CN104135294A - E-waveband wireless transmission signal generating equipment - Google Patents
E-waveband wireless transmission signal generating equipment Download PDFInfo
- Publication number
- CN104135294A CN104135294A CN201410398089.1A CN201410398089A CN104135294A CN 104135294 A CN104135294 A CN 104135294A CN 201410398089 A CN201410398089 A CN 201410398089A CN 104135294 A CN104135294 A CN 104135294A
- Authority
- CN
- China
- Prior art keywords
- module
- digital
- frame
- signal
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention relates to E-waveband wireless transmission signal generating equipment. An Ethernet frame is converted into a media access frame through a high-speed Ethernet interface, and is connected to a digital baseband processing module; the digital baseband processing module is used for finishing data coding, mapping the coded data into a digital character, encapsulating the data into an E-waveband frame structure and finishing shaping filtering and rate conversion through a transmission filtering module, and is connected to a digital medium-frequency module; and the digital medium-frequency module is used for converting a digital baseband signal into a digital medium-frequency signal, inputting the digital medium-frequency signal into a DAC (Digital-to-Analog Converter) and a radio frequency front end, generating an E-waveband wireless transmission signal, and transmitting the E-waveband wireless transmission signal through an E-waveband antenna. The E-waveband wireless transmission signal generating equipment is compatible with a plurality of modulation ways, and meets the requirement of high-rate transmission.
Description
Technical field
The present invention relates to E wave band high-speed radio transmission technique field, particularly relate to a kind of E wave band wireless signal transmission and produce equipment.
Background technology
Microwave is common wireless communication technology, its have long transmission distance, capacity large, dispose the features such as quick, anti-damage is strong, be widely used in relaying and the passback of communication system.Flourish along with the universal and mobile Internet of intelligent mobile terminal in recent years, wireless data service presents explosive growth, and the frequency spectrum resource of conventional 6GHz～38GHz is approach exhaustion, and microwave communication will be towards more high band expansion.E band microwave frequency range will be the main solution of following cellular radio passback.
E wave band is the microwave frequency band frequency spectrum resource of the channel spacing maximum of the wireless tissue of International Telecommunication Association (ITU-R) disposable issue up to now.By 71GHz～76GHz and 81GHz～86GHz frequency spectrum resource, formed, can carry the above high-speed radio transport service of G bit.Europe electronic communications committee (ECC) to the suggestion of E wave band frequency range is: minimum channel spacing is 250MHz, whole 5GHz can be divided into 19 frequency sub-band by modulation frequency range, during transport service, can use 1～4 sub-frequency range combination, adjustable channel spacing is 1GHz to the maximum, while adopting high-order modulating, E band microwave can realize the high power capacity transmission of 1～5Gbps.
In recent years, along with rapid deployment and the development of LTE, cellular radio return network faces more and more serious frequency deviation deficit problem.Along with proposition and the research of 5G communication requirement, the deficient problem of return network frequency spectrum will be severeer.The application of E band microwave makes to carry future wireless system business demand and is called possibility.At present, many countries have opened the use restriction of E wave band frequency range, various countries scientific research institution and organizing all in test and the research and development actively developed for the E wave band high-speed radio transmission equipment of wireless backhaul network of future generation.The problem partly facing in E band transmission equipment Base-Band Processing at present is mainly to comprise coding, modulation, digital base band processor speed such as molding filtration and Digital Up Convert and penetrate inclined to one side front end analogue device characteristic and cannot meet E band transmission device demand more than 10Gbps.
At high-speed radio transmission field, there is serious frequency spectrum deficit problem.Wireless communication technology as common, has long transmission distance, and capacity is large, disposes soon, and the feature that anti-damage is strong, in the extensive use of high-speed radio transmission field.But the microwave spectrum of conventional 6GHz～38GHz is approach exhaustion, need to be to higher band spreading.IEEE802.11ad standard regulation works in 60GHz frequency range, the highest 7Gbps rate communication of realizing.This standard has been the flank speed that existing standard is supported, however still with the goal discrepancy of 10-100Gbps " wireless optical fiber " apart from huge, also exist simultaneously transmission range near, disturb the shortcomings such as large, frequency spectrum resource is deficient.Along with the development of LTE/LTE-Advanced, at following 4G, B4G is under the epoch, and existing standard far can not meet the demand of wireless backhaul network.Future wireless system, particularly high-speed radio transmission, need to open up new frequency spectrum to realize new demand.
E wave band is the widest frequency spectrum resource that ITU distributes up to now, has the continuous frequency spectrum of two 5GHz, is respectively 71-76GHz and 81-86GHz, can solve well frequency spectrum deficit problem.Super wide frequency spectrum resource makes it can realize high transmission rate in theory.Owing to there being sufficient protection interval, it is very little that E band transmission device is subject to the interference of other frequency band signals, easily realizes noiseless transmission.This frequency range also has the environment little feature that declines, and makes E wave band wireless transmitting system be adapted to medium and long distance transmission, is the main solution of following cellular radio passback, and the upgrading that can be used as traditional microwave access with substitute.
Yet E wave band wireless transmitting system framework still can follow without standard at present, the generation of E band signal, coded system, high speed filtering, all there is the problem of a series of speed and efficiency aspect in radiofrequency signal generation etc., only rests on the experimental study stage, and attainable signal generating apparatus is still very deficient.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of E wave band wireless signal transmission and produces equipment, can realize the conversion from Fast Ethernet to E waveband radio frequency microwave signal, and compatible Different Modulations, and meets high rate data transmission demand.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of E wave band wireless signal transmission to produce equipment, comprise that Fast Ethernet interface, digital base band processor module, digital intermediate frequency module, global clock control module, multichannel analog intermediate frequency merge module, RF front-end module and duplexer; Described Fast Ethernet interface accesses frame for the Ether frame of Fast Ethernet being converted into parallel media, and outputs to described digital base band processor module; Described digital base band processor module comprises: digital coding module, obtains parallel multi-channel coding signal for completing multi-channel coding; Modulation mapping block, modulates code signal, and after modulation, data acquisition represents with a plurality of bits, and real part and imaginary part adopt identical mapping relations to represent; Become frame module, for the data to after modulation, complete interpolation and the insertion of header sequence and pilot frequency sequence; Send filtration module, for completing molding filtration and rate transition, and insert targeting sequencing, obtain parallel digital baseband signal, and output to described digital intermediate frequency module; Described digital intermediate frequency module is for being converted into digital medium-frequency signal by Parallel Digital baseband signal; Described multichannel analog intermediate frequency merges module for multichannel analog intermediate-freuqncy signal is merged into unified analog if signal; Described RF front-end module up-converts to E band microwave signal by digital medium-frequency signal, and sends to described duplexer, by duplexer, is launched; Described global clock control module, synchronous for controlling all modules of E wave band wireless signal transmission generation equipment.
Described Fast Ethernet interface is converted into parallel PHY frame by the Ether frame of Fast Ethernet, and then is converted into parallel mac frame.
Described digital coding module adopts BCH, RS or LDPC coded system to complete binary channels or multi-channel coding.
The compatible BPSK/QPSK/MQAM modulation system of described modulation mapping block.
Described transmission filtration module is realized molding filtration and rate transition by look-up table and multiphase filtering mode, and wherein, data search matrix section adopts look-up table, and leading part adopts pre-stored method.
Described one-tenth frame module state machine when data flow is exported represents: be divided into halted state, header sequence state and data mode.Beneficial effect
Owing to having adopted above-mentioned technical scheme, the present invention compared with prior art, has following advantage and good effect: the present invention is converted into media access frame by Fast Ethernet interface by Ether frame, and is connected to digital base band processor module; By digital base band processor module, complete data encoding, and be numerical chracter by data-mapping after coding, encapsulate data into E wave band frame structure, then complete molding filtration and rate transition by sending filtration module, and be connected to digital intermediate frequency module; Digital intermediate frequency module is converted into digital medium-frequency signal by digital baseband signal, and is input to DAC and radio-frequency front-end, produces E wave band wireless signal transmission, and is launched by E wave band antenna, and it is compatible Different Modulations not only, and meets high rate data transmission demand.
Accompanying drawing explanation
Fig. 1 is the general frame of the present invention;
Fig. 2 is digital base band processor module and digital intermediate frequency module frame chart in the present invention;
Fig. 3 is global clock control module schematic diagram in the present invention;
Fig. 4 is that in the present invention, coder module realizes block diagram;
Fig. 5 becomes frame module to realize block diagram in the present invention;
Fig. 6 is framing module status machine structure chart in the present invention;
Fig. 7 sends filtration module to realize block diagram in the present invention;
Fig. 8 is that in the present invention, digital intermediate frequency module realizes block diagram.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read the content of the present invention's instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiments of the present invention relate to a kind of E wave band wireless signal transmission and produce equipment, as depicted in figs. 1 and 2, comprise that Fast Ethernet interface, digital base band processor module, digital intermediate frequency module, global clock control module, multichannel analog intermediate frequency merge module, RF front-end module and duplexer; Described Fast Ethernet interface accesses frame for the Ether frame of Fast Ethernet being converted into parallel media, and outputs to described digital base band processor module; Described digital base band processor module comprises: digital coding module, obtains parallel multi-channel coding signal for completing multi-channel coding; Modulation mapping block, modulates code signal, and after modulation, data acquisition represents with a plurality of bits, and real part and imaginary part adopt identical mapping relations to represent; Become frame module, for the data to after modulation, complete interpolation and the insertion of header sequence and pilot frequency sequence; Send filtration module, for completing molding filtration and rate transition, and insert targeting sequencing, obtain parallel digital baseband signal, and output to described digital intermediate frequency module; Described digital intermediate frequency module is for being converted into digital medium-frequency signal by Parallel Digital baseband signal; Described multichannel analog intermediate frequency merges module for multichannel analog intermediate-freuqncy signal is merged into unified analog if signal; Described RF front-end module up-converts to E band microwave signal by digital medium-frequency signal, and sends to described duplexer, by duplexer, is launched, and duplexer can switch in two 5GHz bandwidth of E wave band, distinguishes receiving and transmitting signal; Described global clock control module, synchronous for controlling all modules of E wave band wireless signal transmission generation equipment.
As shown in Figure 3, the definition of the global clock control module input port in the present embodiment is respectively: the frequency of input clock 16 is 312.5MHz; Reset signal end 17; Input enable signal end 18.The definition of output port is respectively: frame start signal end 19, and every frame is once; Header sequence initial signal end 20, every frame is once; Event counter 21 in frame, each clock increase once.
As shown in Figure 4, the coding module in the present embodiment, adopts BCH, RS, and the coded systems such as LDPC complete binary channels or multi-channel coding, and work clock is 166.67MHz.When encoding, first reading out data in FIFO22, the cycle of the enable signal bch_fifo_rd (23) of read data is with reference to the definition of frame_mod, the data that obtain are delivered to the parallel encoder in 6 tunnels, complete twin-channel coding, finally the data after coding are write to the FIFO of next stage.
As shown in Table 1 and Table 2, the Different Modulations such as the compatible BPSK/QPSK/MQAM of the present embodiment, wherein the possible value of M is 16,32,64 ..., support various lofty tone modes.In the present embodiment, take 16QAM as example.For unified BPSK, QPSK and 16QAM, the data after modulation are represented with 6bit, real part and imaginary part adopt identical mapping relations, and each represents with 3bit.
The mapping table of table 116QAM and BPSK
Table 2QPSK mapping table
As shown in Figure 5, in the present embodiment, become frame module to complete the interpolation of header sequence (Header) and pilot frequency sequence (Pilot), and all data are transferred to transmission filtration module with the form of 6 channel parallel datas streams.This module is mainly comprised of bit width conversion 25 and 26 two parts of framing.
As shown in Figure 6, in the present embodiment, during the output of framing module data stream, can represent with this state machine: be divided into and stop 27,29 3 states of header sequence 28 and data.When initial in halted state, when header_start rising edge arrives, state machine enters header sequence state, start to transmit header data, header_counter is since 0 counting simultaneously, whole header length is 48 symbols, because 6 roads walk abreast, so need altogether 8 clock cycle, when header_counter=7, state machine jumps to data mode, start the IQ data after transmission modulation, data_counter is since 0 counting simultaneously, when data_counter counts 863, one frame data end of transmission, state machine enters halted state, wait for the arrival of header_start next time.
As shown in Figure 7, in the present embodiment, send filtration module and adopt a kind of zero multiplication based on look-up table to realize, be intended to the rate transition on molding filtration and 6 Zhi16 roads, road, and added targeting sequencing (Preamble).Input Frame_data_real (30) and Frame_data_imag (31) are respectively I, Q two paths of data frame, and the pattern that Frame_mod (31) is incoming frame, Frame_start (32) is Frame opening flag.Be output as the I having inserted after targeting sequencing molding filtration, Q two paths of signals filter_real_out (33) and filter_imag_out (34).Module input clock clk (35) is 312.5MHz, and data look-up table 36 parts adopt look-up table, and leading part 37 adopts pre-stored method, finally by output control module 38, controls output timing.
As shown in Figure 8, digital intermediate frequency module in the present embodiment, Digital Up Convert module 39 and parallel serial conversion module 40 annexations are as figure.The frequency of Digital Up Convert module input clock clk_312.5 is 312.5MHz, is input as I, and Q two-way complex signal is respectively filter_real_out (42) and filter_imag_out (43), the parallel input in Fen16 road.In the present embodiment, Digital Up Convert module is output as 16 tunnel Parallel Digital real signals, and carrier frequency is 1.25GHz.In the present embodiment, the frequency of parallel serial conversion module input clock clk_625 (44) is 625MHz, is output as 4 tunnel difference outputs (45), and every road is 12bit, outputs in high-speed DAC.
In the present embodiment, high-speed DAC is output as binary channels analog if signal.Through multichannel analog intermediate frequency, merge module, double-channel signal is merged, form analog if signal.Pass through again RF front-end module, generate E waveband radio frequency signal.Final through duplexer and E wave band antenna, the E wave band wireless signal transmission that generation can be transmitted.
Claims (6)
1. E wave band wireless signal transmission produces an equipment, it is characterized in that, comprises that Fast Ethernet interface, digital base band processor module, digital intermediate frequency module, global clock control module, multichannel analog intermediate frequency merge module, RF front-end module and duplexer; Described Fast Ethernet interface accesses frame for the Ether frame of Fast Ethernet being converted into parallel media, and outputs to described digital base band processor module; Described digital base band processor module comprises: digital coding module, obtains parallel multi-channel coding signal for completing multi-channel coding; Modulation mapping block, modulates code signal, and after modulation, data acquisition represents with a plurality of bits, and real part and imaginary part adopt identical mapping relations to represent; Become frame module, for the data to after modulation, complete interpolation and the insertion of header sequence and pilot frequency sequence; Send filtration module, for completing molding filtration and rate transition, and insert targeting sequencing, obtain parallel digital baseband signal, and output to described digital intermediate frequency module; Described digital intermediate frequency module is for being converted into digital medium-frequency signal by Parallel Digital baseband signal; Described multichannel analog intermediate frequency merges module for multichannel analog intermediate-freuqncy signal is merged into unified analog if signal; Described RF front-end module up-converts to E band microwave signal by digital medium-frequency signal, and sends to described duplexer, by duplexer, is launched; Described global clock control module, synchronous for controlling all modules of E wave band wireless signal transmission generation equipment.
2. E wave band wireless signal transmission according to claim 1 produces equipment, it is characterized in that, described Fast Ethernet interface is converted into parallel PHY frame by the Ether frame of Fast Ethernet, and then is converted into parallel mac frame.
3. E wave band wireless signal transmission according to claim 1 produces equipment, it is characterized in that, described digital coding module adopts BCH, RS or LDPC coded system to complete binary channels or multi-channel coding.
4. E wave band wireless signal transmission according to claim 1 produces equipment, it is characterized in that, the compatible BPSK/QPSK/MQAM modulation system of described modulation mapping block.
5. E wave band wireless signal transmission according to claim 1 produces equipment, it is characterized in that, described transmission filtration module is realized molding filtration and rate transition by look-up table and multiphase filtering mode, wherein, data search matrix section adopts look-up table, and leading part adopts pre-stored method.
6. E wave band wireless signal transmission according to claim 1 produces equipment, it is characterized in that, described one-tenth frame module state machine when data flow is exported represents: be divided into halted state, header sequence state and data mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410398089.1A CN104135294B (en) | 2014-08-13 | 2014-08-13 | A kind of E Band wireless transmission signal generating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410398089.1A CN104135294B (en) | 2014-08-13 | 2014-08-13 | A kind of E Band wireless transmission signal generating apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104135294A true CN104135294A (en) | 2014-11-05 |
| CN104135294B CN104135294B (en) | 2016-08-24 |
Family
ID=51807847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410398089.1A Active CN104135294B (en) | 2014-08-13 | 2014-08-13 | A kind of E Band wireless transmission signal generating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104135294B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471801A (en) * | 2015-12-02 | 2016-04-06 | 中国电子科技集团公司第四十一研究所 | 5G mobile communication digital modulating signal generation device and generation method thereof |
| CN107863987A (en) * | 2017-12-21 | 2018-03-30 | 中国电子科技集团公司第五十四研究所 | A kind of ultra wide band E band transceivers |
| CN111641418A (en) * | 2020-05-07 | 2020-09-08 | 中国电子科技集团公司电子科学研究院 | E-band-based wireless communication system and signal processing method thereof |
| WO2021232888A1 (en) * | 2020-05-21 | 2021-11-25 | 江苏亨通太赫兹技术有限公司 | Multi-channel dfe digital communication system and 5g signal backhaul system |
| CN115865271A (en) * | 2022-11-23 | 2023-03-28 | 杭州翼邦芯科技有限公司 | E-band millimeter wave point-to-point transmission method and device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050170789A1 (en) * | 2004-02-04 | 2005-08-04 | Consolazio Stephen J. | E-Band radio transceiver architecture and chip set |
| CN101227358A (en) * | 2007-12-20 | 2008-07-23 | 北京北方烽火科技有限公司 | Dual processor WiMAX base station and data processing method thereof |
| CN101789791A (en) * | 2010-01-12 | 2010-07-28 | 陕西龙腾通讯科技有限责任公司 | Broadband radio intermediate-frequency analogue/digital mixed signal processor |
| CN103346866A (en) * | 2013-07-19 | 2013-10-09 | 武汉虹信通信技术有限责任公司 | Method of transmitting 1588v2 message in microwave system |
| CN103384940A (en) * | 2013-01-08 | 2013-11-06 | 华为技术有限公司 | Device for return transmission networking |
| CN103580714A (en) * | 2013-11-11 | 2014-02-12 | 爱斯泰克（上海）高频通讯技术有限公司 | Multi-chip integrated millimeter wave wireless-connected transmit-receive system |
| CN103647596A (en) * | 2013-12-31 | 2014-03-19 | 北京国电通网络技术有限公司技术服务中心 | Double-receiving and double-transmitting modulator-demodulator of satellite |
| CN203722623U (en) * | 2013-12-27 | 2014-07-16 | 中国科学院上海微系统与信息技术研究所 | E-waveband wireless transmission device |
-
2014
- 2014-08-13 CN CN201410398089.1A patent/CN104135294B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050170789A1 (en) * | 2004-02-04 | 2005-08-04 | Consolazio Stephen J. | E-Band radio transceiver architecture and chip set |
| CN101227358A (en) * | 2007-12-20 | 2008-07-23 | 北京北方烽火科技有限公司 | Dual processor WiMAX base station and data processing method thereof |
| CN101789791A (en) * | 2010-01-12 | 2010-07-28 | 陕西龙腾通讯科技有限责任公司 | Broadband radio intermediate-frequency analogue/digital mixed signal processor |
| CN103384940A (en) * | 2013-01-08 | 2013-11-06 | 华为技术有限公司 | Device for return transmission networking |
| CN103346866A (en) * | 2013-07-19 | 2013-10-09 | 武汉虹信通信技术有限责任公司 | Method of transmitting 1588v2 message in microwave system |
| CN103580714A (en) * | 2013-11-11 | 2014-02-12 | 爱斯泰克（上海）高频通讯技术有限公司 | Multi-chip integrated millimeter wave wireless-connected transmit-receive system |
| CN203722623U (en) * | 2013-12-27 | 2014-07-16 | 中国科学院上海微系统与信息技术研究所 | E-waveband wireless transmission device |
| CN103647596A (en) * | 2013-12-31 | 2014-03-19 | 北京国电通网络技术有限公司技术服务中心 | Double-receiving and double-transmitting modulator-demodulator of satellite |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471801A (en) * | 2015-12-02 | 2016-04-06 | 中国电子科技集团公司第四十一研究所 | 5G mobile communication digital modulating signal generation device and generation method thereof |
| CN105471801B (en) * | 2015-12-02 | 2018-11-20 | 中国电子科技集团公司第四十一研究所 | A kind of 5G mobile communication digital modulation signal occurrence device and its method for generation |
| CN107863987A (en) * | 2017-12-21 | 2018-03-30 | 中国电子科技集团公司第五十四研究所 | A kind of ultra wide band E band transceivers |
| CN107863987B (en) * | 2017-12-21 | 2020-03-17 | 中国电子科技集团公司第五十四研究所 | Ultra-wideband E-band transceiver |
| CN111641418A (en) * | 2020-05-07 | 2020-09-08 | 中国电子科技集团公司电子科学研究院 | E-band-based wireless communication system and signal processing method thereof |
| WO2021232888A1 (en) * | 2020-05-21 | 2021-11-25 | 江苏亨通太赫兹技术有限公司 | Multi-channel dfe digital communication system and 5g signal backhaul system |
| CN115865271A (en) * | 2022-11-23 | 2023-03-28 | 杭州翼邦芯科技有限公司 | E-band millimeter wave point-to-point transmission method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104135294B (en) | 2016-08-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10944607B2 (en) | Transmission apparatus and transmission method of an aggregate physical layer protocol data unit | |
| CN102118191B (en) | Method, equipment and system for transmitting common public radio interface data | |
| CN103580703B (en) | Transmission circuit, transceiver, communication system and data transmitting method | |
| CN101490966B (en) | Antenna array system | |
| US8989088B2 (en) | OFDM signal processing in a base transceiver system | |
| CN104135294B (en) | A kind of E Band wireless transmission signal generating apparatus | |
| CN104618086B (en) | A kind of single conductor cable data transmission system and method | |
| CN101136811A (en) | OFDM transmission signal processing equipment, method and radio frequency far-end unit | |
| CN104618058B (en) | The medium-rate variable modulator frame by frame encoded based on LDPC | |
| CN106576267A (en) | Digital fronthaul data transmission method, device and system | |
| CN203722632U (en) | Satellite communication terminal having multiple receiving channels | |
| CN107819490A (en) | A kind of pulse ultra-broad band Terahertz receives and dispatches framework | |
| WO2011140789A1 (en) | Method and device for transmitting common public radio interface signals via coaxial line | |
| CN104378129B (en) | A kind of ground-to-air wideband communication system for unmanned plane | |
| CN103812608B (en) | Method and system for compressing IQ data | |
| CN202190265U (en) | Hybrid frequency hopping wireless transmitting and receiving system | |
| KR20120071951A (en) | Apparatus and method for transmitting and receiving | |
| CN114450995A (en) | Wireless-wired physical convergence architecture | |
| CN105099537A (en) | Digital transmission sender used for satellite | |
| CN108512788B (en) | PCM module based on noise shaping for digital mobile forward link | |
| CN202309693U (en) | Short wave automatic control communication unit based on radio frequency digitization | |
| CN202261371U (en) | Mixed-mode radio-frequency zooming system | |
| CN111641573B (en) | Multichannel DFE digital communication system and 5G signal return system | |
| CN103138776A (en) | Multiple output Zigbee launcher | |
| CN108282165A (en) | A kind of wireless communication system architecture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |