CN108540224A - One mode group is multiplexed the optical fiber forward pass system blended with radio MIMO - Google Patents

Abstract

The present invention proposes the optical fiber forward pass system that the multiplexing of one mode group is blended with radio MIMO；The system can provide the quad capacity of single mode optical fiber Transmission system；Or the Front haul transmission pressure on capacity or rate is reduced to a quarter of single mode optical fiber Transmission system；System poor, four modal sets less fundamental mode optical fibre of large effective area using big effective refractive index, effectively reduces nonlinear effect and pattern crosstalk；New approaches and guarantee are provided for mobile communication Front haul long spans transmission under special applications scene.

Description

One mode group is multiplexed the optical fiber forward pass system blended with radio MIMO

Technical field

The present invention relates to the optical fiber forward pass systems that the multiplexing of one mode group is blended with radio MIMO, and it is logical to can be applied to optical fiber The fields such as letter, optical-fiber wireless access, optical Information Processing and generation information technology.

Background technology

As data communication is continuously increased with multimedia service demand, mobile communication rapid development simultaneously constantly meets people Communication requirement；However, the front end delivery interface that existing mobile communications network uses is deposited in terms of data rate, bandwidth, time delay In significant limitation；For such case, the units such as China Mobile Communications Research Institute propose next-generation forward pass interface NGFI (Next Generation Front-haul Interface) [1 China mobile research institute, et Al. White Paper of Next Generation Fronthaul Interface, v1.0 (2015)] to meet The demand of five third-generation mobile communications (5G) development；NGFI refers to that Base-Band Processing function is penetrated with distal end in next generation wireless network main equipment Front-haul forward pass interfaces between frequency processing function, provide five kinds of interface splitting schemes, analogue transmission both may be used, Digital transmission technology can be used again to reduce to system parameter requirement, can flexibly accept or reject, be mobile communication Front-haul forward pass The further research of network provides important references.In recent years, wireless cloud center (RCC, the radio cloud in NGFI Center) high-speed of the optical fiber forward pass between far end radio frequency system (RRS, radio remote system), high power capacity, Long span demand increasingly increases severely.Meanwhile with wireless multiple-input, multiple-output (MIMO) technology answering in 4G, 5G and future wireless system With being further exacerbated by optical fiber forward pass transmission pressure [2 X. Liu, H. Zeng, N. Chand, and F. Effenberger, "Bandwidth-Efficient Mobile Fronthaul Transmission for Future 5G Wireless Networks," in Asia Communications and Photonics Conference 2015, C. Lu, J. Luo, Y. Ji, K. Kitayama, H. Tam, K. Xu, P. Ghiggino, and N. Wada, eds., OSA Technical Digest (Optical Society of America, 2015), paper ASu3E.4]；Certainly, conventional radio MIMO technical research outputs and inputs number [3 Chi-Hsiang also in less at present Lin, Chun-Ting Lin, Hou-Tzu Huang, Wei-Siang Zeng, Shou-Chih Chiang, and Hsi- Yu Chang, "60-GHz optical/wireless MIMO system integrated with optical subcarrier multiplexing and 2x2 wireless communication," Opt. Express 23, 12111-12116 (2015)]；The research of extensive mimo antenna also also in strategic concept and preliminarily theoretical simulation stage, Really it is still necessary to want long period [4 E. Larsson, O. Edfors, F. Tufvesson, T. for deployment and realization Marzetta, “Massive MIMO for next generation wireless systems,” IEEE Communications Magazine, 52(2): 186-195 (2014)；5 L. Lu, G. Y. Li, A. L. Swindlehurst, A. Ashikhmin, R. Zhang, “An Overview of Massive MIMO: Benefits and Challenges,” IEEE Journal of Selected Topics in Signal Processing, 8(5): 742-758 (2014)； 6 J. Shen, S. Suyama, T. Obara, Y. Okumura, “Requirements of power amplifier on super high bit rate massive MIMO OFDM transmission using higher frequency bands,” Globecom Workshops (GC Wkshps), 2014: 433-437].In this way, Current urgent communication requirement and MIMO technology bring Front-haul optical fiber and transmit the immense pressure on capacity and rate, Although can exponentially reduce transmission rate by filtering and compressing, still Front-haul optical transport networks are caused greatly Pressure, to the following Front-haul transmission be a huge challenge [1； 7 Yiran Ma, Zhiguang Xu, Chengliang Zhang, Huafeng Lin, Qing Wang, Min Zhou, Heng Wang, Jingwen Yu, and Xiaomu Wang, "Demonstration of digital fronthaul over self-seeded WDM-PON in commercial LTE environment," Opt. Express 23, 11927-11935 (2015)； 8 Y. Ma, Z. Xu, H. Lin, M. Zhou, H. Wang, C. Zhang, J. Yu, and X. Wang, "Demonstration of CPRI over Self-seeded WDM-PON in Commercial LTE Environment," in Optical Fiber Communication Conference, OSA Technical Digest (Optical Society of America, 2015), paper M2J.6； 9 M. Zhu, X. Liu, N. Chand, F. Effenberger, and G. Chang, "High-Capacity Mobile Fronthaul Supporting LTE-Advanced Carrier Aggregation and 8×8 MIMO," in Optical Fiber Communication Conference, OSA Technical Digest (Optical Society of America, 2015), paper M2J.3 ]。

Meanwhile mode multiplexing（MDM）Technology is by less fundamental mode optical fibre（FMF）In each spatial model regard parallel transmission as Subchannel is exactly a natural multiple-input and multiple-output in the MDM system natures based on FMF（MIMO）System；Based on FMF's MDM technologies have become the forward position research hotspot of optical communication field, are field ultrahigh speed, vast capacity, extra long distance, the Gao Pu Effect transmits most potential one of realization method, have extremely wide application prospects and development space [10 He Wen, Hongjun Zheng, Qi Mo, et al. Few-Mode Fibre-Optic Microwave Photonic Links, Light: Science & Applications, 2017.8, 6, e17021,1-8；11 Bin Huang, Nicolas K. Fontaine, Roland Ryf, Binbin Guan, Sergio G. Leon-Saval, R. Shubochkin, Y. Sun, R. Lingle, and Guifang Li, "All-fiber mode-group-selective photonic lantern using graded-index multimode fibers," Opt. Express 23, 224-234 (2015)].Under normal conditions, intercoupling between degenerate mode in less fundamental mode optical fibre, slightly strong, pattern crosstalk is slightly larger, receiving terminal degenerate mode Formula data processing difficulty is slightly larger.

Invention content

In view of the above-mentioned problems, in state natural sciences fund (number 61671227 and 61431009）, nature section of Shandong Province NSF National Science Foundation（ZR2011FM015）, " Mount Taishan scholar " construction project specific project expenditure support under, the present invention proposes one mode group The optical fiber forward pass system that multiplexing is blended with radio MIMO；Modal sets multiplexing method of the present invention is the degenerate mode in same modal sets Formula transmits signal only with one of pattern, different degenerate mode transmission during another pattern is spare or same modal sets Identical signal；In this way, between the corresponding pattern of different transmission signal effective refractive index difference reform into it is effective between larger modal sets Refringence, pattern crosstalk effectively reduce；Transmission system proposed by the invention often increases one mode group signal, optical fiber forward pass Transmission capacity is doubled than single-mode system；It is capable of providing more multiplication capacity of multiple identical as modal sets number；Effectively solution Certainly optical fiber forward pass is in facing challenges such as capacity, rate, spectrum efficiency, lower deployment cost demands, to be moved under special applications scene The transmission of telecommunication optical fiber forward pass long span provides new approaches and guarantee.

Technical solution is used by present patent application solves its technical problem：

For the active demand of mobile telecommunication optical fiber forward pass capacity under special applications scene, it is multiple that the present invention proposes one mode group With the optical fiber forward pass system blended with radio MIMO；The system includes that wireless cloud center RRC, fiber transmission link and radio frequency are drawn Remote system RRS；Wherein, wireless cloud center RRC specifically includes RRC Base-Band Processings end and the ports NGFI, Polarization Controller and pattern The alternative photon lantern of group；Fiber transmission link is four modal sets less fundamental mode optical fibre transmission links；Radio frequency stretch system RRS includes Modal sets alternative photon lantern, four enter four and go out photodetection and data and radio frequency processing module, antenna transmitting module；RRC Base-Band Processing end is connected to four single mode ends of four modal sets alternative photon lanterns, light with the ports NGFI through Polarization Controller Sub- lantern taper lacks mould end and is fused to that one big effective refractive index is poor, four modal sets less fundamental mode optical fibre transmission link of large effective area； Less fundamental mode optical fibre transmission link（7）The taper that output end is connected to four modal sets alternative photon lanterns lacks mould end, photon lantern Four single mode ends be connected respectively to four and enter four four input terminals for going out photodetection and data and radio frequency processing module；Four enter four Four output ends for going out photodetection and data and radio frequency processing module are connected to four n × n radio MIMO antenna transmitting modules； RRC Base-Band Processings end exports four phase co-wavelengths with the ports NGFI and is either passed through respectively partially close to the signal of wavelength or different wave length Controller single mode transport of shaking to modal sets alternative photon lantern four input terminals, in photon lantern output end implementation pattern Conversion and multiplexing, are multiplexed into four modal sets signal all the way；The four modal sets signal is poor by one big effective refractive index, big effectively Four modal sets less fundamental mode optical fibre of area transmits；And then enter in radio frequency stretch system RRS；By modal sets alternative photon lamp Cage converts four modal sets signal modes and is demultiplexing as four road single mode signals, and each modal sets signal, which corresponds to single mode all the way, to be believed Number；Later, demultiplexing tetra- road single mode signals of Hou enter four through four and go out photodetection and data and after radio frequency processing module processing points Four n × n radio MIMO antenna transmitting modules are not output to be emitted；Each n × n radio MIMO antenna transmitting modules（n= 1,1024）, correspond to 1 wired input end and n transmitting antenna；Each n × n radio MIMO antenna transmitting modules tool There are independent transmission function and joint emission function；Four n × n radio MIMO antenna transmitting modules can structure using joint emission function Integral 4n × 4n radio MIMOs antenna emitting portion；If n=1, antenna can be integrally formed the emission part of 4 × 4 radio MIMO antennas Point；If n=8, antenna can be integrally formed the emitting portion of 32 × 32 radio MIMO antennas.

The advantageous effect of present patent application is：

1. system proposed by the invention often increases one mode group signal, optical fiber forward pass transmission capacity is transmitted than single mode optical fiber System doubles, and can be increased to four times of transmission capacities；If keeping each modal sets signal and single mode optical fiber Transmission system The diversity gain of radio MIMO antenna or spatial multiplexing gain or both EQ Gain can be increased to four by equivalent data rates capacity Times；Under identical antenna channel capacity situation, the optical fiber forward pass transmission of system proposed by the invention on capacity or rate Pressure is reduced to a quarter of single mode optical fiber Transmission system；

2. system using big effective refractive index is poor, four modal sets less fundamental mode optical fibre of large effective area, effectively reduce nonlinear effect with Pattern crosstalk；

3. correspondence system is transmitted using the close either phase co-wavelength of wavelength or different wave length, to the laser in system Device, photoelectric detection module performance are not strict with, and system complexity and cost can be effectively reduced；

It is special applications field 4. Transmission system transmission capacity proposed by the present invention is big, rate and the availability of frequency spectrum are high, at low cost Mobile telecommunication optical fiber forward pass provides new approaches and guarantee under scape.

Description of the drawings

Fig. 1 is the optical fiber forward pass system schematic that one mode group multiplexing of the present invention is blended with radio MIMO.The system It is divided into 3 function modules：1 is wireless cloud center RRC, and 2 be fiber transmission link, and 3 be radio frequency stretch system RRS；Wherein, wirelessly Cloud center RRC includes RRC Base-Band Processings end and the ports NGFI（1）, four Polarization Controllers（2）（3）（4）（5）It can with modal sets Selective photon lantern（6）；Fiber transmission link is four modal sets less fundamental mode optical fibre transmission links（7）；Radio frequency stretch system RRS packets Include modal sets alternative photon lantern（8）, four enter four and go out photodetection and data and radio frequency processing module（9）, four n × n Radio MIMO antenna transmitting module（10）（11）（12）（13）；RRC Base-Band Processings end and the ports NGFI（1）Through Polarization Controller （2）（3）（4）（5）It is connected to four modal sets alternative photon lanterns（6）Four single mode ends, photon lantern（6）Taper lacks mould End is fused to that one big effective refractive index is poor, four modal sets less fundamental mode optical fibre transmission link of large effective area（7）；Less fundamental mode optical fibre transmits Link（7）Output end is connected to four modal sets alternative photon lanterns（8）Taper lack mould end, photon lantern（8）Four Single mode end, which is connected respectively to four and enters four, goes out photodetection and data and radio frequency processing module（9）Four input terminals；Four, which enter four, goes out Photodetection and data and radio frequency processing module（9）Four output ends be connected to four n × n radio MIMO antenna transmitting modules （10）（11）（12）（13）；Each n × n radio MIMO antenna transmitting modules（N=1,1024）, corresponding 1 wired defeated Enter end and n transmitting antenna；Each n × n radio MIMO antenna transmitting modules have the function of independent transmission and joint emission function； Four n × n radio MIMO antenna transmitting modules may make up whole 4n × 4n radio MIMOs antenna transmitting using joint emission function Part；If n=1, antenna can be integrally formed the emitting portion of 4 × 4 radio MIMO antennas；If n=8, antenna can be integrally formed 32 × The emitting portion of 32 radio MIMO antennas；

Fig. 2 modal sets alternative photon lantern schematic diagrames（a）With output mode figure（b）；Figure（a）In, centre is one section of few mould Optical fiber, the right and left are photon lantern respectively；The taper of photon lantern lacks the intermediate less fundamental mode optical fibre of mould end connection；The leftmost side in figure It is photon lantern single mode end with the rightmost side；Photon lantern pattern LP01 corresponds to the optical fiber that input terminal is 22 μm of core diameter, LP11a and LP11b corresponds to the optical fiber that input terminal is 20 μm of core diameter, and it is fibre core that LP21a, LP21b and LP02, which correspond to input terminal, The optical fiber that 15 μm of diameter；Figure（b）Middle output mode figure from left to right distinguish associative mode LP01, LP11a, LP11b, LP21a, LP21b and LP02 [11]；

Fig. 3 is less fundamental mode optical fibre cross-sectional view（a）With the impulse response figure of different mode signal（b）[10]；The less fundamental mode optical fibre is big Effective refractive index is poor, six pattern less fundamental mode optical fibre of large effective area；Sort out processing method according to above-mentioned photon lantern modal sets, this six The pattern transmission signal of pattern less fundamental mode optical fibre is first mode group LP01, second mode group LP11a and LP11b, third mould respectively Formula group LP21a and LP21b, fourth mode group LP02.In the present invention, which is known as four modal sets and lacks mould light It is fine；It is LP01, LP11a respectively that this four modal sets, which transmits signal,（Or LP11b）、LP21a（Or LP21b）With LP02 signals；It is different The response of modal sets signal pulse can obtain pattern crosstalk very little；Its multichannel nonlinear crosstalk also very little；

Wherein, the photon lantern in present patent application Fig. 2, Fig. 3 and less fundamental mode optical fibre are using our seminar's correlative theses [10,11] The middle photon lantern and less fundamental mode optical fibre used.

Specific implementation mode

With reference to the embodiment and attached drawing technical solution that the present invention will be described in detail, but protection domain is without being limited thereto.

1 Fig. 1 of embodiment is the optical fiber forward pass system schematic that one mode group multiplexing of the present invention is blended with radio MIMO. The system is divided into 3 function modules：1 is wireless cloud center RRC, and 2 be fiber transmission link, and 3 be radio frequency stretch system RRS；Its In, wireless cloud center RRC includes RRC Base-Band Processings end and the ports NGFI（1）, four Polarization Controllers（2）（3）（4）（5）And mould Formula group alternative photon lantern（6）；Fiber transmission link is four modal sets less fundamental mode optical fibre transmission links（7）；Remote radio system The RRS that unites includes modal sets alternative photon lantern（8）, four enter four and go out photodetection and data and radio frequency processing module（9）, four A n × n radio MIMOs antenna transmitting module（10）（11）（12）（13）；RRC Base-Band Processings end and the ports NGFI（1）It is controlled through polarization Device processed（2）（3）（4）（5）It is connected to four modal sets alternative photon lanterns（6）Four single mode ends, photon lantern（6）Taper Few mould end is fused to that one big effective refractive index is poor, four modal sets less fundamental mode optical fibre transmission link of large effective area（7）；Less fundamental mode optical fibre Transmission link（7）Output end is connected to four modal sets alternative photon lanterns（8）Taper lack mould end, photon lantern（8）'s Four single mode ends, which are connected respectively to four and enter four, goes out photodetection and data and radio frequency processing module（9）Four input terminals；Four enter Four go out photodetection and data and radio frequency processing module（9）Four output ends be connected to the transmitting of four n × n radio MIMO antennas Module（10）（11）（12）（13）；RRC Base-Band Processings end and the ports NGFI（1）Export four phase co-wavelengths or close to wavelength or The signal of person's different wave length is respectively through Polarization Controller（2）（3）（4）（5）Single mode transport is to modal sets alternative photon lantern （6）Four modal sets single mode ends, in photon lantern（6）Few mould end implementation pattern conversion and multiplexing, are multiplexed into four pattern all the way Group signal；It is LP01, LP11a respectively that this four modal sets, which transmits signal,（Or LP11b）、LP21a（Or LP21b）With LP02 signals； The four modal sets signal poor, four modal sets less fundamental mode optical fibre transmission link of large effective area by one big effective refractive index（7）It passes It is defeated；And then enter in radio frequency stretch system RRS；By modal sets alternative photon lantern（8）Four modal sets signal modes Four road single mode signals are converted and are demultiplexing as, each modal sets signal corresponds to single mode signal all the way；Later, tetra- tunnels demultiplexing Hou Single mode signal enters four through four and goes out photodetection and data and radio frequency processing module（9）It is wireless that four n × n are respectively outputted to after processing Mimo antenna transmitting module（10）（11）（12）（13）Emitted；Each n × n radio MIMO antenna transmitting modules（N=1,2, 3,1024）, correspond to 1 wired input end and n transmitting antenna；Each n × n radio MIMO antenna transmitting modules have Independent transmission function and joint emission function；Four n × n radio MIMO antenna transmitting modules may make up using joint emission function Whole 4n × 4n radio MIMOs antenna emitting portion；If n=1, antenna can be integrally formed the emission part of 4 × 4 radio MIMO antennas Point；If n=8, antenna can be integrally formed the emitting portion of 32 × 32 radio MIMO antennas.

Fig. 2 modal sets alternative photon lantern schematic diagrames（a）With output mode figure（b）；Figure（a）In, centre is one section Less fundamental mode optical fibre, the right and left are photon lantern respectively；The taper of photon lantern lacks the intermediate less fundamental mode optical fibre of mould end connection；In figure most Left side and the rightmost side are photon lantern single mode ends；Photon lantern pattern LP01 corresponds to the optical fiber that input terminal is 22 μm of core diameter, LP11a and LP11b corresponds to the optical fiber that input terminal is 20 μm of core diameter, and it is fibre core that LP21a, LP21b and LP02, which correspond to input terminal, The optical fiber that 15 μm of diameter；Figure（b）Middle output mode figure from left to right distinguish associative mode LP01, LP11a, LP11b, LP21a, LP21b and LP02 [11].Routine is in application, six single mode optical fibers are fused to six of modal sets alternative photon lantern respectively Single mode end, photon lantern lack mould end and are fused to a less fundamental mode optical fibre；In this way, six single modes of input can be believed by photon lantern Conversion is multiplexed into less fundamental mode optical fibre number respectively, forms modal sets all the way and transmits signal；These modal sets transmit signal in document [11] It is first mode group LP01, second mode group LP11a and LP11b, the third mode group LP21a, LP21b and LP02 respectively.Document [10] studies have shown that although refringence is smaller between pattern LP21 and LP02, not degeneracy；And less fundamental mode optical fibre transmits perturbation situation Under；It is not coupled between pattern LP21 and LP02.

In this way, the present invention apply in, we by the output mode group of the photon lantern be classified as first mode group LP01, Second mode group LP11a and LP11b, the third mode group LP21a and LP21b, fourth mode group LP02；The photon lantern is in this hair Then it is known as modal sets alternative photon lantern in bright；Degenerate mode in same modal sets is transmitted only with one of pattern Signal, different degenerate modes transmits identical signal during another pattern is spare or same modal sets.Four single mode optical fibers point It is not fused to four modal sets single mode ends of photon lantern, photon lantern lacks mould end and is fused to a four modal sets less fundamental mode optical fibres； Four single mode signals of input can be converted respectively by photon lantern and be multiplexed into less fundamental mode optical fibre, formed four modal sets all the way and transmit Signal；It is LP01, LP11a respectively that this four modal sets, which transmits signal,（Or LP11b）、LP21a（Or LP21b）With LP02 signals；If Signal negative direction transmits, and can four modal sets all the way of input be transmitted to signal conversion by photon lantern is demultiplexed into four single modes Optical fiber forms four single mode transport signals.Photon lantern（6）It converts and is multiplexed as modal sets, photon lantern（8）Use operation mode Group conversion and demultiplexing.Also pattern alternative photon lantern in document [10] can be sorted out processing application according to above-mentioned modal sets In the present invention.

Fig. 3 is less fundamental mode optical fibre cross-sectional view（a）With the impulse response figure of different mode signal（b）[10]；The less fundamental mode optical fibre It is that big effective refractive index is poor, six pattern less fundamental mode optical fibre of large effective area；Sort out processing method according to above-mentioned photon lantern modal sets, The pattern transmission signal of the six patterns less fundamental mode optical fibre is first mode group LP01, second mode group LP11a and LP11b, the respectively Mode set LP21a and LP21b, fourth mode group LP02；In the present invention, which it is few to be known as four modal sets Mode fiber；It is LP01, LP11a respectively that this four modal sets, which transmits signal,（Or LP11b）、LP21a（Or LP21b）With LP02 signals. Effective refractive index difference reaches 10 between the less fundamental mode optical fibre modal sets^-3Magnitude, effective area are 1.6 times of standard single-mode fiber, 1550 wave band minimal attenuation coefficients are the 0.227dB/km of LP01 patterns, and maximum attenuation coefficient is the 0.262dB/ of LP02 patterns km；The response of different mode group signal pulse can obtain pattern crosstalk very little；Its multichannel nonlinear crosstalk also very little [10].

In short, the present invention proposes the optical fiber forward pass system that the multiplexing of one mode group is blended with radio MIMO；System is adopted It is transmitted with the close either phase co-wavelength of wavelength or different wave length, to the laser in system, photoelectric detection module Can there is no strict requirements, system complexity and cost can be substantially reduced；System poor, large effective area using big effective refractive index Four modal sets less fundamental mode optical fibres, effectively reduce nonlinear effect and pattern crosstalk；Signal polarization is adjusted using Polarization Controller simultaneously State is to further decrease pattern crosstalk；Using photon lantern implementation pattern group conversion multiplexing and modal sets conversion demultiplexing, effectively Reduce loss, improve system power budget, extends transmission distance and increase accessing user's quantity；System proposed by the invention Often increase one mode group signal, optical fiber forward pass transmission capacity is doubled than single mode optical fiber Transmission system, can be increased to Four times of transmission capacities；It, can be wireless if keeping each modal sets signal and single mode optical fiber Transmission system equivalent data rates capacity The diversity gain or spatial multiplexing gain of mimo antenna or both EQ Gain are increased to four times；In identical antenna channel capacity situation Under, the forward pass transmission pressure of system proposed by the invention on capacity or rate is reduced to four points of single mode optical fiber Transmission system One of；The availability of frequency spectrum improves；Cost-effective reduction；System proposed by the present invention is mobile telecommunication optical fiber under special applications scene Forward pass provides new approaches and guarantee.

It should be pointed out that specific implementation mode is the more representational example of the present invention, it is clear that skill of the invention Art scheme is not limited to the above embodiments, and can also have many variations.Those skilled in the art define public affairs with the present invention Written description open or according to file is undoubted to be obtained, and this patent scope of the claimed is considered as.

Claims (1)

1. one mode group is multiplexed the optical fiber forward pass system blended with radio MIMO；It is characterized in that：The system is divided into wirelessly Cloud center RRC, fiber transmission link and radio frequency stretch system RRS totally three function modules；Wireless cloud center RRC includes RRC bases Tape handling end and the ports NGFI（1）, four Polarization Controllers（2）（3）（4）（5）With four modal sets alternative photon lanterns （6）；Fiber transmission link is four modal sets less fundamental mode optical fibre transmission links（7）；Radio frequency stretch system RRS includes that four modal sets are optional Selecting property photon lantern（8）, four enter four and go out photodetection and data and radio frequency processing module（9）, four n × n radio MIMO antennas Transmitting module（10）（11）（12）（13）；RRC Base-Band Processings end and the ports NGFI（1）Through Polarization Controller（2）（3）（4）（5）Even It is connected to four modal sets alternative photon lanterns（6）Four single mode ends, photon lantern（6）Taper lacks mould end and is fused to one greatly Effective refractive index is poor, four modal sets less fundamental mode optical fibre transmission link of large effective area（7）；Less fundamental mode optical fibre transmission link（7）Output end It is connected to four modal sets alternative photon lanterns（8）Taper lack mould end, photon lantern（8）Four single mode ends be separately connected Enter four to four and goes out photodetection and data and radio frequency processing module（9）Four input terminals；Four, which enter four, goes out photodetection and data With radio frequency processing module（9）Four output ends be connected to four n × n radio MIMO antenna transmitting modules（10）（11）（12） （13）；RRC Base-Band Processings end and the ports NGFI（1）Four phase co-wavelengths are exported either close to wavelength or the signal of different wave length Respectively through Polarization Controller（2）（3）（4）（5）Single mode transport is to modal sets alternative photon lantern（6）Four modal sets lists Mould end, in photon lantern（6）Few mould end implementation pattern group conversion and multiplexing, are multiplexed into four modal sets signal all the way；Four pattern Group signal poor, four modal sets less fundamental mode optical fibre transmission link of large effective area by one big effective refractive index（7）Transmission；Later, It enters back into radio frequency stretch system RRS；By four modal sets alternative photon lanterns（8）Four modal sets signal mode groups are converted Be demultiplexing as four road single mode signals, each modal sets signal corresponds to single mode signal all the way；Later, tetra- road single modes of Hou are demultiplexed Signal enters four through four and goes out photodetection and data and radio frequency processing module（9）Four n × n radio MIMOs are respectively outputted to after processing Antenna transmitting module（10）（11）（12）（13）Emitted；Each n × n radio MIMO antenna transmitting modules（N=1,2, 3,1024）, correspond to 1 wired input end and n transmitting antenna；Each n × n radio MIMO antenna transmitting modules tool There are independent transmission function and joint emission function；Four n × n radio MIMO antenna transmitting modules can structure using joint emission function Integral 4n × 4n radio MIMOs antenna emitting portion；If n=1, antenna can be integrally formed the emission part of 4 × 4 radio MIMO antennas Point；If n=8, antenna can be integrally formed the emitting portion of 32 × 32 radio MIMO antennas.