CN105656525A - Multi-band multi-mode ultra high-speed MIMO wireless communication method and device - Google Patents
Multi-band multi-mode ultra high-speed MIMO wireless communication method and device Download PDFInfo
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Abstract
The invention discloses a multi-band multi-mode ultra high-speed MIMO (Multiple Input Multiple Output) wireless communication method. According to the method, a transmitter converts an IEEE 802.3 data frame into an IEEE 802.11 wireless data frame according to a wireless communication mode requested by a terminal, and selects a corresponding wireless network interface to transmit data; for an IEEE 802.11b/a/g/n/ac mode, source data are subjected to corresponding baseband signal processing and radio frequency modulation to generate maximum N-path spatial stream signals at the 2.4 GHz frequency band or the 5.8 GHz frequency band, and data are transmitted via N antennas; for an IEEE 802.11aj mode, source data are subjected to baseband signal processing and microwave frequency band modulation to generate maximum N-path spatial stream signals at the 45 GHz frequency band, and data are transmitted via N antennas; and a receiver uses a corresponding method to perform data receiving and demodulation. The invention further provides a communication method adopting the communication method. The communication method and device can effectively utilize rich spectrum resources of millimeter wave to greatly improve data transmission throughput of a wireless communication system, and simultaneously support WIFI standard terminal access under current three frequency bands and six modes.
Description
Technical field
The invention belongs to wireless communication technology field, particularly to multi-frequency multi-mode ultrahigh speed multiple-input and multiple-output (MultipleInputMultipleOutput, MIMO) communication means and the device of WLAN.
Background technology
The ultrahigh speed wireless local area network technology IEEE802.11ac of low-frequency range 5.8GHz is 80MHz in the maximum channel width of product in the market, transfer rate is up to 1.3Gbps, data throughput is up to 700Mbps, the technology and the product that realize at present can support two frequency ranges of 2.4GHz and 5.8GHz simultaneously, support IEEE802.11b simultaneously, IEEE802.11a, IEEE802.11g, IEEE802.11n, five kinds of patterns of IEEE802.11ac, but multi-channel video streaming needs the transfer rate of more than 1Gbps in the market, and the data traffic of intelligent terminal is growing, new technology and method is needed to increase the data throughout of WAP or wireless base station.
Low-frequency range (lower than 6GHz) wireless communication spectrum resource is day by day rare, widely use interference at present very serious, the demand of very high-speed data transfer speed and the frequency resource of millimeter wave frequency band are very abundant, millimeter wave frequency band ultrahigh speed wireless communication technology is increasingly received publicity, such as in December, 2013,42.3 ~ 47GHz and 47.2 ~ 48.4GHz is amounted to the frequency spectrum resource of 5.9GHz for ultrahigh speed wireless access and without radio license by Ministry of Industry and Information's approval.
The present invention utilizes the millimeter wave 45GHz resource of frequency range, realization can support 2.4GHz(2400MHz ~ 2483.5MHz simultaneously), 5.8GHz(5.15GHz ~ 5.85GHz) and 45GHz(42.3 ~ 47.0GHz, 47.2GHz ~ 48.4GHz) three frequency ranges, support the multi-frequency multi-mode ultrahigh speed MIMO WAP of six kinds of patterns of IEEE802.11b, IEEE802.11a, IEEE802.11g, IEEE802.11n, IEEE802.11ac, IEEE802.11aj simultaneously.The access point realized can reach the peak rate of more than 3Gbps.
Summary of the invention
Goal of the invention: low-frequency range (lower than 6GHz) wireless communication spectrum resource is day by day rare, widely use interference very big, have a strong impact on systematic function, even can not effectively work, the present invention effectively utilizes the millimeter wave 45GHz resource of frequency range, realization can support 2.4GHz simultaneously, three frequency ranges of 5.8GHz and 45GHz, support IEEE802.11b simultaneously, IEEE802.11a, IEEE802.11g, IEEE802.11n, IEEE802.11ac, the multi-frequency multi-mode ultrahigh speed MIMO WAP of six kinds of patterns of IEEE802.11aj, effectively utilize the frequency resource that millimeter wave frequency band enriches very much, the peak rate realizing wireless communication system can reach more than 3Gbps, meet growing and forth generation mobile communication technology LTE base station in the market the passback of the data traffic of intelligent terminal and the requirement of the transfer rate of multi-channel video streaming up to more than 1Gbps.
Technical scheme:For foregoing invention purpose, the present invention adopts the following technical scheme that
A kind of multi-frequency multi-mode ultrahigh speed mimo wireless communication method, its data sending step includes:
The transmitter wireless communications mode according to premises equipment requests, converts the Frame of IEEE802.3 the wireless data frame of IEEE802.11 to, and selects corresponding wireless network interface to send data;
When wireless communications mode is a kind of in IEEE802.11a, IEEE802.11b, IEEE802.11g, IEEE802.11n and IEEE802.11ac, information source data are carried out according to corresponding wireless mode base band signal process and rf modulations, produce the maximum N road spatial flow signal of 2.4GHz or 5.8GHz frequency range, send data by N number of radio-frequency antenna;
When wireless communications mode is IEEE802.11aj, information source data is carried out base band signal process and microwave frequency band modulation, produces the maximum N road spatial flow signal of 45GHz frequency range, send data by N number of microwave frequency band antenna;
Data reception step includes:
After receiver receives the spatial flow signal of maximum N road 2.4GHz or 5.8GHz frequency range from N number of radio-frequency antenna, carry out radio demodulating and base band signal process, recover the information source data that transmitter sends;
After receiver receives the spatial flow signal of maximum N road 45GHz frequency range from N number of microwave frequency band antenna, carry out microwave frequency band solution mediation base band signal process, recover the information source data that transmitter sends;
Receiver converts the wireless data frame of IEEE802.11 the Frame of IEEE802.3 to, and Frame is forwarded to Ethernet interface;
Above-mentioned N is the natural number be more than or equal to 1.
Further, described base band signal process and rf modulations that information source data are carried out, produce the N road spatial flow signal of 2.4GHz or 5.8GHz frequency range, the concrete steps being sent data by N number of radio-frequency antenna are included:
Information source data are sequentially carried out coding, modulation, spatial spread and digital simulation signal conversion processes, produce N road base-band analog signal;
Every road base-band analog signal is sequentially carried out amplification, I/Q modulation and small-power amplify, produces the differential signal of 2.4GHz or 5.8GHz;
Convert every road differential signal coupling to single-ended 50 ohmage signals, then output, to the transmitting terminal of corresponding radio-frequency (RF) switch, exports to respective antenna from the antenna connection terminal of radio-frequency (RF) switch, sends data by antenna after being filtered and amplifying;
After described receiver receives the spatial flow signal of maximum N road 2.4GHz or 5.8GHz frequency range from N number of radio-frequency antenna, carrying out radio demodulating and base band signal process, the concrete steps recovering the information source data that transmitter sends include:
2.4GHz or the 5.8GHz signal that every road radio-frequency (RF) switch exports carries out wideband low noise amplification, and output to diplexer separates goes out 2.4GHz and 5.8GHz single-ended signal;
Convert every road single-ended signal coupling to differential signal, then carry out radiofrequency signal amplification, I/Q solve be in harmonious proportion amplify after output base-band analog signal;
Base-band analog signal is sequentially carried out analog and digital signal conversion, mimo channel is estimated, mimo channel is balanced, solution mediation decoding processes, and recovers the information source data that transmitter sends.
Further, described information source data are carried out base band signal process and microwave frequency band modulation, produce 45GHz frequency range maximum N road spatial flow signal, by N number of microwave frequency band antenna send data concrete steps include:
Information source data are sequentially carried out coding, modulation, spatial spread and digital simulation signal conversion processes, produce N road base-band analog signal;
Every road base-band analog signal is sequentially carried out filtering, variable gain is amplified and I/Q modulation, produce the microwave signal of 45GHz frequency range, microwave signal carries out signal and amplifies the output transmitting terminal to corresponding radio-frequency (RF) switch, export to respective antenna from the antenna connection terminal of radio-frequency (RF) switch, send data by antenna;
After described receiver receives the spatial flow signal of maximum N road 45GHz frequency range from N number of microwave frequency band antenna, carrying out microwave frequency band solution mediation base band signal process, the concrete steps recovering the information source data that transmitter sends include:
The 45GHz signal that every road radio-frequency (RF) switch exports is sequentially carried out low noise amplification, variable gain is amplified and I/Q demodulation obtains analog baseband signal, then the I/Q two paths of signals of analog baseband signal is carried out variable gain amplification and filtering respectively;
Analog baseband signal is sequentially carried out analog and digital signal conversion, mimo channel is estimated, mimo channel is balanced, solution mediation decoding processes, and recovers the information source data that transmitter sends.
A kind of device adopting above-mentioned multi-frequency multi-mode ultrahigh speed mimo wireless communication method, including a gigabit networking processor, described gigabit networking processor includes a PCIE interface, the 2nd PCIE interface and at least two gigabit ethernet interface, a described PCIE interface connects 2.4GHz/5.8GHz dual-band radio transceiver, and described 2nd PCIE interface connects 45GHz frequency range radio receiving-transmitting unit;
Described gigabit networking processor also includes:
Bridge modules, it is connected with gigabit ethernet interface and PCIE interface respectively, the wireless network interface corresponding with PCIE interface for managing Ethernet interface corresponding to gigabit ethernet interface, and data forwarding and the transmission of data link layer is carried out with the MAC Address of network interface for foundation;
Protocol conversion module, is connected with bridge modules, for realizing the conversion between IEEE802.11 wireless protocols and IEEE802.3 Ethernet protocol, and by the data output after conversion to bridge modules.
Further, described 2.4GHz/5.8GHz dual-band radio transceiver includes: the small-signal RF transceiver that baseband signal processor is connected with baseband signal processor, and the radio-frequency front-end being connected with small-signal RF transceiver;
Described radio-frequency front-end has N road receiving-transmitting chain, every road receiving-transmitting chain to include 5.8GHz transmission channel, 2.4GHz transmission channel, broadband 2.4GHz/5.8GHz reception passage and a radio-frequency (RF) switch; One radio-frequency (RF) switch is connected with a dual-mode antenna;
The input of described 5.8GHz transmission channel is connected with the outfan of the transmitter of small-signal RF transceiver, for the differential signal of 5.8GHz converts to single-ended signal, and exports the first transmitting terminal to radio-frequency (RF) switch;
The input of described 2.4GHz transmission channel is connected with the outfan of the transmitter of small-signal RF transceiver, for the differential signal of 2.4GHz converts to single-ended signal, and exports the second transmitting terminal to radio-frequency (RF) switch;
Described broadband 2.4GHz/5.8GHz receives the input of passage and is connected with the outfan of radio-frequency (RF) switch, the single-ended signal of 2.4GHz or 5.8GHz for radio-frequency (RF) switch being exported is easily separated, and converts the differential signal output receiver to small-signal RF transceiver respectively to;
The switch controlling signal input of radio-frequency (RF) switch is connected with the switch controlling signal outfan of baseband processor.
Further, described 45GHz frequency range radio receiving-transmitting unit includes: baseband signal processor and 45GHz RF transceiver;
Described baseband signal processor output N roadbed band signal; Described 45GHz RF transceiver includes N road receiving-transmitting chain, a frequency source and a power splitter, and every road receiving-transmitting chain includes a transmission channel, a reception passage and a radio-frequency (RF) switch; The outfan of described frequency source is connected with the input of power splitter, and power splitter at least includes 2N outfan, is connected with the I/Q manipulator on transmission channel and the i/q demodulator received on passage respectively; The input of described transmission channel is connected with a road outfan of baseband signal processor, for converting baseband signals into the microwave signal of 45GHz frequency range and exporting the transmitting terminal to radio-frequency (RF) switch; The described input of reception passage is connected with the outfan of radio-frequency (RF) switch, for the microwave signal of 45GHz frequency range converting to baseband signal and exporting to baseband signal processor; One radio-frequency (RF) switch is connected with a dual-mode antenna.
Beneficial effect:Compared with prior art, the present invention effectively utilizes the frequency resource that millimeter wave frequency band enriches very much, greatly increase the data transmission throughput of wireless communication system, 2.4GHz/5.8GHz Base Band Unit adopts IEEE802.11ac technical specification, 45GHz adopts IEEE802.11aj technical specification, and the peak rate of the wireless communication system transmitting three road spatial flows can bring up to more than 3Gbps. Can supporting six kinds of patterns of IEEE802.11b, IEEE802.11a, IEEE802.11g, IEEE802.11n, IEEE802.11ac, IEEE802.11aj, well the terminal unit of the compatible all WIFI of existing market accesses.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of mimo wireless communication network;
Fig. 2 is principles of the invention schematic diagram;
Fig. 3 is 2.4/5.8GHz radio-frequency front-end schematic diagram in Fig. 2;
Fig. 4 is 45GHz RF transceiver schematic diagram in Fig. 2;
Fig. 5 is the inventive method embodiment overview flow chart;
Fig. 6 is apparatus of the present invention example structure schematic diagrams;
Fig. 7 is network processing unit data process method schematic diagram;
Fig. 8 is radio protocol stack functional block diagram.
Detailed description of the invention
The present invention may be used for multiple system of broadband wireless communication, and the example of this communication system includes tdd mode millimeter wave wireless MIMO communication system etc.
The method of the present invention can realize in multiple wired or wireless communication device, can include access point or user terminal according to the radio node that the method in the present invention realizes.
Access point (AccessPoint, AP) base station transceiver, central station, base station, transceiver function, wireless router, transceiver, Basic Service Set (BasicServiceSet can be included, be implemented as or be called, BSS), extended service set (ExtendedServiceSet, ESS) or some other term.
User terminal (UserTerminal, UT) can include, be implemented as or be called access terminal, remote station, subscriber station, subscriber unit, movement station, user terminal, user's set, subscriber equipment or some other term.In some implementation, access terminal and can include possessing the phone of wireless connection capability, mobile phone, computer etc.
As it is shown in figure 1, have the multiple-access MIMO system of access point and user terminal. When any given when, access point can communicate with one or more user terminals on the downlink and uplink. Downlink is the communication link from access point to user terminal, and up-link is the communication link from user terminal to access point. User terminal can also be point-to-point with another user terminal communicate. System access controller is connected to access point, and provides coordination to access point and control.
Wireless MIMO communication system is tdd mode system, shares identical frequency band for TDD system, downlink and up-link.
Access point is the transmitter for downlink and the receiver for up-link. User terminal is the receiver for downlink and the transmitter for up-link. " transmitter " is able to device or the equipment of the independence operation by wireless channel transmission data as used in this article, and " receiver " is able to device or the equipment of the independence operation by wireless channel reception data.
As shown in Figure 2,3, 4, the invention discloses the principle schematic of multi-frequency multi-mode ultrahigh speed mimo wireless communication method and device. Such as Fig. 5, a kind of disclosed multi-frequency multi-mode ultrahigh speed mimo wireless communication method of the embodiment of the present invention, comprise the following steps:
(1) network processing unit of the transmitter wireless communications mode according to premises equipment requests, converts the Frame of IEEE802.3 the wireless data frame of IEEE802.11 to, and selects corresponding wireless network interface to send data.
Wherein, the data process method of network processing unit is as shown in Figure 7, wired ethernet mouth and wireless network interface can be added bridge by the network processing unit of transmitter, use the bridging technology of bridge realize wireless and wired between, wireless and wireless between and wired and wired between data high-speed forward and transmission. Bridge is also known as Bridge, by the bridge joint between port so that mutual data transmission works in data link layer, and with MAC Address for according to the forwarding and the transmission that carry out data.
Network protocol stack refers to the general name of each layer protocol in network, and the process and the data that reflect a data transmission in network forward the rule and foundation followed, such as the TCP of transportation level, udp protocol, the IP agreement of Internet, the Ethernet protocol of link layer, MAC etc. Prior art can support IEEE802.11a, IEEE802.11b, five kinds of patterns of IEEE802.11g, IEEE802.11n and IEEE802.11ac simultaneously, the consensus standard of five kinds of patterns is adopted two frequency ranges of 2.4GHz and 5.8GHz, sends data from same wireless network interface. In the inventive method, network processing unit passes through integrated IEEE802.11aj protocol stack, adopts 45GHz frequency range to send data from high-speed radio network interface.
As shown in Figure 8, IEEE802.11a/b/g/n/ac protocol stack is when receiving the frame needing to send, need Frame is carried out some radio characteristics interpolations, and the Frame of IEEE802.3 is converted to the wireless data frame of IEEE802.11, relay the transmit queue of network interface card.
Wherein radio characteristics contains:
1) ProtocolVersion:(protocol version) it is generally 0
2) Type: frame type, Frame: 10
3) Subtype: determining whether the subtype of frame, the form of different types of this field of Frame is different
3.1) IBSS frame
3.1.1)0000:Data
3.1.2)0010:Null
3.2) FromAP frame
3.2.1)0000:Data
3.2.2)1000:Data+CF+ASK
3.2.3)0100:Data+CF+Poll
3.2.4)1100:Data+CF+ACK+CF+Poll
3.2.5)1010:CF+ACK
3.2.6)0110:CF+Poll
3.2.7)1110:ACK+CF+Poll
3.3) ToAP frame
3.3.1)0000:Data
3.3.2)1000:Data+CF+ACK
3.3.3)0010:Null
3.3.4)1010:CF+ACK(nodata)
3.4) WDS frame
4) ToDS: show this frame be whether BSS to the DS frame sent time
4.1) IBSS: be set to 0
4.2) ToAP: be set to 1
4.3) FromAP: be set to 0
4.4) WDS: be set to 1
5) FromDS: show this frame be whether DS to the BSS frame sent time
5.1) IBSS: be set to 0
5.2) ToAP: be set to 0
5.3) FromAP: be set to 1
5.4) WDS: be set to 1
6) MoreFragment: for the situation that long frame is segmented is described, if also having other frame, if had, this value is set to 1
7) Retry (re-transmission territory): represent that this segmentation is the repeating transmission frame of precedent transmission segmentation.
8) PowerManagement: after representing transmission frame, the powder source management mode adopted of standing
8.1) it is in power_save pattern for 1:STA
8.2) it is in active pattern for 0:STA
9) MoreData: in indicating that a lot of frame buffer is arrived at a station. Namely at least also have a Frame to be sent to STA and be arranged to 1.
10) ProtectedFrame: represent and according to WEP (WiredEquivalentPrivacy) algorithm, frame main body is encrypted. If body section comprises the data processed by key set, then it is set to 1, is otherwise provided as 0
11) Order (sequence number field): when long frame segmentation transmits, this territory is set to 1 expression receiver in strict accordance with this frame of sequential processing, should be otherwise provided as 0
IEEE802.11aj protocol stack is to modify according to IEEE802.11aj protocol contents on the basis of IEEE802.11a/b/g/n/ac protocol stack. Main difference has the length of the service data unit field of media access control layer, the length of aggregated service data unit field, and amendment dynamic bandwidth mechanism supports 540MHz or 1080MHz channel width.
(2) when wireless communications mode is a kind of in IEEE802.11a, IEEE802.11b, IEEE802.11g, IEEE802.11n and IEEE802.11ac, information source data are carried out according to corresponding wireless mode base band signal process and rf modulations, produce the maximum N road spatial flow signal of 2.4GHz or 5.8GHz frequency range, send data by N number of radio-frequency antenna. (radio frequency band that 5 kinds of communication patterns are corresponding here is: IEEE802.11b, IEEE802.11g are 2.4GHz; IEEE802.11a, IEEE802.11ac are 5.8GHz; IEEE802.11n is 2.4GHz or 5.8GHz). Concrete steps include:
(2.1) information source data are sequentially carried out coding, modulation, spatial spread and digital simulation signal conversion processes, produce N road base-band analog signal;
(2.2) every road base-band analog signal is sequentially carried out amplification, I/Q modulation and small-power amplify, produces the differential signal of 2.4GHz or 5.8GHz;
(2.3) convert every road differential signal coupling to single-ended 50 ohmage signals, then output, to the transmitting terminal of corresponding radio-frequency (RF) switch, exports to respective antenna from the antenna connection terminal of radio-frequency (RF) switch, sends data by antenna after being filtered and amplifying.
(3), when wireless communications mode is IEEE802.11aj, information source data is carried out base band signal process and microwave frequency band modulation, produces the maximum N road spatial flow signal of 45GHz frequency range, send data by N number of microwave frequency band antenna. Concrete steps include:
(3.1) information source data are sequentially carried out coding, modulation, spatial spread and digital simulation signal conversion processes, produce N road base-band analog signal;
(3.2) every road base-band analog signal is sequentially carried out filtering, variable gain is amplified and I/Q modulation, produce the microwave signal of 45GHz frequency range, microwave signal carries out signal and amplifies the output transmitting terminal to corresponding radio-frequency (RF) switch, export to respective antenna from the antenna connection terminal of radio-frequency (RF) switch, send data by antenna;
(4) after receiver receives the spatial flow signal of maximum N road 2.4GHz or 5.8GHz frequency range from N number of radio-frequency antenna, carry out radio demodulating and base band signal process, recover the information source data that transmitter sends. Concrete steps include:
(4.1) 2.4GHz or the 5.8GHz signal that every road radio-frequency (RF) switch exports being carried out wideband low noise amplification, output to diplexer separates goes out 2.4GHz and 5.8GHz single-ended signal;
(4.2) convert every road single-ended signal coupling to differential signal, then carry out radiofrequency signal amplification, I/Q solve be in harmonious proportion amplify after output base-band analog signal;
(4.3) base-band analog signal is sequentially carried out analog and digital signal conversion, mimo channel is estimated, mimo channel is balanced, solution mediation decoding processes, and recovers the information source data that transmitter sends.
(5), after receiver receives the spatial flow signal of maximum N road 45GHz frequency range from N number of microwave frequency band antenna, carry out microwave frequency band solution mediation base band signal process, recover the information source data that transmitter sends. Concrete steps include:
(5.1) the 45GHz signal that every road radio-frequency (RF) switch exports is sequentially carried out low noise amplification, variable gain is amplified and after I/Q demodulation, then the I/Q two paths of signals of analog baseband signal is carried out variable gain amplification and filtering respectively;
(5.2) analog baseband signal is sequentially carried out analog and digital signal conversion, mimo channel is estimated, mimo channel is balanced, solution mediation decoding processes, and recovers the information source data that transmitter sends.
(6) wireless data frame of IEEE802.11 is converted to the Frame of IEEE802.3 by the network processing unit of receiver, and Frame is forwarded to Ethernet interface.
As shown in Figure 8, after network processing unit receives data, it is first sent to corresponding radio protocol stack. Frame is carried out after related legitimate inspection by radio protocol stack, then removes wireless protocols frame head and lays equal stress on newly added according to the IEEE802.3 Ethernet frame head encapsulated, finally uploads to network protocol stack. The MAC forwarding-table item of wireless network interface advanced person's row bridge of bridge member is inquired about by network protocol stack, then carries out the data single broadcasting in bridge group or broadcast transmission according to Query Result.
When IEEE802.11a/b/g/n/ac protocol stack receives frame, need frame is carried out type judgement, if what receive is that Frame needs the IEEE802.11 frame header of Frame is carried out some radio characteristics verifications, and source address corresponding to the source address in IEEE802.11 frame is copied to destination address Ethernet packet header and destination address, and the Frame after conversion is put into next layer protocol stack processes, if what receive is not Frame, then non-data frame is done and is processed and send corresponding state accordingly by the type specified according to agreement, non-data frame contains management frame and control frame, wherein management frame comprises again Associationrequest(association request), Associationresponse(associated response), Reassociationrequest(is association request again), Reassociationresponse(is associated response again), Proberequest(probe requests thereby), Proberesponse(probe response), Beacon(beacon), ATIM(notification transmission instruction message), Disassociation(cancels association), Authentication(authentication) and Deauthentication(releasing authentication) etc., control frame comprises again PowerSave(PS)-Poll(power saving-poll), RTS(asks to send), CTS(clear to send), ACK(confirms), CF-End(uncontended periods terminates) and CF-End(uncontended periods terminate) confirmation of+CF-ACK(uncontended periods) etc.
IEEE802.11aj protocol stack is to modify according to IEEE802.11aj protocol contents on the basis of IEEE802.11a/b/g/n/ac protocol stack.
As shown in Figure 6, the embodiment of the invention discloses a kind of multi-frequency multi-mode ultrahigh speed mimo wireless communication device adopting said method, including a gigabit networking processor, gigabit networking processor has two high-speed PCI E interface, and a PCIE interface connects 2.4GHz/5.8GHz dual-band radio transceiver;Another PCIE interface connects 45GHz frequency range IEEE802.11aj radio receiving-transmitting unit. In order to mate the speed of radio port, gigabit networking processor also has at least two gigabit ethernet interfaces. Gigabit networking processor also includes: for managing the wireless network interface that Ethernet interface corresponding to gigabit ethernet interface is corresponding with PCIE interface, and with the MAC Address of network interface for the bridge modules according to the data forwarding and transmission that carry out data link layer; And for realizing the conversion between IEEE802.11 wireless protocols and IEEE802.3 Ethernet protocol, and by the data output after conversion to bridge modules, carry out, by bridge modules, the protocol conversion module that the data between Ethernet interface and wireless network interface are transmitted.
Wherein, 2.4GHz/5.8GHz dual-band radio transceiver includes baseband signal processor, small-signal RF transceiver and radio-frequency front-end.
The transmission channel of baseband signal processor process be information source data be encoded, modulate, spatial spread, digital analogue signal conversion etc. process, receive passage and process process such as including analog and digital signal conversion, mimo channel estimation, mimo channel equilibrium, demodulation, decoding.
The transmitter of small-signal RF transceiver is that base-band analog signal baseband processor exported amplifies output small-power radiofrequency signal by amplification, I/Q modulation, small-power.
The receiver of small-signal RF transceiver is to export base-band analog signal to baseband processor after receiving radiofrequency signal amplification, I/Q demodulation, amplification.
Radio-frequency front-end has N road receiving-transmitting chain, every road receiving-transmitting chain to include 5.8GHz transmission channel, 2.4GHz transmission channel, and broadband 2.4GHz/5.8GHz receives passage and a radio-frequency (RF) switch.
As shown in Figure 3,5.8GHz transmission channel includes 5.8GHz transmitting coupling and difference turns single-end circuit, wave filter and power amplifier, differential signal coupling is converted to single-ended 50 ohmage signals after the differential output signal of the 5.8GHz of 5.8GHz transmission channel reception small-signal RF transceiver, connection wave filter carries out spurious signal and filters, then input power amplifier carries out signal amplification, and power amplifier output signal connects the TX1 end of radio-frequency (RF) switch. 2.4GHz transmission channel includes 2.4GHz transmitting coupling and difference turns single-end circuit, wave filter and power amplifier, differential signal coupling is converted to single-ended 50 ohmage signals after the differential output signal of the 2.4GHz of 2.4GHz transmission channel reception small-signal RF transceiver, connection wave filter carries out spurious signal and filters, then input power amplifier carries out signal amplification, and power amplifier output signal connects the TX2 end of radio-frequency (RF) switch. broadband 2.4GHz/5.8GHz receives passage and includes 5.8GHz transmitting coupling and single-ended transfer difference circuit, 2.4GHz launches coupling and single-ended transfer difference circuit, duplexer and wideband low noise amplifier, 2.4GHz or the 5.8GHz signal of the wideband low noise amplifier reception radio-frequency (RF) switch output that broadband 2.4GHz/5.8GHz receives passage carries out low noise amplification, then input diplexer separates goes out 2.4GHz and 5.8GHz signal, 2.4GHz signal single-ended transfer difference signal input small-signal RF transceiver, 5.8GHz signal single-ended transfer difference signal input small-signal RF transceiver. it is used herein as a wide-band passage, receives and process the signal of 2.4GHz or 5.8GHz, it is possible to effectively save cost. radio-frequency (RF) switch controls antenna port according to the switch controlling signal that baseband processor exports and switches at 2.4GHz transmitting terminal, 5.8GHz transmitting terminal, 2.4GHz/5.8GHz receiving terminal.
2.4GHz/5.8GHz radio-frequency front-end has a N road receiving-transmitting chain, maximum can transmit N road spatial flow signal.
45GHz frequency range radio receiving-transmitting unit includes baseband signal processor and 45GHz RF transceiver.
Baseband signal processor includes media access control unit, transmitter baseband signal processing unit, receiver machine baseband signal processing unit, controller, digital analog converter and analog-digital converter. Transmitter baseband signal processing unit according to 45GHz wireless channel transmission characteristic be information source data be encoded, modulate, spatial spread, digital analogue signal conversion etc. process and produce N road baseband output signal, transmission N roads spatial flow signal at most. Receiver baseband signal processing unit includes analog and digital signal conversion and processes the information source data recovering transmitter transmission according to the mimo channel estimation of 45GHz wireless channel transmission characteristic design, mimo channel equilibrium, demodulation, decoding etc.
As shown in Figure 4, 45GHz RF transceiver adopts directly modulation and the single-conversion scheme of directly demodulation, including N road receiving-transmitting chain and a frequency source (optional frequency 45GHz/4 frequency range for local oscillator, connect 4 doubler and frequency source is externally provided), frequency source converts the output of 2N road to by power splitter and is supplied to the receiving-transmitting chain frequency conversion use of N road, every road receiving-transmitting chain includes a transmission channel, one receives passage and a radio-frequency (RF) switch, one radio-frequency (RF) switch is connected wherein transmission channel and receives the I/Q two-way analog baseband signal post filtering of digital analog converter output with a dual-mode antenna, variable gain is amplified, then input I/Q manipulator, the microwave signal of I/Q manipulator output 45GHz frequency range, then input power amplifier carries out signal amplification, power amplifier output signal connects the TX end of radio-frequency (RF) switch. the 45GHz signal receiving the output of channel reception radio-frequency (RF) switch first carries out low noise amplification, then input variable gain amplifier is amplified, the output of variable gain amplifier connects the input of i/q demodulator, the radiofrequency signal of 45GHz is down-converted to analog baseband signal by i/q demodulator, and the I/Q two paths of signals of output carries out variable gain amplification, filtering respectively.
The N road receiving-transmitting chain of 45GHz RF transceiver is maximum can transmit N road spatial flow signal.
The QCA9882 of WIFI baseband processor and the optional Qualcomm of RF transceiver (Qualcomm) or Qualcomm QCA9880's or company of Botong (Broadcom) BCM4352, the IPQ8068 of the optional Qualcomm of network processing unit (Qualcomm) in Fig. 2.
45GHz frequency range IEEE802.11aj Base-Band Processing and media control to use Xilinx4 sheet large-scale F PGAVirtex6 to realize.
The above is only the preferred embodiment of the present invention, and for those skilled in the art, under the premise without departing from the principles of the invention, any amendment, equivalent replacement, the improvement etc. made also should be regarded as protection scope of the present invention.
Claims (6)
1. a multi-frequency multi-mode ultrahigh speed mimo wireless communication method, it is characterised in that: the data sending step of described communication means includes:
The transmitter wireless communications mode according to premises equipment requests, converts the Frame of IEEE802.3 the wireless data frame of IEEE802.11 to, and selects corresponding wireless network interface to send data;
When wireless communications mode is a kind of in IEEE802.11a, IEEE802.11b, IEEE802.11g, IEEE802.11n and IEEE802.11ac, information source data are carried out according to corresponding wireless mode base band signal process and rf modulations, produce the maximum N road spatial flow signal of 2.4GHz or 5.8GHz frequency range, send data by N number of radio-frequency antenna;
When wireless communications mode is IEEE802.11aj, information source data is carried out base band signal process and microwave frequency band modulation, produces the maximum N road spatial flow signal of 45GHz frequency range, send data by N number of microwave frequency band antenna;
Data reception step includes:
After receiver receives the spatial flow signal of maximum N road 2.4GHz or 5.8GHz frequency range from N number of radio-frequency antenna, carry out radio demodulating and base band signal process, recover the information source data that transmitter sends;
After receiver receives the spatial flow signal of maximum N road 45GHz frequency range from N number of microwave frequency band antenna, carry out microwave frequency band solution mediation base band signal process, recover the information source data that transmitter sends;
Receiver converts the wireless data frame of IEEE802.11 the Frame of IEEE802.3 to, and Frame is forwarded to Ethernet interface;
Above-mentioned N is the natural number be more than or equal to 1.
2. multi-frequency multi-mode ultrahigh speed mimo wireless communication method according to claim 1, it is characterized in that, described information source data are carried out according to corresponding wireless mode base band signal process and rf modulations, producing the maximum N road spatial flow signal of 2.4GHz or 5.8GHz frequency range, the concrete steps being sent data by N number of radio-frequency antenna are included:
Information source data are sequentially carried out coding, modulation, spatial spread and digital simulation signal conversion processes, produce N road base-band analog signal;
Every road base-band analog signal is sequentially carried out amplification, I/Q modulation and small-power amplify, produces the differential signal of 2.4GHz or 5.8GHz;
Convert every road differential signal coupling to single-ended 50 ohmage signals, then output, to the transmitting terminal of corresponding radio-frequency (RF) switch, exports to respective antenna from the antenna connection terminal of radio-frequency (RF) switch, sends data by antenna after being filtered and amplifying;
After described receiver receives the spatial flow signal of maximum N road 2.4GHz or 5.8GHz frequency range from N number of radio-frequency antenna, carrying out radio demodulating and base band signal process, the concrete steps recovering the information source data that transmitter sends include:
2.4GHz or the 5.8GHz signal that every road radio-frequency (RF) switch exports carries out wideband low noise amplification, and output to diplexer separates goes out 2.4GHz and 5.8GHz single-ended signal;
Convert every road single-ended signal coupling to differential signal, then carry out radiofrequency signal amplification, I/Q solve be in harmonious proportion amplify after output base-band analog signal;
Base-band analog signal is sequentially carried out analog and digital signal conversion, mimo channel is estimated, mimo channel is balanced, solution mediation decoding processes, and recovers the information source data that transmitter sends.
3. multi-frequency multi-mode ultrahigh speed mimo wireless communication method according to claim 1, it is characterized in that, described information source data are carried out base band signal process and microwave frequency band modulation, producing the maximum N road spatial flow signal of 45GHz frequency range, the concrete steps being sent data by N number of microwave frequency band antenna are included:
Information source data are sequentially carried out coding, modulation, spatial spread and digital simulation signal conversion processes, produce N road base-band analog signal;
Every road base-band analog signal is sequentially carried out filtering, variable gain is amplified and I/Q modulation, produce the microwave signal of 45GHz frequency range, microwave signal carries out signal and amplifies the output transmitting terminal to corresponding radio-frequency (RF) switch, export to respective antenna from the antenna connection terminal of radio-frequency (RF) switch, send data by antenna;
After described receiver receives the spatial flow signal of maximum N road 45GHz frequency range from N number of microwave frequency band antenna, carrying out microwave frequency band solution mediation base band signal process, the concrete steps recovering the information source data that transmitter sends include:
The 45GHz signal that every road radio-frequency (RF) switch exports is sequentially carried out low noise amplification, variable gain is amplified and I/Q demodulation obtains analog baseband signal, then the I/Q two paths of signals of analog baseband signal is carried out variable gain amplification and filtering respectively;
Analog baseband signal is sequentially carried out analog and digital signal conversion, mimo channel is estimated, mimo channel is balanced, solution mediation decoding processes, and recovers the information source data that transmitter sends.
4. the device adopting multi-frequency multi-mode ultrahigh speed mimo wireless communication method according to claim 1, it is characterized in that, including a gigabit networking processor, described gigabit networking processor includes a PCIE interface, the 2nd PCIE interface and at least two gigabit ethernet interface, a described PCIE interface connects 2.4GHz/5.8GHz dual-band radio transceiver, and described 2nd PCIE interface connects 45GHz frequency range radio receiving-transmitting unit;
Described gigabit networking processor also includes:
Bridge modules, it is connected with gigabit ethernet interface and PCIE interface respectively, the wireless network interface corresponding with PCIE interface for managing Ethernet interface corresponding to gigabit ethernet interface, and data forwarding and the transmission of data link layer is carried out with the MAC Address of network interface for foundation;
Protocol conversion module, is connected with bridge modules, for realizing the conversion between IEEE802.11 wireless protocols and IEEE802.3 Ethernet protocol, and by the data output after conversion to bridge modules.
5. multi-frequency multi-mode ultrahigh speed mimo wireless communication device according to claim 4, it is characterized in that, described 2.4GHz/5.8GHz dual-band radio transceiver includes the small-signal RF transceiver that baseband signal processor is connected and the radio-frequency front-end being connected with small-signal RF transceiver with baseband signal processor; Described radio-frequency front-end has N road receiving-transmitting chain, every road receiving-transmitting chain to include 5.8GHz transmission channel, 2.4GHz transmission channel, broadband 2.4GHz/5.8GHz reception passage and a radio-frequency (RF) switch; One radio-frequency (RF) switch is connected with a dual-mode antenna;
The input of described 5.8GHz transmission channel is connected with the outfan of the transmitter of small-signal RF transceiver, for the differential signal of 5.8GHz converts to single-ended signal, and exports the first transmitting terminal to radio-frequency (RF) switch;
The input of described 2.4GHz transmission channel is connected with the outfan of the transmitter of small-signal RF transceiver, for the differential signal of 2.4GHz converts to single-ended signal, and exports the second transmitting terminal to radio-frequency (RF) switch;
Described broadband 2.4GHz/5.8GHz receives the input of passage and is connected with the outfan of radio-frequency (RF) switch, the single-ended signal of 2.4GHz or 5.8GHz for radio-frequency (RF) switch being exported is easily separated, and converts the differential signal output receiver to small-signal RF transceiver respectively to;
The switch controlling signal input of radio-frequency (RF) switch is connected with the switch controlling signal outfan of baseband processor.
6. multi-frequency multi-mode ultrahigh speed mimo wireless communication device according to claim 4, it is characterised in that described 45GHz frequency range radio receiving-transmitting unit includes baseband signal processor and 45GHz RF transceiver; Described baseband signal processor output N roadbed band signal; Described 45GHz RF transceiver includes N road receiving-transmitting chain, a frequency source and a power splitter, and every road receiving-transmitting chain includes a transmission channel, a reception passage and a radio-frequency (RF) switch; The outfan of described frequency source is connected with the input of power splitter, and power splitter at least includes 2N outfan, is connected with the I/Q manipulator on transmission channel and the i/q demodulator received on passage respectively; The input of described transmission channel is connected with a road outfan of baseband signal processor, for converting baseband signals into the microwave signal of 45GHz frequency range and exporting the transmitting terminal to radio-frequency (RF) switch;The described input of reception passage is connected with the outfan of radio-frequency (RF) switch, for the microwave signal of 45GHz frequency range converting to baseband signal and exporting to baseband signal processor; One radio-frequency (RF) switch is connected with a dual-mode antenna.
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