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MIMO communication system and method thereof

A communication system and algorithm technology, applied in the field of MIMO communication systems, can solve problems such as multi-user scheduling and power imbalance, system performance reduction, and operating cost increase, and achieve robust path power imbalance, reduced demand, and improved average power. System capacity and the effect of

Active Publication Date: 2010-01-06
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In short, the above-mentioned existing technologies either have low system gain due to ICI, or need to transmit a large amount of data and channel information between base stations through the backbone network, resulting in an increase in operating costs, or are more complicated. User scheduling and power imbalance cause system performance degradation

Method used

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  • MIMO communication system and method thereof
  • MIMO communication system and method thereof

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Embodiment Construction

[0033] Communication systems and methods thereof according to various embodiments of the present invention are described below with reference to the accompanying drawings.

[0034] Figure 5 A schematic diagram of a CO-MIMO-IN communication system according to an embodiment of the present invention is shown. Such as Figure 5 As shown, in the CO-MIMO-IN communication system, each base station BS1 and BS2 provides services to a single or multiple mobile stations MS1 and MS2, and each mobile station MS1 ​​and MS2 is only served by a single base station BS1 or BS2. Since the base station does not need to provide services to users of adjacent base stations, the complexity of scheduling is greatly reduced, and the impact of path power imbalance is eliminated.

[0035] In the communication system according to the embodiment of the present invention, for example, each base station BS1 calculates a weighting matrix according to a predetermined standard based on the channel matrix fr...

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Abstract

The invention discloses an MIMO communication system and a method thereof. The system comprises a plurality of base stations and a plurality of mobile stations, wherein each base station provides service for one or more mobile stations, and one base station provides service to each mobile station; each mobile station comprises a channel estimation unit which is used for estimating a channel matrix from the base station which provides service to the mobile station and the adjacent base station to the mobile station, wherein the channel matrix is fed back to the base station providing service to the mobile station and the adjacent base station; and each base station comprises a weighting matrix calculating unit and a weighting unit, wherein the weighting matrix calculating unit is used for calculating a weighting matrix by using a multi-user pre-coding algorithm based on the channel matrix fed back from the mobile station; and the weighting unit is used for carrying out weighting calculation for data symbols to be transmitted by using the weighting matrix. The system and the method improve the frequency spectrum efficiency of the system, reduce the demand on backbone network bandwidth, eliminate the influence caused by path power imbalance, and improve the throughput rate of users at the cell edge.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a MIMO communication system and its method, which can eliminate interference between cells through multi-user precoding, and can reduce the demand for backbone network bandwidth for information exchange between base stations and eliminate path power The effects of imbalance. Background technique [0002] As the evolution standard of IEEE802.16e and 3GPP LTE to IMT-advanced system, IEEE802.16m and 3GPP LTE+ aim to achieve higher average user throughput, cell edge user throughput and sector throughput. Multi-user MIMO (MU-MIMO) is an important obstacle in the evolution process. As we all know, Space Division Multiple Access (SDMA) technology can be used to improve system capacity, in which a single base station (BS) transmits multiple data streams to multiple users on the same time-frequency resource through precoding technology, so that each user Free from interference ...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L25/03H04B7/04H04B1/707
Inventor 杨红卫蔡立羽
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD