected with capped end duplexer 260 by mixer 250 with pilot beacon and pseudo-synchronous circuit 240, and control circuit 230 holds duplexer 220, pilot beacon and pseudo-synchronous circuit 240 and capped end duplexer 260 to be connected with the alms giver respectively.
The alms giver holds duplexer 220, can be used for obtaining downlink radio-frequency signal from the downstream signal filtering unwanted signal that donor antenna 210 receives.
Pilot beacon and pseudo-synchronous circuit 240 can be used for generating dummy pilot signal and pseudo-synchronous signal according to the control command of control circuit 230.Pilot signal in the base station signal at the strong basis station of the signal of the dummy pilot signal that pilot beacon and pseudo-synchronous circuit 240 generates and control circuit 230 extractions is identical.Synchronizing signal in the base station signal at the strong basis station of the signal that the pseudo-synchronous signal that pilot beacon and pseudo-synchronous circuit 240 generates and control circuit 230 are extracted is identical.Pilot beacon and pseudo-synchronous circuit 240 can also be sent to mixer 250 with dummy pilot signal and the pseudo-synchronous signal that generates.In one embodiment of the invention, pilot beacon and pseudo-synchronous circuit 240 can be special signal generators, be used for generating corresponding dummy pilot signal and pseudo-synchronous signal according to the control command of control circuit 230, wherein, can comprise signal parameters such as frequency, amplitude, phase place or duty ratio in the control command.In other embodiments of the invention, pilot beacon and pseudo-synchronous circuit 240 can also be simple transmission circuits, and the pilot signal and the corresponding synchronizing signal that are used for control circuit 230 is extracted send mixer 250 to.
Capped end duplexer 260 is used for handling with the output downstream signal from the downlink radio-frequency signal of mixer 250 receiver selectivities amplification and to it.
In the course of work of down link, donor antenna 210 receives the next downstream signal of base station and sends this downstream signal to alms giver holds duplexer 220.The alms giver holds duplexer 220 filtering unwanted signal from the downstream signal that donor antenna 210 receives to obtain downlink radio-frequency signal.Control circuit 230 detects these downlink radio-frequency signals and therefrom extracts the base station signal at the strong basis station of signal, and control circuit 230 makes pilot beacon and pseudo-synchronous circuit 240 generate dummy pilot signal and pseudo-synchronous signal according to the control command of control circuit 230 to pilot beacon and pseudo-synchronous circuit 240 sending controling instructions then.Pilot signal in the base station signal at the strong basis station of the signal of the dummy pilot signal that pilot beacon and pseudo-synchronous circuit 240 generates and control circuit 230 extractions is identical.Synchronizing signal in the base station signal at the strong basis station of the signal that the pseudo-synchronous signal that pilot beacon and pseudo-synchronous circuit 240 generates and control circuit 230 are extracted is identical.Mixer 250 receives dummy pilot signal and the pseudo-synchronous signal that generates from pilot beacon and pseudo-synchronous circuit 240, and holds duplexer 220 to receive downlink radio-frequency signal from the alms giver.Next, mixer 250 is merged into the downlink radio-frequency signal that selectivity is amplified with dummy pilot signal and pseudo-synchronous signal and downlink radio-frequency signal.Capped end duplexer 260 is handled with the output downstream signal from the downlink radio-frequency signal of mixer 250 receiver selectivities amplification and to it.At last, cover antenna 270 is transmitted to portable terminal with this downstream signal.
Fig. 3 is the structural representation of digital high-frequency amplification station in accordance with another embodiment of the present invention.In the present embodiment, digital high-frequency amplification station 300 is arranged between base station and the portable terminal, and digital high-frequency amplification station 300 comprises up link and down link.Up link shown in up link and Fig. 2 is similar, no longer is described herein.Down link comprises that donor antenna 210, alms giver hold duplexer 220, control circuit 230, pilot beacon and pseudo-synchronous circuit 240, mixer 250, capped end duplexer 260 and cover antenna 270.Wherein, control circuit 230 further comprises detecting unit 231, decoding unit 232; Mixer 250 further comprises up-conversion unit 251, synthesis unit 252 and up-conversion unit 253.In other embodiments of the invention, mixer 250 also comprises digital filter circuit 254.Notice that donor antenna 210, alms giver hold duplexer 220, pilot beacon and pseudo-synchronous circuit 240, capped end duplexer 260 and cover antenna 270 to describe in detail in conjunction with Fig. 2.
Detecting unit 231 can be used to detect from the alms giver and hold the downlink radio-frequency signal that duplexer 220 sends and therefrom extract the base station signal at the strong basis station of signal.During detection, the intensity that can only detect each base station pilot signals is to judge the intensity of base station signal, because pilot signal is the Direct Sequence Spread Spectrum Signal that the base station is launched non-modulated continuously, it makes mobile phone can obtain the forward direction CDMA channel time limit, the correlation demodulation phase reference can also be provided, and, and mobile phone can be determined when switch for each base station provides signal strength signal intensity relatively.
Decoding unit 232, the base station signal at the strong basis station of the signal that the detecting unit 231 that can be used for decoding extracts and extract the pilot channel code of this base station signal and the synchronizing channel sign indicating number to obtain pilot signal and synchronizing signal.In one embodiment of the invention, pilot channel code can be the PN sign indicating number, is used for distinguishing base station and user.Each PN sign indicating number is loaded with corresponding synchronizing signal corresponding to a time slot of base station in the channel of this time slot correspondence.The decoding unit 232 PN sign indicating number sequence of can decoding finds the synchronizing signal of corresponding time slot according to decoded result.Then, pilot signal that decoding unit 232 can obtain decoding and synchronizing signal send pilot beacon and pseudo-synchronous circuit 240 to, perhaps send to pilot beacon and pseudo-synchronous circuit 240 by control circuit 230 according to pilot signal and the instruction of synchronizing signal generation control corresponding that decoding obtains.
Down-converter unit 251, the downlink radio-frequency signal that can be used for holding duplexer 220 to receive from the alms giver down-converts to baseband signal.In one embodiment of the invention, down-converter unit 251 can hold duplexer 220 to receive downlink radio-frequency signal from the alms giver, and the local oscillation signal of this downlink radio-frequency signal and a characteristic frequency F1 is carried out mixing obtain intermediate-freuqncy signal, again intermediate-freuqncy signal is carried out down-converted and obtain the Analog Baseband i/q signal.Down-converter unit 251 can also send above-mentioned Analog Baseband i/q signal to synthesis unit 252 so that carry out the selectivity processing and amplifying.
Up-conversion unit 253 can be used for up-converting to the downlink radio-frequency signal that selectivity is amplified from the baseband signal of synthesis unit 252 receiver selectivities amplification and with it.In one embodiment of the invention, up-conversion unit 253 can receive the Analog Baseband i/q signal and with its up-conversion intermediate-freuqncy signal, will produce the downlink radio-frequency signal that selectivity is amplified after the local oscillation signal mixing of this intermediate-freuqncy signal and the second characteristic frequency F2 again from synthesis unit 252.
In the course of work of down link, donor antenna 210 receives the next downstream signal of base station and sends this downstream signal to alms giver holds duplexer 220.The alms giver holds duplexer 220 filtering unwanted signal from the downstream signal that donor antenna 210 receives to obtain downlink radio-frequency signal.In another embodiment of the present invention, the alms giver holds the noise of all right other frequency band of filtering of filter in the duplexer 220.
Then, detecting unit 231 detects from the alms giver and holds the downlink radio-frequency signal that duplexer 220 sends and therefrom extract the base station signal at the strong basis station of signal.The base station signal at the strong basis station of the signal that extracts in the decoding unit 232 decoding detecting units 231 and extract the pilot channel code of this base station signal and the synchronizing channel sign indicating number to obtain pilot signal and synchronizing signal.In one embodiment of the invention, the decoding unit 232 PN sign indicating number sequence of can decoding finds the synchronizing signal of corresponding time slot according to decoded result.Then, pilot signal that decoding unit 232 can obtain decoding and synchronizing signal send pilot beacon and pseudo-synchronous circuit 240 to, perhaps send to pilot beacon and pseudo-synchronous circuit 240 by control circuit 230 according to pilot signal and the instruction of synchronizing signal generation control corresponding that decoding obtains.Pilot beacon and pseudo-synchronous circuit 240 generate dummy pilot signal and pseudo-synchronous signal according to the control command of control circuit 230.Pilot signal in the base station signal at the strong basis station of the signal of the dummy pilot signal that pilot beacon and pseudo-synchronous circuit 240 generates and control circuit 230 extractions is identical.Synchronizing signal in the base station signal at the strong basis station of the signal that the pseudo-synchronous signal that pilot beacon and pseudo-synchronous circuit 240 generates and control circuit 230 are extracted is identical.
Next, down-converter unit 251 will down-convert to baseband signal from the downlink radio-frequency signal that the alms giver holds duplexer 220 to receive.In another embodiment of the present invention, can also carry out Filtering Processing so that filtering noise by 254 pairs of these baseband signals of digital filter circuit.Synthesis unit 252 receives dummy pilot signal and pseudo-synchronous signal and receives the Analog Baseband i/q signals from down-converter unit 251 from pilot beacon and pseudo-synchronous circuit 240.Then, the Analog Baseband i/q signal that the time slot that synthesis unit 252 is incorporated the dummy pilot signal and the pseudo-synchronous signal of pilot beacon and 240 generations of pseudo-synchronous circuit into Analog Baseband i/q signal corresponding pilot tone amplifies with the generation selectivity, in the Analog Baseband i/q signal that this selectivity is amplified, only amplify the base station signal at the strong basis station of signal, promptly strengthened dominant pilot.After finishing the signal stack, the Analog Baseband i/q signal that synthesis unit 252 amplifies selectivity sends up-conversion unit 253 to.Up-conversion unit 253 up-converts to downlink radio-frequency signal of selectivity amplification so that send from the baseband signal of synthesis unit 252 receiver selectivities amplification and with it.In another embodiment of the present invention, can also carry out Filtering Processing so that filtering noise by 254 pairs of these downlink radio-frequency signals of digital filter circuit.
Capped end duplexer 260 is handled with the output downstream signal from the downlink radio-frequency signal of up-conversion unit 253 receiver selectivities amplification and to it.In another embodiment of the present invention, the noise in all right filtering downstream signal of the filter in the capped end duplexer 260.At last, by cover antenna 270 treated downstream signal is transmitted to portable terminal.The frequency of Fa She downstream signal is different with the frequency of the downstream signal that receives by donor antenna 210 herein.
Fig. 4 is the flow chart of downlink signal processing method according to an embodiment of the invention.In the present embodiment, a kind of downlink signal processing method that is used for the digital high-frequency amplification station shown in Fig. 2 or 3 starts from step S1.In step S1, receive the downstream signal of base station and therefrom isolate downlink radio-frequency signal.In one embodiment of the invention, receive downstream signal that base station comes and from this downstream signal the filtering unwanted signal obtain downlink radio-frequency signal.The noise that can also comprise in another embodiment of the present invention, other frequency band of filtering.
In step S2, detect downlink radio-frequency signal and therefrom extract the base station signal at the strong basis station of signal.In one embodiment of the invention, detect the base station signal at the strong basis station of downlink radio-frequency signal and select-out signal, this base station signal and extract the pilot channel code and the synchronizing channel sign indicating number of this base station signal of decoding then is to obtain pilot signal and synchronizing signal.In another embodiment of the present invention, detect the base station signal at the strong basis station of downlink radio-frequency signal and select-out signal, the PN sign indicating number sequence of this base station signal of decoding then finds the synchronizing signal of corresponding time slot according to decoded result.In another embodiment of the present invention, can also generate the control corresponding instruction, can comprise in this control command that frequency, amplitude, phase place or duty ratio etc. are used to generate the signal parameter of corresponding signal according to pilot signal and the synchronizing signal that decoding obtains.
In step S3, generate dummy pilot signal and pseudo-synchronous signal, this dummy pilot signal and pseudo-synchronous signal are identical with corresponding pilot signal and synchronizing signal in the base station signal that is extracted respectively.In one embodiment of the invention, can generate corresponding dummy pilot signal and pseudo-synchronous signal, wherein, can comprise signal parameters such as frequency, amplitude, phase place or duty ratio in the control command according to above-mentioned control command.In other embodiments of the invention, can also directly transmit pilot signal and the corresponding synchronizing signal of extracting.
In step S4, dummy pilot signal and pseudo-synchronous signal and downlink radio-frequency signal are merged into the downlink radio-frequency signal that selectivity is amplified.In one embodiment of the invention, downlink radio-frequency signal is down-converted to baseband signal, incorporate dummy pilot signal and pseudo-synchronous signal the baseband signal of the time slot of the corresponding pilot tone of baseband signal with the amplification of generation selectivity into again, the baseband signal that this selectivity is amplified up-converts to the downlink radio-frequency signal that selectivity is amplified at last.In another embodiment of the present invention, downlink radio-frequency signal can be down-converted to the Analog Baseband i/q signal, this Analog Baseband i/q signal is carried out Filtering Processing so that filtering noise, incorporate the dummy pilot signal and the pseudo-synchronous signal that generate the time slot of Analog Baseband i/q signal correspondence pilot tone into to generate the Analog Baseband i/q signal that selectivity is amplified then, in the Analog Baseband i/q signal that this selectivity is amplified, only amplified the base station signal at the strong basis station of signal, promptly strengthened dominant pilot, after finishing the signal stack, the Analog Baseband i/q signal that selectivity is amplified up-converts to the downlink radio-frequency signal that selectivity is amplified, and can also carry out Filtering Processing so that filtering noise to this downlink radio-frequency signal.
In step S5, the downstream signal that the concurrent warp let-off of the downlink radio-frequency signal of processing selecting amplification is handled is given portable terminal.In one embodiment of the invention, the downlink radio-frequency signal that selectivity is amplified is handled and is obtained the downstream signal that is used to send and launch.The noise that can also comprise in another embodiment of the present invention, other frequency band of filtering.Among the various embodiment of the present invention again, the frequency of the downstream signal that receives among the frequency of Fa She downstream signal and the step S1 is different herein.
Among the present invention, use digital technology to produce dummy pilot signal and pseudo-synchronous signal, the dummy pilot signal that produces is identical with chosen former base station signal with pseudo-synchronous signal, the signal that produces is added in the down link, with pilot signal and the synchronizing signal that strengthens this base station, realize amplification to useful signal.And do not have chosen signal of base station will can not be exaggerated forwarding, and not only realized the pilot tone enhancement function, also pilot pollution and frequency pollution are reduced to minimum limit, and do not increase the end bath of base station.The present invention has overcome the The pilot pollution problem of skyscraper, makes this digital high-frequency amplification station can be installed in the city.
In addition, the present invention directly amplifies the simple of signal, but adopts the digital technology of regeneration pilot tone and shared channel signal, has cancelled the loop that circulation is amplified, and does not have free-running circuit, has exempted self-excitation, has reduced noise.And the present invention is by digital filtering and shift frequency, guarantees the isolation that up-downgoing is very high on the one hand, on the other hand uplink and downlink works on different frequency, thereby avoided self-excitation.
Because digital high-frequency amplification station no-self excitation provided by the present invention, interference base station not, project installation and debugging are just very convenient, can accomplish plug and play.The installation that is embodied in antenna is very simple, and the debugging of equipment is also very easy, has also reduced cost simultaneously.
In addition, because the present invention has only strengthened the pilot signal and the synchronizing signal of selection of base stations, other signal of base station does not change, and mobile phone has had clear and definite primary pilot signal, solve the not high problem of call completion ratio in the skyscraper, also solved the call drop problem that frequent switching causes simultaneously.
The present invention can be applied in the communication system systems such as GSM, CDMA, DCS, JDC, TD-SCDMA, WCDMA, CDMA2000, forms the digital direct discharging station of different communication standard.
Though the present invention describes by specific embodiment, it will be appreciated by those skilled in the art that, without departing from the present invention, can also carry out various conversion and be equal to alternative the present invention.In addition, at particular condition or material, can make various modifications to the present invention, and not depart from the scope of the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should comprise the whole execution modes that fall in the claim scope of the present invention.
Claims (10)
1. digital high-frequency amplification station, it is arranged between base station and the portable terminal, it is characterized in that, comprising:
Donor antenna is used to receive the downstream signal that base station comes and sends described downstream signal to alms giver and holds duplexer, or is used to launch the upward signal that described alms giver holds duplexer to send and gives described base station;
The alms giver holds duplexer, is used for isolating downlink radio-frequency signal from the described downstream signal that receives, or is used to receive up radiofrequency signal and handles and export described upward signal;
Control circuit holds duplexer to link to each other with described capped end duplexer with described alms giver, is used to detect described downlink radio-frequency signal and therefrom extracts the base station signal at the strong basis station of signal and be used for to pilot beacon and pseudo-synchronous circuit sending controling instruction;
Pilot beacon and pseudo-synchronous circuit, hold duplexer, described capped end duplexer to link to each other with described alms giver with described control circuit, be used for generating dummy pilot signal and pseudo-synchronous signal according to the control command of described control circuit, described dummy pilot signal and pseudo-synchronous signal are identical with corresponding pilot signal and synchronizing signal in the base station signal that is extracted respectively;
Mixer holds duplexer, described capped end duplexer and described pilot beacon and pseudo-synchronous circuit to link to each other with described alms giver, is used for described dummy pilot signal and described pseudo-synchronous signal and described downlink radio-frequency signal are merged into the downlink radio-frequency signal that selectivity is amplified;
Cover antenna is used for upward signal that mobile terminal receive emission comes and sends described upward signal to the capped end duplexer, or is used to launch the downstream signal that described capped end duplexer sends and gives described portable terminal;
The capped end duplexer is used for isolating up radiofrequency signal from the described upward signal that receives, or is used to receive downlink radio-frequency signal and handles and export described downstream signal.
2. digital high-frequency amplification station according to claim 1 is characterized in that, described control circuit further comprises:
Detecting unit is used to detect the base station signal at described downlink radio-frequency signal and the strong basis station of select-out signal;
Decoding unit, be used to decode described base station signal and extract the pilot channel code of described base station signal and the synchronizing channel sign indicating number to obtain pilot signal and synchronizing signal.
3. digital high-frequency amplification station according to claim 1 is characterized in that, described mixer further comprises:
Down-converter unit is used for described downlink radio-frequency signal is down-converted to baseband signal;
Synthesis unit is used for incorporating described dummy pilot signal and described pseudo-synchronous signal the time slot of the corresponding pilot tone of described baseband signal into to generate the baseband signal that selectivity is amplified;
The up-conversion unit is used for the baseband signal that described selectivity is amplified is up-converted to the downlink radio-frequency signal that described selectivity is amplified.
4. digital high-frequency amplification station according to claim 1 is characterized in that, the frequency of the downstream signal of described cover antenna emission is different with the frequency of the downstream signal that described donor antenna receives.
5. digital high-frequency amplification station according to claim 1 is characterized in that described mixer also comprises the digital filter circuit that is used for described downstream signal is carried out Filtering Processing.
6. a downlink signal processing method is characterized in that, may further comprise the steps:
The downstream signal of S1, reception base station is also therefrom isolated downlink radio-frequency signal;
S2, detect described downlink radio-frequency signal and therefrom extract the base station signal at the strong basis station of signal;
S3, generate dummy pilot signal and pseudo-synchronous signal, described dummy pilot signal and pseudo-synchronous signal are identical with corresponding pilot signal and synchronizing signal in the base station signal that is extracted respectively;
S4, described dummy pilot signal and described pseudo-synchronous signal and described downlink radio-frequency signal are merged into the downlink radio-frequency signal that selectivity is amplified;
The downstream signal that the concurrent warp let-off of downlink radio-frequency signal that S5, the described selectivity of processing are amplified is handled is given portable terminal.
7. downlink signal processing method according to claim 6 is characterized in that step S2 further comprises:
S21, detect the base station signal at the strong basis station of described downlink radio-frequency signal and select-out signal;
S22, the described base station signal of decoding and extract the pilot channel code of described base station signal and the synchronizing channel sign indicating number to obtain pilot signal and synchronizing signal.
8. downlink signal processing method according to claim 6 is characterized in that step S4 further comprises:
S41, described downlink radio-frequency signal is down-converted to baseband signal;
S42, incorporate described dummy pilot signal and described pseudo-synchronous signal the time slot of the corresponding pilot tone of described baseband signal into to generate the baseband signal that selectivity is amplified;
S43, the baseband signal that described selectivity is amplified up-convert to the downlink radio-frequency signal that described selectivity is amplified.
9. downlink signal processing method according to claim 6 is characterized in that, the frequency of described treated downstream signal is different with the frequency of the described downstream signal that receives from the base station.
10. digital downlink signal processing method according to claim 6 is characterized in that, also comprises described downstream signal is carried out Filtering Processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010592418.8A CN102104416B (en) | 2010-12-16 | 2010-12-16 | Digital repeater and downlink signal processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010592418.8A CN102104416B (en) | 2010-12-16 | 2010-12-16 | Digital repeater and downlink signal processing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102104416A true CN102104416A (en) | 2011-06-22 |
| CN102104416B CN102104416B (en) | 2014-05-21 |
Family
ID=44156974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010592418.8A Active CN102104416B (en) | 2010-12-16 | 2010-12-16 | Digital repeater and downlink signal processing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102104416B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034811A (en) * | 2019-05-31 | 2019-07-19 | 福建瑞波信息技术有限公司 | Mobile communication indoor signal enhancing device and its Enhancement Method |
| CN111181622A (en) * | 2020-01-03 | 2020-05-19 | 重庆邮电大学 | Configurable digital multimedia broadcasting micro wireless repeater |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101651498A (en) * | 2009-08-28 | 2010-02-17 | 深圳市云海通讯股份有限公司 | Repeater and method for removing pilot frequency pollution by same |
| CN101719782A (en) * | 2009-11-26 | 2010-06-02 | 三维通信股份有限公司 | td-scdma wireless repeater |
| US20100208776A1 (en) * | 2007-08-07 | 2010-08-19 | Electronic And Telecommunications Research Institute | Method for connecting base station and repeater for spatial division multiple access and repeating method thereof |
-
2010
- 2010-12-16 CN CN201010592418.8A patent/CN102104416B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100208776A1 (en) * | 2007-08-07 | 2010-08-19 | Electronic And Telecommunications Research Institute | Method for connecting base station and repeater for spatial division multiple access and repeating method thereof |
| CN101651498A (en) * | 2009-08-28 | 2010-02-17 | 深圳市云海通讯股份有限公司 | Repeater and method for removing pilot frequency pollution by same |
| CN101719782A (en) * | 2009-11-26 | 2010-06-02 | 三维通信股份有限公司 | td-scdma wireless repeater |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034811A (en) * | 2019-05-31 | 2019-07-19 | 福建瑞波信息技术有限公司 | Mobile communication indoor signal enhancing device and its Enhancement Method |
| CN111181622A (en) * | 2020-01-03 | 2020-05-19 | 重庆邮电大学 | Configurable digital multimedia broadcasting micro wireless repeater |
| CN111181622B (en) * | 2020-01-03 | 2021-10-26 | 重庆邮电大学 | Configurable digital multimedia broadcasting micro wireless repeater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102104416B (en) | 2014-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20190372530A1 (en) | Distributed antenna system architectures | |
| RU2387075C2 (en) | Additional honeycomb amplifier with small operating range | |
| EP1985056B1 (en) | Short range booster | |
| CN105471490B (en) | Repeater and signal processing method thereof | |
| CN112152643B (en) | Switching circuit of antenna and electronic equipment | |
| EP1711928A4 (en) | Short-range cellular booster | |
| CN103607254A (en) | System and method for shielding mobile phone signal by adoption of store-and-forward | |
| CN107888274B (en) | Mobile signal relay amplifier | |
| CN102271344B (en) | Method for enhancing transmission distance for frequency shift repeater in time division duplex relay transmission mode | |
| CN109104232B (en) | Wireless relay equipment and wireless communication system | |
| CN102104416B (en) | Digital repeater and downlink signal processing method thereof | |
| US20160112078A1 (en) | Terminal and power charching method thereof | |
| CN101651498B (en) | Repeater and method for removing pilot frequency pollution by same | |
| CN102946572A (en) | Wireless interphone signal transmission method based on transfer platform | |
| CN112770333B (en) | 5G NR wireless distributed frequency shift system and frequency shift method | |
| CN106411386B (en) | Full-band repeater | |
| KR20150133367A (en) | Wireless communication repeater for ship | |
| CN102118188A (en) | GSM (Global System for Mobile communications) repeater capable of obtaining corresponding frequency hopping frequency point by utilizing frequency locking | |
| CN201781489U (en) | Wireless repeater with function of eliminating feedback interference signals | |
| KR20140131780A (en) | Mobile terminal with repeat function and mehtod thereof | |
| KR100763485B1 (en) | Radio relay apparatus of cdma having a rejection function of pn pollution | |
| KR101514985B1 (en) | Energy dispersion consuming type hybrid radio communications repeater | |
| CN103973356A (en) | Receiving and transmitting multiplex circuit for TDD system wireless Pico repeater | |
| CN201966916U (en) | Frequency-shift repeater station system adopting time division duplex transmission manner | |
| KR102175384B1 (en) | Apparatus and method for half duplex wireless repeaters with wide coverage |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000, room 801, B, science and Technology Pioneer Park, Tian An Digital City, Guangdong, Shenzhen Patentee after: Shenzhen Hao Hua network Link Communications Inc Address before: 518000, room 801, B, science and Technology Pioneer Park, Tian An Digital City, Guangdong, Shenzhen Patentee before: Shenzhen Howah Network Communication Co., Ltd. |