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A multicarrier MIMO system and its communication method

A multi-carrier and sub-carrier technology, applied in multiplex communication, diversity/multi-antenna system, transmission system, etc., can solve problems such as mathematical difficulty, achieve low complexity and optimize the effect of joint probability density function

Inactive Publication Date: 2011-11-23
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In principle, this function has a certain room for optimization, but it is very difficult in mathematics to optimize a function with many variables purposefully;
[0019] 3. This scheme requires as many IFFT times as the number of transmitting antennas, and the complexity of the algorithm is o(n T ·Nc·LogNc), relatively high

Method used

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  • A multicarrier MIMO system and its communication method
  • A multicarrier MIMO system and its communication method
  • A multicarrier MIMO system and its communication method

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Embodiment Construction

[0043] The present invention will be described below in conjunction with the accompanying drawings.

[0044] Figure 4 It is a frame diagram of a multi-carrier MIMO communication system of the present invention, wherein the MIMO communication system includes a transmitting end 10 (base station) and multiple receiving ends 20 (users). Figure 5 for Figure 4 Flowchart of user scheduling for the MIMO communication system shown. Image 6 It is a schematic diagram of the frame structure adopted by the multi-carrier MIMO communication system of the present invention.

[0045] like Figure 4-6 As shown, the transmitting end 10 has a multi-carrier MIMO data processor 110, a multi-carrier MIMO scheduler 120, a duplexer group 130 and n T Root transmit antenna. Each receiving terminal 20 has a multi-carrier receiving signal processor 210, a feedback information processor 220, a duplexer group 230, and n R Root receiving antenna. Wherein, the number of receiving antennas of each r...

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Abstract

The provided multi-carrier MIMO communication system comprises: a sending end to send data frame included at least channel estimation signal and user data; and at least one receiving end to receive data frame and generate relative feedback signal and analyze data user. Wherein, the sending end generates scheduling information contained target user and code flow and appointed emission beam according to said feedback signal for adaptive user scheduling. This invention can provide maximal channel capacity, and reduces cost and algorithm complexity.

Description

technical field [0001] The present invention relates to a wireless communication technology using a multiple-input multiple-output antenna system, in particular to a multi-carrier MIMO communication system and a communication method thereof. Background technique [0002] Future wireless communication systems need to support very high-speed data services, such as video conferencing, video on demand, interactive video games, and so on. According to the requirements mentioned in the ITU-R M1645 document: high-speed wireless services (High Mobility) need to support a rate of up to 100 Mbps, and for low-speed (Low Mobility) or fixed wireless (Fixed Wireless) services, a rate of up to 1 Gbps is required. [0003] The rate of a channel in wireless communication is equal to the product of the spectral bandwidth of the channel and the spectral efficiency of the applied technology. In order to increase the rate, it needs to increase its spectral bandwidth or the spectral efficiency o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/04H04L5/00H04L5/14H04J99/00
Inventor 潘振岗陈岚
Owner NTT DOCOMO INC