CN101924593B - Uplink/downlink antenna pulling away device, transmitter, receiver and channel measuring method - Google Patents
Uplink/downlink antenna pulling away device, transmitter, receiver and channel measuring method Download PDFInfo
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- CN101924593B CN101924593B CN201010240099.4A CN201010240099A CN101924593B CN 101924593 B CN101924593 B CN 101924593B CN 201010240099 A CN201010240099 A CN 201010240099A CN 101924593 B CN101924593 B CN 101924593B
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Abstract
The invention provides an uplink/downlink antenna pulling away device, transmitter, receiver and channel measuring method, relating to the channel measuring technology. The downlink antenna pulling away device used for distributed multilink multiple antenna broadband channel measuring system comprises an electro-optic converter used for modulating a radio frequency signal emitted by the transmitting unit of the distributed multilink multiple antenna broadband channel measuring system into an optical signal, an optical fiber which is connected with the electro-optic converter and is used for transmitting the optical signal generated by modulation of the electro-optic converter as well as an antenna pulling away unit which is connected with the optical fiber, comprises an optic-electro converter connected with the optical fiber and is used for receiving the optical signal transmitted by the optical fiber and demodulating the optical signal into the radio frequency signal. By the embodiment of the invention, the measuring on distributed channel can be more flexible and convenient.
Description
Technical field
The present invention relates to channel measurement technology, particularly relate to a kind of uplink/downlink antenna pulling away transmitter, receiver and channel measuring method.
Background technology
Under traditional cellular network architecture, single-link MIMO technique has become one of mainstream standard of new generation of wireless communication system, but owing to being subject to path loss, shadow effect and neighbor cell are total to the impact of channel signal interference, Cell Edge User is difficult to reach the spectrum efficiency identical with Cell Center User and service quality (QoS) grade, therefore base station side transmitting antenna must improve the covering that radio frequency power output effectively could ensure edge cell user, this is adding output energy ezpenditure virtually, be not suitable with the demand of following green communications development.In addition, conventional cellular cell, in user's high speed movement, must provide good power control, RRM and handover scheduling.But along with the rising gradually of communication frequency, MPS process area diminishes gradually, thus cause handover scheduling frequently, this will cause very large load pressure to core network, and a kind of new network framework therefore must be adopted to realize the target of more spectral efficient, lower outage probability and reliable communication links more.
At present, for the distributed network architecture that existing cellular architecture evolution proposes, utilize optical fiber or coaxial cable radio frequency output port to be zoomed out the diverse location be geographically separated from each other, effectively can solve the difficult problem that conventional cellular network runs into.Such as when user moves between different antennae port time, the user group of multiple cell can be served by the set of selection virtual-antenna, thus the problem avoiding frequent handovers to manage, and effectively reduce the load of core network.In addition, to the user group being positioned at cell edge position, the distributed virtual antenna set nearest with user's standoff distance can be selected, carry out LoS (Line of Sight, sighting distance) communication under condition, therefore the service quality rating of cell edge user can effectively be improved, the community that each so distributed transmit port can adopt lower transmitting power to cover to serve thus save energy resource consumption.Can see from above-mentioned analysis, distributed network system (DNS) has possessed the huge advantage of the aspects such as covering, spectrum efficiency and transmitting power.Therefore, consider that reasonable development frequency spectrum resource is to adapt to the traffic data rate improved constantly future, and optimized network structure accesses for following radio data and the needs of networking, must become basis and the key point of future communication systems to the research of the nature of radio propagation under broadband, multiple antennas, distributed nature.Only abundant research and understand designed system channel characteristics after, just can take the various physical layer that adapts with it and upper layer techniques, thus fully excavate the capacity of this system, the performance of one-step optimization system of going forward side by side.
In the geographical environment of reality, carry out the measurement of wireless channel, be the optimal path understanding real channel feature.Important Research on Channel instrument can be obtained by channel measurement, wherein the most basic is exactly channel impulse response, can extract on this basis and add up obtain different frequency range large scale loss, Yi Jikong, time, multipath fading parameter on frequency domain and other correlation properties.Meanwhile, measurement data can also provide reference data for Channel Modeling, comes validity and the reasonability of verification model with this.
Traditional channel measuring method and device, can only be used for the channel measurement of single-link.Therefore, need a kind of new technical scheme, to be applicable to the measurement of distributed multi-antenna broad-band channel.
Summary of the invention
The object of the invention is to propose a kind of uplink/downlink antenna pulling away transmitter, receiver and channel measuring method, with make to the measurement of distributed channel can more flexibly, convenient.
For achieving the above object, the invention provides a kind of transmitter comprising uplink/downlink antenna pulling away device, described transmitter comprises:
For the uplink/downlink antenna pulling away device of distributed multilink multiple antennas measuring bandwidth channel system, comprising:
Electrical to optical converter is light signal for the rf-signal modulation sent by the transmitter unit from distributed multilink multiple antennas measuring bandwidth channel system;
The optical fiber be connected with described electrical to optical converter, for transmitting the light signal after described electrical to optical converter modulation;
Antenna pulling away unit with described Fiber connection, comprising: with the optical-electrical converter of described Fiber connection, for receiving the light signal of described Optical Fiber Transmission, and is radiofrequency signal by described optical signal demodulation; The power amplifier be connected with described optical-electrical converter, for carrying out power amplification to the radiofrequency signal after described optical-electrical converter demodulation, thus determines the transmitted power of feed antenna;
The master control set be connected with described uplink/downlink antenna pulling away device, for dispatching the switching time slot of each port, and Radio Resource managed and distributes, described master control set comprises the power amplifier be connected with described uplink/downlink antenna pulling away device, radiofrequency signal for sending the transmitter unit of described distributed multilink multiple antennas measuring bandwidth channel system carries out power amplification, and sends to described uplink/downlink antenna pulling away device; Wherein, described port is the multiple ports be divided into according to the difference of channel measurement task by aerial array, and each port arrangement has multiple antennas group.
For achieving the above object, present invention also offers a kind of channel measuring method based on above-mentioned transmitter, comprising: the aerial array of described transmitter is divided into multiple port, wherein, each described port arrangement has multiple antennas group, and described port is connected with described uplink/downlink antenna pulling away device; By described optical fiber, by described antenna pulling away unit and described multiple antennas group as a whole, zoom out geographically with other antenna pulling away unit of described transmitter and multiple antennas group overall, the position be separated from each other; By described antenna pulling away unit and multiple antennas group, gather the real time channel impulse response data on diverse geographic location; By the treatment and analysis to real time channel impulse response data, obtain the multi-Dimensional parameters that can reflect distributed multilink wireless channel characteristics.
The invention provides a kind of receiver of uplink antenna extension apparatus, comprising:
For the uplink antenna extension apparatus of distributed multilink multiple antennas measuring bandwidth channel system, comprising:
Antenna pulling away unit, comprising: electrical to optical converter, for will be light signal from the rf-signal modulation received by described distributed multilink multiple antennas measuring bandwidth channel system; The low noise amplifier be connected with described electrical to optical converter, for amplifying the RF signal power from reception antenna feed-in, wherein, described radiofrequency signal is from the transmitter of described distributed multilink multiple antennas measuring bandwidth channel system, and the radiofrequency signal after amplifying is sent to described electrical to optical converter by described low noise amplifier;
The optical fiber be connected with described electrical to optical converter, for transmitting the light signal after described electrical to optical converter modulation;
With the optical-electrical converter of described Fiber connection, for receiving the light signal of described Optical Fiber Transmission, and be radiofrequency signal by described optical signal demodulation.
The master control set be connected with described uplink antenna extension apparatus, for dispatching the switching time slot of each port, and Radio Resource managed and distributes, described master control set comprises the low noise amplifier be connected with described uplink antenna extension apparatus, for amplifying the power of the radiofrequency signal from described optical-electrical converter;
Wherein, described port is the multiple ports be divided into according to the difference of channel measurement task by aerial array, and each port arrangement has multiple antennas group.
For achieving the above object, present invention also offers a kind of channel measuring method based on above-mentioned receiver, comprising: the aerial array of described receiver is divided into multiple port, wherein, each described port arrangement has multiple antennas group, and described port is connected with described uplink antenna extension apparatus; By described optical fiber, by described antenna pulling away unit and described multiple antennas group as a whole, zoom out geographically with other antenna pulling away unit of described transmitter and multiple antennas group overall, the position be separated from each other; By described antenna pulling away unit and multiple antennas group, gather the real time channel impulse response data on diverse geographic location; By the treatment and analysis to real time channel impulse response data, obtain the multi-Dimensional parameters that can reflect distributed multilink wireless channel characteristics.
Based on technique scheme, according to embodiments of the invention, by uplink/downlink antenna pulling away device, channel measuring method and system can be used in carrying out Measurement accuracy to the broad-band channel be distributed in multiple multiaerial systems of diverse geographic location under various communication environments simultaneously, thus can be further used for multi-dimensional channel feature extraction, channel capacity analysis, modeling and systems organization etc. by surveying the data obtained.By embodiments of the invention, making can more flexibly, conveniently to the measurement of distributed channel.
Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further explanation of the present invention, forms a part of the present invention.Schematic description and description of the present invention only for explaining the present invention, but does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the distributed multilink multiple antennas measuring bandwidth channel system according to the embodiment of the present invention.
Fig. 2 is the structural representation of the uplink/downlink antenna pulling away device according to the embodiment of the present invention.
Fig. 3 is the structural representation of uplink/downlink antenna pulling away device according to another embodiment of the present invention.
Fig. 4 is the structural representation of the transmitter according to the embodiment of the present invention.
Fig. 5 is the structural representation of transmitter according to another embodiment of the present invention.
Fig. 6 is the flow chart of the channel measuring method according to the embodiment of the present invention.
Fig. 7 is the structural representation of the uplink antenna extension apparatus according to the embodiment of the present invention.
Fig. 8 is the structural representation of uplink antenna extension apparatus according to another embodiment of the present invention.
Fig. 9 is the structural representation of the receiver according to the embodiment of the present invention.
Figure 10 is the structural representation of receiver according to another embodiment of the present invention.
Figure 11 is the flow chart of channel measuring method according to another embodiment of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described in more detail, exemplary embodiment of the present invention is wherein described.In the accompanying drawings, identical label represents identical or similar assembly or element.
Fig. 1 is the structural representation of the distributed multilink multiple antennas measuring bandwidth channel system 100 according to the embodiment of the present invention.Distributed multilink multiple antennas measuring bandwidth channel system 100 comprises master control set 102, port one 04, antenna pulling away unit 106 and optical fiber 108.
Master control set 102 may be used for the switching time slot dispatching each port one 04, and to the management of Radio Resource and distribution.In distributed multilink multiple antennas measuring bandwidth channel system 100, can by aerial array according to channel measurement task (such as, city macrocellular (UMa), city microcellulor (UMi), suburb macrocellular (SMa), rural area macrocellular (RMa), indoor focus (InH) area etc.) difference be divided into multiple port one 04, and configure multiple antennas group for each port one 04.
By optical fiber 108, by the multiple antennas group of antenna pulling away unit 106 and port one 04 as a whole, zoom out geographically with other antenna pulling away unit 106 of transmitter or receiver and port one 04 multiple antennas group overall, the position be separated from each other.
According to embodiments of the invention, distributed multilink multiple antennas measuring bandwidth channel system 100 may be used for different frequency range, measures distributed wireless channel under different communication environments, such as, under frequency range that IMT-Advanced distributes, to the UMa of ITU-R M.2135 defined, UMi, SMa, the scenes such as RMa, InH, carry out the channel measurement under distributed network architecture.By antenna pulling away unit 106 and port one 04, not only can obtain the channel impulse response data (channel characteristics) of distributed multilink multiple antennas measuring system under Cover treatment scope, different antennae array configurations, in addition, multidimensional channel parameter estimation, channel capacity analysis and modeling can also be further used for by measuring the channel impulse response obtained, also can provide detailed channel characteristics and simulation model for the research of DWCS, exploitation and assessment.
Fig. 2 is the structural representation of the uplink/downlink antenna pulling away device 200 according to the embodiment of the present invention.Uplink/downlink antenna pulling away device 200 comprises electrical to optical converter 202, optical fiber 204 and antenna pulling away unit 210.
Electrical to optical converter 202 is light signal for the rf-signal modulation sent by the transmitter unit from distributed multilink multiple antennas measuring bandwidth channel system.
The optical fiber 204 be connected with electrical to optical converter 202, for transmitting the light signal after electrical to optical converter modulation.
The antenna pulling away unit 210 be connected with optical fiber 204, comprising: with the optical-electrical converter 212 of Fiber connection.The light signal that optical-electrical converter 212 transmits for receiving optical fiber 204, and be radiofrequency signal by optical signal demodulation.
By setting up uplink/downlink antenna pulling away device for the transmitter of distributed multilink multiple antennas measuring bandwidth channel system, can utilize optical fiber by antenna pulling away cell distribution in different geographical locations, thus Measurement accuracy can be carried out to the broad-band channel characteristic of distributed multi-antenna system.By embodiments of the invention, make the channel measurement under distributed network architecture more flexibly, conveniently.
Fig. 3 is according to feature of the present invention, uplink/downlink antenna pulling away device 300 structural representation of another embodiment appended.Uplink/downlink antenna pulling away device 300 comprises electrical to optical converter 302, optical fiber 304 and antenna pulling away unit 310.
Electrical to optical converter 302 is light signal for the rf-signal modulation sent by the transmitter unit from distributed multilink multiple antennas measuring bandwidth channel system.
The optical fiber 304 be connected with electrical to optical converter 302, for transmitting the light signal after electrical to optical converter modulation.
The antenna pulling away unit 310 be connected with optical fiber 304, comprising: optical-electrical converter 312 and power amplifier 314.Wherein, optical signal demodulation for receiving the light signal of Optical Fiber Transmission, and is radiofrequency signal by the optical-electrical converter 312 be connected with optical fiber 304.The power amplifier 314 be connected with optical-electrical converter 312, for carrying out power amplification to the radiofrequency signal after optical-electrical converter 312 demodulation, thus determines the transmitted power of feed antenna.
Fig. 4 is the structural representation of the transmitter 400 according to the embodiment of the present invention.Transmitter 400 comprises master control set 402 and uplink/downlink antenna pulling away device 200.Uplink/downlink antenna pulling away device 200, in being described above, repeats no more herein.
Master control set 402 is connected with uplink/downlink antenna pulling away device 200, for dispatching the switching time slot of each port, and manages Radio Resource and distributes.In one embodiment, master control set 402 comprises power amplifier 404.Power amplifier 404 is by antenna switching unit and port, be connected with uplink/downlink antenna pulling away device 200, radiofrequency signal for sending distributed multilink multiple antennas measuring bandwidth channel systems radiate unit carries out power amplification, and sends to uplink/downlink antenna pulling away device 200.Power amplifier 404 is installed concentratedly in master control set 402, not only can reduce the holistic cost of distributed channel measuring equipment, the United Dispatching to power output and distribution can also be met simultaneously.Master control set 402 also comprises transmitter unit and antenna switching unit.Transmitter unit is used for converting baseband signal to radio frequency output signal.Antenna switching unit under the control of master control set, for completing the switching between different port.
Fig. 5 is the structural representation of transmitter 500 according to another embodiment of the present invention.Transmitter 500 comprises master control set 502 and uplink/downlink antenna pulling away device 300.Uplink/downlink antenna pulling away device 300, in being described above, repeats no more herein.
Master control set 502 is connected with uplink/downlink antenna pulling away device 300, for dispatching the switching time slot of each port, and manages Radio Resource and distributes.Power amplifier 314 is arranged on respectively in uplink/downlink antenna pulling away device 300, under meeting the certain condition of channel measurement system output gross power, by carrying out flexible configuration to the power of each output port, effectively can expand the actual area coverage of measured community, and promote the quality of cell edge Received signal strength.But said method can the holistic cost of corresponding increase measuring equipment, therefore, in channel measurement process, can according to actual measurement demand, in reduction equipment cost with promote to measure between flexibility and compromise.
Master control set 502 also comprises transmitter unit and antenna switching unit.Transmitter unit is used for converting baseband signal to radio frequency output signal.Antenna switching unit under the control of master control set, for completing the switching between different port.
It will be appreciated by those skilled in the art that, the transmitter being configured with antenna pulling away device is not limited to the fixed position of cellular cell (geometric center of such as cellular cell), and can realize Distributed coverage and measurement by the position of arranging net of each antenna pulling away unit of adjustment.
Fig. 6 is the flow chart of the channel measuring method 600 according to the embodiment of the present invention.The transmitter 400 of description based on above-mentioned Fig. 4 of channel measuring method 600 or the transmitter 500 of Fig. 5, but be not limited to the version of transmitter 400 or transmitter 500.
In step 602, the aerial array of transmitter is divided into multiple port, wherein, each port arrangement has multiple antennas group, and port is connected with uplink/downlink antenna pulling away device.Aerial array can be such as ODA (Omni Direction Antenna, omnidirectional antenna) or ULA (UniformLinear Antenna, linear antenna) or the configuration of UCA (Uniform Circular Antenna, even loop aerial).In one embodiment, can by aerial array according to channel measurement task (such as, city macrocellular (UMa), city microcellulor (UMi), suburb macrocellular (SMa), rural area macrocellular (RMa), indoor focus (InH) area etc.) difference be divided into multiple port, and be each port arrangement multiple antennas group.
In step 604, by optical fiber, by antenna pulling away unit and multiple antennas group as a whole, zoom out geographically with other antenna pulling away unit of transmitter and multiple antennas group overall, the position be separated from each other.
In step 606, by antenna pulling away unit and multiple antennas group, gather the real time channel impulse response data on diverse geographic location.
In step 608, by the treatment and analysis to real time channel impulse response data, obtain the multi-Dimensional parameters that can reflect distributed multilink wireless channel characteristics.
In one embodiment, before carrying out the measurements, can calibrate uplink/downlink antenna pulling away device, to eliminate the intrinsic system responses of measuring equipment, thus obtain complete wireless channel propagation characteristic.
Fig. 7 is the structural representation of the uplink antenna extension apparatus 700 according to the embodiment of the present invention.Uplink antenna extension apparatus 700 comprises: antenna pulling away unit 710, optical fiber 704 and optical-electrical converter 706.
Antenna pulling away unit 710, comprising: electrical to optical converter 712, for being light signal by the rf-signal modulation from distributed multilink multiple antennas measuring bandwidth channel system transmitter.
The optical fiber 704 be connected with electrical to optical converter 712, for transmitting the light signal after electrical to optical converter 712 is modulated.
Optical signal demodulation for receiving the light signal that optical fiber 704 transmits, and is radiofrequency signal by the optical-electrical converter 706 be connected with optical fiber 704.
By setting up uplink antenna extension apparatus for the transmitter of distributed multilink multiple antennas measuring bandwidth channel system, can utilize optical fiber by antenna pulling away cell distribution in different geographical locations, thus Measurement accuracy can be carried out to the broad-band channel characteristic of distributed multi-antenna system.By embodiments of the invention, make the channel measurement under distributed network architecture more flexibly, conveniently.
Fig. 8 is according to feature of the present invention, uplink antenna extension apparatus 800 structural representation of another embodiment appended.Uplink antenna extension apparatus 800 comprises: antenna pulling away unit 810, optical fiber 804 and optical-electrical converter 806.
Antenna pulling away unit 810, comprising: electrical to optical converter 812 and low noise amplifier 814.Wherein, electrical to optical converter 812 for by from distributed multilink multiple antennas measuring bandwidth channel system acceptance to rf-signal modulation be light signal.The low noise amplifier 814 be connected with electrical to optical converter 812, for amplifying the RF signal power from reception antenna feed-in, object is to improve output signal-to-noise ratio, wherein, radiofrequency signal is from distributed multilink multiple antennas measuring bandwidth channel system transmitter, and the radiofrequency signal after amplifying is sent to electrical to optical converter 812 by low noise amplifier 814.
The optical fiber 804 be connected with electrical to optical converter 812, for transmitting the light signal after electrical to optical converter 812 is modulated.
Optical signal demodulation for receiving the light signal that optical fiber 804 transmits, and is radiofrequency signal by the optical-electrical converter 806 be connected with optical fiber 804.
The structural representation of Fig. 9 for drawing out according to embodiment of the present invention receiver 900.Receiver 900 comprises master control set 902 and uplink antenna extension apparatus 700.Uplink antenna extension apparatus 700, in being described above, repeats no more herein.
Master control set 902 is connected with uplink antenna extension apparatus 700, for dispatching the switching time slot of each port of master control set, and manages Radio Resource and distributes.In one embodiment, master control set 902 comprises low noise amplifier 904.Low noise amplifier 904, by antenna switching unit and port, is connected with uplink antenna extension apparatus 700, for amplifying the power of the radiofrequency signal from optical-electrical converter.Low noise amplifier 904 is installed concentratedly in master control set 902, the holistic cost of distributed channel measuring equipment can be reduced.Master control set 902 also comprises receiving element and antenna switching unit.Receiving element is used for converting radiofrequency signal to baseband signal.Antenna switching unit under the control of master control set, for completing the switching between different port.
Figure 10 is the structural representation of receiver 1000 according to another embodiment of the present invention.Receiver 1000 comprises master control set 1002 and uplink antenna extension apparatus 800.Uplink antenna extension apparatus 800, in being described above, repeats no more herein.
Master control set 1002 is connected with uplink antenna extension apparatus 800, for dispatching the switching time slot of each port of master control set, and manages Radio Resource and distributes.Low noise amplifier 904 is arranged on respectively in uplink antenna extension apparatus 800, flexible configuration can be carried out to each receiving port, meet the SNR demand of each port distribution formula channel measurement Received signal strength.But said method can the holistic cost of corresponding increase measuring equipment, therefore, in channel measurement process, can according to actual measurement demand, in reduction equipment cost with promote to measure between flexibility and compromise.Master control set 1002 also comprises receiving element and antenna switching unit.Receiving element is used for converting radiofrequency signal to baseband signal.Antenna switching unit under the control of master control set, for completing the switching between different port.
It will be appreciated by those skilled in the art that, the receiver being configured with antenna pulling away device is not limited to the fixed position of cellular cell (geometric center of such as cellular cell), and can realize Distributed coverage and measurement by the position of arranging net of each antenna pulling away unit of adjustment.
Figure 11 is the flow chart of channel measuring method 1100 according to another embodiment of the present invention.The receiver 900 of description based on above-mentioned Fig. 9 of channel measuring method 1100 or the receiver 1000 of Figure 10, but be not limited to the version of receiver 900 or receiver 1000.
In step 1102, the aerial array of receiver is divided into multiple port, wherein, each port arrangement has multiple antennas group, and port is connected with uplink antenna extension apparatus.In one embodiment, can by aerial array according to channel measurement task (such as, city macrocellular (UMa), city microcellulor (UMi), suburb macrocellular (SMa), rural area macrocellular (RMa), indoor focus (InH) area etc.) difference be divided into multiple port, and be each port arrangement multiple antennas group.
In step 1104, by optical fiber, by antenna pulling away unit and multiple antennas group as a whole, zoom out geographically with other antenna pulling away unit of receiver and multiple antennas group overall, the position be separated from each other.
In a step 1106, by antenna pulling away unit and multiple antennas group, gather the real time channel impulse response data on diverse geographic location.
In step 1108, by the treatment and analysis to real time channel impulse response data, obtain the multi-Dimensional parameters that can reflect distributed multilink wireless channel characteristics.
In one embodiment, before carrying out the measurements, can calibrate uplink antenna extension apparatus, to eliminate the intrinsic system responses of measuring equipment, thus obtain complete wireless channel propagation characteristic.
Under those skilled in the art will appreciate that embodiments of the invention can be applicable to single cell conditions, the measurement of distributed single user and multi-user wireless channels, under also can being applicable to multiple cell situation, the measurement of distributed single user and multi-user wireless channels.In addition, embodiments of the invention can be used for measuring distributed multilink mimo systems, singly enter multi-output system, enter singly to go out system or single-input single-output system more.The present invention is applicable to different scene, frequency range and measurement target, directly can obtain the channel impulse response of distributed multi-antenna system.Embodiments of the invention, are not only applicable to TDD (Time Division Duplexing, time division duplex) channel measurement, can be generalized to FDD (Frequency Division Duplexing, Frequency Division Duplexing (FDD)) channel measurement simultaneously yet.Meeting channel measurement precision, namely TDD system is required to meet coherence time, under FDD system is required to meet the condition of coherence bandwidth, can be obtained time domain, the frequency domain parameter of reflection distributed wireless channel propagation characteristics by embodiments of the invention.
According to embodiments of the invention, by uplink/downlink antenna pulling away device, channel measuring method and system can be used in carrying out Measurement accuracy to the broad-band channel be distributed in multiple multiaerial systems of diverse geographic location under various communication environments simultaneously, thus can be further used for multi-dimensional channel feature extraction, channel capacity analysis, Channel Modeling and the network planning etc. by surveying the data obtained.Pass through embodiments of the invention, making can more flexibly, conveniently to the measurement of distributed channel, and, pass through embodiments of the invention, true wireless channel propagation environment can be reflected exactly, thus obtain the channel data (channel characteristics) of Cover treatment scope, different antennae array, thus provide reference and foundation for the transmission technology in wireless communication system, resource management and the network planning etc.
Claims (4)
1. comprise a transmitter for uplink/downlink antenna pulling away device, it is characterized in that, described transmitter comprises:
For the uplink/downlink antenna pulling away device of distributed multilink multiple antennas measuring bandwidth channel system, comprising:
Electrical to optical converter is light signal for the rf-signal modulation sent by the transmitter unit from distributed multilink multiple antennas measuring bandwidth channel system;
The optical fiber be connected with described electrical to optical converter, for transmitting the light signal after described electrical to optical converter modulation;
Antenna pulling away unit with described Fiber connection, comprising: with the optical-electrical converter of described Fiber connection, for receiving the light signal of described Optical Fiber Transmission, and is radiofrequency signal by described optical signal demodulation; The power amplifier be connected with described optical-electrical converter, for carrying out power amplification to the radiofrequency signal after described optical-electrical converter demodulation, thus determine the transmitted power of feed antenna, under meeting the certain condition of channel measurement system output gross power, the power of output port is configured, the actual area coverage of the measured community of expansion;
The master control set be connected with described uplink/downlink antenna pulling away device, for dispatching the switching time slot of each port, and Radio Resource managed and distributes, wherein, described port is the multiple ports be divided into according to the difference of channel measurement task by the aerial array of transmitter, each port arrangement has multiple antennas group, and is directly connected with described uplink/downlink antenna pulling away device.
2. based on a channel measuring method for the transmitter of claim 1, it is characterized in that, comprising:
The aerial array of described transmitter is divided into multiple port, and wherein, each described port arrangement has multiple antennas group, and described port is connected with described uplink/downlink antenna pulling away device;
By described optical fiber, by described antenna pulling away unit and described multiple antennas group as a whole, the position be geographically separated from each other with other antenna pulling away unit and the multiple antennas group entirety of described transmitter is zoomed out;
By described antenna pulling away unit and multiple antennas group, gather the real time channel impulse response data on diverse geographic location;
By the treatment and analysis to described real time channel impulse response data, obtain the multi-Dimensional parameters that can reflect distributed multilink wireless channel characteristics;
Wherein, before carrying out the measurements, uplink/downlink antenna pulling away device is calibrated, to eliminate the intrinsic system responses of measuring equipment, obtain complete wireless channel propagation characteristic.
3. a receiver for uplink antenna extension apparatus, is characterized in that, comprising:
For the uplink antenna extension apparatus of distributed multilink multiple antennas measuring bandwidth channel system, comprising:
Antenna pulling away unit, comprising: electrical to optical converter, for will be light signal from the rf-signal modulation received by described distributed multilink multiple antennas measuring bandwidth channel system; The low noise amplifier be connected with described electrical to optical converter, for amplifying the RF signal power from reception antenna feed-in, wherein, described radiofrequency signal is from the transmitter of described distributed multilink multiple antennas measuring bandwidth channel system, radiofrequency signal after amplifying is sent to described electrical to optical converter by described low noise amplifier, flexible configuration is carried out to receiving port, meets the SNR demand of each port distribution formula channel measurement Received signal strength;
The optical fiber be connected with described electrical to optical converter, for transmitting the light signal after described electrical to optical converter modulation;
With the optical-electrical converter of described Fiber connection, for receiving the light signal of described Optical Fiber Transmission, and be radiofrequency signal by described optical signal demodulation;
The master control set be connected with described uplink antenna extension apparatus, for dispatching the switching time slot of each port, and manages Radio Resource and distributes; Wherein, described port is the multiple ports be divided into according to the difference of channel measurement task by the aerial array of receiver, and each port arrangement has multiple antennas group, and is directly connected with described uplink antenna extension apparatus.
4. based on a channel measuring method for the receiver of claim 3, it is characterized in that, comprising:
The aerial array of described receiver is divided into multiple port, and wherein, each described port arrangement has multiple antennas group, and described port is connected with described uplink antenna extension apparatus;
By described optical fiber, by described antenna pulling away unit and described multiple antennas group as a whole, the position be geographically separated from each other with other antenna pulling away unit and the multiple antennas group entirety of described receiver is zoomed out;
By described antenna pulling away unit and multiple antennas group, gather the real time channel impulse response data on diverse geographic location;
By the treatment and analysis to described real time channel impulse response data, obtain the multi-Dimensional parameters that can reflect distributed multilink wireless channel characteristics;
Wherein, before carrying out the measurements, uplink antenna extension apparatus is calibrated, to eliminate the intrinsic system responses of measuring equipment, obtain complete wireless channel propagation characteristic.
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| CN201010240099.4A CN101924593B (en) | 2010-07-28 | 2010-07-28 | Uplink/downlink antenna pulling away device, transmitter, receiver and channel measuring method |
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| CN201010240099.4A CN101924593B (en) | 2010-07-28 | 2010-07-28 | Uplink/downlink antenna pulling away device, transmitter, receiver and channel measuring method |
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| CN103138848B (en) * | 2011-11-23 | 2015-01-21 | 中国科学院上海微系统与信息技术研究所 | System and method for measuring cooperation wireless channel |
| CN103684551B (en) * | 2012-08-31 | 2017-05-03 | 上海贝尔股份有限公司 | Distributed antenna and configuration manner thereof |
| CN103592625B (en) * | 2013-11-14 | 2015-12-09 | 中国电子科技集团公司第三十八研究所 | Based on the distributed Time-difference receiver system of photoelectric technology |
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