Method for improving channel capacity of indoor distributed multi-input and multi-output system

A channel capacity, multi-input technology, applied in diversity/multi-antenna systems, wireless communication, space transmit diversity, etc., can solve problems such as increased system burden, poor accuracy, and large amount of information feedback

Active Publication Date: 2012-09-12
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is not accurate, and requires a large amount of information feedback, which increases the burden on the system

Method used

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  • Method for improving channel capacity of indoor distributed multi-input and multi-output system
  • Method for improving channel capacity of indoor distributed multi-input and multi-output system
  • Method for improving channel capacity of indoor distributed multi-input and multi-output system

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Embodiment Construction

[0045] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0046] see figure 1 , the embodiment of the present invention takes an indoor 2×2 distributed MIMO antenna system as an example, and the implementation steps are as follows: 1) The receiver collects the angle domain information according to the channel state information, including the incident angle of the signal arriving at the receiving antenna Normalized receiving antenna distance Δ r That is, the ratio of the antenna spacing to the carrier wavelength, the carrier wavelength λ c , Antenna spacing Δ r lambda c , the distance d between the receiving antenna and the transmitting antenna, and the line-of-sight path attenuation factor α are fed back to the transmitting end. The baseband processing unit (BBU) reconstructs the channel information matrix, establishes the angle-domain model of the MIMO channel, clarifies the fading situation of the chan...

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Abstract

The invention discloses a method for improving the channel capacity of an indoor distributed multi-input and multi-output system, relates to the wireless communication field, and provides a method which can obtain the best performance of system capacity and improve the channel capacity of the indoor distributed multi-input and multi-output system. A transmitting end builds an angular domain module of the distributed multi-input and multi-output system based on angular domain information fed back by a receiving end; channel information matrix is reconstructed aimed at different indoor environments based on the built angular domain module of the distributed multi-input and multi-output system; transmitting antennas with large channel gains and larger arrival angle differences in indoor distributed antennas are selected to send data based on the channel information matrix; channel information matrix selected by the antennas is decomposed through a singular value decomposition method, and the selected transmitting antennas are subjected to power distribution through a power water filling algorithm; and signals to be sent of each user in each channel are sent by using the indoor distributed multi-input and multi-output system, so that the channel capacity is improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method for improving channel capacity of an indoor distributed MIMO system. Background technique [0002] With the rapid growth of indoor data traffic, indoor coverage has become the focus of major manufacturers and operators. Relevant data show that 3G indoor business volume accounts for nearly 70% of its total business volume worldwide, and indoor users are more than twice that of outdoor users. It can be said that ensuring good indoor coverage of the network is the key to improving service levels, developing customers, and increasing operating income. However, for the 3G or LTE network using the 2GHz high-frequency band, due to the shielding and absorption of the building itself, the transmission attenuation of radio waves is relatively large, and the diffraction capability of 2GHz high-frequency radio waves is much smaller than the 900MHz of GSM, which is easy to For...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04W16/20
Inventor 赵毅峰杜亮黄联芬陈春超张远见
Owner XIAMEN UNIV
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