Downlink multi-user method combined with receiving antenna selection and close-to zero beam forming

A receiving antenna and beamforming technology, which is applied in the field of downlink multi-user multiplexing, can solve the problems of complexity increase, throughput limitation, difficulty in obtaining multi-user diversity, etc., and achieve the effect of reducing complexity and implementation cost

Inactive Publication Date: 2007-10-03
UNIV OF SCI & TECH OF CHINA
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[0003] "International Institute of Electronics and Electrical Engineers International Communication Conference Proceedings" (IEEE Internet.Conf.Communication ICC'05, Rio de Janeiro, Brazil, July 9-18, 2005, pp.542-546) introduces an Multi-antenna, single-antenna single-cell multi-antenna downlink channel based on zero-forcing beamforming technology downlink multi-user multiplexing method, this method uses quasi-orthogonal user channel selection method to select users, when the number of users in the system is small When , it is not easy to obtain multi-user diversity, so that the throughput that can be achieved is greatly limited
[0004] "IEEE JSAC Special Iss...

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  • Downlink multi-user method combined with receiving antenna selection and close-to zero beam forming
  • Downlink multi-user method combined with receiving antenna selection and close-to zero beam forming
  • Downlink multi-user method combined with receiving antenna selection and close-to zero beam forming

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Embodiment 1

[0062] This embodiment is applied in a single-cell system including a base station and K users, the base station is equipped with 8 transmitting antennas, the user end is equipped with 4 receiving antennas, the user end uses 1, 2 or 3 sets of radio frequency devices, and the base station uses Taking a multi-antenna downlink channel where the selection method of activating the receiving antenna subset is the quasi-orthogonal user channel selection method as an example, the implementation of the downlink multi-user multiplexing method combined with receiving antenna selection and zero-forcing beamforming is described. For the convenience of description below, M represents the number of transmitting antennas of the base station, N represents the number of receiving antennas of the user end, and L represents the number of radio frequency devices of the user end, that is, in the present embodiment, M=8, N=4, L =1,2,3.

[0063] Fig. 1 has provided the realization system block diagra...

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Abstract

A downlink multi-user multiplexing method integrating with receiving antenna selection and zero-approach bean formation (ZABF) includes setting number of radio frequency component at user end to be less than number of receiving antenna, operating greedy selection algorithm on user channel matrix by user end, selecting line with matrix second-order norm (MSON) from said matrix, projecting the rest lines and selecting projection line with MSON, repeating selection steps till number of radio component selected by user is equal to number of antenna subset, activating channel state information of all users to receive selection of antenna subset and ZABF.

Description

Technical field: [0001] The invention belongs to the technical field of mobile communication single-cell multi-antenna downlink channel capacity, and in particular relates to a downlink multi-user multiplexing method in which a base station performs scheduling and preprocessing according to channel state information in a multi-antenna downlink channel. Background technique: [0002] Multi-user diversity is an effective method to improve the spectrum efficiency of a wireless system that has been extensively studied in the field of mobile communication single-cell multi-antenna downlink channel capacity technology. [0003] "International Institute of Electronics and Electrical Engineers International Communication Conference Proceedings" (IEEE Internet.Conf.Communication ICC'05, Rio de Janeiro, Brazil, July 9-18, 2005, pp.542-546) introduces an Multi-antenna, single-antenna single-cell multi-antenna downlink channel based on zero-forcing beamforming technology downlink multi-...

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Application Information

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IPC IPC(8): H04B7/04
Inventor 邱玲黄森华刘宇鹏
Owner UNIV OF SCI & TECH OF CHINA
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