WO2017114159A1 - 双工滤波装置、rru系统及无线射频系统 - Google Patents

双工滤波装置、rru系统及无线射频系统 Download PDF

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Publication number
WO2017114159A1
WO2017114159A1 PCT/CN2016/109945 CN2016109945W WO2017114159A1 WO 2017114159 A1 WO2017114159 A1 WO 2017114159A1 CN 2016109945 W CN2016109945 W CN 2016109945W WO 2017114159 A1 WO2017114159 A1 WO 2017114159A1
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Prior art keywords
frequency band
filter
rru
ant
port
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PCT/CN2016/109945
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English (en)
French (fr)
Inventor
康玉龙
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP16880949.9A priority Critical patent/EP3399651B1/en
Priority to DK16880949.9T priority patent/DK3399651T3/da
Publication of WO2017114159A1 publication Critical patent/WO2017114159A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits

Definitions

  • the present invention relates to the field of radio frequency, and in particular to a duplex filtering device, an RRU system, and a radio frequency system.
  • the duplex filter radio frequency device comprises a primary transmit filter and a receive filter to form a primary receive and transmit duplexer, and a single filter constitutes a diversity receive filter.
  • the transmit filter and the receive filter of the duplexer are composed of a metal coaxial cavity.
  • the transmit filter and receive filter of the commonly used duplex filter RF device are generally used.
  • the device has a plurality of metal resonators.
  • FIG. 1 is a schematic diagram of a duplex filter and a system networking structure thereof in the related art, as shown in FIG. 1 , including two radio remote units (Radio Remote Units, RRUs for short), four inter-frequency combiners, and one A four-port antenna and a plurality of RF cables are formed, wherein the RRU is composed of four modules: an intermediate frequency module, a transceiver module, a power amplifier, and a filtering module; the digital intermediate frequency module is configured to perform optical transmission modulation and demodulation, digital up-down conversion, and A /D conversion; the transceiver module completes the conversion of the intermediate frequency signal to the radio frequency signal; and then passes the power amplifier and the filtering module to transmit the radio frequency signal through the antenna port; the RRU downlinks the baseband signal by frequency conversion, filtering, and after radio frequency filtering, The linear power amplifier is then passed through the transmit filter to the antenna feed.
  • RRU Radio Remote Units
  • the uplink signal of the mobile terminal is filtered, low noise amplification, further RF small signal amplification filter and down-conversion, and then analog-to-digital conversion and digital intermediate frequency processing are performed; the system has a complicated network structure and an excessive number of cables.
  • the increase in engineering components, reliability and cost are not conducive to the expansion and upgrade of operators' networks.
  • the embodiments of the present invention provide a duplex filtering device, an RRU system, and a radio frequency system, so as to at least solve the problem that the duplex filter and its system networking structure are complicated and the number of cables is too large.
  • a duplex filtering apparatus comprising at least one filtering unit, wherein the filtering unit comprises: a receiving filter, a transmitting filter, a transceiver combiner, a common interface ANT, the ANT includes a first ANT and a second ANT; one end of the transceiver combiner and one end of a first set of filters consisting of at least one of the receive filter and the transmit filter respectively a first ANT connection; the other end of the transceiver combiner and one end of a second set of filters consisting of at least one of the receive filter and the transmit filter are respectively connected to the second ANT, wherein The first ANT and the second ANT are connected to an external interface unit; the receiving filter in the first group of filters and the second group of filters is connected to the radio remote unit RRU through the input port RX; The first set of filters and the transmit filter of the second set of filters are coupled to the RRU via an output port TX.
  • the filtering unit comprises: a receiving filter, a transmitting filter, a transce
  • the first set of filters includes a first receive filter and a first transmit filter
  • the second set of filters includes a second receive filter and a second transmit filter
  • the first receive filter The first transmit filter and the ANT common end of the transceiver combiner are respectively connected to the first ANT
  • the first receive filter passes through RX
  • the first transmit filter passes through TX and The RRU connection
  • the ANT common end of the transceiver multiplexer, the second receiving filter, and the ANT common end of the second transmit filter are respectively connected to the second ANT
  • a second receive filter is coupled to the RRU through TX through RX and the second transmit filter.
  • a frequency band of the first receiving filter and the second receiving filter is a first frequency band
  • a frequency band of the first transmitting filter and the second transmitting filter is a second frequency band
  • the first frequency band is different from the frequency band of the second frequency band
  • the frequency band of the transceiver combiner is the third frequency band, wherein the third frequency band and the frequency band of the first frequency band and the second frequency band Different.
  • the frequency band of the first frequency band and the second frequency band is 1800 MHz, and the frequency band of the third frequency band is 2100 MHz; or the frequency band of the first frequency band and the second frequency band is 2100 MHz, The frequency band of the third frequency band is 1800 MHz.
  • an RRU system comprising: a radio remote unit RRU and the duplex filtering device according to any one of the above; the duplex filtering device passes an output port RX And the input port TX is connected to the radio remote unit RRU.
  • the duplex filtering device extends the RX of the receiving filter and the TX of the transmitting filter in each filtering unit respectively. Unit RRU connection.
  • a radio frequency system comprising: an antenna unit and at least two RRU systems according to any one of the above; the common interface ANT of the RRU system passes the radio frequency line A cable is connected to a port of the antenna unit.
  • the RRU system includes a first RRU system and a second RRU system
  • the antenna unit is an N port and the public interface ANT is 2N
  • the first antenna of the N port antenna unit The port is connected to the first ANT port in the first RRU system by the radio frequency cable; the second ANT port of the first RRU system is connected to the 2N-1 ANT port of the second RRU system through the radio frequency cable
  • the second N-1 ANT port in the first RRU system is connected to the second ANT port in the second RRU system by a radio frequency cable; the 2Nth ANT in the first RRU system
  • the port, the first ANT port and the 2Nth ANT port of the second RRU system are respectively connected to the port of the N port antenna unit through a radio frequency cable; wherein the N is greater than or equal to 2 natural numbers.
  • the RRU system includes: a radio remote unit RRU and the duplex filtering device according to any one of claims 1 to 4; wherein, when there is only one filtering unit in the duplex filtering device, The radio remote unit RRU is respectively connected to the RX of the first receiving filter and the second receiving filter in the duplex filtering device, and the RX of the first transmitting filter and the second transmitting filter Or, when there are a plurality of the filtering units in the duplex filtering device, the radio remote unit RRU and the first receiving filter and the second receiving filter of the plurality of duplex filtering devices RX of the device, and RX connection of the first transmit filter and the second transmit filter.
  • a frequency band of the first receiving filter and the second receiving filter is a first frequency band
  • a frequency band of the first transmitting filter and the second transmitting filter is a second frequency band
  • the first frequency band is different from the frequency band of the second frequency band
  • the frequency band of the transceiver combiner is the third frequency band, wherein the third frequency band and the frequency band of the first frequency band and the second frequency band Different.
  • the frequency band of the first frequency band and the second frequency band of the duplex filtering device in the first RRU system is 2100 MHz, and the frequency band of the third frequency band is 1800 MHz;
  • the frequency band of the first frequency band and the second frequency band of the filtering device is 1800 MHz, and the frequency band of the third frequency band is 2100 MHz; or the first frequency band of the duplex filtering device in the first RRU system
  • the frequency band of the second frequency band is 1800 MHz, and the frequency band of the third frequency band is 2100 MHz; and the frequency band of the first frequency band and the second frequency band of the duplex filtering device in the second RRU system is 2100 MHz,
  • the frequency band of the third frequency band is 1800 MHz.
  • one end of the transceiver combiner and one end of the first group of filters consisting of at least one receive filter and a transmit filter are respectively connected to the ANT; the other end of the transceiver combiner is received by at least one One end of the second set of filters consisting of a filter and a transmit filter is respectively connected to the ANT, wherein the ANT is connected to the external interface unit; the receive filter in the first set of filters and the second set of filters is passed through the input port RX and The radio remote unit RRU is connected; the first group of filters and the second group of filters are connected to the RRU through the output port TX.
  • the embodiment of the present invention solves the problem that the duplex filter and the system of the system of the related art are complicated in structure and the number of cables is too large.
  • FIG. 1 is a schematic diagram of a duplexing filter and a system networking structure thereof in the related art
  • FIG. 2 is a block diagram showing the structure of a duplex filtering apparatus according to an embodiment of the present invention
  • FIG. 3 is a structural block diagram of an RRU system in accordance with an alternative embodiment of the present invention.
  • FIG. 4 is a structural block diagram of an antenna radio frequency system according to an embodiment of the present invention.
  • FIG. 5 is a structural block diagram of a duplex filter according to an alternative embodiment of the present invention.
  • FIG. 6 is a block diagram of a duplex filter system in accordance with an alternative embodiment of the present invention.
  • FIG. 7 is a block diagram showing a networking structure of a 4-port antenna unit system according to an alternative embodiment of the present invention.
  • FIG. 8 is a block diagram showing a networking structure of a 2-port antenna unit system according to an alternative embodiment of the present invention.
  • FIG. 9 is a block diagram of a network architecture of an n-port antenna unit system according to an alternative embodiment of the present invention.
  • FIG. 10 is a system block diagram of a specific embodiment of a duplex filter in accordance with an alternative embodiment of the present invention.
  • FIG. 11 is a structural block diagram of a 2*4T4R networking architecture implemented by a duplex filter according to an alternative embodiment of the present invention.
  • FIG. 2 is a structural block diagram of a duplex filtering device according to an embodiment of the present invention.
  • the duplex filtering device 200 includes at least one filtering unit 210.
  • the filtering unit includes: a receiving filter 211, a transmitting filter 212, a transceiver combiner 213, a common interface ANT214, and the ANT includes a first ANT214-1 and a second ANT214-2;
  • One end of the transceiver combiner 213 and one end of the first set of filters consisting of at least one receive filter 211 and transmit filter 212 are respectively connected to the first ANT 214-1;
  • the other end of the transceiver combiner 213 and one end of a second set of filters consisting of at least one receive filter 211 and a transmit filter 212 are respectively coupled to a second ANT 214-2, wherein the first ANT 214-1 and the second ANT214-2 is connected to the external interface unit;
  • a first set of filters and a receive filter 211 of the second set of filters are coupled to the remote radio unit RRU via an input port RX;
  • the first set of filters and the transmit filter 212 of the second set of filters are coupled to the RRU via an output port TX.
  • the first group of filters in this embodiment includes a first receive filter and a first transmit filter
  • the second set of filters includes a second receive filter and a second transmit filter
  • the first receiving filter, the first transmitting filter, and the ANT common end of the transceiver combiner are respectively connected to the first ANT; the first receiving filter is connected to the RRU through the RX and the first transmitting filter through the TX; The other ANT common end of the combiner, the second receive filter and the ANT common end of the second transmit filter are respectively connected to the second ANT; the second receive filter passes through the RX, and the second transmit filter passes through the TX and RRU connection.
  • the frequency bands of the first receiving filter and the second receiving filter are the first frequency band, and the frequency bands of the first transmitting filter and the second transmitting filter are In the second frequency band, the frequency bands of the first frequency band and the second frequency band are different; the frequency band of the transmitting and receiving combiner is the third frequency band, wherein the third frequency band is different from the frequency bands of the first frequency band and the second frequency band.
  • the frequency band involved in the filter in this embodiment may be that the frequency band of the first frequency band and the second frequency band is 1800 MHz, and the frequency band of the third frequency band is 2100 MHz; or the frequency bands of the first frequency band and the second frequency band. It is 2100MHz, and the frequency band of the third frequency band is 1800MHz.
  • the value of the frequency band of the filter in the foregoing embodiment is merely an example and does not limit the present invention. In other application scenarios of the present invention, the value of the frequency band may be determined according to actual conditions.
  • the RRU system 300 includes: a radio remote unit RRU 310 and a duplex filter device 200 of FIG. 2, wherein the duplex The filtering device 200 is connected to the radio remote unit RRU310 through the output port RX and the input port TX, and is connected to the external interface through the ANT 214.
  • a filtering unit is taken as an example to illustrate the connection relationship between the filtering device 200 and the radio remote unit RRU310.
  • the duplex filtering device passes each filtering unit.
  • the RX of the receiving filter and the TX of the transmitting filter are respectively connected to the radio remote unit RRU, and are connected to the external interface unit through the ANT214.
  • FIG. 4 is a structural block diagram of an antenna radio frequency system according to an embodiment of the present invention.
  • the antenna radio frequency system includes: an antenna unit 400 and at least two RRU systems 300 in FIG. 3, wherein the RRU system 300
  • the common interface ANT214 is connected to the port of the antenna unit through a radio frequency cable.
  • FIG. 4 is an example in which only one filtering unit in the filtering device is taken as an example.
  • the first antenna port of the N port antenna unit is connected to the radio frequency cable.
  • the first ANT port in the first RRU system; the second ANT port of the first RRU system is connected to the 2N-1 ANT port of the second RRU system by a radio frequency cable; the first in the first RRU system 2N-1 ANT ports are connected to the second ANT port in the second RRU system through the radio frequency cable; respectively, the 2Nth ANT port in the first RRU system, the first ANT port in the second RRU system, and the first The 2N ANT ports are respectively connected to the ports of the N-port antenna unit by radio frequency cables; wherein N is 2 or more natural numbers.
  • the RRU system 300 further includes: a radio remote unit RRU 310 and the duplex filter device 200 of FIG. 2;
  • the radio remote unit RRU and the RX of the first receiving filter and the second receiving filter in the duplex filtering device, and the first transmitting filter and the second transmitting filter respectively RX connection of the device; or, when there are multiple filtering units in the duplex filtering device, the RX of the first receiving filter and the second receiving filter of the radio remote unit RRU and the plurality of duplex filtering devices, and the An RX connection of a transmit filter and a second transmit filter.
  • the duplex filtering device, the radio remote unit RRU and the antenna are used for networking, the number of antennas used and the number of radio frequency cables used in the wireless network can be reduced, so that the engineering installation is performed. Simple, low maintenance costs.
  • An alternative embodiment of the present invention discloses a duplex filter and a network architecture thereof, the duplex filter including a plurality of receive filters, a plurality of transmit filters, a plurality of common antenna ANT ports, a TX interface, and an RX interface.
  • the optional embodiment further provides a plurality of networking architectures based on the duplex filter.
  • the duplex filter may be composed of multiple units, where the first unit connection relationship is as follows. :
  • ANT1 is connected to one end of Filter1, Filter2, and Filter3; the other ends of Filter1 and Filter2 are connected to the RRU RF processing unit, and the other end of Filter3 is connected to ANT2; Filter1, Filter2, and Filter3 are filters of three different frequency bands;
  • ANT2 is connected to one end of Filter3, Filter4, and Filter5; the other end of Filter3 is connected to ANT1, and the other ends of Filter4 and Filter5 are connected to RRU RF processing unit; Filter3, Filter4, and Filter5 are filters of three different frequency bands;
  • Filter1 and Filter4 respectively correspond to the first transmit filter and the second filter in the foregoing embodiment
  • Filter2 and Filter5 correspond to the first receive filter and the second receive filter in the foregoing embodiment
  • Filter 3 corresponds to the transceiver combiner in the above embodiment.
  • the second unit connection relationship of the duplex filter is as follows:
  • ANT3 is connected to one end of Filter6, Filter7 and Filter8; Filter6, Filter7 and the other end TX3, RX3 are connected to the RRU RF processing unit, and the other end of Filter8 is connected to ANT4; Filter6, Filter7 and Filter8 are filters of three different frequency bands;
  • ANT4 is connected to one end of Filter8, Filter9 and Filter10; the other end of Filter8 is connected to ANT4, and the other ends of Filter9 and Filter10 are connected to RRU RF processing unit; Filter8, Filter9 and Filter10 are filters of three different frequency bands;
  • Filter1 and Filter9 respectively correspond to the first transmit filter and the second filter in the foregoing embodiment
  • Filter7 and Filter10 correspond to the first receive filter and the second receive filter in the foregoing embodiment
  • Filter 8 corresponds to the transceiver combiner in the above embodiment.
  • connection relationship of the nth unit may be:
  • ANT2n-1 is connected to one end of Filter5n-4, Filter5n-3, Filter5n-2; Filter5n-4, Filter5n-3 the other end TX2n-1, RX2n-1 is connected to the RRU RF processing unit, and the other end of Filter5n-2 is connected to ANT2n; Filter5n-4, Filter5n-3, and Filter5n-2 are filters of three different frequency bands;
  • ANT2n is connected to one end of Filter5n-2, Filter5n-1, Filter5n; Filter5n-1, Filter5n the other end TX2n, RX2n is connected to the RRU RF processing unit, and the other end of Filter5n-2 is connected to ANT2n-1; Filter5n-2, Filter5n-1, Filter5n is a filter of three different frequency bands;
  • FIG. 6 is a block diagram of a duplex filter system according to an alternative embodiment of the present invention.
  • a connection structure of a 2-port antenna unit is as follows: 1 port of a 2-port antenna unit passes The RF cable is connected to the duplexer ANT1 port, and the other port 2 is connected to the duplexer ANT4 port through the RF cable.
  • the ANT2 is connected by the RF cable to the ANT2 of the second RRU;
  • the ANT3 is connected by a radio frequency cable to the ANT1 of the second RRU; thereby forming a parallel network composed of 2-port antennas;
  • FIG. 7 is a block diagram of a 4-port antenna unit system networking structure according to an alternative embodiment of the present invention.
  • the network connection relationship is: antenna port 1 in a 4-port antenna unit is connected to a radio frequency cable.
  • the first RRU system duplexer ANT2 is connected to the second RRU system duplexer ANT3 port through the radio frequency cable; likewise, the first RRU system duplexer ANT3 passes The RF cable is connected to the ANT2 port of the second RRU system duplexer; the first RRU system duplexer ANT4 and the second RRU system duplexer ANT1 and ANT4 are respectively connected to the antenna port 2 by using an RF cable.
  • a parallel network consisting of 4-port antennas is formed on the 3rd and 4th.
  • FIG. 8 is an alternative embodiment according to the present invention.
  • 2 port antenna unit system networking architecture block diagram as shown in Figure 8, the first ANT in the first RRU system is connected to the first port of the 2-port antenna unit, and the second ANT in the first RRU system is connected to the first The first ANT in the second RRU system, and the second ANT in the second RRU system is connected to the second port of the 2-port antenna unit.
  • FIG. 9 is a block diagram of an n-port antenna unit system networking structure according to an alternative embodiment of the present invention.
  • the networking connection relationship is The antenna port 1 in the n-port antenna unit is connected to the first RRU system duplexer ANT1 port by the radio frequency cable, and the first RRU system duplexer ANT2 is connected to the second RRU system duplex through the radio frequency cable.
  • the first RRU system duplexer ANT2n-1 is connected to the second RRU system duplexer ANT2 port through a radio frequency cable; the first RRU system duplexer ANT2n, The second RRU system duplexers ANT1 and ANT2n are respectively connected to the antenna ports by radio frequency cables to form a parallel network composed of n-port antennas;
  • the process of receiving signals by the duplex filter in the alternative embodiment may be: after the spatial wireless signal is received by the antenna, the radio frequency cable is transmitted to the first RRU filter ANT1 public terminal.
  • One signal is filtered by Filter2 (receiving filter) and sent by RX to the first RRU RF processing unit;
  • the other signal of the common terminal of ANT1 is filtered by Filter3 (transceiver combiner) and transmitted to the second RRU via RF cable.
  • Filter3 transmitter combiner
  • the wireless signal received at the nth antenna port is sent to the common end of the first RRU filter ANT2n, one signal is filtered by Filter5n and then sent by RX2n to the first RRU radio frequency processing unit; the other signal of the ANT2n common end is filtered. -2 filtered and transmitted to the second RRU ANT2 common end via the RF cable, filtered by Filter5 and sent by RX2 to the second RRU RF processing unit;
  • the first RRU RF processing unit After the first RRU RF processing unit transmits the signal through the TX1 interface, it is filtered by the filter Filter1 and transmitted to the antenna unit via the RF cable; the TX2 transmission signal is filtered by the filter Filter4 and transmitted to the ANT2n-1 common end through the RF cable. After being combined by Filter5n-2 to the ANT2n public port, it is transmitted to the antenna unit through the RF cable;
  • the nth transmit signal TX2n-1 is filtered by the filter Filter5n-4 and transmitted to the second RRU system ANT2 common terminal through the RF cable, and then combined to the ANT1 public port via the second RRU system Filter3. Passing through the RF cable to the antenna unit;
  • the optional embodiment provides a duplex filter of two different frequency bands of 1800 MHz and 2100 MHz
  • FIG. 10 is according to the present invention.
  • connection relationship of the 1800MHz duplex filter is one end of the antenna interface ANT1 connected to one 1800MHz transmit filter (TX1), one 1800MHz receive filter (RX1), and one 2-way 2100MHz wideband combiner (TRX); TX1, RX1 One end is connected to the RRU RF processing unit, and the other end of the 2100MHz wideband combiner (TRX) is connected to the ANT2; the 1800MHz transmit filter (TX1), the 1800MHz receive filter (RX1), and the 2100MHz wideband combiner (TRX) are three different types.
  • the ANT2 is connected to one 1800MHz transmit filter (TX2), one 1800MHz receive filter (RX2), one end of a 2100MHz wideband combiner (TRX); 2100MHz wideband combiner (TRX) The other end is connected to ANT1, TX2 and RX2 are connected to the RRU RF processing unit; the 1800MHz transmit filter (TX1), the 1800MHz receive filter (RX1), and the 2100MHz wideband combiner (TRX) are filters of three different frequency bands;
  • ANT3, ANT4 and 1800MHz transmit filter, 1800MHz receive filter, 2100MHz wideband combiner (TRX) interconnection are the same as ANT1, ANT2 above, and will not be repeated;
  • the 2100M duplex filter in the alternative embodiment has the same internal structure as the above 1800M duplexer filter, and the difference is the change of the working frequency band of the filter.
  • the optional embodiment further provides a 4-port antenna supporting 2*4T4R network architecture composed of two orthogonal filters of 1800 MHz and 2100 MHz
  • FIG. 11 is a duplex filter implementing 2*4T4R group according to an alternative embodiment of the present invention.
  • the structural block diagram of the network architecture, as shown in FIG. 11, the connection relationship of the 2*4T4R network architecture is: 4-port antenna unit, wherein the antenna port 1 is connected by radio frequency cable to the ANT1 port of the RRU system composed of the 1800 MHz duplexer, 1800 MHz.
  • the RRU system duplexer ANT2 is connected to the 2100MHz RRU system duplexer ANT3 port through the RF cable.
  • the 1800MHz RRU system duplexer ANT3 is connected to the 2100MHz RRU system duplexer ANT2 port through the RF cable;
  • 1800MHz RRU system duplexer ANT4, 2100MHz RRU system duplexer ANT1 and ANT4 are respectively connected to the antenna port by RF cable to form a 2*4T4R parallel cabinet network composed of 4-port antenna feed;
  • the flow of the duplex filter in the 2*4T4R network architecture in the alternative embodiment is as follows:
  • the spatial wireless signal After the spatial wireless signal is received by the antenna, it is transmitted by the radio frequency cable to the ANT1 common end of the 1800MHz RRU system filter, and then one signal is filtered by the 1800MHz receiving filter (RX1) and sent to the 1800MHz RRU RF processing unit; the 1800MHz RRU system ANT1 public
  • the other signal of the terminal is filtered by the 1800MHz RRU combiner (TRX) and transmitted to the AN3 common end of the 2100MHz RRU system via the RF cable, and then filtered by the 2100MHz RRU system receiving filter (RX3) and sent to the 2100MHz RRU RF processing unit;
  • the wireless signal received by the second antenna port is sent to the ANT terminal of the 1800MHz RRU receiving filter ANT4, one signal is filtered by the 1800MHz receiving filter (RX4) and sent to the 1800MHz RRU RF processing unit; the other signal is passed through the 1800MHz RRU.
  • the combiner (2100MHz/TRX) is filtered and transmitted to the 2100MHz RRU ANT2 common terminal via the RF cable, and then filtered by RX2 and sent by RX2 to the 2100MHz RRU RF processing unit;
  • the 1800MHz RRU RF processing unit transmits the signal through the 1800MHz transmit filter (TX1) and then transmits it to the antenna unit via the ANT1 via the RF cable.
  • the 1800MHz RRU 2nd transmit signal is filtered by the 1800MHz RRU transmit filter (TX2) and transmitted through the RF cable.
  • TX1 the 1800MHz transmit filter
  • TX2 the 1800MHz RRU transmit filter
  • the device (TX3) is filtered and transmitted to the 2100MHz RRU ANT2 common terminal through the RF cable, and then combined to the 2100MHz RRU ANT1 common port via the 2100MHz RRU combiner (1800MHz/TRX), and then transmitted to the antenna unit through the RF cable; 1800MHz
  • the RRU 4th channel transmission signal is filtered by the 1800MHz RRU transmission filter (TX4) and transmitted to the antenna unit through the RF cable;
  • a duplex filtering device, an RRU system, and a radio frequency system provided by the embodiments of the present invention have the following beneficial effects: one end of the transceiver combiner and the first one composed of at least one receiving filter and a transmitting filter.
  • One end of the group filter is respectively connected to the ANT; the other end of the transceiver combiner and one end of the second group of filters consisting of at least one receiving filter and a transmitting filter are respectively connected to the ANT, wherein the ANT is connected to the external interface unit
  • the first set of filters and the receive filter of the second set of filters are coupled to the remote radio unit RRU via the input port RX; the transmit filters of the first set of filters and the second set of filters are outputted via the output port TX RRU connection.

Abstract

一种双工滤波装置、RRU系统及无线射频系统，其中，该双工滤波装置包括至少一个滤波单元，收发合路器的一端和与由至少一个接收滤波器和发射滤波器组成的第一组滤波器的一端分别与第一ANT连接；收发合路器的另一端与和由至少一个接收滤波器和发射滤波器组成的第二组滤波器的一端分别与第二ANT连接，其中，ANT与外部接口单元连接；并通过ANT与外部接口单元连接；第一组滤波器和第二组滤波器中的接收滤波器通过输入端口RX与射频拉远单元RRU连接；第一组滤波器和第二组滤波器中的发射滤波器通过输出端口TX与RRU连接。通过本发明实施例，解决了相关技术中双工滤波器及其系统组网架构复杂、线缆数量过多的问题。

Description

双工滤波装置、RRU系统及无线射频系统 技术领域
本发明涉及射频领域，具体而言，涉及一种双工滤波装置、RRU系统及无线射频系统。
背景技术
相关技术中，双工滤波器射频装置包括一路发射滤波器和一路接收滤波器组成主集收、发双工器，单独一路滤波器组成分集接收滤波器。通常双工器的发射滤波器和接收滤波器都是由金属同轴腔体构成，为满足基站所需的收发抑制、插损等性能，常用双工滤波器射频装置的发射滤波器和接收滤波器均有多个金属谐振腔构成。
图1是相关技术中双工滤波器及其系统组网架构示意图，如图1所示，包括两个射频拉远单元(Radio Remote Unit，简称为RRU)、四个异频合路器、一个四端口天线及多根射频线缆构成，其中，RRU由4个模块组成：中频模块、收发信机模块、功放和滤波模块；数字中频模块设置为光传输的调制解调、数字上下变频、A/D转换等；收发信机模块完成中频信号到射频信号的变换；再经过功放和滤波模块，将射频信号通过天线口发射出去；该RRU将基带信号下行经变频、滤波，经过射频滤波、经线性功率放大器后通过发送滤波传至天馈。上行将受到的移动终端上行信号进行滤波、低噪声放大、进一步的射频小信号放大滤波器和下变频，然后完成模数转换和数字中频处理等；该系统组网架构复杂、线缆数量过多、工程组件增加、可靠性及成本很高，不利于运营商网络扩容及升级。
目前，运营商对小型化、多功能的基站需求越来越迫切，如何增加基站功能来降低组网复杂度、减少组网过程中所需的天线、线缆数量、降低建站成本等成为所有通信运营商面临的重要难题。针对相关技术中的上述问题，目前尚未存在有效的解决方案。
发明内容
本发明实施例提供了一种双工滤波装置、RRU系统及无线射频系统，以至少解决相关技术中双工滤波器及其系统组网架构复杂、线缆数量过多的问题。
根据本发明的一个实施例，提供了一种双工滤波装置，所述双工滤波装置包括至少一个滤波单元，其中，所述滤波单元包括：接收滤波器、发射滤波器、收发合路器、公共接口ANT所述ANT包括第一ANT和第二ANT；所述收发合路器的一端和由至少一个所述接收滤波器和所述发射滤波器组成的第一组滤波器的一端分别与所述第一ANT连接；所述收发合路器的另一端和由至少一个所述接收滤波器和所述发射滤波器组成的第二组滤波器的一端分别与所述第二ANT连接，其中，所述第一ANT和所述第二ANT与外部接口单元连接；所述第一组滤波器和所述第二组滤波器中的接收滤波器通过输入端口RX与射频拉远单元RRU连接；所述第一组滤波器和所述第二组滤波器中的发射滤波器通过输出端口TX与所述RRU连接。
可选地，所述第一组滤波器包括第一接收滤波器和第一发射滤波器，所述第二组滤波器包括第二接收滤波器和第二发射滤波器；所述第一接收滤波器、所述第一发射滤波器以及所述收发合路器的ANT公共端分别与所述第一ANT连接；所述第一接收滤波器通过RX、以及所述第一发射滤波器通过TX与所述RRU连接；所述收发合路器的另一ANT公共端、所述第二接收滤波器和所述第二发射滤波器的ANT公共端连分别与所述第二ANT连接；所述第二接收滤波器通过RX、以及所述第二发射滤波器通过TX与RRU连接。
可选地，所述第一接收滤波器和所述第二接收滤波器的频段为第一频段，所述第一发射滤波器和所述第二发射滤波器的频段为第二频段，其中，所述第一频段与所述第二频段的频段不相同；所述收发合路器的频段为第三频段，其中，所述第三频段与所述第一频段和所述第二频段的频段各不相同。
可选地，所述第一频段和所述第二频段的频段为1800MHz，所述第三频段的频段为2100MHz；或，所述第一频段和所述第二频段的频段为2100MHz，所述第三频段的频段为1800MHz。
根据本发明的另一实施例，提供了一种RRU系统，所述RRU系统包括：射频拉远单元RRU以及上述任一项所述的双工滤波装置；所述双工滤波装置通过输出端口RX和输入端口TX与所述射频拉远单元RRU连接。
可选地，在所述双工滤波装置中包括N个滤波单元时，所述双工滤波装置通过每个滤波单元中的接收滤波器的RX和发射滤波器的TX分别与所述射频拉远单元RRU连接。
根据本发明的又一个实施例，提供了一种无线射频系统，所述射频系统包括：天线单元和至少二个上述任一项所述的RRU系统；所述RRU系统的公共接口ANT通过射频线缆与所述天线单元的端口连接。
可选地，在所述RRU系统包括第一RRU系统和第二RRU系统，且所述天线单元为N端口以及所述公共接口ANT为2N个时，所述N端口天线单元中的第一天线端口由射频线缆连接到第一RRU系统中的第一个ANT端口上；所述第一RRU系统的第二个ANT端口通过射频线缆连接到第二RRU系统的第2N-1个ANT端口上；所述第一RRU系统中的第2N-1个ANT端口通过射频线缆连接到所述第二RRU系统中的第二个ANT端口上；所述第一RRU系统中的第2N个ANT端口、所述第二RRU系统第一个ANT端口和第2N个ANT端口通过射频线缆分别连接到所述N端口天线单元的端口；其中，所述N为大于等于2自然数。
可选地，所述RRU系统包括：射频拉远单元RRU以及权利要求1至4任一项所述的双工滤波装置；其中，在所述双工滤波装置中只有一个滤波单元时，所述射频拉远单元RRU分别与所述双工滤波装置中的第一接收滤波器和所述第二接收滤波器的RX、以及所述第一发射滤波器和所述第二发射滤波器的RX连接；或，在所述双工滤波装置中有多个所述滤波单元时，所述射频拉远单元RRU与多个所述双工滤波装置中的第一接收滤波器和所述第二接收滤波器的RX、以及所述第一发射滤波器和所述第二发射滤波器的RX连接。
可选地，所述第一接收滤波器和所述第二接收滤波器的频段为第一频段，所述第一发射滤波器和所述第二发射滤波器的频段为第二频段，其中，所述第一频段与所述第二频段的频段不相同；所述收发合路器的频段为第三频段，其中，所述第三频段与所述第一频段和所述第二频段的频段各不相同。
可选地，所述第一RRU系统中双工滤波装置的所述第一频段和所述第二频段的频段为2100MHz，所述第三频段的频段为1800MHz；所述第二RRU系统中双工滤波装置的所述第一频段和所述第二频段的频段为1800MHz，所述第三频段的频段为2100MHz；或，所述第一RRU系统中双工滤波装置的所述第一频段和所述第二频段的频段为1800MHz，所述第三频段的频段为2100MHz；所述第二RRU系统中双工滤波装置的所述第一频段和所述第二频段的频段为2100MHz，所述第三频段的频段为1800MHz。
在本发明实施例中，收发合路器的一端和由至少一个接收滤波器和发射滤波器组成的第一组滤波器的一端分别与ANT连接；收发合路器的另一端和由至少一个接收滤波器和发射滤波器组成的第二组滤波器的一端分别与ANT连接，其中，ANT与外部接口单元连接；第一组滤波器和第二组滤波器中的接收滤波器通过输入端口RX与射频拉远单元RRU连接；第一组滤波器和第二组滤波器中的发射滤波器通过输出端口TX与RRU连接。通过本发明实施例，解决了相关技术中双工滤波器及其系统组网架构复杂、线缆数量过多的问题。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是相关技术中双工滤波器及其系统组网架构示意图；
图2是根据本发明实施例的双工滤波装置的结构框图；
图3是根据本发明可选实施例的RRU系统的结构框图；
图4是根据本发明实施例的天线射频系统的结构框图；
图5是根据本发明可选实施例的双工滤波器的结构框图；
图6是根据本发明可选实施例的双工滤波器系统组网框图；
图7是根据本发明可选实施例的4端口天线单元系统组网架构框图；
图8是根据本发明可选实施例的2端口天线单元系统组网架构框图；
图9是根据本发明可选实施例的n端口天线单元系统组网架构框图；
图10是根据本发明可选实施例的双工滤波器具体实施例系统框图；
图11是根据本发明可选实施例的双工滤波器实现2*4T4R组网架构的结构框图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
在本实施例中提供了一种双工滤波装置，图2是根据本发明实施例的双工滤波装置的结构框图，如图2所示，该双工滤波装置200包括至少一个滤波单元210，其中，滤波单元包括：接收滤波器211、发射滤波器212、收发合路器213、公共接口ANT214，ANT包括第一ANT214-1和第二ANT214-2；
收发合路器213的一端和由至少一个接收滤波器211和发射滤波器212组成的第一组滤波器的一端分别与第一ANT214-1连接；
收发合路器213的另一端和由至少一个接收滤波器211和发射滤波器212组成的第二组滤波器的一端分别与第二ANT214-2连接，其中，该第一ANT214-1和第二ANT214-2与外部接口单元连接；
第一组滤波器和第二组滤波器中的接收滤波器211通过输入端口RX与射频拉远单元RRU连接；
第一组滤波器和第二组滤波器中的发射滤波器212通过输出端口TX与RRU连接。
可选地，本实施例中的第一组滤波器包括第一接收滤波器和第一发射滤波器，第二组滤波器包括第二接收滤波器和第二发射滤波器；
其中，第一接收滤波器、第一发射滤波器以及收发合路器的ANT公共端分别与第一ANT连接；第一接收滤波器通过RX、以及第一发射滤波器通过TX与RRU连接；收发合路器的另一ANT公共端、第二接收滤波器和第二发射滤波器的ANT公共端连分别与第二ANT连接；第二接收滤波器通过RX、以及第二发射滤波器通过TX与RRU连接。
可选地，对于本实施例中涉及到的滤波器的频段，第一接收滤波器和第二接收滤波器的频段为第一频段，第一发射滤波器和第二发射滤波器的频段为第二频段，其中，第一频段与第二频段的频段不相同；收发合路器的频段为第三频段，其中，第三频段与第一频段和第二频段的频段各不相同。
在具体的应用场景中，本实施例中滤波器涉及到的频段可以是第一频段和第二频段的频段为1800MHz，第三频段的频段为2100MHz；或，第一频段和第二频段的频段为2100MHz，第三频段的频段为1800MHz。需要说明的是，上述本实施例中滤波器的频段取值仅仅是举例说明，并不构成对本发明的限定，在本发明的其他应用场景中，该频段的取值可以根据实际情况进行确定。
图3是根据本发明可选实施例的RRU系统的结构框图，如图3所示，该RRU系统300包括：射频拉远单元RRU310以及图2中的双工滤波装置200，其中，该双工滤波装置200通过输出端口RX和输入端口TX与射频拉远单元RRU310连接，并通过ANT214与外部接口连接。
需要说明的是图3中以一个滤波单元为例说明，滤波装置200与射频拉远单元RRU310的连接关系，在双工滤波装置中包括N个滤波单元时，双工滤波装置通过每个滤波单元中的接收滤波器的RX和发射滤波器的TX分别与射频拉远单元RRU连接，并通过ANT214与外部接口单元连接。
图4是根据本发明实施例的天线射频系统的结构框图，如图4所示，该天线射频系统包括：天线单元400和至少二个图3中的RRU系统300，其中，该RRU系统300的公共接口ANT214通过射频线缆与天线单元的端口连接，需要说明的是，图4是以滤波装置中仅有一个滤波单元为例进行说明。
可选地，在RRU系统包括第一RRU系统和第二RRU系统，且天线单元为N端口以及公共接口ANT214为2N个时，该N端口天线单元中的第一天线端口由射频线缆连接到第一RRU系统中的第一个ANT端口上；第一RRU系统的第二个ANT端口通过射频线缆连接到第二RRU系统的第2N-1个ANT端口上；第一RRU系统中的第2N-1个ANT端口通过射频线缆连接到第二RRU系统中的第二个ANT端口上；分别将第一RRU系统中的第2N个ANT端口、第二RRU系统第一个ANT端口和第2N个ANT端口分别用射频线缆连接到N端口天线单元的端口；其中，N为大于等于2自然数。
可选地，该RRU系统300还包括：射频拉远单元RRU310以及图2中的双工滤波装置200；其中，
在双工滤波装置中只有一个滤波单元时，射频拉远单元RRU分别与双工滤波装置中的第一接收滤波器和第二接收滤波器的RX、以及第一发射滤波器和第二发射滤波器的RX连接；或，在双工滤波装置中有多个滤波单元时，射频拉远单元RRU与多个双工滤波装置中的第一接收滤波器和第二接收滤波器的RX、以及第一发射滤波器和第二发射滤波器的RX连接。
需要说明的是，本实施例图4中涉及到的滤波器的频段与图2中滤波器涉及到的频段是一致的，在此不再赘述。
可见，在本实施例中，使用本实施例中的双工滤波装置、射频拉远单元RRU与天线等进行组网时，可以减少无线网络使用的天馈数量和射频线缆数量，使得工程安装简单、维护成本降低。
下面结合本发明的可选实施例对本发明进行举例说明；
本发明可选实施例公开了一种双工滤波器及其网络架构，该双工滤波器包括多个接收滤波器、多个发射滤波器、多个公共天线ANT端口、TX接口及RX接口等。同时，本可选实施例还提供了多种基于该双工滤波器的组网架构。
图5是根据本发明可选实施例的双工滤波器的结构框图，如图5所示，本可选实施例中双工滤波器可以由多个单元组成，其中，第1单元连接关系如下：
ANT1连接Filter1、Filter2、Filter3的一端；Filter1、Filter2另一端TX1、RX1分别连接到RRU射频处理单元，Filter3另一端连接到ANT2；Filter1、Filter2、Filter3为三种不同频段的滤波器；
ANT2连接Filter3、Filter4、Filter5的一端；Filter3另一端连接到ANT1，Filter4、Filter5另一端TX2、RX2连接到RRU射频处理单元；Filter3、Filter4、Filter5为三种不同频段的滤波器；
需要说明的是，上述Filter1和Filter4分别对应于上述实施例中的第一发射滤波器和第二滤波器，Filter2和Filter5对应于上述实施例中的第一接收滤波器和第二接收滤波器，Filter3对应于上述实施例中的收发合路器。
本可选实施例中双工滤波器第2单元连接关系如下：
ANT3连接Filter6、Filter7、Filter8的一端；Filter6、Filter7另一端TX3、RX3连接到RRU射频处理单元，Filter8另一端连接到ANT4；Filter6、Filter7、Filter8为三种不同频段的滤波器；
ANT4连接Filter8、Filter9、Filter10的一端；Filter8另一端连接到ANT4，Filter9、Filter10另一端TX4、RX4连接到RRU射频处理单元；Filter8、Filter9、Filter10为三种不同频段的滤波器；
需要说明的是，上述Filter6和Filter9分别对应于上述实施例中的第一发射滤波器和第二滤波器，Filter7和Filter10对应于上述实施例中的第一接收滤波器和第二接收滤波器，Filter8对应于上述实施例中的收发合路器。
另外，在本可选实施例中的双工滤波器扩展为n个单元时，第n单元的连接关系可以是：
ANT2n-1连接Filter5n-4、Filter5n-3、Filter5n-2的一端；Filter5n-4、Filter5n-3另一端TX2n-1、RX2n-1连接到RRU射频处理单元，Filter5n-2另一端连接到ANT2n；Filter5n-4、Filter5n-3、Filter5n-2为三种不同频段的滤波器；
ANT2n连接Filter5n-2、Filter5n-1、Filter5n的一端；Filter5n-1、Filter5n另一端TX2n、RX2n连接到RRU射频处理单元，Filter5n-2另一端连接到ANT2n－1；Filter5n-2、Filter5n-1、Filter5n为三种不同频段的滤波器；
图6是根据本发明可选实施例的双工滤波器系统组网框图，如图6所示，一种2端口天线单元的组网架构的连接关系为：2端口天线单元中的1端口通过射频线缆连接到双工器ANT1端口上，另一端口2通过射频线缆连接到双工器ANT4端口上；此外，该工器ANT2由射频线缆连接到第2个RRU的ANT2上；双工器ANT3由射频线缆连接到第2个RRU的ANT1上；由此形成一个由2端口天馈组成的并柜网络；
图7是根据本发明可选实施例的4端口天线单元系统组网架构框图，如图7所示，该组网连接关系为：4端口天线单元中的天线端口1由射频线缆连接到第1个RRU系统双工器ANT1端口上，第1个RRU系统双工器ANT2通过射频线缆连接到第2个RRU系统双工器ANT3端口上；同样，第1个RRU系统双工器ANT3通过射频线缆连接到第2个RRU系统双工器ANT2端口上；分别将第1个RRU系统双工器ANT4、第2个RRU系统双工器ANT1和ANT4分别用射频线缆连接到天线端口2、3、4上，形成一个由4端口天馈组成的并柜网络。
需要说明的是，上述是以两个双工滤波单元为例进行描述，在本可选实施例中还可以是双工滤波器中只有一个滤波单元，图8是根据本发明可选实施例的2端口天线单元系统组网架构框图，如图8所示，第一RRU系统中的第一个ANT连接到2端口天线单元第一端口，而第一RRU系统中的第二个ANT连接到第二RRU系统中的第一个ANT，而第二RRU系统中的第二个ANT连接到2端口天线单元第二端口。
图9是根据本发明可选实施例的n端口天线单元系统组网架构框图，如图9所示，在本可选实施例中的天线单元为n端口天线单元时，该组网连接关系为：n端口天线单元中的天线端口1由射频线缆连接到第1个RRU系统双工器ANT1端口上，第1个RRU系统双工器ANT2通过射频线缆连接到第2个RRU系统双工器ANT2n-1端口上；同样，第1个RRU系统双工器ANT2n-1通过射频线缆连接到第2个RRU系统双工器ANT2端口上；分别将第1个RRU系统双工器ANT2n、第2个RRU系统双工器ANT1和ANT2n分别用射频线缆连接到天线端口，形成一个由n端口天馈组成的并柜网络；
基于图9的组网架构框，本可选实施例中双工滤波器接收信号的流程可以是：空间无线信号经天线接收后，由射频线缆传送到第1个RRU滤波器ANT1公共端后，一路信号经Filter2(接收滤波器)滤波后由RX送给第1个RRU射频处理单元；ANT1公共端的另一路信号经Filter3(收发合路器)滤波后经射频线缆传送到第2个RRU ANT2n-1公共端后，经Filter5n-3滤波后由RX2n-1送给第2个RRU射频处理单元；
在第n个天线端口接收到的无线信号送到第1个RRU滤波器ANT2n公共端后，一路信号经Filter5n滤波后由RX2n送给第1个RRU射频处理单元；ANT2n公共端的另一路信号经Filter5n-2滤波后经射频线缆传送到第2个RRU ANT2公共端后，经Filter5滤波后由RX2送给第2个RRU射频处理单元；
第1个RRU射频处理单元发射信号经TX1接口后，由滤波器Filter1滤波经射频线缆传递到天线单元；TX2发射信号经滤波器Filter4滤波后通过射频线缆传输到ANT2n-1公共端后再经Filter5n-2合路到ANT2n公共口，再通过射频线缆传递到天线单元；
同理，第n路发射信号TX2n-1经滤波器Filter5n-4滤波后通过射频线缆传输到第2个RRU系统ANT2公共端后再经第2个RRU系统Filter3合路到ANT1公共口，再通过射频线缆传递到天线单元；
本可选实施例提供1800MHz、2100MHz两种不同频段的双工滤波器，图10是根据本发 明可选实施例的双工滤波器具体实施例系统框图，如图10所示，1800MHz双工滤波器包括：4路1800MHz发射滤波器(TX)、4路1800MHz接收滤波器(RX)、2路2100MHz宽带合路器(TRX)和4个天线接口(ANT1～ANT4)；
该1800MHz双工滤波器的连接关系为天线接口ANT1连接一路1800MHz发射滤波器(TX1)、1路1800MHz接收滤波器(RX1)、1路2100MHz宽带合路器(TRX)的一端；TX1、RX1另一端连接到RRU射频处理单元，2100MHz宽带合路器(TRX)另一端连接到ANT2；1800MHz发射滤波器(TX1)、1800MHz接收滤波器(RX1)、2100MHz宽带合路器(TRX)为三种不同频段的滤波器；此外，该ANT2连接一路1800MHz发射滤波器(TX2)、1路1800MHz接收滤波器(RX2)、1路2100MHz宽带合路器(TRX)的一端；2100MHz宽带合路器(TRX)另一端连接到ANT1，TX2、RX2连接到RRU射频处理单元；1800MHz发射滤波器(TX1)、1800MHz接收滤波器(RX1)、2100MHz宽带合路器(TRX)为三种不同频段的滤波器；
同理，ANT3、ANT4与1800MHz发射滤波器、1800MHz接收滤波器、2100MHz宽带合路器(TRX)互连方式与上述ANT1、ANT2相同，不再重复介绍；
需要说明的是，本可选实施例中的2100M双工滤波器与上述1800M双工器滤波器内部系统结构完全相同，不同的是滤波器工作频段的变化。
本可选实施例还提供了以1800MHz、2100MHz两种双工滤波器组成的4端口天线支持2*4T4R网络架构，图11是根据本发明可选实施例的双工滤波器实现2*4T4R组网架构的结构框图，如图11所示，该2*4T4R网络架构的连接关系为：4端口天线单元其中天线端口1由射频线缆连接到1800MHz双工器组成的RRU系统ANT1端口上，1800MHz RRU系统双工器ANT2通过射频线缆连接到2100MHz RRU系统双工器ANT3端口上；同样，1800MHz RRU系统双工器ANT3通过射频线缆连接到2100MHz RRU系统双工器ANT2端口上；再分别将1800MHz RRU系统双工器ANT4、2100MHz RRU系统双工器ANT1和ANT4分别用射频线缆连接到天线端口，形成一个由4端口天馈组成的2*4T4R并柜网络；
基于图11中双工滤波器实现2*4T4R组网架构，本可选实施例中2*4T4R网络架构中的双工滤波器接收信号的流程如下：
在空间无线信号经天线接收后，由射频线缆传送到1800MHz RRU系统滤波器ANT1公共端后，一路信号经1800MHz接收滤波器(RX1)滤波后送给1800MHz RRU射频处理单元；1800MHz RRU系统ANT1公共端的另一路信号经1800MHz RRU合路器(TRX)滤波后经射频线缆传送到2100MHz RRU系统AN3公共端后，经2100MHz RRU系统接收滤波器(RX3)滤波后送给2100MHz RRU射频处理单元；
同样，第2个天线端口接收到的无线信号送到1800MHz RRU接收滤波器ANT4公共端后，一路信号经1800MHz接收滤波器(RX4)滤波后送给1800MHz RRU射频处理单元；另一路信号经1800MHz RRU合路器(2100MHz/TRX)滤波后经射频线缆传送到2100MHz RRU ANT2公共端后，经RX2滤波后由RX2送给2100MHz RRU射频处理单元；
需要说明的是，第3、4天线口接收信号流程与上述第1、2天线口类似，这里不再重复；
此外，本可选实施例中2*4T4R网络架构中的双工滤波器发射信号的流程如下：
1800MHz RRU射频处理单元发射信号经1800MHz发射滤波器(TX1)滤波后由ANT1经射频线缆传递到天线单元；1800MHz RRU第2路发射信号经1800MHzRRU发射滤波器(TX2)滤波后通过射频线缆传输到2100MHz RRU ANT3公共端，再经2100MHz RRU合路器(1800MHz/TRX)合路到2100MHz RRU ANT4公共口，再通过射频线缆传递到天线单元；1800MHz RRU第3路发射信号经1800MHz RRU发射滤波器(TX3)滤波后通过射频线缆传输到2100MHz RRU ANT2公共端，再经2100MHz RRU合路器(1800MHz/TRX)合路到2100MHz RRU ANT1公共口，再通过射频线缆传递到天线单元；1800MHz RRU第4路发射信号经1800MHz RRU发射滤波器(TX4)滤波后通过射频线缆传递到天线单元；
需要说明的是，2100MHz RRU TX1～4发射信号流程与上述1800MHz RRU类似，这里不再重复。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
如上所述，本发明实施例提供的一种双工滤波装置、RRU系统及无线射频系统，具有以下有益效果：收发合路器的一端和由至少一个接收滤波器和发射滤波器组成的第一组滤波器的一端分别与ANT连接；收发合路器的另一端和由至少一个接收滤波器和发射滤波器组成的第二组滤波器的一端分别与ANT连接，其中，ANT与外部接口单元连接；第一组滤波器和第二组滤波器中的接收滤波器通过输入端口RX与射频拉远单元RRU连接；第一组滤波器和第二组滤波器中的发射滤波器通过输出端口TX与RRU连接。通过本发明实施例，解决了相关技术中双工滤波器及其系统组网架构复杂、线缆数量过多的问题。

Claims (11)

  1. 一种双工滤波装置，所述双工滤波装置包括至少一个滤波单元，其中，所述滤波单元包括：接收滤波器、发射滤波器、收发合路器、公共接口ANT，所述ANT包括第一ANT和第二ANT；
    所述收发合路器的一端和由至少一个所述接收滤波器和所述发射滤波器组成的第一组滤波器的一端分别与所述第一ANT连接；
    所述收发合路器的另一端和由至少一个所述接收滤波器和所述发射滤波器组成的第二组滤波器的一端分别与所述第二ANT连接，其中，所述第一ANT和所述第二ANT与外部接口单元连接；
    所述第一组滤波器和所述第二组滤波器中的接收滤波器通过输入端口RX与射频拉远单元RRU连接；
    所述第一组滤波器和所述第二组滤波器中的发射滤波器通过输出端口TX与所述RRU连接。
  2. 根据权利要求1所述的双工滤波装置，其中，所述第一组滤波器包括第一接收滤波器和第一发射滤波器，所述第二组滤波器包括第二接收滤波器和第二发射滤波器；
    所述第一接收滤波器、所述第一发射滤波器以及所述收发合路器的ANT公共端分别与所述第一ANT连接；
    所述第一接收滤波器通过RX、以及所述第一发射滤波器通过TX与所述RRU连接；
    所述收发合路器的另一ANT公共端、所述第二接收滤波器和所述第二发射滤波器的ANT公共端连分别与所述第二ANT连接；
    所述第二接收滤波器通过RX、以及所述第二发射滤波器通过TX与所述RRU连接。
  3. 根据权利要求2所述的双工滤波装置，其中，
    所述第一接收滤波器和所述第二接收滤波器的频段为第一频段，所述第一发射滤波器和所述第二发射滤波器的频段为第二频段，其中，所述第一频段与所述第二频段的频段不相同；
    所述收发合路器的频段为第三频段，其中，所述第三频段与所述第一频段和所述第二频段的频段各不相同。
  4. 根据权利要求3所述的双工滤波装置，其中，
    所述第一频段和所述第二频段的频段为1800MHz，所述第三频段的频段为2100MHz；或，
    所述第一频段和所述第二频段的频段为2100MHz，所述第三频段的频段为1800MHz。
  5. 一种RRU系统，所述RRU系统包括：射频拉远单元RRU以及权利要求1至4任一项所述的双工滤波装置；
    所述双工滤波装置通过输出端口RX和输入端口TX与所述射频拉远单元RRU连接。
  6. 根据权利要求5所述的RRU系统，其中，
    当所述双工滤波装置中包括N个滤波单元时，所述双工滤波装置通过每个滤波单元中的接收滤波器的RX和发射滤波器的TX分别与所述射频拉远单元RRU连接。
  7. 一种无线射频系统，所述无线射频系统包括：天线单元和至少两个如权利要求5或6所述的RRU系统；
    所述RRU系统的公共接口ANT通过射频线缆与所述天线单元的端口连接。
  8. 根据权利要求7所述的无线射频系统，其中，当所述RRU系统包括第一RRU系统和第二RRU系统，且所述天线单元为N端口以及所述公共接口ANT为2N个时，
    所述N端口天线单元中的第一天线端口由射频线缆连接到第一RRU系统中的第一个ANT端口上；
    所述第一RRU系统的第二个ANT端口通过射频线缆连接到第二RRU系统的第2N-1个ANT端口上；
    所述第一RRU系统中的第2N-1个ANT端口通过射频线缆连接到所述第二RRU系统中的第二个ANT端口上；
    所述第一RRU系统中的第2N个ANT端口、所述第二RRU系统第一个ANT端口和第2N个ANT端口通过射频线缆分别连接到所述N端口天线单元的端口；
    其中，所述N为大于或等于2的自然数。
  9. 根据权利要求8所述的无线射频系统，其中，
    所述RRU系统包括：射频拉远单元RRU以及权利要求1至4任一项所述的双工滤波装置；其中，
    在所述双工滤波装置中只有一个滤波单元时，所述射频拉远单元RRU分别与所述双工滤波装置中的第一接收滤波器和所述第二接收滤波器的RX、以及所述第一发射滤波器和所述第二发射滤波器的RX连接；或，
    在所述双工滤波装置中有多个所述滤波单元时，所述射频拉远单元RRU与多个所述双工滤波装置中的第一接收滤波器和所述第二接收滤波器的RX、以及所述第一发射滤波器和所述第二发射滤波器的RX连接。
  10. 根据权利要求9所述的无线射频系统，其中，
    所述第一接收滤波器和所述第二接收滤波器的频段为第一频段，所述第一发射滤波器和所述第二发射滤波器的频段为第二频段，其中，所述第一频段与所述第二频段的频段不相同；
    所述收发合路器的频段为第三频段，其中，所述第三频段与所述第一频段和所述第二频段的频段各不相同。
  11. 根据权利要求10所述的无线射频系统，其中，
    所述第一RRU系统中双工滤波装置的所述第一频段和所述第二频段的频段为2100MHz，所述第三频段的频段为1800MHz；所述第二RRU系统中双工滤波装置的所述第一频段和所述第二频段的频段为1800MHz，所述第三频段的频段为2100MHz；或，
    所述第一RRU系统中双工滤波装置的所述第一频段和所述第二频段的频段为1800MHz，所述第三频段的频段为2100MHz；所述第二RRU系统中双工滤波装置的所述第一频段和所述第二频段的频段为2100MHz，所述第三频段的频段为1800MHz。
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