WO2012119565A1 - 通信信号传输方法及系统 - Google Patents

通信信号传输方法及系统 Download PDF

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Publication number
WO2012119565A1
WO2012119565A1 PCT/CN2012/072131 CN2012072131W WO2012119565A1 WO 2012119565 A1 WO2012119565 A1 WO 2012119565A1 CN 2012072131 W CN2012072131 W CN 2012072131W WO 2012119565 A1 WO2012119565 A1 WO 2012119565A1
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WO
WIPO (PCT)
Prior art keywords
wireless remote
baseband
uplink digital
remote units
digital signal
Prior art date
Application number
PCT/CN2012/072131
Other languages
English (en)
French (fr)
Inventor
姚国强
Original Assignee
华为技术有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP12755512.6A priority Critical patent/EP2667521A4/en
Publication of WO2012119565A1 publication Critical patent/WO2012119565A1/zh
Priority to US14/010,923 priority patent/US20130343332A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0825—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with main and with auxiliary or diversity antennas

Definitions

  • the present invention relates to the field of communications, and in particular, to a communication signal transmission method and system. Background technique
  • a base station is disposed along a high-speed railway, the base station includes at least two IRF (Medium Radio Frequency) units, and each IRF unit corresponds to a pair of primary and diversity antennas and a single site (such as: station A, station B, station C); after the mobile phone signal is filtered, amplified, mixed, analog-to-digital converted and digitally down-converted by the RF channel, the IRF unit outputs the uplink main diversity baseband data signal to the baseband unit.
  • IRF Medium Radio Frequency
  • the baseband unit performs 2-antenna diversity path calculation on the uplink baseband data signals of the two antennas output by the IRF unit to obtain combined baseband data.
  • the uplink receiving data of each carrier in the cell is calculated according to the data received by the two primary and diversity antennas of the single site, the uplink receiving signal of the base station is weak in anti-interference ability, and the uplink signal quality is higher in the cell coverage edge base station. Poor, the base station receives a high error and the user feels poor.
  • an embodiment of the present invention provides a communication signal transmission method, including:
  • the baseband unit receives the primary diversity baseband uplink digital signal output by the at least two wireless remote units, and the at least two wireless remote units are wireless remote units corresponding to different sites in the same cell;
  • Baseband processing is performed on the combined baseband uplink digital signal.
  • an embodiment of the present invention provides a wireless communication system, including: at least two wireless remote units and a baseband unit, where the at least two wireless remote units are located in the same cell, and each wireless remote unit corresponds to Different sites;
  • the at least two wireless remote units are respectively configured to receive a wireless signal, and output a primary diversity baseband uplink digital signal;
  • the baseband unit is configured to receive a primary diversity baseband uplink digital signal output by the at least two wireless remote units; and combine the primary diversity baseband uplink digital signals output by the at least two wireless remote units to obtain a combined calculation Combining the baseband with the uplink digital signal; performing baseband processing on the combined baseband uplink digital signal.
  • the uplink digital signal of the primary diversity baseband outputted by the wireless remote unit of at least two different sites is combined to obtain an uplink digital signal of the combined baseband, thereby improving The receiving performance of the base station improves the user experience.
  • FIG. 1 is a schematic diagram of networking of a communication signal transmission network in the prior art
  • 2 is a flowchart of a communication signal transmission method according to Embodiment 1 of the present invention
  • Embodiment 3 is a schematic diagram of networking of a communication signal transmission network in Embodiment 2 of the present invention.
  • FIG. 5 is a schematic diagram of receiving signals in a user moving process in another communication signal transmission method according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of networking of a communication signal transmission network in Embodiment 2 of the present invention.
  • Figure ⁇ is a flowchart of a communication signal transmission method in Embodiment 2 of the present invention.
  • Embodiment 8 is a flowchart of another communication signal transmission method in Embodiment 2 of the present invention.
  • Embodiment 9 is a schematic diagram of networking of a communication signal transmission network in Embodiment 3 of the present invention.
  • FIG. 10 is a flowchart of a communication signal transmission method according to Embodiment 3 of the present invention.
  • FIG. 1 is a schematic diagram of networking of a communication signal transmission network according to Embodiment 4 of the present invention.
  • FIG. 13 is a flowchart of a method for transmitting a communication signal according to Embodiment 4 of the present invention.
  • FIG. 15 is a schematic structural diagram of a wireless communication system according to Embodiment 5 of the present invention.
  • An embodiment of the present invention provides a method for transmitting a communication signal.
  • the method includes: 1 01.
  • a baseband unit receives a primary diversity baseband uplink digital signal output by at least two wireless remote units, and the at least two The wireless remote unit is a wireless remote unit corresponding to different sites in the same cell, where the cell includes at least two wireless remote units, each wireless remote unit corresponds to a different site and at least one pair of primary diversity
  • the antenna receives the wireless signal through the corresponding primary diversity antenna and outputs the primary diversity baseband uplink digital signal.
  • 102. Perform a combined calculation of the primary diversity baseband uplink digital signals output by the at least two wireless remote units to obtain a combined baseband uplink digital signal.
  • the method for performing the combined calculation of the primary diversity baseband uplink digital signals output by the at least two wireless remote units may be performed by any one of the prior art, which is not limited by the embodiment of the present invention.
  • the performing the baseband processing on the uplink digital signal of the combined baseband may be performed by using any one of the baseband processing methods in the prior art, which is not limited in the embodiment of the present invention, and the uplink digital signal is sent to the combined baseband.
  • the baseband processing may be, but not limited to, baseband processing such as demodulation, decoding, and the like.
  • the primary diversity baseband uplink digital signal outputted by the wireless remote unit of at least two different sites is combined to obtain an uplink digital signal of the combined baseband, thereby improving the base station. Receive performance and improve user experience.
  • Embodiments of the present invention provide a method for transmitting a communication signal.
  • the structure of a wireless communication network for transmitting the communication signal is as shown in FIG. 3, and a cell (baseband unit) provided by a user who is set to move at a high speed along the high-speed railway, and the cell is set.
  • the quantity can be determined according to the distance of the high-speed rail and the coverage of the cell, and at least two RRUs (Radio Remote Uni t) are set in each cell (as shown in the figure, four wireless remote units are set), each The wireless remote unit corresponds to different sites (such as station A, station site C, and site D), and corresponds to at least one pair of primary diversity antennas (as shown in the figure, each wireless remote unit corresponds to a pair
  • the main diversity antennas A1, A2, B1, B2, C1, C2, D1, D2) receive the wireless signal through the corresponding primary diversity antenna, and output the primary diversity baseband uplink digital signal; the at least two wireless remote units adopt stars Forming the connection with the baseband unit respectively; the baseband unit and the at least two wireless remote units forming a star-connected multi-site common cell Communications network.
  • a method for transmitting a communication signal is as shown in FIG. 4, and the method includes:
  • the baseband unit receives the primary diversity baseband uplink digital signal output by the at least two wireless remote units.
  • the quality of the primary diversity baseband uplink digital signal may be determined according to the signal-to-noise ratio and the magnitude of the signal.
  • the specific determination method may be any one of the prior art, which is not limited by the embodiment of the present invention.
  • the baseband uplink digital signal may be selected according to the computing capability of the baseband unit. For example, when the baseband unit uses the four-antenna diversity channel to implement the processing of the combined baseband uplink digital signal, the signal quality is in descending order. And selecting, from the main diversity baseband uplink digital signals output by the at least two wireless remote units, the primary diversity baseband uplink digital signals output by the two wireless remote units.
  • the primary diversity baseband uplink digital signal output by the two or more wireless remote units is dynamically selected according to the user's location information, including:
  • the wireless remote unit outputs a primary diversity baseband uplink digital signal.
  • the quality of the uplink signals received by the primary antennas A1, A2, and B1, B2 is the best, and the baseband units select Al, A2, and Bl.
  • B2 performs uplink antenna combining calculation, that is, the baseband unit receives the primary diversity baseband uplink digital signal output by the wireless remote unit 1 and the wireless remote unit 2; when the mobile user moves between the sites B and C, the primary antenna The quality of the uplink signals received by Bl, B2, Cl, and C2 is the best; the baseband unit selects Bl, B2, Cl, and C2 for uplink antenna combining calculation, that is, the baseband unit receives the output of the wireless remote unit 2 and the wireless remote unit 3.
  • the primary diversity baseband uplink digital signal as the mobile user moves, the baseband unit selects the primary diversity baseband uplink digital signal according to the above mode and so on, and the embodiment of the present invention will not be repeated here.
  • the primary diversity baseband uplink number output by the selected two or more wireless remote units may be performed by any one of the prior art, which is not limited by the embodiment of the present invention.
  • the performing the baseband processing on the uplink digital signal of the combined baseband may be performed by using any one of the baseband processing methods in the prior art, which is not limited in the embodiment of the present invention, and the uplink digital signal is sent to the combined baseband.
  • the baseband processing may be, but not limited to, baseband processing such as demodulation, decoding, and the like.
  • the primary diversity baseband uplink digital signal outputted by the wireless remote unit of at least two different sites is combined and processed.
  • the baseband carries the uplink digital signal, thereby improving the receiving performance of the base station, improving the user experience, and expanding the effective coverage of a cell to a certain extent; further, since the effective coverage of one cell is expanded, when the mobile user is in the high-speed rail
  • high-speed mobile in a cell including at least two different sites is set along the line, the cell switching is not required to be frequently performed, and the defect of data error caused by the frequent handover of the cell to the mobile user is avoided.
  • the primary diversity baseband uplink digital signal with better signal quality can be dynamically selected for combined calculation, and While reducing the computational complexity of the base station, the anti-interference of the base station is enhanced, and the user experience is improved.
  • Embodiments of the present invention provide a communication signal transmission method.
  • the structure of a wireless communication network for transmission of the communication signal is as shown in FIG. 6.
  • a cell baseband unit
  • a cell that is set to serve a high-speed mobile user along a high-speed railway, and the number of cells set therein is set.
  • at least two RRUs are set in each cell (as shown in the figure, four wireless remote units are set), and each wireless remote unit corresponds to a different site (as shown in the figure).
  • each wireless remote unit corresponds to a pair of main diversity antennas A1, A2, B1, B2 , C1, C2, D1, D2), receiving a wireless signal through the corresponding primary diversity antenna, and outputting a primary diversity baseband uplink digital signal;
  • the first wireless remote unit of the at least two wireless remote units is directly connected to the baseband unit
  • the first wireless remote unit may be the first wireless remote unit (as shown) or the last wireless remote unit (shown in the dotted line in the figure),
  • At least two radio remote units The wireless remote unit except the first wireless remote unit is connected to the first wireless remote unit by means of a cascade; the baseband unit and the at least two wireless remote units form a single-way cascading mode Multi-site shared cell wireless communication network.
  • a method for transmitting a communication signal is as shown in FIG. 7, and the method includes:
  • the baseband unit receives a primary diversity baseband uplink digital signal output by at least two wireless remote units transmitted by the first wireless remote unit.
  • the other wireless remote unit processes the received radio frequency signal to obtain a primary diversity baseband uplink.
  • a digital signal after obtaining the primary diversity baseband uplink digital signal, the next-stage wireless remote unit outputs the primary diversity baseband uplink digital signal to the upper-level wireless remote unit, so that the upper-level wireless remote unit performs the primary diversity baseband
  • the upstream digital signal is forwarded to the first wireless remote unit.
  • the method for performing the combined calculation of the primary diversity baseband uplink digital signals output by the at least two wireless remote units may be performed by any one of the prior art, which is not limited by the embodiment of the present invention.
  • the performing the baseband processing on the uplink digital signal of the combined baseband may be performed by using any one of the baseband processing methods in the prior art, which is not limited in the embodiment of the present invention, and the uplink digital signal is sent to the combined baseband.
  • the baseband processing may be, but not limited to, baseband processing such as demodulation, decoding, and the like.
  • the primary diversity baseband uplink digital signal output by the wireless remote unit of at least two different sites is combined and processed.
  • the uplink digital signal of the baseband is obtained, thereby improving the receiving performance of the base station, improving the user experience, and expanding the effective coverage of a cell to a certain extent; further, since the effective coverage of a cell is expanded, when the mobile user is When a high-speed mobile station is installed in a cell that includes at least two different sites along the high-speed rail, the cell switching is not required to be frequently performed, and the defect of data error caused by the frequent handover of the cell to the mobile user is avoided.
  • the embodiment of the invention further provides a method for transmitting a communication signal. As shown in FIG. 8, the method includes:
  • the baseband unit receives the primary diversity baseband uplink digital signal output by the at least two wireless remote units transmitted by the first wireless remote unit.
  • the other wireless remote unit processes the received radio frequency signal to obtain a primary diversity baseband uplink.
  • a digital signal after obtaining the primary diversity baseband uplink digital signal, the next-stage wireless remote unit outputs the primary diversity baseband uplink digital signal to the upper-level wireless remote unit, so that the upper-level wireless remote unit performs the primary diversity baseband
  • the upstream digital signal is forwarded to the first wireless remote unit.
  • the quality of the primary diversity baseband uplink digital signal may be determined according to the signal-to-noise ratio and the magnitude of the signal.
  • the specific determination method may be any one of the prior art, which is not limited in the embodiment of the present invention.
  • the baseband uplink digital signal may be selected according to the computing capability of the baseband unit. For example, when the baseband unit uses the four-antenna diversity channel to implement the processing of the combined baseband uplink digital signal, the signal quality is in descending order. And selecting, from the primary diversity baseband uplink digital signals sent by the at least two wireless remote units, the primary diversity baseband uplink digital signals output by the two wireless remote units.
  • the main diversity baseband uplink numbers output by the two or more wireless remote units are selected from the upper diversity baseband uplink digital signals sent by the at least two wireless remote units according to the signal quality from high to low.
  • the signal quality from high to low.
  • the method for performing the combined calculation of the primary diversity baseband uplink digital signals output by the at least two wireless remote units may be performed by any one of the prior art methods. Line limit.
  • the performing the baseband processing on the uplink digital signal of the combined baseband may be performed by using any one of the baseband processing methods in the prior art, which is not limited in the embodiment of the present invention, and the uplink digital signal is sent to the combined baseband.
  • the baseband processing may be, but not limited to, baseband processing such as demodulation, decoding, and the like.
  • the primary diversity baseband uplink digital signal output by the wireless remote unit of at least two different sites is combined and processed.
  • the uplink digital signal of the baseband is obtained, thereby improving the receiving performance of the base station, improving the user experience, and expanding the effective coverage of a cell to a certain extent; further, since the effective coverage of a cell is expanded, when the mobile user is When high-speed mobiles in a cell including at least two different sites are arranged along the high-speed rail, frequent inter-cell handover is not required, and the defect of data error caused by frequent handover of the cell to the mobile subscriber is avoided.
  • the primary diversity baseband uplink digital signal with better signal quality can be dynamically selected for combined calculation, which can be reduced. While calculating the complexity of the base station, the base station enhances the anti-interference of the base station and enhances the user experience. Moreover, the networking in the cascading manner in the embodiment of the present invention can reduce the cost of communication signal transmission.
  • the embodiment of the present invention provides a communication signal transmission method.
  • the structure of the wireless communication network for transmitting the communication signal is as shown in FIG. 9.
  • the cell baseband unit
  • the cell that is set to serve the user with high-speed mobility along the high-speed railway, and the number of the set cells is set.
  • at least two RRUs are set in each cell (as shown in the figure, four wireless remote units are set), and each wireless remote unit corresponds to a different site (as shown in the figure).
  • each wireless remote unit corresponds to a pair of main diversity antennas A1, A2, B1, B2 , C1, C2, D1, D2), receiving a wireless signal through the corresponding primary diversity antenna, and outputting a primary diversity baseband uplink digital signal;
  • the first wireless remote unit of the at least two wireless remote units is directly connected to the baseband unit
  • the second wireless remote unit of the at least two wireless remote units is also directly connected to the baseband unit, and the at least two wireless remote units are apart from the first wireless remote unit and
  • a method for transmitting a communication signal is as shown in FIG. 10, and the method includes:
  • the baseband unit receives a first primary diversity baseband uplink digital signal output by the at least one wireless remote unit transmitted by the first wireless remote unit, where the at least one wireless remote unit is other than the first wireless remote unit
  • the other wireless remote unit is connected to the first wireless remote unit by way of cascade.
  • the wireless remote unit that is cascaded with the first wireless remote unit after receiving the radio frequency signal through the primary diversity antenna, processes the radio frequency signal to obtain a first primary diversity baseband.
  • Upstream digital signal after obtaining the first primary diversity baseband uplink digital signal, outputting the first primary diversity baseband uplink digital signal to the upper-level wireless remote unit, so that the upper-level wireless remote unit will The primary diversity baseband uplink digital signal is output to the first wireless remote unit.
  • the baseband unit receives a second primary diversity baseband uplink digital signal output by the at least one wireless remote unit transmitted by the second wireless remote unit, where the at least one wireless remote unit is apart from the second wireless remote unit.
  • Other wireless remote units other than the unit are connected to the second wireless remote unit by way of cascade.
  • the wireless remote unit that is cascaded with the second wireless remote unit after receiving the radio frequency signal through the primary diversity antenna, processes the radio frequency signal to obtain a second primary diversity baseband.
  • Upstream digital signal after obtaining the second primary diversity baseband uplink digital signal, outputting the second primary diversity baseband uplink digital signal to the upper secondary wireless remote unit, so that the upper secondary wireless remote unit will The primary diversity baseband uplink digital signal is output to the second wireless remote unit.
  • the method may be implemented by using any one of the methods in the prior art. Make restrictions.
  • Perform baseband processing on the uplink digital signal of the combined baseband may be performed by using any one of the baseband processing methods in the prior art, which is not limited in the embodiment of the present invention, and the uplink digital signal is sent to the combined baseband.
  • the baseband processing may be, but not limited to, baseband processing such as demodulation, decoding, and the like.
  • the baseband unit when receiving the baseband uplink digital signal output by the at least two wireless remote units, the baseband unit may receive at least two from the first wireless remote unit, as described in steps 501 and 502 above.
  • the baseband uplink digital signal output by the wireless remote unit may also receive the baseband uplink digital signal output by the at least two wireless remote units only from the second wireless remote unit, which is not specifically limited in this embodiment of the present invention. In specific implementation, it is determined according to the signal quality of the user terminal.
  • the primary diversity baseband uplink digital signal outputted by the wireless remote unit of at least two different sites The combined processing is performed to obtain the uplink digital signal of the combined baseband, thereby improving the receiving performance of the base station, improving the user experience, and expanding the effective coverage of a cell to a certain extent; further, due to the effective coverage of a cell, When a mobile user moves at a high speed in a cell that includes at least two different sites along the high-speed rail, the cell switching does not need to be performed frequently, and the defect of data error caused by the frequent handover of the cell to the mobile user is avoided.
  • the embodiment of the present invention further provides a communication signal transmission method. As shown in FIG. 11, the method includes:
  • the baseband unit receives a first primary diversity baseband uplink digital signal output by the at least one wireless remote unit transmitted by the first wireless remote unit, where the at least one wireless remote unit is other than the first wireless remote unit.
  • the other wireless remote unit is connected to the first wireless remote unit by way of cascade.
  • the baseband unit receives a second primary diversity baseband uplink digital signal output by the at least one wireless remote unit transmitted by the second wireless remote unit, where the at least one wireless remote unit is apart from the second wireless remote unit.
  • Other wireless remote units other than the unit are connected to the second wireless remote unit by way of cascade.
  • the quality of the uplink diversity digital signal of the primary diversity baseband may be based on a signal to noise ratio and a signal amplitude.
  • the method for determining the size may be any one of the prior art, which is not limited by the embodiment of the present invention.
  • the baseband uplink digital signal may be selected according to the computing capability of the baseband unit. For example, when the baseband unit uses the four-antenna diversity channel to implement the processing of the combined baseband uplink digital signal, the signal quality is in descending order. And selecting, from the first primary diversity baseband uplink digital signal and the second primary diversity baseband uplink digital signal, the primary diversity baseband uplink digital signals output by the two wireless remote units.
  • the main diversity baseband uplink numbers output by the two or more wireless remote units are selected from the upper diversity baseband uplink digital signals sent by the at least two wireless remote units according to the signal quality from high to low.
  • the signal quality from high to low.
  • the method for performing the combined calculation of the primary diversity baseband uplink digital signals output by the at least two wireless remote units may be performed by any one of the prior art, which is not limited by the embodiment of the present invention.
  • the performing the baseband processing on the uplink digital signal of the combined baseband may be performed by using any one of the baseband processing methods in the prior art, which is not limited in the embodiment of the present invention, and the uplink digital signal is sent to the combined baseband.
  • the baseband processing may be, but not limited to, baseband processing such as demodulation, decoding, and the like.
  • the baseband unit when receiving the baseband uplink digital signals of the at least two wireless remote units, may receive at least two from the first wireless remote unit as described in steps 601 and 602 above.
  • the baseband uplink digital signal output by the wireless remote unit may also receive the baseband uplink digital signal output by the at least two wireless remote units only from the second wireless remote unit, which is not specifically limited in this embodiment of the present invention. When implemented, it is determined based on the signal quality of the user terminal.
  • the primary diversity baseband uplink digital signal outputted by the wireless remote unit of at least two different sites The combined processing is performed to obtain the uplink digital signal of the combined baseband, thereby improving the receiving performance of the base station, improving the user experience, and expanding the effective coverage of a cell to a certain extent; further, the effective coverage of a cell is expanded.
  • the primary diversity baseband uplink digital signal with better signal quality can be dynamically selected.
  • the combined calculation can enhance the anti-interference of the base station and improve the user experience while reducing the computational complexity of the base station.
  • the embodiment of the present invention provides a communication signal transmission method.
  • the structure of the wireless communication network for transmitting the communication signal is as shown in FIG. 12, and a cell (baseband unit) that is set to serve a high-speed mobile user along the high-speed railway, and the number of the set cells is set.
  • a cell baseband unit
  • the number of the set cells is set.
  • at least two RRUs are set in each cell (as shown in the figure, four wireless remote units are set), and each wireless remote unit corresponds to a different site (as shown in the figure).
  • each wireless remote unit corresponds to a pair of main diversity antennas A1, A2, B1, B2 , C1, C2, D1, D2), receiving a wireless signal through the corresponding primary diversity antenna, and outputting a primary diversity baseband uplink digital signal;
  • the at least two wireless remote units are connected by cascading, and are cascaded with each other
  • At least two wireless remote units are annularly connected to the baseband unit;
  • the baseband unit and the at least two wireless remote units are combined in a cascade and a ring hybrid manner Multi-site shared cell wireless communication network.
  • a method for transmitting a communication signal is as shown in FIG. 13, and the method includes:
  • the baseband unit receives the primary diversity baseband uplink digital signal output by the at least two wireless remote units. It is noted that, because the network is a network based on a cascade and a ring hybrid connection manner, the baseband unit receives at least two When the primary diversity baseband of the wireless remote unit is uplink digital signal, at least two wireless devices may be received from any one of the two wireless remote units connected to the baseband unit. The primary diversity baseband uplink digital signal outputted by the remote unit may also receive the primary diversity baseband uplink digital signal output by the at least one wireless remote unit from the two wireless remote units, which is not limited in this embodiment of the present invention. When implemented, it can be selected according to the user's settings.
  • the method for combining the primary diversity baseband uplink digital signals of the at least two wireless remote units may be performed by any one of the prior art, which is not limited by the embodiment of the present invention.
  • the performing the baseband processing on the uplink digital signal of the combined baseband may be performed by using any one of the baseband processing methods in the prior art, which is not limited in the embodiment of the present invention, and the uplink digital signal is sent to the combined baseband.
  • the baseband processing may be, but not limited to, baseband processing such as demodulation, decoding, and the like.
  • the primary diversity baseband uplink digital signal output by the wireless remote unit of at least two different sites is combined. Processing, obtaining the uplink digital signal of the baseband, thereby improving the receiving performance of the base station, improving the user experience, and expanding the effective coverage of a cell to some extent; further, because the effective coverage of a cell is expanded, when moving When a user moves at a high speed in a cell that includes at least two different sites along the high-speed rail, the user does not need to frequently perform cell handover, thereby avoiding the defect that data errors occur due to frequent handover of the cell to the mobile user.
  • the manner of the ring network in the embodiment of the present invention can improve the reliability of the multi-site common cell network.
  • the embodiment of the present invention further provides a communication signal transmission method. As shown in FIG. 14, the method includes:
  • the baseband unit receives the primary diversity baseband uplink digital signal output by the at least two wireless remote units. It is noted that, because the network is a network based on a cascade and a ring hybrid connection manner, the baseband unit receives at least two When the primary diversity baseband uplink digital signal of the wireless remote unit is received, the primary diversity baseband uplink digital signal output by the at least two wireless remote units may be received from any one of the two wireless remote units connected to the baseband unit.
  • the main diversity baseband uplink digital signal output by the at least one wireless remote unit may be separately received from the two wireless remote units, which is in the embodiment of the present invention. This is not limited. In specific implementation, it can be specifically selected according to the user's settings.
  • the quality of the primary diversity baseband uplink digital signal may be determined according to the signal-to-noise ratio and the magnitude of the signal.
  • the specific determination method may be any one of the prior art, which is not limited in the embodiment of the present invention.
  • the baseband uplink digital signal may be selected according to the computing capability of the baseband unit. For example, when the baseband unit uses the four-antenna diversity channel to implement the processing of the combined baseband uplink digital signal, the signal quality is in descending order. And selecting, from the main diversity baseband uplink digital signals output by the at least two wireless remote units, the primary diversity baseband uplink digital signals output by the two wireless remote units.
  • the main diversity baseband uplink numbers output by the two or more wireless remote units are selected from the upper diversity baseband uplink digital signals sent by the at least two wireless remote units according to the signal quality from high to low.
  • the signal quality from high to low.
  • the primary diversity baseband uplink digital signal output by the wireless remote unit of at least two different sites is combined. Processing, obtaining the uplink digital signal of the baseband, thereby improving the receiving performance of the base station, improving the user experience, and expanding the effective coverage of a cell to some extent; further, because the effective coverage of a cell is expanded, when moving When a user moves at a high speed in a cell that includes at least two different sites along the high-speed railway, frequent inter-cell handover is not required, and the defect of data error caused by frequent cell handover to the mobile user is avoided.
  • the primary diversity baseband uplink digital signal with better signal quality can be dynamically selected for combined calculation, which can reduce the computational complexity of the base station, enhance the anti-interference of the base station, and enhance the user experience.
  • the manner of the ring network in the embodiment of the present invention can improve the reliability of the multi-site common cell network.
  • the wireless communication system includes: at least two wireless remote units 91 and a baseband unit 92.
  • the at least two wireless remote units 91 are located in the same cell.
  • Each wireless remote unit corresponds to a different site and at least one pair of primary diversity antennas.
  • the at least two wireless remote units 91 are respectively configured to receive a wireless signal through a corresponding primary diversity antenna and output a primary diversity baseband uplink digital signal.
  • the baseband unit 92 is configured to receive a primary diversity baseband uplink digital signal output by the at least two wireless remote units 91; and combine the primary diversity baseband uplink digital signals output by the at least two wireless remote units 91 Calculating, obtaining a combined baseband uplink digital signal; and performing baseband processing on the combined baseband uplink digital signal.
  • the baseband unit 92 is further configured to: after receiving the primary diversity baseband uplink digital signal output by the at least two wireless remote units 91, Acquiring the quality of the primary diversity baseband uplink digital signal output by the at least two wireless remote units 91; the primary diversity baseband uplink digital signal output from the at least two wireless remote units in order of high to low signal quality
  • the main diversity baseband uplink digital signal output by the two or more wireless remote units is selected; and the main diversity baseband uplink digital signals output by the selected two or more wireless remote units are combined and calculated to obtain a combined road.
  • the quality of the primary diversity baseband uplink digital signal may be determined according to the signal-to-noise ratio and the magnitude of the signal.
  • the specific determination method may be any one of the prior art, which is not limited by the embodiment of the present invention.
  • the at least two wireless remote units are connected to the baseband unit, and may adopt any one of the following methods, including:
  • the first type, the at least two wireless remote units 91 are respectively connected to the baseband unit 92 in a star connection manner; as shown in FIG. 3, the corresponding description may refer to the corresponding description in Embodiment 2.
  • the first wireless remote unit of the at least two wireless remote units 91 is directly connected to the baseband unit 92, and the at least two wireless remote units 91 are apart from the first wireless remote unit.
  • the other wireless remote unit is connected to the first wireless remote unit by means of a cascading manner; as shown in FIG. 6 , the corresponding description may refer to the corresponding description in Embodiment 3, which is the embodiment of the present invention. It will not be repeated here.
  • the first wireless remote unit and the second wireless remote unit of the at least two wireless remote units 91 are directly connected to the baseband unit 92, respectively, except the first wireless remote unit and The other wireless remote units other than the second wireless remote unit are respectively connected to the first wireless remote unit or the second radio frequency in a cascade manner; as shown in FIG. 9 , the corresponding description may refer to The corresponding description in Embodiment 4 will not be repeated herein.
  • the at least two wireless remote units 91 are connected in a cascade manner, and at least two wireless remote units that are cascaded with each other are connected to the baseband unit 92 in a ring-connecting manner;
  • the baseband unit 92 in a ring-connecting manner;
  • the primary diversity baseband uplink digital signal outputted by the wireless remote unit of at least two different sites is combined to obtain an uplink digital signal of the combined baseband, thereby improving the base station.
  • the receiving performance improves the user experience; further, since the effective coverage of one cell is expanded, when the mobile user moves at a high speed in a cell including at least two different sites along the high-speed railway, frequent inter-cell handover is not required. The defect of data error caused by frequent handover between cells to mobile users is avoided.
  • the primary diversity baseband uplink digital signal with better signal quality can be dynamically selected for combined calculation, and While reducing the computational complexity of the base station, the anti-interference of the base station is enhanced, and the user experience is improved.
  • the technical solution provided by this embodiment can also be applied to the multi-site common cell design field of all wireless standard base stations.
  • the transmission medium is not limited to transmission media such as optical fibers, cables, and microwaves.
  • the networking mode is also not limited to the star, chain, ring, and hybrid networking modes mentioned in the present invention.
  • the technical solution provided by this embodiment can be applied to other high-speed railways as well as other high-speed railways. Speedy traffic routes, such as highways.
  • the present invention can be implemented by means of software plus necessary general hardware, and of course, by hardware, but in the case of more than 4, the former is better.
  • Implementation Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer.
  • a hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

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Description

通信信号传输方法及系统 本申请要求于 2011年 3月 9日提交中国专利局、 申请号为 201110057022. & 发明名称为"通信信号传输方法、 装置及系统"的中国专利申请的优先权， 其全部 内容通过引用结合在本申请中。
技术领域
本发明涉及通信领域， 尤其涉及一种通信信号传输方法及系统。 背景技术
随着社会经济的发展， 人们的工作和生活节奏越来越快， 为适应人们快节 奏工作和生活的需要， 全球范围内出现了各种快速交通解决方案， 其中高速铁 路是最具代表性的陆上快速交通。 高速铁路或高速公路在带给人们高效工作和 生活的同时， 也给移动通信带来了挑战。 受到快速移动过程中的频繁切换、 快 慢衰落、 多普勒效应、 车体材质对无线信号衰减等因素影响， 网络性能和用户 感受下降明显。
为适应移动用户的高速移动性， 目前移动通信采用以下方案为高速移动的 用户传输信号。 第一种， 如图 1 所示， 例如， 在高速铁路的沿线设置基站， 该 基站包含至少两个 IRF (中射频）单元， 每个 IRF单元对应一对主、 分集天线和 一个单站址（如： 站址 A、 站址 B、 站址 C ); 手机信号经过射频通道滤波、放大、 混频、 模数转换以及数字下变频后， 由 IRF单元输出上行主分集基带数据信号 给基带单元， 基带单元对 IRF单元输出的 2个天线的上行基带数据信号进行 2 天线分集合路计算， 得到合路基带数据。 该种方案由于小区中每一个载波的上 行接收数据是依据单站址的两根主、 分集天线接收的数据计算出来， 基站上行 接收信号抗干扰能力弱， 在小区覆盖边缘基站， 上行信号质量较差， 基站接收 误码高， 用户感受差。 发明内容 本发明的实施例提供一种通信信号传输方法及系统， 能够在扩大共小区基 站覆盖范围的同时提升基站的接收性能。
为达到上述目的， 本发明的实施例采用如下技术方案：
一方面， 本发明实施例提供一种通信信号传输方法， 包括：
基带单元接收至少两个无线拉远单元输出的主分集基带上行数字信号， 所 述至少两个无线拉远单元为同一个小区中不同站址对应的无线拉远单元；
将所述至少两个无线拉远单元输出的主分集基带上行数字信号进行合路计 算， 得到合路基带上行数字信号；
对所述合路基带上行数字信号进行基带处理。
另一方面， 本发明实施例提供一种无线通信系统， 包括： 至少两个无线拉 远单元和基带单元， 所述至少两个无线拉远单元位于同一个小区中，每个无线拉 远单元对应不同的站址；
所述至少两个无线拉远单元分别用于接收无线信号， 并输出主分集基带上 行数字信号；
所述基带单元， 用于接收所述至少两个无线拉远单元输出的主分集基带上 行数字信号； 将所述至少两个无线拉远单元输出的主分集基带上行数字信号进 行合路计算， 得到合路基带上行数字信号； 并对所述合路基带上行数字信号进 行基带处理。
本发明实施例提供的技术方案， 在一个小区中， 通过对至少两个不同站址 的无线拉远单元输出的主分集基带上行数字信号进行合路处理， 得到合路基带 上行数字信号， 从而提升了基站的接收性能， 改善了用户感受。 附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案， 下面将对实施 例或现有技术描述中所需要使用的附图作筒单地介绍， 显而易见地， 下面描述 中的附图仅仅是本发明的一些实施例， 对于本领域普通技术人员来讲， 在不付 出创造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1为现有技术中一种通信信号传输网络的组网示意图； 图 2为本发明实施例 1中一种通信信号传输方法的流程图；
图 3为本发明实施例 2中通信信号传输网络的组网示意图；
图 4为本发明实施例 1中一种通信信号传输方法的流程图；
图 5为本发明实施例 1 中另一种通信信号传输方法中用户移动过程中接收 信号的示意图；
图 6为本发明实施例 2中通信信号传输网络的组网示意图；
图 Ί为本发明实施例 2中一种通信信号传输方法的流程图；
图 8为本发明实施例 2中另一种通信信号传输方法的流程图；
图 9为本发明实施例 3中通信信号传输网络的组网示意图；
图 1 0为本发明实施例 3中一种通信信号传输方法的流程图；
图 1 1为本发明实施例 3中另一种通信信号传输方法的流程图；
图 1 2为本发明实施例 4中通信信号传输网络的组网示意图；
图 1 3为本发明实施例 4中一种通信信号传输方法的流程图；
图 14为本发明实施例 4中另一种通信信号传输方法的流程图；
图 1 5为本发明实施例 5中无线通信系统的组成结构示意图。
具体实施方式
下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案进行清 楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是 全部的实施例。 基于本发明中的实施例， 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。
实施例 1
本发明实施例提供一种通信信号传输的方法， 如图 2所示， 该方法包括： 1 01、 基带单元接收至少两个无线拉远单元输出的主分集基带上行数字信 号， 所述至少两个无线拉远单元为同一个小区中不同站址对应的无线拉远单元， 其中， 所述小区包含至少两个无线拉远单元， 每个无线拉远单元对应不同的站 址和至少一对主分集天线， 并通过对应的主分集天线接收无线信号， 并输出主 分集基带上行数字信号。 102、 将所述至少两个无线拉远单元输出的主分集基带上行数字信号进行合 路计算， 得到合路基带上行数字信号。
其中， 将所述至少两个无线拉远单元输出的主分集基带上行数字信号进行 合路计算的方法， 可以采用现有技术中的任一种方法， 本发明实施例对此不进 行限制。
103、 对所述合路基带上行数字信号进行基带处理。
其中， 所述对所述合路基带上行数字信号进行基带处理， 可以采用现有技 术中任一种基带处理方法进行， 本发明实施例对此不进行限制， 对所述合路基 带上行数字信号进行基带处理可以为但不局限于解调、 译码等基带处理。
本发明实施例中， 在一个小区中， 通过对至少两个不同站址的无线拉远单 元输出的主分集基带上行数字信号进行合路处理， 得到合路基带上行数字信号， 从而提升了基站的接收性能， 改善了用户感受。
实施例 2
本发明实施例提供一种通信信号传输的方法， 该通信信号传输的无线通信 网络构架如图 3 所示， 在高铁沿线设置为高速移动的用户提供服务的小区 （基 带单元）， 其设置小区的数量可以根据高铁的距离和小区的覆盖范围确定， 在每 个小区中设置至少两个 RRU ( Radio Remote Uni t , 无线拉远单元）（如图， 设置 了 4个无线拉远单元）， 每个无线拉远单元对应不同的站址（如图， 站址 A、 站 址 站址 C、 站址 D ), 并对应至少一对主分集天线（如图， 每个无线拉远单元 分别对应一对主分集天线 Al、 A2，B1、 B2，C1、 C2 , Dl、 D2 ), 通过对应的主分集 天线接收无线信号， 并输出主分集基带上行数字信号； 所述至少两个无线拉远 单元采用星形的方式分别与所述基带单元连接； 上述基带单元和至少两个无线 拉远单元组成了星形连接方式的多站址共小区的无线通信网络。 在该种无线通 信网络中， 通信信号传输的方法如图 4所示， 该方法包括：
201、 基带单元接收至少两个无线拉远单元输出的主分集基带上行数字信
202、 获取所述至少两个无线拉远单元输出的主分集基带上行数字信号的质 量。 其中， 所述主分集基带上行数字信号的质量可以根据信噪比、 信号幅度的 大小确定， 具体的确定方法可以采用现有技术中的任一种方法， 本发明实施例 对此不进行限制。
203、 按照信号质量从高到低的顺序， 从所述至少两个无线拉远单元输出的 主分集基带上行数字信号中， 选取两个以上的无线拉远单元输出的主分集基带 上行数字信号。
具体地， 可以根据所述基带单元的计算能力来选择基带上行数字信号， 例 如， 当基带单元采用四天线分集合路实现合路基带上行数字信号的处理时， 按 照信号质量从高到低的顺序， 从所述至少两个无线拉远单元输出的主分集基带 上行数字信号中， 选取两个无线拉远单元输出的主分集基带上行数字信号。
进一步的， 当移动用户高速移动时， 其所处的位置会发生变化， 每个站址 对应的主分天线接收的上行信号的质量会发生变化， 在选取信号质量较好的主 分集基带上行数字信号时， 会根据用户的位置信息， 动态的选取两个以上的无 线拉远单元输出的主分集基带上行数字信号， 具体包括：
获取用户在小区中的位置信息； 根据所述位置信息， 并按照信号质量从高 到低的顺序， 从所述至少两个无线拉远单元输出的主分集基带上行数字信号中， 选取两个以上的无线拉远单元输出的主分集基带上行数字信号。
例如， 如图 5所示， 当用户移动到站址 A和站址 B之间时， 主分天线 A1、 A2和 Bl、 B2接收的上行信号的质量最好， 基带单元选择 Al、 A2、 Bl、 B2进行 上行天线合路计算， 即基带单元接收无线拉远单元 1和无线拉远单元 2输出的 主分集基带上行数字信号； 当移动用户移动到站址 B与 C之间时， 主分天线 Bl、 B2和 Cl、 C2接收的上行信号的质量最好； 基带单元选择 Bl、 B2、 Cl、 C2进行 上行天线合路计算， 即基带单元接收无线拉远单元 2和无线拉远单元 3输出的 主分集基带上行数字信号； 随着移动用户的移动， 基带单元选取主分集基带上 行数字信号按照上述模式以此类推， 本发明实施例在此将不再——赘述。
204、 将所述选取的两个以上的无线拉远单元输出的主分集基带上行数字信 号进行合路计算， 得到合路基带上行数字信号。
其中， 将所述选取的两个以上的无线拉远单元输出的主分集基带上行数字 信号进行合路计算的方法， 可以采用现有技术中的任一种方法， 本发明实施例 对此不进行限制。
205、 对所述合路基带上行数字信号进行基带处理。
其中， 所述对所述合路基带上行数字信号进行基带处理， 可以采用现有技 术中任一种基带处理方法进行， 本发明实施例对此不进行限制， 对所述合路基 带上行数字信号进行基带处理可以为但不局限于解调、 译码等基带处理。
本发明实施例中， 在星形连接方式的多站址共小区的无线通信网络中， 通 过对至少两个不同站址的无线拉远单元输出的主分集基带上行数字信号进行合 路处理， 得到合路基带上行数字信号， 从而提高了基站的接收性能， 改善了用 户感受， 在一定程度上扩大了一个小区的有效覆盖范围； 进一步的， 由于一个 小区的有效覆盖范围扩大， 当移动用户在高铁沿线设置包含至少两个不同站址 的小区中高速移动时， 不需要频繁进行小区的切换， 避免了由于小区频繁切换 给移动用户带来数据误码的缺陷。
并且， 本发明实施例中， 在接收到至少两个无线拉远单元输出的主分集基 带上行数字信号后， 能够动态的选择信号质量较好的主分集基带上行数字信号 进行合路计算， 能够在减少基站计算复杂度的同时， 增强基站的抗干扰性， 提 升用户感受。
实施例 3
本发明实施例提供一种通信信号传输方法， 该通信信号传输的无线通信网 络构架如图 6 所示， 在高铁沿线设置为高速移动的用户提供服务的小区 （基带 单元）， 其设置小区的数量可以根据高铁的距离和小区的覆盖范围确定， 在每个 小区中设置至少两个 RRU (如图， 设置了 4个无线拉远单元）， 每个无线拉远单 元对应不同的站址（如图， 站址 A、 站址 B、 站址 C、 站址 D ), 并对应至少一对 主分集天线 （如图， 每个无线拉远单元分别对应一对主分集天线 Al、 A2，B1、 B2，C1、 C2 , Dl、 D2 ), 通过对应的主分集天线接收无线信号， 并输出主分集基 带上行数字信号； 该至少两个无线拉远单元中的第一无线拉远单元与基带单元 直接相连， 该第一无线拉远单元可以为第一个无线拉远单元（如图所示）， 也可 以为最后一个无线拉远单元（如图中虚线部分所示）， 该至少两个无线拉远单元 中除该第一无线拉远单元以外的其他无线拉远单元， 通过级联的方式与该第一 无线拉远单元连接； 上述基带单元和至少两个无线拉远单元组成了单路级联方 式的多站址共小区的无线通信网络。 在该种无线通信网络中， 通信信号传输的 方法如图 7所示， 该方法包括：
301、 基带单元接收由第一无线拉远单元传输的至少两个无线拉远单元输出 的主分集基带上行数字信号。
需要说明的是， 当该网络中除第一无线拉远单元外， 其他无线拉远单元在 通过主分集天线接收射频信号后， 都将所述接收到的射频信号进行处理， 得到 主分集基带上行数字信号； 在得到所述主分集基带上行数字信号后， 下一级无 线拉远单元向上一级无线拉远单元输出该主分集基带上行数字信号， 以便上级 无线拉远单元将所述主分集基带上行数字信号转发给所述第一无线拉远单元。
302、 将所述至少两个无线拉远单元的主分集基带上行数字信号进行合路计 算， 得到合路基带上行数字信号。
其中， 将所述至少两个无线拉远单元输出的主分集基带上行数字信号进行 合路计算的方法， 可以采用现有技术中的任一种方法， 本发明实施例对此不进 行限制。
303、 对所述合路基带上行数字信号进行基带处理。
其中， 所述对所述合路基带上行数字信号进行基带处理， 可以采用现有技 术中任一种基带处理方法进行， 本发明实施例对此不进行限制， 对所述合路基 带上行数字信号进行基带处理可以为但不局限于解调、 译码等基带处理。
本发明实施例中， 在单路级联方式的多站址共小区的无线通信网络中， 通 过对至少两个不同站址的无线拉远单元输出的主分集基带上行数字信号进行合 路处理， 得到合路基带上行数字信号， 从而提升了基站的接收性能， 改善了用 户感受， 在一定程度上扩大了一个小区的有效覆盖范围； 进一步的， 由于一个 小区的有效覆盖范围扩大， 当移动用户在高铁沿线设置包含至少两个不同的站 址的小区中高速移动时， 不需要频繁进行小区的切换， 避免了由于小区频繁切 换给移动用户带来数据误码的缺陷。
进一步的， 为了能够在减少基站计算复杂度的同时， 增强基站的抗干扰性， 本发明实施例还提供一种通信信号传输的方法， 如图 8所示， 该方法包括：
401、 基带单元接收由第一无线拉远单元传输的至少两个无线拉远单元输出 的主分集基带上行数字信号。
需要说明的是， 当该网络中除第一无线拉远单元外， 其他无线拉远单元在 通过主分集天线接收射频信号后， 都将所述接收到的射频信号进行处理， 得到 主分集基带上行数字信号； 在得到所述主分集基带上行数字信号后， 下一级无 线拉远单元向上一级无线拉远单元输出该主分集基带上行数字信号， 以便上级 无线拉远单元将所述主分集基带上行数字信号转发给所述第一无线拉远单元。
402、 获取所述至少两个无线拉远单元输出的主分集基带上行数字信号的质 量。
其中， 所述主分集基带上行数字信号的质量可以根据信噪比、 信号幅度的 大小确定， 具体的确定方法可以采用现有技术中的任一种方法， 本发明实施例 对此不进行限制。
403、 按照信号质量从高到低的顺序， 从所述至少两个无线拉远单元输出的 主分集基带上行数字信号中， 选取两个以上的无线拉远单元输出的主分集基带 上行数字信号。
具体地， 可以根据所述基带单元的计算能力来选择基带上行数字信号， 例 如， 当基带单元采用四天线分集合路实现合路基带上行数字信号的处理时， 按 照信号质量从高到低的顺序， 从所述至少两个无线拉远单元发的主分集基带上 行数字信号中， 选取两个无线拉远单元输出的主分集基带上行数字信号。
其中， 所述按照信号质量从高到低的顺序， 从所述至少两个无线拉远单元 发的主分集基带上行数字信号中， 选取两个以上的无线拉远单元输出的主分集 基带上行数字信号的具体描述， 可以参考实施例 1中的步骤 203中的相应描述， 本发明实施例此处将不再赘述。
404、 将所述选取的两个以上的无线拉远单元输出的主分集基带上行数字信 号进行合路计算， 得到合路基带上行数字信号。
其中， 将所述至少两个无线拉远单元输出的主分集基带上行数字信号进行 合路计算的方法， 可以采用现有技术中的任一种方法， 本发明实施例对此不进 行限制。
405、 对所述合路基带上行数字信号进行基带处理。
其中， 所述对所述合路基带上行数字信号进行基带处理， 可以采用现有技 术中任一种基带处理方法进行， 本发明实施例对此不进行限制， 对所述合路基 带上行数字信号进行基带处理可以为但不局限于解调、 译码等基带处理。
本发明实施例中， 在单路级联方式的多站址共小区的无线通信网络中， 通 过对至少两个不同站址的无线拉远单元输出的主分集基带上行数字信号进行合 路处理， 得到合路基带上行数字信号， 从而提升了基站的接收性能， 改善了用 户感受， 在一定程度上扩大了一个小区的有效覆盖范围； 进一步的， 由于一个 小区的有效覆盖范围扩大， 当移动用户在高铁沿线设置包含至少两个不同的站 址的小区中高速移动时， 不需要频繁进行小区间的切换， 避免了由于小区频繁 切换给移动用户带来数据误码的缺陷。
并且， 本发明实施例中， 在接收到至少两个无线拉远单元的主分集基带上 行数字信号后， 能够动态的选择信号质量较好的主分集基带上行数字信号进行 合路计算， 能够在减少基站计算复杂度的同时， 增强基站的抗干扰性， 提升用 户感受。 并且， 本发明实施例中采用级联的方式组网， 能够降低通信信号传输 的成本。
实施例 4
本发明实施例提供一种通信信号传输方法， 该通信信号传输的无线通信网 络构架如图 9 所示， 在高铁沿线设置为高速移动的用户提供服务的小区 （基带 单元）， 其设置小区的数量可以根据高铁的距离和小区的覆盖范围确定， 在每个 小区中设置至少两个 RRU (如图， 设置了 4个无线拉远单元）， 每个无线拉远单 元对应不同的站址（如图， 站址 A、 站址 B、 站址 C、 站址 D ), 并对应至少一对 主分集天线 （如图， 每个无线拉远单元分别对应一对主分集天线 Al、 A2，B1、 B2，C1、 C2 , Dl、 D2 ), 通过对应的主分集天线接收无线信号， 并输出主分集基 带上行数字信号； 该至少两个无线拉远单元中的第一无线拉远单元与基带单元 直接相连， 该至少两个无线拉远单元中的第二无线拉远单元也与基带单元直接 相连， 该至少两个无线拉远单元中除所述第一无线拉远单元和所述第二无线拉 远单元以外的其他无线拉远单元， 通过级联的方式与所述第一无线拉远单元或 所述第二无线拉远单元连接； 上述基带单元和至少两个无线拉远单元组成了两 路级联和星形混合连接方式的多站址共小区的无线通信网络。 在该种无线通信 网络中， 通信信号传输的方法如图 10所示， 该方法包括：
501、 基带单元接收由第一无线拉远单元传输的至少一个无线拉远单元输出 的第一主分集基带上行数字信号， 所述至少一个无线拉远单元中除所述第一无 线拉远单元以外的其他无线拉远单元， 通过级联的方式与所述第一无线拉远单 元连接。
其中， 需要说明的是， 与所述第一无线拉远单元相级联的无线拉远单元， 其在通过主分集天线接收射频信号后， 对所述射频信号进行处理， 得到第一主 分集基带上行数字信号； 在得到所述第一主分集基带上行数字信号后， 向其上 一级无线拉远单元输出所述第一主分集基带上行数字信号， 以便上一级无线拉 远单元将所述主分集基带上行数字信号输出给所述第一无线拉远单元。
502、 所述基带单元接收由第二无线拉远单元传输的至少一个无线拉远单元 输出的第二主分集基带上行数字信号， 所述至少一个无线拉远单元中除所述第 二无线拉远单元以外的其他无线拉远单元， 通过级联的方式与所述第二无线拉 远单元连接。
其中， 需要说明的是， 与所述第二无线拉远单元相级联的无线拉远单元， 其在通过主分集天线接收射频信号后， 对所述射频信号进行处理， 得到第二主 分集基带上行数字信号； 在得到所述第二主分集基带上行数字信号后， 向其上 二级无线拉远单元输出所述第二主分集基带上行数字信号， 以便上二级无线拉 远单元将所述主分集基带上行数字信号输出给所述第二无线拉远单元。
503、 将所述第一主分集基带上行数字信号和所述第二主分集基带上行数字 信号进行合路计算， 得到合路基带上行数字信号。
其中， 将所述第一主分集基带上行数字信号和所述第二主分集基带上行数 字信号进行合路计算时， 可以采用现有技术中的任一种方法实现， 本发明实施 例对此不进行限制。
504、 对所述合路基带上行数字信号进行基带处理。 其中， 所述对所述合路基带上行数字信号进行基带处理， 可以采用现有技 术中任一种基带处理方法进行， 本发明实施例对此不进行限制， 对所述合路基 带上行数字信号进行基带处理可以为但不局限于解调、 译码等基带处理。
需要说明的是， 基带单元在接收至少两个无线拉远单元输出的基带上行数 字信号时， 可以如上述步骤 501和步骤 502 中所述， 也可以仅从第一无线拉远 单元中接收至少两个无线拉远单元输出的基带上行数字信号， 还可以仅从第二 无线拉远单元中接收至少两个无线拉远单元输出的基带上行数字信号， 本发明 实施例对此不进行具体的限制， 具体实施时， 根据用户终端的信号质量确定。
本发明实施例中， 在两路级联和星形混合连接方式的多站址共小区的无线 通信网络中， 通过对至少两个不同站址的无线拉远单元输出的主分集基带上行 数字信号进行合路处理， 得到合路基带上行数字信号， 从而提升了基站接收性 能， 改善了用户感受， 在一定程度上扩大了一个小区的有效覆盖范围； 进一步 的， 由于一个小区的有效覆盖范围扩大， 当移动用户在高铁沿线设置包含至少 两个不同的站址的小区中高速移动时， 不需要频繁进行小区的切换， 避免了由 于小区频繁切换给移动用户带来数据误码的缺陷。
进一步的， 为了能够在减少基站计算复杂度的同时， 增强基站的抗干扰性， 本发明实施例还提供一种通信信号传输方法， 如图 11所示， 该方法包括：
601、 基带单元接收由第一无线拉远单元传输的至少一个无线拉远单元输出 的第一主分集基带上行数字信号， 所述至少一个无线拉远单元中除所述第一无 线拉远单元以外的其他无线拉远单元， 通过级联的方式与所述第一无线拉远单 元连接。
602、 所述基带单元接收由第二无线拉远单元传输的至少一个无线拉远单元 输出的第二主分集基带上行数字信号， 所述至少一个无线拉远单元中除所述第 二无线拉远单元以外的其他无线拉远单元， 通过级联的方式与所述第二无线拉 远单元连接。
603、 获取所述第一主分集基带上行数字信号和所述第二主分集基带上行数 字信号的质量。
其中， 所述主分集基带上行数字信号的质量可以根据信噪比、 信号幅度的 大小确定， 具体的确定方法可以采用现有技术中的任一种方法， 本发明实施例 对此不进行限制。
604、 按照信号质量从高到低的顺序， 从所述第一主分集基带上行数字信号 和所述第二主分集基带上行数字信号中， 选取两个以上的无线拉远单元输出的 主分集基带上行数字信号。
具体地， 可以根据所述基带单元的计算能力来选择基带上行数字信号， 例 如， 当基带单元采用四天线分集合路实现合路基带上行数字信号的处理时， 按 照信号质量从高到低的顺序， 从所述第一主分集基带上行数字信号和所述第二 主分集基带上行数字信号中， 选取两个无线拉远单元输出的主分集基带上行数 字信号。
其中， 所述按照信号质量从高到低的顺序， 从所述至少两个无线拉远单元 发的主分集基带上行数字信号中， 选取两个以上的无线拉远单元输出的主分集 基带上行数字信号的具体描述， 可以参考实施例 1中的步骤 203中的相应描述， 本发明实施例此处将不再赘述。
605、 将所述选取的两个以上的无线拉远单元输出的主分集基带上行数字信 号进行合路计算， 得到合路基带上行数字信号。
其中， 将所述至少两个无线拉远单元输出的主分集基带上行数字信号进行 合路计算的方法， 可以采用现有技术中的任一种方法， 本发明实施例对此不进 行限制。
606、 对所述合路基带上行数字信号进行基带处理。
其中， 所述对所述合路基带上行数字信号进行基带处理， 可以采用现有技 术中任一种基带处理方法进行， 本发明实施例对此不进行限制， 对所述合路基 带上行数字信号进行基带处理可以为但不局限于解调、 译码等基带处理。
需要说明的是， 基带单元在接收至少两个无线拉远单元的基带上行数字信 号时， 可以如上述步骤 601和步骤 602 中所述， 也可以仅从第一无线拉远单元 中接收至少两个无线拉远单元输出的基带上行数字信号， 还可以仅从第二无线 拉远单元中接收至少两个无线拉远单元输出的基带上行数字信号， 本发明实施 例对此不进行具体的限制， 具体实施时， 根据用户终端的信号质量确定。 本发明实施例中， 在两路级联和星形混合连接方式的多站址共小区的无线 通信网络中， 通过对至少两个不同站址的无线拉远单元输出的主分集基带上行 数字信号进行合路处理， 得到合路基带上行数字信号， 从而提升了基站的接收 性能， 改善了用户感受， 在一定程度上扩大了一个小区的有效覆盖范围； 进一 步的， 由于一个小区的有效覆盖范围扩大， 当移动用户在高铁沿线设置包含至 少两个不同的站址的小区中高速移动时， 不需要频繁进行小区间的切换， 避免 了由于频繁小区切换给移动用户带来数据误码的缺陷。
并且， 本发明实施例中， 在接收到所述第一主分集基带上行数字信号和所 述第二主分集基带上行数字信号后， 能够动态的选择信号质量较好的主分集基 带上行数字信号进行合路计算， 能够在减少基站计算复杂度的同时， 增强基站 的抗干扰性， 提升用户感受。
实施例 5
本发明实施例提供一种通信信号传输方法， 该通信信号传输的无线通信网 络构架如图 12所示， 在高铁沿线设置为高速移动的用户提供服务的小区 （基带 单元）， 其设置小区的数量可以根据高铁的距离和小区的覆盖范围确定， 在每个 小区中设置至少两个 RRU (如图， 设置了 4个无线拉远单元）， 每个无线拉远单 元对应不同的站址（如图， 站址 A、 站址 B、 站址 C、 站址 D ), 并对应至少一对 主分集天线 （如图， 每个无线拉远单元分别对应一对主分集天线 Al、 A2，B1、 B2，C1、 C2 , Dl、 D2 ), 通过对应的主分集天线接收无线信号， 并输出主分集基 带上行数字信号； 该至少两个无线拉远单元之间通过级联的方式连接， 相互级 联的至少两个无线拉远单元与该基带单元环形连接； 上述基带单元和至少两个 无线拉远单元组成了级联和环形混合连接方式的多站址共小区的无线通信网 络。 在该种无线通信网络中， 通信信号传输的方法如图 13所示， 该方法包括：
701、 基带单元接收至少两个无线拉远单元输出的主分集基带上行数字信 其中， 需要说明的是， 由于该网络是基于级联和环形混合连接方式的网络， 所述基带单元接收至少两个无线拉远单元的主分集基带上行数字信号时， 可以 从与所述基带单元相连接的两个无线拉远单元中的任一个处接收至少两个无线 拉远单元输出的主分集基带上行数字信号， 也可以从两个无线拉远单元中分别 接收至少一个无线拉远单元输出的主分集基带上行数字信号， 本发明实施例对 此不进行限制， 具体实施时， 可以根据用户的设置具体选择。
702、 将所述至少两个无线拉远单元输出的主分集基带上行数字信号进行合 路计算， 得到合路基带上行数字信号。
其中， 将所述至少两个无线拉远单元的主分集基带上行数字信号进行合路 计算， 可以采用现有技术中的任一方法， 本发明实施例对此不进行限制。
703、 对所述合路基带上行数字信号进行基带处理。
其中， 所述对所述合路基带上行数字信号进行基带处理， 可以采用现有技 术中任一种基带处理方法进行， 本发明实施例对此不进行限制， 对所述合路基 带上行数字信号进行基带处理可以为但不局限于解调、 译码等基带处理。
本发明实施例中， 在级联和环形混合连接方式的多站址共小区的无线通信 网络中， 通过对至少两个不同站址的无线拉远单元输出的主分集基带上行数字 信号进行合路处理， 得到合路基带上行数字信号， 从而提升了基站的接收性能， 改善了用户感受， 在一定程度上扩大了一个小区的有效覆盖范围； 进一步的， 由于一个小区的有效覆盖范围扩大， 当移动用户在高铁沿线设置包含至少两个 不同的站址的小区中高速移动时， 不需要频繁进行小区的切换， 避免了由于小 区频繁切换给移动用户带来数据误码的缺陷。 并且， 本发明实施例中环形组网 的方式可以提升多站址共小区网络的可靠性。
进一步的， 为了能够在减少基站计算复杂度的同时， 增强基站的抗干扰性， 本发明实施例还提供一种通信信号传输方法， 如图 14所示， 该方法包括：
801、 基带单元接收至少两个无线拉远单元输出的主分集基带上行数字信 其中， 需要说明的是， 由于该网络是基于级联和环形混合连接方式的网络， 所述基带单元接收至少两个无线拉远单元的主分集基带上行数字信号时， 可以 从与所述基带单元相连接的两个无线拉远单元中的任一个处接收至少两个无线 拉远单元输出的主分集基带上行数字信号， 也可以从两个无线拉远单元中分别 接收至少一个无线拉远单元输出的主分集基带上行数字信号， 本发明实施例对 此不进行限制， 具体实施时， 可以根据用户的设置具体选择。
802、 获取所述至少两个无线拉远单元输出的主分集基带上行数字信号的质 量。
其中， 所述主分集基带上行数字信号的质量可以根据信噪比、 信号幅度的 大小确定， 具体的确定方法可以采用现有技术中的任一种方法， 本发明实施例 对此不进行限制。
803、 按照信号质量从高到低的顺序， 从所述至少两个无线拉远单元的主分 集基带上行数字信号中， 选取两个以上的无线拉远单元输出的主分集基带上行 数字信号。
具体地， 可以根据所述基带单元的计算能力来选择基带上行数字信号， 例 如， 当基带单元采用四天线分集合路实现合路基带上行数字信号的处理时， 按 照信号质量从高到低的顺序， 从所述至少两个无线拉远单元输出的主分集基带 上行数字信号中， 选取两个无线拉远单元输出的主分集基带上行数字信号。
其中， 所述按照信号质量从高到低的顺序， 从所述至少两个无线拉远单元 发的主分集基带上行数字信号中， 选取两个以上的无线拉远单元输出的主分集 基带上行数字信号的具体描述， 可以参考实施例 1中的步骤 303中的相应描述， 本发明实施例此处将不再赘述。
804、 将所述选取的两个以上的无线拉远单元输出的主分集基带上行数字信 号进行合路计算， 得到合路基带上行数字信号。
805、 对所述合路基带上行数字信号进行基带处理。
本发明实施例中， 在级联和环形混合连接方式的多站址共小区的无线通信 网络中， 通过对至少两个不同站址的无线拉远单元输出的主分集基带上行数字 信号进行合路处理， 得到合路基带上行数字信号， 从而提升了基站的接收性能， 改善了用户感受， 在一定程度上扩大了一个小区的有效覆盖范围； 进一步的， 由于一个小区的有效覆盖范围扩大， 当移动用户在高铁沿线设置包含至少两个 不同的站址的小区中高速移动时， 不需要频繁进行小区间的切换， 避免了由于 频繁小区切换给移动用户带来数据误码的缺陷。
并且， 本发明实施例中， 在接收到至少两个无线拉远单元的主分集基带上 行数字信号后， 能够动态的选择信号质量较好的主分集基带上行数字信号进行 合路计算， 能够在减少基站计算复杂度的同时， 增强基站的抗干扰性， 提升用 户感受。 并且， 本发明实施例中环形组网的方式可以提升多站址共小区网络的 可靠性。
实施例 6
本发明实施例提供一种无线通信系统，如图 15所示，该无线通信系统包括： 至少两个无线拉远单元 91和基带单元 92 , 所述至少两个无线拉远单元 91位于 同一个小区中，每个无线拉远单元对应不同的站址和至少一对主分集天线。
所述至少两个无线拉远单元 91分别用于通过对应的主分集天线接收无线信 号， 并输出主分集基带上行数字信号。
所述基带单元 92 ,用于接收所述至少两个无线拉远单元 91输出的主分集基 带上行数字信号； 将所述至少两个无线拉远单元 91输出的主分集基带上行数字 信号进行合路计算， 得到合路基带上行数字信号； 并对所述合路基带上行数字 信号进行基带处理。
进一步的， 为了能够在减少基站计算复杂度的同时， 增强基站的抗干扰性， 所述基带单元 92还用于， 在接收至少两个无线拉远单元 91输出的主分集基带 上行数字信号之后， 获取所述至少两个无线拉远单元 91输出的主分集基带上行 数字信号的质量； 按照信号质量从高到低的顺序， 从所述至少两个无线拉远单 元输出的主分集基带上行数字信号中， 选取两个以上的无线拉远单元输出的主 分集基带上行数字信号； 并将所述选取的两个以上的无线拉远单元输出的主分 集基带上行数字信号进行合路计算， 得到合路基带上行数字信号。 其中， 所述 主分集基带上行数字信号的质量可以根据信噪比、 信号幅度的大小确定， 具体 的确定方法可以采用现有技术中的任一种方法， 本发明实施例对此不进行限制。
其中， 所述至少两个无线拉远单元与所述基带单元连接， 可以采用以下方 式中的任一种， 包括：
第一种， 所述至少两个无线拉远单元 91以星形的连接方式， 分别与所述基 带单元 92连接；具体如图 3所示，相应的描述可以参考实施例 2中的相应描述， 第二种， 所述至少两个无线拉远单元 91中的第一无线拉远单元与所述基带 单元 92直连， 所述至少两个无线拉远单元 91 中除所述第一无线拉远单元以外 的其他无线拉远单元， 通过级联的方式与所述第一无线拉远单元连接； 具体如 图 6所示， 相应的描述可以参考实施例 3中的相应描述， 本发明实施例此处将 不再赘述。
第三种， 所述至少两个无线拉远单元 91中的第一无线拉远单元和第二无线 拉远单元， 分别与所述基带单元 92直连， 除所述第一无线拉远单元和第二无线 拉远单元以外的其他无线拉远单元， 以级联的方式分别与所述第一无线拉远单 元或所述第二射频单连接； 具体如图 9所示， 相应的描述可以参考实施例 4 中 的相应描述， 本发明实施例此处将不再赘述。
第四种， 所述至少两个无线拉远单元 91之间通过级联的方式连接， 相互级 联的至少两个无线拉远单元与所述基带单元 92以环形连接的方式连接； 具体如 图 12所示， 相应的描述可以参考实施例 5中的相应描述， 本发明实施例此处将 不再赘述。
本发明实施例中， 在一个小区中， 通过对至少两个不同站址的无线拉远单 元输出的主分集基带上行数字信号进行合路处理， 得到合路基带上行数字信号， 从而提升了基站的接收性能， 改善了用户感受； 进一步的， 由于一个小区的有 效覆盖范围扩大， 当移动用户在高铁沿线设置包含至少两个不同的站址的小区 中高速移动时， 不需要频繁进行小区间的切换， 避免了由于小区间频繁切换给 移动用户带来数据误码的缺陷。
并且， 本发明实施例中， 在接收到至少两个无线拉远单元输出的主分集基 带上行数字信号后， 能够动态的选择信号质量较好的主分集基带上行数字信号 进行合路计算， 能够在减少基站计算复杂度的同时， 增强基站的抗干扰性， 提 升用户感受。
需要说明的是， 本实施例提供的技术方案还可应用到所有无线制式基站的 多站址共小区设计领域。 传输介质不限于光纤、 电缆和微波等传输介质。 组网 方式也不限于本发明提及的星形、 链型、 环形， 以及这几种形式的混合组网方 式。 本实施例提供的技术方案除可以应用于高速铁路外， 还可以应用于其他高 速交通路线， 例如高速公路等。
通过以上的实施方式的描述， 所属领域的技术人员可以清楚地了解到本发 明可借助软件加必需的通用硬件的方式来实现， 当然也可以通过硬件， 但 4艮多 情况下前者是更佳的实施方式。 基于这样的理解， 本发明的技术方案本质上或 者说对现有技术做出贡献的部分可以以软件产品的形式体现出来， 该计算机软 件产品存储在可读取的存储介质中， 如计算机的软盘， 硬盘或光盘等， 包括若 干指令用以使得一台计算机设备（可以是个人计算机， 服务器， 或者网络设备 等）执行本发明各个实施例所述的方法。
以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并不局限于 此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内， 可轻易想到 变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护范围应 以所述权利要求的保护范围为准。

Claims

权利要求书
1、 一种通信信号传输方法， 其特征在于， 包括：
基带单元接收至少两个无线拉远单元输出的主分集基带上行数字信号， 所 述至少两个无线拉远单元为同一个小区中不同站址对应的无线拉远单元；
将所述至少两个无线拉远单元输出的主分集基带上行数字信号进行合路计 算， 得到合路基带上行数字信号；
对所述合路基带上行数字信号进行基带处理。
2、 根据权利要求 1所述的方法， 其特征在于， 在基带单元接收至少两个无 线拉远单元输出的主分集基带上行数字信号之后， 还包括：
获取所述至少两个无线拉远单元输出的主分集基带上行数字信号的信号质 量；
按照信号质量从高到低的顺序， 从所述至少两个无线拉远单元输出的主分 集基带上行数字信号中， 选取至少两个无线拉远单元输出的主分集基带上行数 字信号；
所述将所述至少两个无线拉远单元输出的主分集基带上行数字信号进行合 路计算， 得到合路基带上行数字信号包括： 将按照信号质量从高到低的顺序选 取的所述至少两个无线拉远单元输出的主分集基带上行数字信号进行合路计 算， 得到合路基带上行数字信号。
3、 根据权利要求 1所述的方法， 其特征在于， 在基带单元接收至少两个无 线拉远单元输出的主分集基带上行数字信号之后， 还包括：
获取用户在小区中的位置信息， 以及所述至少两个无线拉远单元输出的主 分集基带上行数字信号的信号质量；
根据所述位置信息， 并按照信号质量从高到低的顺序， 从所述至少两个无 线拉远单元输出的主分集基带上行数字信号中， 选取至少两个无线拉远单元输 出的主分集基带上行数字信号。
4、 根据权利要求 1所述的方法， 其特征在于， 所述至少两个无线拉远单元 中的每个无线拉远单元对应至少一对主分集天线， 所述主分集基带上行数字信 号为所述主分集天线输出的信号。
5、 根据权利要求 2或 3或 4所述的方法， 其特征在于， 将所述选取的至少 两个无线拉远单元输出的主分集基带上行数字信号进行合路计算之前， 还包括： 将所述选取的至少两个无线拉远单元输出的主分集基带上行数字信号进行 抗干扰处理。
6、 根据权利要求 2或 3所述的方法， 其特征在于， 所述主分集基带上行数 字信号的信号质量根据信噪比或者信号幅度的大小确定。
7、 一种无线通信系统， 其特征在于， 包括： 基带单元和至少两个无线拉远 单元， 所述至少两个无线拉远单元位于同一个小区中 ,每个无线拉远单元对应不 同的站址；
所述至少两个无线拉远单元分别用于接收无线信号， 并输出主分集基带上 行数字信号；
所述基带单元， 用于接收所述至少两个无线拉远单元输出的主分集基带上 行数字信号； 将所述至少两个无线拉远单元输出的主分集基带上行数字信号进 行合路计算， 得到合路基带上行数字信号； 并对所述合路基带上行数字信号进 行基带处理。
8、 根据权利要求 7所述的系统， 其特征在于， 所述基带单元还用于， 在接 收至少两个无线拉远单元输出的主分集基带上行数字信号之后， 获取所述至少 两个无线拉远单元输出的主分集基带上行数字信号的信号质量； 按照信号质量 从高到低的顺序， 从所述至少两个无线拉远单元输出的主分集基带上行数字信 号中， 选取至少两个无线拉远单元输出的主分集基带上行数字信号； 并将所述 选取的至少两个无线拉远单元输出的主分集基带上行数字信号进行合路计算， 得到合路基带上行数字信号。
9、 根据权利要求 7所述的系统， 其特征在于， 所述基带单元还用于， 在接 收至少两个无线拉远单元输出的主分集基带上行数字信号之后， 获取用户在小 区中的位置信息， 以及所述至少两个无线拉远单元输出的主分集基带上行数字 信号的信号质量； 根据所述位置信息， 并按照信号质量从高到低的顺序， 从所 述至少两个无线拉远单元输出的主分集基带上行数字信号中， 选取至少两个无 线拉远单元输出的主分集基带上行数字信号。
1 0、 根据权利要求 7 所述的系统， 其特征在于， 所述无线通信系统还包括 至少两对分集天线， 所述至少两个无线拉远单元中的每个无线拉远单元对应至 少一对主分集天线。
1 1、 根据权利要求 7到 10中任意一项所述的系统， 其特征在于， 所述基带 单元还用于， 在将所述选取的两个以上的无线拉远单元输出的主分集基带上行 数字信号进行合路计算之前， 将所述选取的至少两个无线拉远单元输出的主分 集基带上行数字信号进行抗干扰处理。
12、 根据权利要求 7到 10中任意一项所述的系统， 其特征在于，
所述至少两个无线拉远单元以星形的连接方式， 分别与所述基带单元连接； 或者
所述至少两个无线拉远单元中的第一无线拉远单元与所述基带单元直连， 所述至少两个无线拉远单元中除所述第一无线拉远单元以外的其他无线拉远单 元， 通过级联的方式与所述第一无线拉远单元连接； 或者
所述至少两个无线拉远单元中的第一无线拉远单元和第二无线拉远单元分 别与所述基带单元直连， 所述至少两个无线拉远单元中除所述第一无线拉远单 元和第二无线拉远单元以外的其他无线拉远单元以级联的方式， 分别与所述第 一无线拉远单元或所述第二射频单连接； 或者
所述至少两个无线拉远单元之间通过级联的方式连接， 所述相互级联的至 少两个无线拉远单元与所述基带单元以环形连接的方式连接。
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