Distributed MIMO public mobile communication system
A mobile communication system, multi-input multi-output technology, applied in the field of mobile communication systems, can solve the problems of system performance, such as the influence of communication link independence between transceiver antennas, large access distance from base station to user, and weakened communication link independence. , to achieve the effect of improving cell coverage, reducing radiation, and weakening spatial correlation
Inactive Publication Date: 2006-12-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
[0007] 1. System performance is affected by the independence of the communication link between the transmitting and receiving antennas
Since the antennas are concentrated in the base station, the spatial correlation of the base station antennas is strong, and the independence of the communication link between the transmitting and receiving antennas is weakened, resulting in poor system performance
[0008] 2. The access distance from the base station to the user is relatively large, and the requirements for the transmission power of the base station and mobile station are high, resulting in a greater impact of electromagnetic waves on the human body
[0009] 3. In order to achieve cell coverage, the base station needs to be built on a taller building, and the flexibility of base station location is limited
[0010] Distributed MIMO technology can overcome the problem of strong link spatial correlation in centralized MIMO, but the papers, patents and related publications that have been reported so far are still limited to the theoretical research on the performance indicators of distributed MIMO technology. A Practical Scheme of Distributed MIMO Mobile Communication System
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[0042] Specific implementation of the uplink of the present invention: In the uplink, the signal is transmitted from the mobile station 2 through multiple mobile station antennas 2, and after wireless propagation, it is received by a total of seven base station antennas 3 located on different street lamps 11. The received signal is transmitted to the central signal processor 7 through the cable duct 10 of the street lamp through the optical fiber 8 for joint detection. The central signal processor 7 can be connected to the core network 6 through the access server 5 .
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The disclosed distributed MIMO public mobile communication system comprises: spanning antenna on street lamp to connect antenna to a central signal processor through current lamp cable, and accessing server to connect with a core network. This invention makes full use of current lamp system, reduces antenna space correlation, and improves system performance and capacity with low cost.
Description
technical field [0001] The invention belongs to the technical field of communication, in particular to a mobile communication system using multiple antennas in the communication technology. Background technique [0002] As we all know, the centralized Multiple Input Multiple Output (MIMO) mobile communication system refers to a communication system in which both the base station and the mobile station have multiple antennas. It has good spectral efficiency, high system capacity and relatively low Good communication quality. There are two main types of space-time codes used in centralized MIMO mobile communication systems: layered space-time codes (Layered Space Time Codes, LSTC) based on non-transmit diversity; space-time trellis codes (Space Time Trellis Codes) based on transmit diversity. , STTC) and Space Time Block Codes (Space Time Block Codes, STBC). [0003] The layered space-time code divides the source data into several parallel sub-data streams, and encodes and m...
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Inventor 孔婷唐友喜
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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