CN111010217A - Wireless repeater and method for realizing MIMO - Google Patents
Wireless repeater and method for realizing MIMO Download PDFInfo
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- CN111010217A CN111010217A CN201911312756.9A CN201911312756A CN111010217A CN 111010217 A CN111010217 A CN 111010217A CN 201911312756 A CN201911312756 A CN 201911312756A CN 111010217 A CN111010217 A CN 111010217A
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- 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
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
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Abstract
The invention discloses a wireless repeater and a method for realizing MIMO, wherein a plurality of host straight channels are arranged in a host unit of the wireless repeater, and a plurality of slave straight channels are arranged in a slave unit, so that the MIMO function can be supported, the throughput rate of a base station is fully released, the throughput rate and the spectrum utilization rate of a coverage area are improved, and the network investment consumption ratio and the user experience are further improved. The wireless repeater further expands the coverage range of signals by amplifying the signals of the master unit and the slave unit in a relay way.
Description
Technical Field
The invention relates to the field of mobile communication, in particular to a wireless repeater and a method for realizing MIMO.
Background
With the rapid development of the mobile internet and the popularization of intelligent terminals, users of the mobile internet hope to access the internet anytime and anywhere to acquire information and services. The mobile internet has profoundly influenced various aspects of people's life, study and work. The mobile internet economy accounts for more and more heavily in the national economy, and the information service of the telecommunication infrastructure sinks in the national economy in the future, so that the informatization requirements of the industries such as manufacturing, education, traffic, logistics and the like are met. Good signal coverage can not only help operators to establish brand advantages, but also realize digital transformation of various industries in the society.
Due to the attenuation of wireless signals along with distance, mobile communication stations are difficult to acquire, and the coverage environment is limited (such as the environments of the ground floor of a large building, an underground mall, an underground parking lot, an elevator and the like), a large number of weak coverage areas and coverage blind areas exist in the existing network. In order to solve the problems of weak coverage and coverage blind areas, wireless repeater equipment is widely applied to the existing network at present. The wireless repeater station device is a wireless signal relay device, and plays a role in amplifying a wireless signal, and fig. 1 is a schematic structural diagram of a wireless repeater station.
The wireless repeater used in the existing network generally adopts 1T1R (one transmission and one reception), does not support multiple transmission and multiple reception, and the source base station where the wireless repeater is located adopts 2T2R, 2T4R, 4T4R and the like. That is to say, the source base station supports mimo (Multiple Input Multiple output), and the wireless repeater only supports siso (single Input single output), so that the wireless repeater does not fully release the uplink and downlink throughput of the base station, and the throughput is only 1/2 or 1/4 of the base station, which results in huge waste of throughput, low spectrum efficiency, low network investment cost ratio, poor user experience, and the like.
Disclosure of Invention
The invention aims to overcome the defects of throughput rate waste and low spectrum efficiency caused by the fact that the existing wireless repeater does not support MIMO, and provides a wireless repeater and a method for realizing MIMO.
In order to achieve the purpose, the wireless repeater comprises a host unit and a slave unit, wherein the host unit is connected with a host external antenna and a host combiner, the slave unit is connected with a slave external antenna and a slave combiner, data communication is carried out between the host combiner and the slave combiner, a plurality of host straight amplification channels are arranged in the host unit, and a plurality of slave straight amplification channels are arranged in the slave unit;
the master direct-amplifying channel and the slave direct-amplifying channel are used for amplifying, filtering and carrying out frequency conversion on the received wireless signals.
The structure of the host direct-amplifying channel and the structure of the slave direct-amplifying channel are the same, baseband processing devices are arranged in the host direct-amplifying channel and the slave direct-amplifying channel, the host direct-amplifying channel and the slave direct-amplifying channel respectively comprise a first radio frequency front end device, a first transceiver, a second radio frequency front end device and a second transceiver, the first radio frequency front end device is connected with the corresponding first transceiver, the second radio frequency front end device is connected with the corresponding second transceiver, and all the first transceiver and all the second transceiver are connected with the same baseband processing device.
The external antenna of the host computer and the external antenna of the slave computer adopt an NxN type MIMO antenna.
The host unit and the information source are communicated through a radio frequency feed cable, and the radio frequency feed cable is a single multi-core or a plurality of multi-cores.
A method for realizing MIMO of a wireless repeater comprises a downlink frequency conversion process and an uplink frequency conversion process;
the downlink frequency conversion process comprises the following steps:
step one, each path of host direct amplifying channel of a host unit receives wireless signals of each channel of a signal source through an external antenna;
step two, the host straight-amplifying channel carries out filtering and frequency conversion processing on the received wireless signals;
step three, after the host direct-amplifying channel amplifies the power of the wireless signal after the frequency conversion processing, the wireless signal is sent to the slave unit through the host combiner and the slave combiner;
step four, each channel of slave direct amplifying channel in the slave unit receives the wireless signal sent by the host direct amplifying channel;
fifthly, filtering and frequency conversion processing are carried out on the received wireless signals through the slave direct-amplifying channel, and the frequency is restored to the original frequency of the information source;
step six, the slave direct-amplifying channel amplifies the power of the wireless signal after frequency conversion and then sends the wireless signal to a terminal;
the uplink frequency conversion process comprises the following steps:
step one, receiving an uplink wireless signal sent by a terminal from an external antenna of a slave machine;
step two, filtering and frequency conversion processing are carried out on the received wireless signals through the slave direct-amplifying channel;
thirdly, the slave direct-amplifying channel amplifies the power of the wireless signal after the frequency conversion processing and then sends the wireless signal to the host unit;
step four, the host direct amplifying channel receives the wireless signal sent by the slave direct amplifying channel;
step five, the host direct-amplifying channel carries out filtering and frequency conversion processing on the received wireless signals, and the frequency is restored to the original frequency of the terminal;
and sixthly, the host direct amplification channel amplifies the power of the wireless signal subjected to the frequency conversion processing and then sends the wireless signal to the base station through the host external antenna.
A method for realizing MIMO of wireless repeater, in the frequency conversion procedure of the downlink, the host computer puts the channel and changes the radio signal received into the signal with lower frequency directly;
in the uplink frequency conversion process, the slave direct-amplifying channel converts the received wireless signals into signals with lower frequency.
Compared with the prior art, the wireless repeater has the advantages that the host unit is internally provided with the plurality of host straight channels, the slave unit is internally provided with the plurality of slave straight channels, the MIMO function can be supported, the throughput rate of the base station is fully released, the throughput rate and the spectrum utilization rate of a coverage area are improved, and the network investment consumption ratio and the user experience are further improved. The wireless direct-amplifying station further expands the coverage range of signals by amplifying the signals of the master unit and the slave unit in a relay way.
The method of the invention is realized by frequency conversion of each direct-amplifying channel of the host unit and the slave unit, and the isolation between the donor antenna and the retransmission antenna of each direct-amplifying channel can be improved by frequency conversion processing of signals received by the host direct-amplifying channel and the slave direct-amplifying channel, thereby achieving the purpose of eliminating the problems of self excitation of each direct-amplifying channel and co-channel interference between the direct-amplifying channels.
Furthermore, the invention converts the high frequency of the original wireless signal of the base station into the low frequency, and the low frequency signal is more beneficial to the transmission of the wireless signal, thereby achieving the farther transmission distance of the wireless signal.
Drawings
FIG. 1 is a schematic diagram of a conventional repeater;
FIG. 2 is a downlink frequency conversion process flow of the present invention;
FIG. 3 is a flow of an uplink frequency conversion process of the present invention;
FIG. 4 is a schematic diagram of a wireless repeater according to the present invention;
FIG. 5 is a schematic structural diagram of a wireless repeater supporting 2 × 2MIMO according to an embodiment of the present invention;
FIG. 6 is a schematic view of a single pass straight through channel of the present invention;
FIG. 7 is a schematic diagram of a multi-channel straight discharge channel of the present invention;
wherein, 1, a host unit; 2. a slave unit; 3. the host is provided with an external antenna; 4. a host combiner; 5. a slave combiner; 6. an external antenna of the slave machine; 7. a host straight discharge channel; 8. a slave machine is directly placed in the channel; 9. a baseband processing device; 10. a first radio frequency front end device; 11. a first transceiver device; 12. a second radio frequency front end device; 13. and a second transceiver.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 4, a wireless repeater includes a master unit 1 and a slave unit 2, where the master unit 1 is connected to a master external antenna 3 and a master combiner 4, the slave unit 2 is connected to a slave external antenna 6 and a slave combiner 5, the master combiner 4 and the slave combiner 5 perform data communication, a plurality of master straight-amplification channels 7 are built in the master unit 1, and a plurality of slave straight-amplification channels 8 are built in the slave unit 2. The master direct amplifying channel 7 and the slave direct amplifying channel 8 are used for amplifying, filtering and frequency converting the received wireless signals.
Referring to fig. 7, the structure of the master direct amplifying channel 7 is the same as that of the slave direct amplifying channel 8, baseband processing devices 9 are respectively disposed in the master direct amplifying channel 7 and the slave direct amplifying channel 8, each of the master direct amplifying channel 7 and the slave direct amplifying channel 8 includes a first radio frequency front end device 10, a first transceiver device 11, a second radio frequency front end device 12 and a second transceiver device 13, the first radio frequency front end device 10 is connected with the corresponding first transceiver device 11, the second radio frequency front end device 12 is connected with the corresponding second transceiver device 13, and all the first transceiver devices 11 and all the second transceiver devices 13 are connected with the same baseband processing device 9.
The host external antenna 3 and the slave external antenna 6 adopt NXN type MIMO antennas, the host unit 1 and the information source are communicated through a radio frequency feed cable, and the radio frequency feed cable is a single multi-core or a plurality of multi-cores.
Referring to fig. 2 and fig. 3, a method for implementing MIMO by a wireless repeater includes a downlink frequency conversion process and an uplink frequency conversion process;
the downlink frequency conversion process comprises the following steps:
firstly, each host straight amplification channel 7 of the host unit 1 receives wireless signals of each channel of the information source through the host external antenna 3;
step two, the host straight-amplifying channel 7 carries out filtering and frequency conversion processing on the received wireless signals;
step three, the wireless signal after frequency conversion processing is subjected to power amplification by the host direct-amplifying channel 7 and then is sent to the slave unit 2 through the host combiner 4 and the slave combiner 5;
step four, each channel of slave direct amplifying channel 8 in the slave unit 2 receives the wireless signal sent by the host direct amplifying channel 7;
fifthly, filtering and frequency conversion processing are carried out on the received wireless signals through the slave direct amplifying channel 8, and the frequency is restored to the original frequency of the information source;
step six, the slave direct-amplifying channel 8 amplifies the power of the wireless signal after frequency conversion and then sends the wireless signal to a terminal;
the uplink frequency conversion process comprises the following steps:
step one, receiving an uplink wireless signal sent by a terminal from an external antenna 6 of a slave machine;
step two, the slave straight-amplification channel 8 carries out filtering and frequency conversion processing on the received wireless signals;
thirdly, the slave direct-amplifying channel 8 amplifies the power of the wireless signal after the frequency conversion processing and then sends the wireless signal to the host unit 1;
step four, the host direct amplifying channel 7 receives the wireless signal sent by the slave direct amplifying channel 8;
step five, the host straight amplification channel 7 carries out filtering and frequency conversion processing on the received wireless signals, and restores the frequency to the original frequency of the terminal;
and sixthly, the host direct amplification channel 7 amplifies the power of the wireless signal after frequency conversion and sends the wireless signal to the base station through the host external antenna 3.
A method for realizing MIMO of wireless repeater, in the frequency conversion procedure of the downlink, the host computer directly puts the channel 7 and changes the wireless signal received into the signal with lower frequency;
in the uplink frequency conversion process, the slave straight amplification channel 8 converts the received wireless signal into a signal with lower frequency.
Example (b):
referring to fig. 5 and fig. 6, in the present embodiment, a wireless repeater supporting 2 × 2MIMO is provided, and a tdd (time Division duplexing) mode is adopted as a communication mode, that is, uplink and downlink frequencies adopt the same frequency.
The main unit 1 comprises two main straight discharging channels, namely a first straight discharging channel and a second straight discharging channel. The first direct-amplification channel and the second direct-amplification channel are independent circuits and can finish frequency conversion amplification processing of signals. The communication between the host unit and the base station or the information source can adopt a wired mode or a wireless mode. The communication between the master unit and the slave unit can be in a wired mode or a wireless mode.
When the host unit 1 communicates with a base station or a source in a wireless manner, a 2 × 2MIMO external antenna manner is adopted. The first host straight amplification channel receives a signal of one channel of the external antenna, and the second host straight amplification channel receives a signal of the other channel of the external antenna.
In order to achieve a longer distance transmission of wireless signals, the first and second direct-playing channels of the host unit can convert the frequency of the signals of the base station or the source into lower frequency.
When the master unit 1 and the slave unit 2 communicate in a wired manner, a signal with the frequency of F1 in the first master direct amplifying channel and a signal with the frequency of F2 in the second master direct amplifying channel may be combined into one signal by the combiner 4, and then the signal may be transmitted to the combiner at the opposite end by a radio frequency feed cable, where two ports of the combiner are connected to the first slave direct amplifying channel and the second slave direct amplifying channel of the slave unit, respectively.
When the master unit 1 and the slave unit 2 communicate with each other in a wireless manner, the master unit 1 adopts an external antenna manner, and the slave unit 2 also adopts an external antenna manner.
The slave unit comprises two paths of direct discharging channels, a first slave direct discharging channel and a second slave direct discharging channel. The first slave direct-amplifying channel and the second slave direct-amplifying channel are independent circuits and can finish frequency conversion and amplification processing of signals. The communication between the slave unit 2 and the terminal adopts an external antenna mode.
When the frequency conversion processing is performed on the received signals by the first slave direct-current amplifier channel and the second slave direct-current amplifier channel of the slave unit 2, the frequencies of the received signals with the frequencies F1 and F2 need to be restored to the original frequency F0 of the terminal.
The slave unit 2 may communicate with the terminal by using a 2 × 2MIMO external antenna, or using two independent external omni-directional antennas.
The downlink frequency conversion specifically comprises the following steps:
step one, a host straight amplifying channel 7 of a host unit 1 receives wireless signals of each channel of the 2 x 2 type MIMO external antenna.
Specifically, the first host straight amplification channel receives a signal with the frequency of F0_1 from the external antenna.
Specifically, the second main unit direct-current amplification channel receives a signal with the frequency of F0_2 from the external antenna.
The frequency F0_1 and the frequency F0_2 are the same spectrum, and differ in polarization, or are transmitted by different base station channels, or different antenna channels, or different antennas.
And step two, the host straight amplification channel 7 carries out filtering and frequency conversion processing on the received wireless signals.
The first host straight channel filters the received signal with the frequency of F0_1 and changes the frequency into F1.
The second host straight channel filters the received signal with the frequency of F0_2 and changes the frequency into F2.
The frequency F1 and the frequency F2 are different frequencies.
And step three, the host direct-amplifying channel 7 amplifies the power of the wireless signal after the frequency conversion processing and then sends the wireless signal to the slave unit 2.
The first master direct-amplifying channel performs power amplification on the radio signal with the frequency of F1 after the frequency conversion processing, and then sends the radio signal to the slave unit 2.
The second master direct-amplifying channel performs power amplification on the radio signal with the frequency of F2 after the frequency conversion processing, and then sends the radio signal to the slave unit 2.
And step four, the slave direct amplifier channel 8 receives the wireless signal sent by the host direct amplifier channel 7.
And step five, filtering and frequency conversion processing are carried out on the received wireless signals through the slave unit direct amplification channel 8, and the frequency is restored to the original frequency of the base station.
And after filtering the received signal by the first slave straight amplification channel, restoring the frequency of the signal with the frequency of F1 to F0_ 1.
And after filtering the received signal by the second slave straight amplification channel, restoring the frequency of the signal with the frequency of F2 to F0-2.
And step six, the slave direct amplifying channel 8 amplifies the power of the signals subjected to frequency conversion and then sends the signals to the terminal.
And the first slave machine direct amplification channel performs power amplification on the signal with the frequency of F0_1 after frequency conversion processing, and then sends the signal to the terminal through a 2 x 2 type MIMO external antenna.
And the second slave machine direct amplification channel performs power amplification on the signal with the frequency of F0_2 after frequency conversion processing, and then sends the signal to the terminal through a 2 x 2 type MIMO external antenna.
The uplink frequency conversion specifically includes the following steps:
step one, receiving an uplink wireless signal sent by a terminal from an external 2 x 2 type MIMO antenna of a slave unit.
And the first slave straight amplification channel receives a signal with the frequency of F0_1 from the external antenna.
And the second slave straight amplification channel receives a signal with the frequency of F0_2 from the external antenna.
The frequency F0_1 and the frequency F0_2 are the same frequency spectrum.
And step two, filtering and frequency conversion processing are carried out on the received wireless signals by the slave unit direct-amplifying channel.
The first slave straight-playing channel filters the received signal with the frequency of F0_1 and changes the frequency into F1.
The second slave straight-playing channel filters the received signal with the frequency of F0_2 and changes the frequency into F2.
The frequency F1 and the frequency F2 are different frequencies.
Thirdly, each direct amplification channel of the slave unit amplifies the power of the wireless signal after frequency conversion processing and then sends the wireless signal to the host unit;
the first slave direct-amplifying channel amplifies the power of the radio signal with frequency F1 after frequency conversion and sends the amplified signal to the master unit 1.
The second slave direct-amplification channel performs power amplification on the radio signal with the frequency of F2 after the frequency conversion processing, and then sends the radio signal to the master unit 1.
Step four, each direct amplifying channel of the host unit receives the wireless signal sent by each direct amplifying channel of the slave unit;
fifthly, each host straight-amplifying channel 7 carries out filtering and frequency conversion processing on the received wireless signals, and the frequency is restored to the original frequency of the terminal;
the first host straight-playing channel filters the received signal and restores the frequency of the signal with the frequency of F1 to F0_ 1.
And after filtering the received signal, the second host straight amplification channel restores the frequency of the signal with the frequency of F2 to F0-2.
And step six, the host direct amplification channel 7 amplifies the power of the wireless signal after frequency conversion processing and sends the wireless signal to the base station through an external 2 x 2 type MIMO antenna.
The first host straight amplification channel 7 performs power amplification on the frequency-converted signal with the frequency of F0_1, and then sends the signal to the base station through 2 × 2MIMO external.
The second host straight amplification channel 7 performs power amplification on the frequency-converted signal with the frequency of F0_2, and then sends the signal to the base station through the 2 × 2MIMO external antenna.
Claims (6)
1. A wireless repeater is characterized by comprising a host unit (1) and a slave unit (2), wherein the host unit (1) is connected with a host external antenna (3) and a host combiner (4), the slave unit (2) is connected with a slave external antenna (6) and a slave combiner (5), the host combiner (4) and the slave combiner (5) are in data communication, a plurality of host straight-amplification channels (7) are arranged in the host unit (1), and a plurality of slave straight-amplification channels (8) are arranged in the slave unit (2);
the master direct amplifying channel (7) and the slave direct amplifying channel (8) are used for amplifying, filtering and carrying out frequency conversion on the received wireless signals.
2. The wireless repeater according to claim 1, wherein the structure of the master straight path (7) is the same as that of the slave straight path (8), the base band processing device (9) is disposed in each of the master straight path (7) and the slave straight path (8), each of the master straight path (7) and the slave straight path (8) includes a first rf front end device (10), a first transceiver device (11), a second rf front end device (12) and a second transceiver device (13), the first rf front end device (10) is connected to the corresponding first transceiver device (11), the second rf front end device (12) is connected to the corresponding second transceiver device (13), and all the first transceiver devices (11) and all the second transceiver devices (13) are connected to the same base band processing device (9).
3. The wireless repeater according to claim 1, wherein the master external antenna (3) and the slave external antenna (6) adopt an N x N MIMO antenna.
4. The wireless repeater according to claim 1, wherein the host unit (1) communicates with the information source through a radio frequency feeder cable, the radio frequency feeder cable is a single multi-core or a plurality of multi-cores.
5. A method for realizing MIMO based on the wireless repeater of claim 1, which comprises a downlink frequency conversion process and an uplink frequency conversion process;
the downlink frequency conversion process comprises the following steps:
step one, each host straight amplification channel (7) of a host unit (1) receives wireless signals of each channel of a signal source through a host external antenna (3);
step two, the host straight-amplifying channel (7) carries out filtering and frequency conversion processing on the received wireless signals;
thirdly, the wireless signal after frequency conversion processing is subjected to power amplification through the host direct amplification channel (7) and then is sent to the slave unit (2) through the host combiner (4) and the slave combiner (5);
step four, each path of slave direct-amplifying channel (8) in the slave unit (2) receives the wireless signal sent by the host direct-amplifying channel (7);
fifthly, filtering and frequency conversion processing are carried out on the received wireless signals through the slave direct-amplifying channel (8), and the frequency is restored to the original frequency of the information source;
sixthly, the slave direct-amplifying channel (8) amplifies the power of the radio signal after frequency conversion and sends the radio signal to a terminal;
the uplink frequency conversion process comprises the following steps:
step one, receiving an uplink wireless signal sent by a terminal from an external antenna (6);
step two, filtering and frequency conversion processing are carried out on the received wireless signals through the slave direct-amplifying channel (8);
thirdly, the slave direct-amplifying channel (8) amplifies the power of the wireless signal after frequency conversion processing and then sends the wireless signal to the host unit (1);
step four, the host direct amplifying channel (7) receives the wireless signal sent by the slave direct amplifying channel (8);
fifthly, the host straight-amplification channel (7) carries out filtering and frequency conversion processing on the received wireless signals, and restores the frequency to the original frequency of the terminal;
and sixthly, the host direct amplification channel (7) amplifies the power of the wireless signal after frequency conversion and sends the wireless signal to the base station through the host external antenna (3).
6. The method of claim 5, wherein in the down link frequency conversion process, the host straight channel (7) converts the received wireless signal into a signal with lower frequency;
in the uplink frequency conversion process, the slave straight amplification channel (8) converts the received wireless signals into signals with lower frequency.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911312756.9A CN111010217A (en) | 2019-12-18 | 2019-12-18 | Wireless repeater and method for realizing MIMO |
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| CN201911312756.9A CN111010217A (en) | 2019-12-18 | 2019-12-18 | Wireless repeater and method for realizing MIMO |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111541469A (en) * | 2020-04-24 | 2020-08-14 | Oppo广东移动通信有限公司 | User terminal equipment |
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Application publication date: 20200414 |