CN104219020B - Processing method, system and the Remote Radio Unit of the I/Q data of Remote Radio Unit - Google Patents

Processing method, system and the Remote Radio Unit of the I/Q data of Remote Radio Unit Download PDF

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Publication number
CN104219020B
CN104219020B CN201310213736.2A CN201310213736A CN104219020B CN 104219020 B CN104219020 B CN 104219020B CN 201310213736 A CN201310213736 A CN 201310213736A CN 104219020 B CN104219020 B CN 104219020B
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carrier wave
road
carrier
data
signal
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CN104219020A (en
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成军平
�田宏
张天鹏
张志锋
刘彬
邵立群
李永国
王钢
白伟岐
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ZTE Corp
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ZTE Corp
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    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03CMODULATION
    • H03C3/00Angle modulation
    • H03C3/38Angle modulation by converting amplitude modulation to angle modulation
    • H03C3/40Angle modulation by converting amplitude modulation to angle modulation using two signal paths the outputs of which have a predetermined phase difference and at least one output being amplitude-modulated
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03CMODULATION
    • H03C2200/00Indexing scheme relating to details of modulators or modulation methods covered by H03C
    • H03C2200/0037Functional aspects of modulators
    • H03C2200/0058Quadrature arrangements

Abstract

The invention discloses a kind of processing methods of the I/Q data of Remote Radio Unit (RRU), it include: after RRU receives the I/Q data that baseband processing unit (BBU) is sent by dual carrier, parallel processing is carried out to the I/Q data of the dual carrier, by treated, dual carrier is modulated to radiofrequency signal, and exports to antenna end.The present invention further simultaneously discloses a kind of I/Q data processing system and Remote Radio Unit.Using technical solution of the present invention, the ability of active antenna transmission data is improved, is reduced costs.

Description

Processing method, system and the Remote Radio Unit of the I/Q data of Remote Radio Unit
Technical field
The present invention relates to the communication technologys more particularly to a kind of processing of the I/Q data of Remote Radio Unit in the communications field Method, system and Remote Radio Unit.
Background technique
As network frequency range, standard are more and more, the high-performance base station of multi-frequency multi-mode is supported --- active antenna is active Antenna system (AAS, Active Antenna System) is come into being.The active antenna industry direction completely new as one is A kind of new architecture of base station form, as shown in Figure 1, active antenna by the radio-frequency part diversity of base station to inner antenna, using multi-pass The radio frequency and antenna element in road cooperate, and realize spatial beams molding, complete the transmitting-receiving of radiofrequency signal.Active antenna is as new base Station rack is configured state, and baseband signal is similarly sent to active antenna list by baseband processing unit (BBU, Base Band Unit) Member;It is different from BBU+ Remote Radio Unit (RRU, Remote Radio frequency Unit) architectural form, active antenna will Transceiver channel is divided into antenna oscillator rank, and granularity is more careful.It is configured by the difference to AAE active antenna element, to realize The wave beam of practical communication networking flexibly controls and function such as multiple-input and multiple-output (MIMO, Multi Input Multi Output) Can, more flexible dynamic resource allocation and shared is realized, to reach the whole network best performance and lower fullnet networking cost Target.
Currently, transmitting link design schematic diagram general in communication system is as shown in Fig. 2, RRU receives the IQ that BBU is issued After data, Digital IF Processing resume module is first passed through, then passes through digital analog converter (DAC, Digital Analog Converter) convert digital signals into analog signal, be modulated to radiofrequency signal using I/Q modulator, eventually pass through power amplifier, Radiofrequency signal needed for antenna is sent to antenna end by a series of processing operations such as filtering.Currently, the active day that equipment vendor provides The model machine of line largely uses 4 × 2 antenna frame, for realizing the flexible control to wave beam;Under this framework, if wanted It realizes the support to vertical multi-beam and space division multiple access, radio-frequency channel number need to be doubled, but cost can be made excessively high in this way, Abandon this scheme in current most of equipment commercial cities.It is currently, there are under 4 × 2 antenna frame and is directly carried with same frequency dual carrier The mode of I/Q data, still, since the frequency of each subcarrier in two carrier waves is identical, it may appear that because same frequency dual carrier is cut It is weak in addition offset and the problem that causes numeric field power too low.
Therefore, in the case where not increasing radio-frequency channel number, how to improve the ability of active antenna transmission data and make it The problem of the bandwidth that radio frequency mouth occupies does not increase, is current urgent need to resolve.
Summary of the invention
In view of this, the main purpose of the present invention is to provide a kind of processing method of the I/Q data of Remote Radio Unit, System and Remote Radio Unit can improve the ability of active antenna transmission data, reduce cost.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
The present invention provides a kind of processing methods of the I/Q data of radio frequency remote unit RRU, which comprises
After RRU receives the I/Q data that BBU is sent by dual carrier, the I/Q data of the dual carrier is located parallel Reason, by treated, dual carrier is modulated to radiofrequency signal, and exports to antenna end.
In above scheme, it is with frequency dual carrier that the BBU, which sends dual carrier used in I/Q data,.
In above scheme, when the same frequency dual carrier is carrier wave one and carrier wave two, the I/Q data to the dual carrier Carry out parallel processing, comprising:
The I/Q data of the carrier wave one, the I/Q data of the carrier wave two are filtered respectively and Digital Up Convert is handled;
The I/Q data of the I/Q data of the carrier wave one, the carrier wave two is respectively converted into the road the I simulation of the carrier wave one Signal and the road Q analog signal, the road the I analog signal of the carrier wave two and the road Q analog signal;
It is all the way, by the load by the road the I analog signal of the carrier wave one and the combining of the road the I analog signal of the carrier wave two The road the Q analog signal of wave one and the combining of the road the Q analog signal of the carrier wave two is all the way.
In above scheme, the I/Q data to the dual carrier carries out parallel processing, comprising:
The I/Q data of the same frequency dual carrier is filtered respectively, and the filtered same frequency dual carrier is counted respectively Word up-converts to alien frequencies dual carrier;The alien frequencies dual carrier is carrier wave three, carrier wave four;
It is all the way, by the Q of the carrier wave three by the combining of the road the I signal of the road the I signal of the carrier wave three and the carrier wave four The road the Q signal combining of road signal and the carrier wave four for all the way, and by after combining the road I signal and the road Q signal be converted to correspondence Analog signal;
The carrier wave three, the carrier wave four are subjected to frequency-conversion processing respectively, make four frequency conversion of the carrier wave three and the carrier wave For same frequency carrier wave.
In above scheme, before exporting to antenna end, the method also includes:
The radiofrequency signal of the modulated carrier wave three and the carrier wave four is subjected to Frequency mixing processing.
The present invention also provides a kind of radio frequency remote unit RRU, the RRU include transceiver module, parallel processing module and Modulation module;Wherein,
The transceiver module, the I/Q data sent for receiving BBU by dual carrier;For radiofrequency signal to be sent to day Line end;
The parallel processing module carries out parallel processing for the I/Q data to the dual carrier;
The modulation module, for treated that dual carrier is modulated to radiofrequency signal by the parallel processing module.
In above scheme, the I/Q data that the transceiver module receives is that BBU uses the I/Q data sent with frequency dual carrier.
In above scheme, when the same frequency dual carrier is carrier wave one and carrier wave two, the parallel processing module is also used to,
The I/Q data of the carrier wave one, the I/Q data of the carrier wave two are filtered respectively and Digital Up Convert is handled; The I/Q data of the I/Q data of the carrier wave one, the carrier wave two is respectively converted into the road I analog signal and the road Q of the carrier wave one Analog signal, the road the I analog signal of the carrier wave two and the road Q analog signal;By the road the I analog signal of the carrier wave one with it is described The road the I analog signal combining of carrier wave two is that all the way, the road Q of the road the Q analog signal of the carrier wave one and the carrier wave two is simulated Signal combining is all the way.
In above scheme, the parallel processing module is also used to,
The I/Q data of the same frequency dual carrier is filtered respectively, and the filtered same frequency dual carrier is counted respectively Word upconversion process is alien frequencies dual carrier;The alien frequencies dual carrier is carrier wave three, carrier wave four;
It is all the way, by the Q of the carrier wave three by the combining of the road the I signal of the road the I signal of the carrier wave three and the carrier wave four The road the Q signal combining of road signal and the carrier wave four for all the way, and by after combining the road I signal and the road Q signal be converted to correspondence Analog signal;
The carrier wave three, the carrier wave four are subjected to frequency-conversion processing respectively, make four frequency conversion of the carrier wave three and the carrier wave For same frequency carrier wave.
In above scheme, the modulation module is also used to, by the radio frequency of the modulated carrier wave three and the carrier wave four Signal carries out Frequency mixing processing.
The present invention also provides a kind of I/Q data processing systems, and the system comprises baseband processing unit BBU and radio frequency to draw Remote unit R RU, wherein
The BBU, for sending I/Q data to RRU by dual carrier;
The RRU, after the I/Q data sent by dual carrier for receiving the BBU, to the IQ number of the dual carrier According to parallel processing is carried out, by treated, dual carrier is modulated to radiofrequency signal, and exports to antenna end.
In above scheme, the RRU is RRU described above.
Processing method, system and the Remote Radio Unit of the I/Q data of Remote Radio Unit provided by the present invention, RRU connect After receiving the I/Q data that BBU is sent by dual carrier, parallel processing is carried out to the I/Q data of the dual carrier, it will that treated be double Carrier modulation is radiofrequency signal, and is exported to antenna end.In this way, the present invention solves the same frequency pair occurred in current communication system Carrier wave weakens the problem even offset and cause numeric field power too low;And in the case where not increasing radio-frequency channel number, lead to The mode for increasing DAC or I/Q modulator is crossed, same frequency dual carrier is avoided and weakens the problem of even offsetting, improves active antenna biography The ability of transmission of data, reduces costs.Specifically, the present invention in the case where not increasing radio-frequency channel number, passes through increase DAC's Mode realizes same frequency dual carrier function, improves downlink capacity, greatly reduce cost;The present invention is not increase radio frequency logical In the case where road number, by increase I/Q modulator, I/Q data is carried using alien frequencies dual carrier, more I/Q datas can be transmitted, It is not in that same frequency dual carrier weakens the problem of even offsetting, moreover, by described double again because the frequency of two carrier waves is different Carrier wave frequency conversion be with frequency carrier wave, and then make from RRU export be same frequency dual carrier, radio frequency mouth occupy bandwidth not will increase, Downlink capacity is improved, cost is greatly reduced.Also, technical solution of the present invention is particularly suitable for 4 × 2 or 4 × 1 equal antenna holders The application environment of structure.In addition, technical solution of the present invention applies also for the space division multiple access environment of dual carrier.
Detailed description of the invention
Fig. 1 is that base station develops schematic diagram in the prior art;
Fig. 2 is to emit link design principle schematic diagram in the prior art;
Fig. 3 is a kind of implementation process schematic diagram of the processing method of the I/Q data of Remote Radio Unit of the present invention;
Fig. 4 is the composed structure schematic diagram of Remote Radio Unit of the present invention;
Fig. 5 is a kind of link transmissions structural schematic diagram realized same frequency dual carrier and transmit I/Q data of the present invention;
Fig. 6 is that a kind of Remote Radio Unit of the present invention is illustrated by the implementation process that same frequency dual carrier transmits I/Q data method Figure;
Fig. 7 is a kind of link transmissions structural schematic diagram realized alien frequencies dual carrier and transmit I/Q data of the present invention;
Fig. 8 is the implementation process signal that a kind of Remote Radio Unit of the present invention transmits I/Q data method by alien frequencies dual carrier Figure;
Fig. 9 is that the embodiment of the present invention is illustrated under 4 × 1 antenna frames by the process that same frequency dual carrier transmits I/Q data Figure.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is further described in more detail.
Fig. 3 is a kind of implementation process schematic diagram of the processing method of the I/Q data of radio frequency remote unit RRU of the present invention, is such as schemed Shown in 3, method includes the following steps:
After step 301:RRU receives the I/Q data that baseband processing unit BBU is sent by dual carrier, to the dual carrier I/Q data carry out parallel processing;
Here, it is with frequency dual carrier that the BBU, which sends dual carrier used in I/Q data,.
Specifically, the I/Q data to the dual carrier carries out when the same frequency dual carrier is carrier wave one and carrier wave two Parallel processing, comprising:
To the I/Q data of the carrier wave one, the I/Q data of the carrier wave two is filtered respectively and Digital Up Convert (DUC, Digital Up Converter) processing;
The I/Q data of the I/Q data of the carrier wave one, the carrier wave two is respectively converted into the road the I simulation of the carrier wave one Signal and the road Q analog signal, the road the I analog signal of the carrier wave two and the road Q analog signal;
It is all the way, by the load by the road the I analog signal of the carrier wave one and the combining of the road the I analog signal of the carrier wave two The road the Q analog signal of wave one and the combining of the road the Q analog signal of the carrier wave two is all the way.
Specifically, the I/Q data to the dual carrier carries out parallel processing, comprising:
The I/Q data of the same frequency dual carrier is filtered respectively, and the filtered same frequency dual carrier is counted respectively Word up-converts to alien frequencies dual carrier;The alien frequencies dual carrier is carrier wave three, carrier wave four divides the I/Q data of the same frequency dual carrier It is not filtered, and is alien frequencies dual carrier by the filtered same frequency dual carrier difference Digital Up Convert;Assuming that the alien frequencies Dual carrier is carrier wave three, carrier wave four;
It is all the way, by the Q of the carrier wave three by the combining of the road the I signal of the road the I signal of the carrier wave three and the carrier wave four The road the Q signal combining of road signal and the carrier wave four for all the way, and by after combining the road I signal and the road Q signal be converted to correspondence Analog signal;
The carrier wave three, the carrier wave four are subjected to frequency-conversion processing respectively, make four frequency conversion of the carrier wave three and the carrier wave For same frequency carrier wave.
Step 302: dual carrier after processing being modulated to radiofrequency signal, and is exported to antenna end.
Specifically, before exporting to antenna end, the method also includes:
The radiofrequency signal of the modulated carrier wave three and the carrier wave four is subjected to Frequency mixing processing.
Fig. 4 is the composed structure schematic diagram of Remote Radio Unit of the present invention, as shown in figure 4, the Remote Radio Unit packet Include transceiver module 41, parallel processing module 42 and modulation module 43;Wherein,
The transceiver module 41, the I/Q data sent for receiving BBU by dual carrier;For radiofrequency signal to be sent to Antenna end;
The parallel processing module 42 carries out parallel processing for the I/Q data to the dual carrier;
The modulation module 43, for treated that dual carrier is modulated to radiofrequency signal by the parallel processing module 41.
Specifically, the I/Q data that the transceiver module 41 receives is that BBU uses the I/Q data sent with frequency dual carrier.
Specifically, the parallel processing module 42 is also used to when the same frequency dual carrier is carrier wave one and carrier wave two,
The I/Q data of the carrier wave one, the I/Q data of the carrier wave two are filtered respectively and Digital Up Convert is handled; The I/Q data of the I/Q data of the carrier wave one, the carrier wave two is respectively converted into the road I analog signal and the road Q of the carrier wave one Analog signal, the road the I analog signal of the carrier wave two and the road Q analog signal;By the road the I analog signal of the carrier wave one with it is described The road the I analog signal combining of carrier wave two is that all the way, the road Q of the road the Q analog signal of the carrier wave one and the carrier wave two is simulated Signal combining is all the way.
Specifically, the parallel processing module 42 is also used to,
The I/Q data of the same frequency dual carrier is filtered respectively, and the filtered same frequency dual carrier is counted respectively Word upconversion process is alien frequencies dual carrier;Assuming that the alien frequencies dual carrier is carrier wave three, carrier wave four;
It is all the way, by the Q of the carrier wave three by the combining of the road the I signal of the road the I signal of the carrier wave three and the carrier wave four The road the Q signal combining of road signal and the carrier wave four for all the way, and by after combining the road I signal and the road Q signal be converted to correspondence Analog signal;
The carrier wave three, the carrier wave four are subjected to frequency-conversion processing respectively, make four frequency conversion of the carrier wave three and the carrier wave For same frequency carrier wave.
Specifically, the modulation module 43 is also used to,
The radiofrequency signal of the modulated carrier wave three and the carrier wave four is subjected to Frequency mixing processing.
Here, the Remote Radio Unit can also be realized by multiple processing apparatus, for example, Fig. 5 described below or Remote Radio Unit shown in fig. 7.
Fig. 5 is a kind of link transmissions structural schematic diagram realized same frequency dual carrier and transmit I/Q data of the present invention, such as Fig. 5 institute Show, which includes: BBU and RRU;Wherein, the RRU includes: Digital IF Processing module, the first digital-to-analogue conversion Device, the second digital analog converter, the first combiner, the second combiner, I/Q modulator and power amplifier filter module;Wherein, the number Ifd module and the first digital analog converter and the second digital analog converter are connected in parallel, an output end of first digital analog converter It is connect with an input terminal of the first combiner, an input of another output end and the second combiner of first digital analog converter End connection;One output end of second digital analog converter is connect with another input terminal of the first combiner, second digital-to-analogue Another output end of converter is connect with another input terminal of the second combiner;The output end of first combiner, described The output end of two combiners is connect with the input terminal of I/Q modulator respectively;The output end and power amplifier filter module of the I/Q modulator Input terminal connection, the output end of the power amplifier filter module connect with antenna end.
Specifically, the Digital IF Processing module, for receiving the I/Q data that BBU is sent by dual carrier as RRU Afterwards, parallel processing is carried out to the I/Q data of the dual carrier;
When the dual carrier is carrier wave one and carrier wave two;
First digital analog converter, the road I for the I/Q data of the carrier wave one to be converted to the carrier wave one are simulated Signal and the road Q analog signal;
Second digital analog converter, the road I for the I/Q data of the carrier wave two to be converted to the carrier wave one are simulated Signal and the road Q analog signal.
Here, the dual carrier is with frequency dual carrier, and the carrier wave one is identical as the frequency of the carrier wave two.
In order to which the working principle of RRU shown in fig. 5 is described in detail, can be passed through by Remote Radio Unit as shown in FIG. 6 Illustrate with the implementation process schematic diagram of frequency dual carrier transmission I/Q data method.
Fig. 6 is that a kind of Remote Radio Unit of the present invention is illustrated by the implementation process that same frequency dual carrier transmits I/Q data method Figure, as shown in fig. 6, method includes the following steps:
After step 601:RRU receives the I/Q data that BBU is sent by dual carrier, the Digital IF Processing module of RRU is simultaneously Row is filtered carrier wave one and carrier wave two, the processing such as Digital Up Convert;
Here, the carrier wave one is identical with the frequency of the carrier wave two, i.e., the described carrier wave one and the carrier wave two are with frequency. Since Digital IF Processing module is to two parallel processing of the carrier wave one and the carrier wave, i.e., simultaneously to the carrier wave one and described Carrier wave two is handled, and the carrier wave one and the carrier wave two compartment are come, therefore, the carrier wave one and the carrier wave two There is no cancel out each other.
Here, the Digital IF Processing module is to two parallel processing of the carrier wave one and the carrier wave, in the number The function of reason unit can be realized and running on the program on processor everywhere in frequency processing module, can also be by specifically patrolling It collects circuit and realizes.Details are not described herein.
Step 602: by the processing of Digital IF Processing module, the I/Q data of carrier wave one and the I/Q data difference of carrier wave two Analog signal is converted by respective digital analog converter;
Specifically, the I circuit-switched data of carrier wave one is converted to the road I analog signal by the first digital analog converter (DACl), by carrier wave One Q circuit-switched data is converted to the road Q analog signal;The I circuit-switched data of carrier wave two is converted to the road I mould by the second digital analog converter (DAC2) Quasi- signal, is converted to the road Q analog signal for the Q circuit-switched data of carrier wave two.
Here, the I circuit-switched data of carrier wave one or carrier wave two is converted to the road I by the first digital analog converter or the second digital analog converter Analog signal, the method that the Q circuit-switched data of carrier wave one or carrier wave two is converted to the road Q analog signal is same as the prior art, herein It repeats no more.
Step 603: the I circuit-switched data of the I circuit-switched data of carrier wave one and carrier wave two is merged into all the way by the first combiner, and I circuit-switched data after merging is sent to I/Q modulator;The Q circuit-switched data of carrier wave one and the Q circuit-switched data of carrier wave two are closed by second Road device is merged into all the way, and the Q circuit-switched data after merging is sent to I/Q modulator;
Here, the combiner can be the combiner of Two In and One Out, can by the I circuit-switched data of carrier wave one and carrier wave two or The Q circuit-switched data of person's carrier wave one and carrier wave two is merged into all the way, but the I circuit-switched data or Q circuit-switched data between each carrier wave will not be obscured, Only merge.
Here, although the data that carrier wave one and carrier wave two transmit are twice of single carrier, due to carrier wave one and carrier wave Two in the frequency of analog portion be identical, so not increasing in the bandwidth that radio frequency mouth occupies.
Step 604:IQ modulator combiner is merged after I circuit-switched data and Q circuit-switched data be modulated to radiofrequency signal;
Here, the modulator approach of the I/Q modulator is same as the prior art, and details are not described herein.
Step 605: the processing such as will be filtered, amplify, and treated by general by the radiofrequency signal of I/Q modulator modulation Radiofrequency signal is sent to antenna end.
Here, the filtering processing can be realized by filter circuit, and the enhanced processing can be realized by power amplifier.
Here, the I/Q modulator and the power amplifier filter module can be by radio frequencies needed for rf-signal modulation to antenna Signal.
Therefore, Fig. 5, although increasing a digital analog converter, can be avoided together compared with Fig. 2 by the above method Frequency dual carrier weakens the problem of even offsetting, and realizes transmission of the same frequency dual carrier to I/Q data, improves the biography of active antenna The ability of transmission of data, and because the frequency of two carrier waves is identical, what is exported from RRU is same frequency dual carrier, is occupied in radio frequency mouth Bandwidth do not increase, greatly reduce cost.
Fig. 7 is a kind of link transmissions structural schematic diagram realized alien frequencies dual carrier and transmit I/Q data of the present invention, such as Fig. 7 institute Show, which includes: BBU and RRU, wherein the RRU includes: Digital IF Processing module, the first combining Device, the second combiner, digital analog converter, the first splitter, the second splitter, the first I/Q modulator, the second I/Q modulator, third Combiner, frequency mixer and power amplifier filter module;Wherein, the data intermediate frequency module and the first combiner, the second combiner are parallel Connection, the output end of first combiner are connect with an input terminal of the digital analog converter, and the one of the digital analog converter Output end is connect with an input terminal of an input terminal of the first I/Q modulator, the second I/Q modulator respectively by the first splitter; The output end of second combiner is connect with another input terminal of the digital analog converter, the digital analog converter it is another defeated Outlet is connected with another input terminal of another input terminal of the first I/Q modulator, the second I/Q modulator respectively by the second splitter It connects;The output end of first I/Q modulator, second I/Q modulator output end pass through third combiner and frequency mixer Input terminal connection, the output end of the frequency mixer connect with the input terminal of power amplifier filter module, the power amplifier filter module it is defeated Outlet is connect with antenna end.
Specifically, the Digital IF Processing module, for receiving the IQ that BBU is sent by same frequency dual carrier as RRU After data, parallel processing is carried out to the I/Q data of the same frequency dual carrier: the I/Q data of the same frequency dual carrier is carried out respectively Filtering, and the filtered same frequency dual carrier difference Digital Up Convert is handled as alien frequencies dual carrier;
Here, if the dual carrier is carrier wave three and carrier wave four.
Specifically, first combiner, for by the road the I signal of the road the I signal of the carrier wave three and the carrier wave four Combining is all the way;
Specifically, second combiner, for by the road the Q signal of the road the Q signal of the carrier wave three and the carrier wave four Combining is all the way;
Specifically, the digital analog converter, for the road the I signal after being combined and the road Q signal to be converted to corresponding simulation Signal;
Specifically, first I/Q modulator, the road the I analog signal of the carrier wave three for exporting digital analog converter With the road Q analog signal, frequency-conversion processing is carried out, and makes the carrier wave three and the carrier wave four after the 4th I/Q modulator frequency conversion With frequency carrier wave;
Specifically, second I/Q modulator, the road the I analog signal of the carrier wave four for exporting digital analog converter Frequency-conversion processing is carried out with the road Q analog signal, and makes the carrier wave four and the carrier wave three after the third I/Q modulator frequency conversion With frequency carrier wave.
Specifically, first I/Q modulator, is also used to the road the I analog signal of the carrier wave three and the road Q analog signal It is modulated to radiofrequency signal;
Specifically, second I/Q modulator, is also used to the road the I analog signal of the carrier wave four and the road Q analog signal It is modulated to radiofrequency signal;
The frequency mixer, for by the radiofrequency signal of the modulated carrier wave three and the carrier wave four by frequency mixer into Row mixing.
In order to which the working principle of Fig. 7 is described in detail, alien frequencies dual carrier can be passed through by Remote Radio Unit as shown in Figure 8 The implementation process schematic diagram of I/Q data method is transmitted to illustrate.
Fig. 8 is the implementation process signal that a kind of Remote Radio Unit of the present invention transmits I/Q data method by alien frequencies dual carrier Figure, as shown in figure 8, method includes the following steps:
After step 801:RRU receives the I/Q data that BBU is sent by dual carrier, the Digital IF Processing module of RRU is simultaneously Row is filtered carrier wave three and carrier wave four, the processing such as Digital Up Convert;
Specifically, Digital IF Processing module can be by three Digital Up Convert of carrier wave to f1, extremely by four Digital Up Convert of carrier wave f2。
Here, after Digital Up Convert is handled, the frequency f1 of the carrier wave three is greater than the frequency f2 of carrier wave four, and because The carrier wave three is different from the frequency of the carrier wave four, so the frequency spectrum of the two is not overlapped, there is no cancel out each other.
Step 802: the I circuit-switched data of the I circuit-switched data of carrier wave three and carrier wave four being combined into all the way, by the Q circuit-switched data of carrier wave three It is combined into all the way with the Q circuit-switched data of carrier wave four, and analog signal is converted by digital analog converter by the I/Q data after combining;
Here, different with the frequency of carrier wave four due to carrier wave three, so the problem of frequency cancellation is not present.
Step 803: by the road the I analog signal and the road Q analog signal of the carrier wave three of digital analog converter output, the load The road the I analog signal and the road Q analog signal of wave four carry out frequency-conversion processing by respective I/Q modulator respectively, make the carrier wave three It is with frequency carrier wave with the carrier wave four;Also, by the road the I analog signal of the carrier wave three and the road Q analog signal, the carrier wave four The road I analog signal and the road Q analog signal radiofrequency signal is modulated to by respective I/Q modulator respectively;
Here, the frequency of first I/Q modulator and second I/Q modulator is f=(f1-f2)/2;And it is described First I/Q modulator carries out down coversion, and second I/Q modulator carries out up-conversion.
Specifically, the frequency f1 of carrier wave three is after the modulation of the first I/Q modulator, frequency becomes f1-f=f1- (f1- F2)/2=(f1+f2)/2;The frequency f1 of carrier wave three is downconverted to (f1+f2)/2 by i.e. described first I/Q modulator.Carrier wave four For frequency f2 after the modulation of the second I/Q modulator of IQ, frequency becomes f2+f=f1+ (f1-f2)/2=(f1+f2)/2;It is i.e. described Second I/Q modulator is by the frequency f2 up-conversion of carrier wave four to (f1+f2)/2;Because passing through the modulated carrier wave of the first I/Q modulator Three is identical with by the frequency of the modulated carrier wave four of the second I/Q modulator, so not will increase in the bandwidth that radio frequency mouth occupies.
Step 804: the radiofrequency signal of the modulated carrier wave three and the carrier wave four is mixed by frequency mixer;
Step 805: the radiofrequency signal after mixing being filtered, the processing such as power amplifier, the radiofrequency signal is converted into day Radiofrequency signal needed for line end, and export to antenna end.
Fig. 7 is compared with Fig. 2, although merely adding an I/Q modulator on device, held using alien frequencies dual carrier I/Q data is carried, more I/Q datas can be transmitted, and is not in that same frequency dual carrier weakens because the frequency of two carrier waves is different The problem of even offsetting;Moreover, can increase if being still two alien frequencies carrier waves before radio frequency mouth in the bandwidth that radio frequency mouth occupies Add, i.e., alien frequencies dual carrier can the bandwidth that occupy one times more;So being two by two alien frequencies wave conversions before frequency mixer The identical carrier wave of frequency, and be the frequency for meeting radiofrequency signal with frequency wave conversion by the frequency lower two by frequency mixer Rate is sent to antenna end using the processing of amplification, filtering.Because what is exported from RRU is same frequency dual carrier, thus in radio frequency mouth The bandwidth of occupancy not will increase.
Fig. 9 is that the embodiment of the present invention is illustrated under 4 × 1 antenna frames by the process that same frequency dual carrier transmits I/Q data Figure, as shown in figure 9, the process the following steps are included:
After step 901:RRU receives the carrier wave one of BBU and the I/Q data of carrier wave two, the Digital IF Processing module of RRU The I/Q data of carrier wave one and carrier wave two is copied as to four tunnels, and four road I/Q datas of carrier wave one and carrier wave two are carried out respectively The adjustment of phase and amplitude;
The Digital IF Processing module of step 902:RRU is to the first via I/Q data of carrier wave one and the first via IQ of carrier wave two Data carry out parallel processing;
Here, the carrier wave one is identical with the frequency of carrier wave two, and therefore, the Digital IF Processing module of RRU is to carrier wave one Each road I/Q data and each road I/Q data of carrier wave two carry out parallel processing, i.e., simultaneously to the carrier wave one and the carrier wave two into Row processing, and the carrier wave one and the carrier wave two compartment are come, in this way, phase is not present in the carrier wave one and the carrier wave two The case where mutually offsetting.
Step 903: by the processing of Digital IF Processing module, the first of the first via I/Q data of carrier wave one and carrier wave two Road I/Q data is converted into analog signal by respective digital analog converter respectively;
Here, the I circuit-switched data of the first via I/Q data of carrier wave one is converted to I by digital analog converter corresponding with carrier wave one The Q circuit-switched data of the first via I/Q data of carrier wave one is converted to the road Q analog signal by road analog signal;It is corresponding with carrier wave two The I circuit-switched data of the first via I/Q data of carrier wave two is converted to the road I analog signal by digital analog converter, by the first via IQ of carrier wave two The Q circuit-switched data of data is converted to the road Q analog signal.
Step 904: by the road I of the first via I/Q data of I circuit-switched data and carrier wave two in the first via I/Q data of carrier wave one Data are merged into all the way by combiner;By the Q of the Q circuit-switched data of the first via IQ of carrier wave one and the first via I/Q data of carrier wave two Circuit-switched data is merged into all the way by combiner;
Step 905: I and Q data after the first via I/Q data of the first via IQ of carrier wave one and carrier wave two is merged are passed through It crosses I/Q modulator and is modulated to radiofrequency signal;
After step 906:IQ modulators modulate to radiofrequency signal, the filtering power amplifier processing module of RRU is to the radiofrequency signal It processing, the radiofrequency signal needed for the radiofrequency signal is converted to antenna end such as is filtered, amplifies, and being sent to antenna end.
The carrier wave one second and third, four road I/Q datas and the carrier wave two second and third, four road I/Q datas, pass through The processing of step 901 to 906, to realize the transmission with frequency dual carrier to I/Q data.
The present invention also describes a kind of I/Q data processing system, and the system comprises baseband processing unit BBU and radio frequency to draw Remote unit R RU, wherein
The BBU, for sending I/Q data to RRU by dual carrier;
The RRU, after the I/Q data sent by dual carrier for receiving the BBU, to the IQ number of the dual carrier It is with frequency carrier wave by the dual carrier frequency conversion according to progress parallel processing, and when the dual carrier is alien frequencies dual carrier;It will be with frequency Dual carrier be modulated to radiofrequency signal, and export to antenna end.
Specifically, the RRU RRU described above.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention, it is all Made any modifications, equivalent replacements, and improvements etc. within the spirit and principles in the present invention, should be included in protection of the invention Within the scope of.

Claims (6)

1. a kind of processing method of the I/Q data of radio frequency remote unit RRU, which is characterized in that the described method includes:
After RRU receives the I/Q data that baseband processing unit BBU is sent by same frequency dual carrier, to the IQ of the same frequency dual carrier Data carry out parallel processing, and by treated, the same frequency dual carrier is modulated to radiofrequency signal, and exports to antenna end;
Wherein, the I/Q data to the same frequency dual carrier carries out parallel processing, comprising:
When the same frequency dual carrier is carrier wave one and carrier wave two, to the IQ number of the I/Q data of the carrier wave one, the carrier wave two According to be filtered respectively and Digital Up Convert processing;The I/Q data of the I/Q data of the carrier wave one, the carrier wave two is turned respectively It is changed to the road I analog signal and the road Q analog signal, the road the I analog signal of the carrier wave two and the road Q the simulation letter of the carrier wave one Number;It is all the way, by the carrier wave one by the road the I analog signal of the carrier wave one and the combining of the road the I analog signal of the carrier wave two The road Q analog signal and the carrier wave two the combining of the road Q analog signal for all the way;
Alternatively, the I/Q data to the same frequency dual carrier carries out parallel processing, further includes:
The I/Q data of the same frequency dual carrier is filtered respectively, and numerically by the filtered same frequency dual carrier difference Frequency conversion is alien frequencies dual carrier;The alien frequencies dual carrier is carrier wave three, carrier wave four;By the road the I signal of the carrier wave three and the load The road the I signal combining of wave four is all the way, by the combining of the road the Q signal of the road the Q signal of the carrier wave three and the carrier wave four for all the way, And by after combining the road I signal and the road Q signal be converted to corresponding analog signal;The carrier wave three, the carrier wave four are distinguished Frequency-conversion processing is carried out, makes the carrier wave three and four frequency conversion of the carrier wave with frequency carrier wave.
2. the method according to claim 1, wherein exporting to before antenna end, the method also includes:
The radiofrequency signal of the modulated carrier wave three and the carrier wave four is subjected to Frequency mixing processing.
3. a kind of radio frequency remote unit RRU, which is characterized in that the RRU includes transceiver module, parallel processing module and modulation mould Block;Wherein,
The transceiver module, the I/Q data sent for receiving BBU by same frequency dual carrier;For radiofrequency signal to be sent to day Line end;
The parallel processing module carries out parallel processing for the I/Q data to the same frequency dual carrier;
The modulation module, for treated that the same frequency dual carrier is modulated to radiofrequency signal by the parallel processing module;
Wherein, the parallel processing module is specifically used for: when the same frequency dual carrier is carrier wave one and carrier wave two, to the load The I/Q data of wave one, the carrier wave two I/Q data be filtered respectively and Digital Up Convert processing;By the IQ of the carrier wave one Data, the carrier wave two I/Q data be respectively converted into the road the I analog signal and the road Q analog signal, the load of the carrier wave one The road the I analog signal and the road Q analog signal of wave two;The road I of the road the I analog signal of the carrier wave one and the carrier wave two is simulated Signal combining is all the way, it is all the way that the road the Q analog signal of the carrier wave one and the road the Q analog signal of the carrier wave two, which are combined,;
Alternatively, the parallel processing module also particularly useful for: the I/Q data of the same frequency dual carrier is filtered respectively, and will The filtered same frequency dual carrier difference Digital Up Convert processing is alien frequencies dual carrier;The alien frequencies dual carrier be carrier wave three, Carrier wave four;It is all the way, by the road Q of the carrier wave three by the combining of the road the I signal of the road the I signal of the carrier wave three and the carrier wave four The road the Q signal combining of signal and the carrier wave four for all the way, and by after combining the road I signal and the road Q signal be converted to it is corresponding Analog signal;The carrier wave three, the carrier wave four are subjected to frequency-conversion processing respectively, make four frequency conversion of the carrier wave three and the carrier wave For same frequency carrier wave.
4. Remote Radio Unit according to claim 3, which is characterized in that the modulation module is also used to,
The radiofrequency signal of the modulated carrier wave three and the carrier wave four is subjected to Frequency mixing processing.
5. a kind of I/Q data processing system, which is characterized in that the system comprises baseband processing unit BBU and Remote Radio Unit RRU, wherein
The BBU, for sending I/Q data to RRU by same frequency dual carrier;
The RRU, after the I/Q data sent by same frequency dual carrier for receiving the BBU, to the same frequency dual carrier I/Q data carries out parallel processing, and by treated, the same frequency dual carrier is modulated to radiofrequency signal, and exports to antenna end;
Wherein, the I/Q data to the same frequency dual carrier carries out parallel processing, comprising:
When the same frequency dual carrier is carrier wave one and carrier wave two, to the IQ number of the I/Q data of the carrier wave one, the carrier wave two According to be filtered respectively and Digital Up Convert processing;The I/Q data of the I/Q data of the carrier wave one, the carrier wave two is turned respectively It is changed to the road I analog signal and the road Q analog signal, the road the I analog signal of the carrier wave two and the road Q the simulation letter of the carrier wave one Number;It is all the way, by the carrier wave one by the road the I analog signal of the carrier wave one and the combining of the road the I analog signal of the carrier wave two The road Q analog signal and the carrier wave two the combining of the road Q analog signal for all the way;
Alternatively, the I/Q data to the same frequency dual carrier carries out parallel processing, further includes:
The I/Q data of the same frequency dual carrier is filtered respectively, and numerically by the filtered same frequency dual carrier difference Frequency conversion is alien frequencies dual carrier;The alien frequencies dual carrier is carrier wave three, carrier wave four;By the road the I signal of the carrier wave three and the load The road the I signal combining of wave four is all the way, by the combining of the road the Q signal of the road the Q signal of the carrier wave three and the carrier wave four for all the way, And by after combining the road I signal and the road Q signal be converted to corresponding analog signal;The carrier wave three, the carrier wave four are distinguished Frequency-conversion processing is carried out, makes the carrier wave three and four frequency conversion of the carrier wave with frequency carrier wave.
6. system according to claim 5, which is characterized in that the RRU is RRU as claimed in claim 4.
CN201310213736.2A 2013-05-31 2013-05-31 Processing method, system and the Remote Radio Unit of the I/Q data of Remote Radio Unit Active CN104219020B (en)

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