CN213879818U - Support MIMO's 5G room and divide device - Google Patents
Support MIMO's 5G room and divide device Download PDFInfo
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- CN213879818U CN213879818U CN202023339106.4U CN202023339106U CN213879818U CN 213879818 U CN213879818 U CN 213879818U CN 202023339106 U CN202023339106 U CN 202023339106U CN 213879818 U CN213879818 U CN 213879818U
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Abstract
The utility model discloses a support 5G room of MIMO to divide device, the utility model discloses a high frequency transform of near-end machine and distal end machine with the 5G information source divides the low frequency that the system supported by passive room, has solved the problem that current passive room divides the system not support the 5G frequency channel. The device and system provided by the utility model through the mode with the high frequency transformation of former information source for different low frequencies, realized the MIMO function in single set system passive room branch system. The system provided by the utility model can support MIMO 5G only by transforming the near end and the far end of the original indoor distribution system, thereby effectively utilizing the original passive indoor distribution system and protecting the investment; meanwhile, the method has the advantages of low engineering complexity and simple and easy property coordination.
Description
Technical Field
The utility model belongs to the wireless communication field, concretely relates to support 5G room of MIMO to divide device.
Background
With the rapid development of mobile internet and the rapid rise of a plurality of new services in recent years, such as online shopping, small videos, live videos, high-definition videos, AR/VR and the like, the demand for network traffic is sharply increased. According to the prediction of the industry, more than 85% of the traffic occurs in indoor scenes, so that indoor signal coverage plays a crucial role in meeting the traffic demand. However, the original passive indoor subsystem does not support a 5G frequency band, nor does it support the deployment of MIMO (Multiple Input Multiple output), and if the 5G frequency band and MIMO are to be supported, the system is modified to have the problems of large technical difficulty, high cost, difficult implementation, and the like, which are specifically embodied in the following 2 aspects:
1) the original passive indoor distribution system comprises passive devices such as a radio frequency feeder cable, a coupler, a power divider, a combiner and the like, the working frequency band of the passive devices is 800 MHz-2500 MHz at present, the current mainstream 5G frequency bands such as 2.6G, 3.5GHz and 4.9G and the like are not supported, and key performance indexes such as insertion loss, coupling degree, flatness, standing-wave ratio and the like can not meet the deployment requirement of the mainstream 5G frequency band;
2) the difficulty of deploying the MIMO system is high, when the original siso (Single Input Single output) indoor subsystem is upgraded to a 2 × 2MIMO system or a 4 × 4MIMO system, 1 or 3 sets of radio frequency feed cables and passive devices are required to be added to realize the MIMO system, and the problems of high technical difficulty, difficulty in engineering implementation and high cost exist.
Disclosure of Invention
The utility model aims to overcome the defects and provide a 5G room distribution device supporting MIMO, which solves the problem that the current passive room distribution system does not support the mainstream 5G frequency band and MIMO deployment,
in order to achieve the purpose, the utility model comprises a near-end machine and a far-end machine, wherein the information source is connected with the near-end machine, and the far-end machine is connected with the tail end of the passive room subsystem;
the near-end machine comprises a combiner/splitter and N paths of MIMO channels, the combiner/splitter is connected with all the MIMO channels, and each path of MIMO channel comprises a near-end machine downlink and a near-end machine uplink;
the remote machine comprises a combiner/splitter, N paths of MIMO channels and MIMO antennas, the combiner/splitter is connected with all the MIMO channels, and each path of MIMO channel comprises a remote machine downlink and a remote machine uplink;
the down link of the near-end machine is used for converting the frequency of the RF signal of the information source into the frequency of an IF signal, and feeding each path of IF signal into the passive room subsystem after being combined by the combiner/splitter;
the near-end machine uplink is used for reducing the IF signal frequency into the RF signal frequency in a frequency conversion mode, and transmitting the RF signal to the information source after amplification and filtering processing;
the remote machine downlink is used for reducing the frequency conversion of the information source IF signal into RF signal frequency and sending each path of RF signal to the MIMO antenna;
the remote uplink is used for converting the frequency of the RF signal into the frequency of the IF signal, and then the IF signal processed by amplification and filtering is combined by the combiner/splitter and fed into the passive room subsystem.
The frequency of the IF signal after the frequency conversion of the MIMO channel is in the frequency range of 800MHz to 2500 MHz.
The IF signals in each MIMO channel are at different frequencies.
And the uplink and the downlink of the MIMO channel are subjected to frequency conversion processing through a Transceiver device.
The near-end downlink, near-end uplink, far-end downlink and far-end uplink each include: an RF switch, an RF low noise amplifier, an RF filter, a Transceiver device, an IF filter, an IF amplifier and an IF switch;
the combiner/splitter is connected with an IF switch, the IF switch is connected with an IF amplifier and an IF low-noise amplifier, the IF amplifier and the IF low-noise amplifier are respectively connected with corresponding IF filters, the IF filters are connected with a Transceiver device, the Transceiver device is connected with an RF filter, the RF filter is connected with corresponding RF low-noise amplifier and an RF amplifier, and the RF low-noise amplifier and the RF amplifier are both connected with the RF switch;
the RF switches of the down link of the near-end machine and the up link of the near-end machine are used for transmitting and receiving RF signals, and the combiner/splitter is used for transmitting and receiving IF signals;
RF switches for the remote downlink and remote uplink are used to transceive RF signals to and from the MIMO antenna, and a combiner/splitter is used to transmit IF signals to the passive room subsystem.
The number of MIMO channels of the far-end machine is the same as that of the near-end machine.
The respective MIMO channel IF frequencies of the far-end unit and the respective MIMO channel IF frequencies of the near-end unit correspond to each other.
Compared with the prior art, the utility model discloses a high frequency transform of near-end machine and distal end machine with the 5G information source divides the low frequency that the system supported for passive room, has solved the problem that current passive room divides the system not support the 5G frequency channel. The device and system provided by the utility model through the mode with the high frequency transformation of former information source for different low frequencies, realized the MIMO function in single set system passive room branch system. The system provided by the utility model can support MIMO 5G only by transforming the near end and the far end of the original indoor distribution system, thereby effectively utilizing the original passive indoor distribution system and protecting the investment; meanwhile, the method has the advantages of low engineering complexity and simple and easy property coordination.
Further, the utility model provides a near-end machine and distal end machine device pass through Transceiver module alright realize the frequency conversion, compare through the frequency conversion system that separation devices such as mixer, phase-locked loop and local oscillator were built, stray has obtained effectual reduction, and the integrated level of device is high.
Drawings
Fig. 1 is a 5G indoor access terminal supporting 2 × 2MIMO according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a near-end transmitter frequency conversion principle provided by an embodiment of the present invention;
fig. 3 is a 5G remote room terminal supporting 2 × 2MIMO according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a remote transmitter frequency conversion principle provided by an embodiment of the present invention;
fig. 5 is a 5G indoor subsystem supporting 2 × 2MIMO according to an embodiment of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The embodiment of the utility model provides a support 5G room of MIMO function to divide device and system, explains for better explaining this kind of equipment and system with the device and the system that support 2X 2MIMO function as the example here, and this kind of device and can utilize old original passive room to divide the system, and the 5G frequency channel is arranged on former passive room divides the system, can realize realizing 2X 2MIMO function in one set of passive room divides the system.
The 5G indoor device supporting the 2 × 2MIMO function provided in this embodiment specifically includes a near-end device supporting the 2 × 2MIMO function and a far-end device supporting the 2 × 2MIMO function.
The 2 × 2MIMO near-end machine is located at the 5G signal source, specifically comprises an MIMO _1 channel and an MIMO _2 channel, and mainly realizes frequency conversion, amplification and filtering processing of two paths of MIMO channel signals. The signal processing of each MIMO channel includes downlink and uplink, and the schematic diagram of the 2 × 2MIMO near-end machine is shown in fig. 1.
The downlink has the main functions of accessing 5G information source 2 x 2MIMO signals, then down-converting the RF signal of one path of MIMO signal into an IF _1 signal, down-converting the RF signal of two other paths of MIMO signals into an IF _2 signal, and finally combining the amplified and filtered IF _1 signal and IF _2 signal through a combiner and feeding the combined signal into a passive room subsystem.
The main functions of the uplink are to access an IF signal, then, the upper side frequency of the IF _1 signal and the IF _2 signal is used as an RF signal, and finally, the two paths of RF signals after amplification and filtering are sent to a 5G information source.
Further, the IF _1 frequency and the IF _2 frequency are in a frequency range of 800MHz to 2500MHz, which is a frequency supported by the original passive room subsystem.
Further, IF _1 frequency and IF _2 frequency are different frequencies, so as to coexist in the same rf feed cable, the same coupler, the same combiner, and other passive devices, as shown in fig. 5.
Further, the IF _1 frequency and the IF _2 frequency are selected so as not to interfere with each other.
Further, the IF _1 and IF _2 frequencies must not be the same as the 2G, 3G, and 4G signal frequencies present in current passive room subsystems.
Further, the spurs generated by the IF _1 frequency and the IF _2 frequency must not interfere with the 2G, 3G, and 4G signals present in current passive indoor subsystems.
The 2 × 2MIMO near-end machine is composed of 2MIMO channels and a combiner/splitter, wherein the 2MIMO channels specifically include a MIMO _1 channel and a MIMO _2 channel, and each MIMO channel includes a downlink and an uplink.
The downlink of the MIMO _1 channel mainly realizes down-conversion of an information source RF signal into an IF _1 signal, and then the IF _1 signal is amplified, filtered and fed into a passive indoor subsystem through a combiner; the uplink mainly realizes that the IF _1 signal is up-converted and restored into an RF signal, and then the RF signal is amplified, filtered and transmitted to the information source.
The downlink of the MIMO _1 channel specifically comprises modules or devices of an RF switch, an RF low-noise amplifier, an RF filter and a Transceiver module, an IF filter, an IF amplifier and an IF switch, and the modules or devices realize the following functions:
the RF switch is in charge of being connected with the information source in an abutting mode, and combination or separation of the RF uplink signals and the RF downlink signals is achieved.
The RF low noise amplifier amplifies a source signal received via RF.
The RF filter performs a filtering process on the RF signal subjected to the RF low-noise amplification process.
The Transceiver module down-converts the RF signal to an IF _1 signal.
The IF filter performs filtering processing on the IF _1 signal after being converted by the Transceiver.
The IF amplifier amplifies the IF _1 signal filtered by the IF filter.
The IF switch is in butt joint with the combiner, and the combination or separation of the IF _1 uplink and downlink signals is realized.
The uplink of the MIMO _1 channel specifically comprises modules or devices including an IF switch, an IF low-noise amplifier, an IF filter and a Transceiver module, and an RF filter, an RF amplifier and an RF switch, wherein the modules or devices realize the following functions:
the IF switch is in charge of butt joint with the combiner/splitter to realize the combination or separation of the IF _1 uplink and downlink signals.
The IF low noise amplifier amplifies the IF _1 signal.
The IF filter performs a filtering process on the IF _1 signal subjected to the IF low noise amplification process.
The Transceiver module up-converts the IF _1 signal to be restored as an RF signal.
The RF filter performs filtering processing on the RF signal after frequency conversion by the Transceiver.
The RF amplifier amplifies the RF signal filtered by the IF filter.
The RF switch is in butt joint with the information source, and the combination or separation of the RF uplink and downlink signals is realized.
The down link of the MIMO _2 channel mainly has the functions of realizing down conversion of an information source RF signal into an IF _2 frequency signal, amplifying, filtering and processing the IF _2 signal, and feeding the IF _2 signal into a passive indoor subsystem through a combiner; the uplink mainly realizes that the IF _2 signal is restored into an RF signal, and then the RF signal is amplified, filtered and transmitted to the information source.
The downlink of the MIMO _2 channel specifically comprises modules or devices of an RF switch, an RF low-noise amplifier, an RF filter and a Transceiver module, an IF filter, an IF amplifier and an IF switch, and the modules or devices realize the following functions:
the RF switch is in charge of being connected with the information source in an abutting mode, and combination or separation of the RF uplink signals and the RF downlink signals is achieved.
The RF low noise amplifier amplifies a source signal received via RF.
The RF filter performs a filtering process on the RF signal subjected to the RF low-noise amplification process.
The Transceiver module down-converts the RF signal to an IF _2 signal.
The IF filter performs filtering processing on the IF _2 signal after being converted by the Transceiver.
The IF amplifier amplifies the IF _2 signal filtered by the IF filter.
The IF switch is in butt joint with the combiner, and the combination or separation of the IF _2 uplink and downlink signals is realized.
The uplink of the MIMO _2 channel specifically comprises modules or devices including an IF switch, an IF low-noise amplifier, an IF filter and a Transceiver module, and an RF filter, an RF amplifier and an RF switch, wherein the modules or devices realize the following functions:
the IF switch is in charge of butt joint with the combiner/splitter to realize the combination or separation of the IF _2 uplink and downlink signals.
The IF low noise amplifier amplifies the IF _2 signal.
The IF filter performs a filtering process on the IF _2 signal subjected to the IF low noise amplification process.
The Transceiver module up-converts the IF _2 signal to be restored as an RF signal.
The RF filter performs filtering processing on the RF signal after frequency conversion by the Transceiver.
The RF amplifier amplifies the RF signal filtered by the IF filter.
The RF switch is connected with the information source in an abutting mode, and the uplink and downlink combination or separation of the RF signals is achieved.
The main function of the combiner/splitter is to achieve the combining and splitting of the IF signals. Particularly, an IF _1 signal and an IF _2 signal are combined into a signal on a downlink to be fed into a passive indoor distribution system; and receiving the IF _1 signal and the IF _2 signal on an uplink, and then separating the two paths of IF signals, specifically, feeding the IF _1 signal into a MIMO _1 channel and feeding the IF _2 signal into a MIMO _2 channel.
Two MIMO channels supporting a 2 × 2MIMO near-end machine share one Transceiver device to realize down-conversion of 2 RF signals and up-conversion of 2 IF signals, and the schematic diagram of the Transceiver frequency conversion principle of the near-end machine is shown in FIG. 2.
The Transceiver of the near-end machine comprises 4 transmitting channels TX and 4 receiving channels RX, wherein the 4 TX is TX _ A, TX _ B, TX _ C, TX _ D; the 4 RX channels are specifically RX _ A, RX _ B, RX _ C, RX _ D.
The frequency of each channel of the Transceiver of the near-end machine is planned as follows:
the MIMO _1 channel includes RX _ A, TX _ A, RX _ C and TX _ C. The RX _ a and TX _ a are combined to realize down-conversion of the RF signal into an IF _1 signal, specifically, the RX _ a receives the RF signal, and outputs the IF _1 signal through the TX _ a after frequency conversion; in addition, RX _ C and TX _ C are combined to realize up-conversion of the IF _1 signal into an RF signal, specifically, RX _ C receives the IF _1 signal, and the frequency-converted IF _1 signal outputs the RF signal through TX _ C;
the MIMO _2 channel includes RX _ B, TX _ B, RX _ D and TX _ D. The RX _ B and TX _ B are combined to realize down-conversion of the RF signal into an IF _2 signal, specifically, the RX _ B receives the RF signal, and outputs the IF _2 signal through the TX _ B after frequency conversion; in addition, RX _ D and TX _ D are combined to realize up-conversion of an IF _2 signal into an RF signal, specifically, RX _ B receives the IF _2 signal, and the frequency-converted RF signal is output through TX _ D.
Further, the Transceiver chip may adopt AFE76xx and AFE79xx series chips manufactured by TI corporation, which are a high performance rf sampling DAC and ADC integrated 4T4R device, and the frequency conversion processing of the MIMO channel can be realized through digital down-conversion and digital up-conversion.
The 2 multiplied by 2MIMO remote machine is positioned at the tail end of the indoor distribution system, specifically comprises an MIMO _1 channel and an MIMO _2 channel, and mainly realizes the frequency conversion, amplification and filtering processing of two paths of MIMO channel signals. The signal processing of each MIMO channel includes downlink and uplink, and the schematic diagram of the 2 × 2MIMO remote terminal is shown in fig. 3.
The down link has the main functions of accessing the IF signals after frequency conversion processing through the near-end machine, then up-converting the IF _1 signal of one path of MIMO signal into an RF signal, up-converting the IF _2 signal of two other paths of MIMO signals into an RF signal, and finally sending the two paths of RF signals after amplification and filtering processing to the 5G information source.
The uplink has the main functions of accessing RF signals, then respectively dividing the lower edge frequency of two paths of RF signals into IF _1 signals and IF _2 signals, and finally combining the amplified and filtered IF _1 signals and IF _2 signals through a combiner and feeding the combined signals into a passive room subsystem.
The 2 x 2MIMO remote terminal consists of a combiner/splitter, 2MIMO channels and a 2 x 2MIMO dual-polarized antenna, wherein the 2MIMO channels specifically comprise a MIMO _1 channel and a MIMO _2 channel, and each MIMO channel comprises a downlink and an uplink.
The main function of the combiner/splitter is to achieve the combining and splitting of the IF signals. Specifically, an IF _1 signal and an IF _2 signal are received in a downlink, then two paths of IF signals are separated, specifically, the IF _1 signal is fed into a MIMO _1 channel, and the IF _2 signal is fed into a MIMO _2 channel; the IF _1 signal and the IF _2 signal are received on an uplink, and then the IF _1 signal and the IF _2 signal are combined into a signal to be fed into the passive room subsystem.
The downlink of the MIMO _1 channel mainly realizes that IF _1 signals are up-converted and restored into RF signals, and then the RF signals are amplified, filtered and radiated by MIMO antennas to provide signal coverage; the uplink mainly realizes up-conversion of IF _1 signals into RF signals, amplification and filtering of the IF _1 signals, and feeding of the IF _1 signals to the passive indoor subsystem through a combiner.
The downlink of the MIMO _1 channel specifically comprises modules or devices of an IF switch, an IF low-noise amplifier, an IF filter and a Transceiver module, and an RF filter, an RF amplifier and an RF switch, wherein the modules or devices realize the following functions:
the IF switch is in charge of butt joint with the combiner/splitter to realize the combination or separation of the IF _1 uplink and downlink signals.
The IF low noise amplifier amplifies the IF _1 signal.
The IF filter performs a filtering process on the IF _1 signal subjected to the IF low noise amplification process.
The Transceiver module up-converts the IF _1 signal to be restored as an RF signal.
The RF filter performs filtering processing on the RF signal after frequency conversion by the Transceiver.
The RF amplifier amplifies the RF signal filtered by the IF filter.
The RF switch is in butt joint with the 2 x 2MIMO dual-polarized antenna, and the uplink and downlink combination or separation of RF signals is realized.
The uplink of the MIMO _1 channel specifically comprises modules or devices of an RF switch, an RF low-noise amplifier, an RF filter and a Transceiver module, an IF filter, an IF amplifier and an IF switch, and the modules or devices realize the following functions:
the RF switch is in charge of butt joint with the 2 x 2MIMO dual-polarized antenna, and realizes the combination or separation of the uplink and the downlink of the RF signals.
The RF low noise amplifier amplifies the RF signal.
The RF filter performs a filtering process on the RF signal subjected to the RF low-noise amplification process.
The Transceiver module down-converts the RF signal to an IF _1 signal.
The IF filter performs filtering processing on the IF _1 signal after being converted by the Transceiver.
The IF amplifier amplifies the IF _1 signal filtered by the IF filter.
The IF switch is in butt joint with the combiner/splitter to realize the combination or separation of the IF _1 uplink and downlink signals.
The downlink of the MIMO _2 channel mainly realizes that IF _2 signals are up-converted and restored into RF signals, and then the RF signals are amplified, filtered and radiated by MIMO antennas to provide signal coverage; the uplink mainly realizes that the RF signal is down-converted into an IF _2 signal, and then the IF _2 signal is amplified, filtered and fed into the passive indoor subsystem through the combiner.
The downlink of the MIMO _2 channel specifically comprises modules or devices of an IF switch, an IF low-noise amplifier, an IF filter and a Transceiver module, and an RF filter, an RF amplifier and an RF switch, wherein the modules or devices realize the following functions:
the IF switch is in charge of butt joint with the combiner/splitter to realize the up-and-down combination or separation of the IF _2 signals.
The IF low noise amplifier amplifies the IF _2 signal.
The IF filter performs a filtering process on the IF _2 signal subjected to the IF low noise amplification process.
The Transceiver module up-converts the IF _2 signal to be restored as an RF signal.
The RF filter performs filtering processing on the RF signal after frequency conversion by the Transceiver.
The RF amplifier amplifies the RF signal filtered by the IF filter.
The RF switch is in butt joint with the 2 x 2MIMO dual-polarized antenna, and the uplink and downlink combination or separation of RF signals is realized.
The uplink of the MIMO _2 channel specifically includes modules or devices of an RF switch, an RF low noise amplifier, an RF filter, a Transceiver module, an IF filter, an IF amplifier, and an IF switch, and each module or device realizes the following functions:
the RF switch is in charge of butt joint with the 2 x 2MIMO dual-polarized antenna, and realizes the combination or separation of the uplink and the downlink of the RF signals.
The RF low noise amplifier amplifies the RF signal.
The RF filter performs a filtering process on the RF signal subjected to the RF low-noise amplification process.
The Transceiver module down-converts the RF signal to an IF _2 signal.
The IF filter performs filtering processing on the IF _2 signal after being converted by the Transceiver.
The IF amplifier amplifies the IF _2 signal filtered by the IF filter.
The IF switch is in butt joint with the combiner/splitter to realize the up-and-down combination or separation of the IF _2 signals.
Two MIMO channels supporting a 2 × 2MIMO far-end machine share one Transceiver device to realize down-conversion of 2-channel RF signals and up-conversion of 2-channel IF signals, and a schematic diagram of a Transceiver frequency conversion principle of a near-end machine is shown in FIG. 4.
The Transceiver of the remote machine comprises 4 transmitting channels TX and 4 receiving channels RX, wherein the 4 TX is TX _ A, TX _ B, TX _ C, TX _ D; the 4 RX channels are specifically RX _ A, RX _ B, RX _ C, RX _ D.
The frequency plan of each channel of the Transceiver of the remote machine is as follows:
the MIMO _1 channel includes RX _ A, TX _ A, RX _ C and TX _ C. The RX _ a and TX _ a are combined to realize up-conversion of the IF _1 signal into an RF signal, specifically, RX _ a receives the IF _1 signal, and the RF signal is output through TX _ a after frequency conversion; in addition, RX _ C and TX _ C are combined to realize down-conversion of the RF signal into an IF _1 signal, specifically, RX _ C receives the RF signal, and the IF _1 signal is output through TX _ C after frequency conversion.
The MIMO _2 channel includes RX _ B, TX _ B, RX _ D and TX _ D. Wherein, RX _ B and TX _ B are combined to realize the up-conversion of IF _2 signals into RF signals, specifically, RX _ A receives the IF _2 signals, and the RF signals are output through TX _ A after frequency conversion; in addition, RX _ D and TX _ D are combined to realize down-conversion of the RF signal into an IF _2 signal, specifically, the RX _ D receives the RF signal, and the IF _2 signal is output through TX _ D after frequency conversion.
Further, the Transceiver chip may adopt AFE76xx and AFE79xx series chips manufactured by TI corporation, which are a high performance rf sampling DAC and ADC integrated 4T4R device, and the frequency conversion processing of the MIMO channel can be realized through digital down-conversion and digital up-conversion.
The main function of a 2 × 2MIMO dual-polarized antenna is to achieve spatial reception and coverage of RF signals. Specifically, two paths of RF signals are received on a downlink, and signal coverage is provided through space radiation; and receiving signals sent by the user terminal on an uplink, and feeding the two latter signals into an MIMO _1 channel and an MIMO _2 channel.
The utility model provides a pair of support 5G room branch system of 2X 2MIMO function specifically includes that 1 2X 2MIMO near-end machine, a plurality of 2X 2MIMO remote machine constitute, and this kind of system can realize the 2X 2MIMO of 5G signal in one set of passive room branch system and cover.
The 2X 2MIMO near-end machine is arranged at the position of the 5G information source, is in charge of being in butt joint with the 5G information source and is used for receiving the information source signal and sending the signal to the information source; the 2 × 2MIMO near-end machines are distributed at the end of the system, and are responsible for interfacing with the user terminal, for receiving signals transmitted by the user terminal and providing signal coverage.
The 2 × 2MIMO room subsystem divides the processing of signals into two links: downlink and uplink.
The downlink has the main functions of accessing 2 paths of RF signals from a signal source, and down-converting the two paths of RF signals into IF signals supported by a passive indoor subsystem through a near-end machine, wherein the IF signals are specifically IF _1 signals and IF _2 signals; then feeding the IF _1 signal and the IF _2 signal into the passive room subsystem; and the remote terminal at the tail end of the system receives the IF _1 signal and the IF _2 signal from the passive indoor distribution system, then up-converts the two paths of IF signals into two paths of RF signals, and finally provides 5G signal coverage through 2 multiplied by 2MIMO dual-polarized antenna radiation.
The uplink mainly has the functions that a 2 x 2MIMO dual-polarized antenna of a far-end machine receives RF signals from a user terminal, and the far-end machine down-converts two paths of RF signals into IF signals supported by a passive room subsystem, specifically IF _1 signals and IF _2 signals; then feeding the IF _1 signal and the IF _2 signal into the passive room subsystem; and receiving the IF _1 signal and the IF _2 signal from the passive room subsystem at a system source end near-end machine, performing up-conversion on the two paths of IF signals to restore the two paths of IF signals into two paths of RF signals, and transmitting the two paths of RF signals to the information source.
Further, the IF frequencies of the MIMO channels of the near-end unit and the far-end unit of the MIMO indoor subsystem are mutually corresponding, specifically, IF _1 of the MIMO _1 channel of the near-end unit corresponds to IF _1 of the MIMO _1 channel of the far-end unit, and IF _2 of the MIMO _2 channel of the near-end unit corresponds to MIMO _2 channel IF _2 of the far-end unit.
Further, IF _1 frequency and IF _2 frequency are different from the 2G, 3G, and 4G signal frequencies currently existing in passive room subsystems, so as not to affect the normal transmission of 2G, 3G, and 4G signals.
Furthermore, the indoor subsystem supporting the 2 × 2MIMO function can also be deployed in a newly-built single set of indoor subsystems, so that 2 × 2MIMO signal coverage can be realized.
Claims (7)
1. A5G indoor distribution device supporting MIMO is characterized by comprising a near-end machine and a far-end machine, wherein an information source is connected to the near-end machine, and the far-end machine is connected to the tail end of a passive indoor distribution system;
the near-end machine comprises a combiner/splitter and N paths of MIMO channels, the combiner/splitter is connected with all the MIMO channels, and each path of MIMO channel comprises a near-end machine downlink and a near-end machine uplink;
the remote machine comprises a combiner/splitter, N paths of MIMO channels and MIMO antennas, the combiner/splitter is connected with all the MIMO channels, and each path of MIMO channel comprises a remote machine downlink and a remote machine uplink;
the down link of the near-end machine is used for converting the frequency of the RF signal of the information source into the frequency of an IF signal, and feeding each path of IF signal into the passive room subsystem after being combined by the combiner/splitter;
the near-end machine uplink is used for reducing the IF signal frequency into the RF signal frequency in a frequency conversion mode, and transmitting the RF signal to the information source after amplification and filtering processing;
the remote machine downlink is used for reducing the frequency conversion of the information source IF signal into RF signal frequency and sending each path of RF signal to the MIMO antenna;
the remote uplink is used for converting the frequency of the RF signal into the frequency of the IF signal, and then the IF signal processed by amplification and filtering is combined by the combiner/splitter and fed into the passive room subsystem.
2. The MIMO-enabled 5G indoor division unit according to claim 1, wherein the IF signal frequency after the frequency conversion of the MIMO channel is in a frequency range of 800MHz to 2500 MHz.
3. The MIMO-enabled 5G diversity apparatus of claim 1, wherein the IF signals in each MIMO channel are at different frequencies.
4. The MIMO-enabled 5G indoor separation device according to claim 1, wherein uplink and downlink of the MIMO channel are frequency-converted by a Transceiver device.
5. The MIMO-enabled 5G indoor distribution apparatus of claim 1, wherein the near-end downlink, the near-end uplink, the far-end downlink and the far-end uplink each comprise: an RF switch, an RF low noise amplifier, an RF filter, a Transceiver device, an IF filter, an IF amplifier and an IF switch;
the combiner/splitter is connected with an IF switch, the IF switch is connected with an IF amplifier and an IF low-noise amplifier, the IF amplifier and the IF low-noise amplifier are respectively connected with corresponding IF filters, the IF filters are connected with a Transceiver device, the Transceiver device is connected with an RF filter, the RF filter is connected with corresponding RF low-noise amplifier and an RF amplifier, and the RF low-noise amplifier and the RF amplifier are both connected with the RF switch;
the RF switches of the down link of the near-end machine and the up link of the near-end machine are used for transmitting and receiving RF signals, and the combiner/splitter is used for transmitting and receiving IF signals;
RF switches for the remote downlink and remote uplink are used to transceive RF signals to and from the MIMO antenna, and a combiner/splitter is used to transmit IF signals to the passive room subsystem.
6. The MIMO-enabled 5G indoor distribution apparatus of claim 1, wherein the number of MIMO channels of the far-end machine is the same as the number of MIMO channels of the near-end machine.
7. The MIMO-enabled 5G indoor distribution apparatus of claim 1, wherein the respective MIMO channel IF frequencies of the far end machine and the respective MIMO channel IF frequencies of the near end machine correspond to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023339106.4U CN213879818U (en) | 2020-12-31 | 2020-12-31 | Support MIMO's 5G room and divide device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114189875A (en) * | 2021-10-26 | 2022-03-15 | 江苏通鼎宽带有限公司 | 5G4T4R intelligent distributed remote system |
| CN116647853A (en) * | 2023-07-26 | 2023-08-25 | 赛尔通信服务技术股份有限公司 | DAS end passive device for enhancing 5G signal power |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114189875A (en) * | 2021-10-26 | 2022-03-15 | 江苏通鼎宽带有限公司 | 5G4T4R intelligent distributed remote system |
| CN116647853A (en) * | 2023-07-26 | 2023-08-25 | 赛尔通信服务技术股份有限公司 | DAS end passive device for enhancing 5G signal power |
| CN116647853B (en) * | 2023-07-26 | 2023-09-22 | 赛尔通信服务技术股份有限公司 | DAS end passive device for enhancing 5G signal power |
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