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A space sub-channel rate and power control method and its control device

A power control and space sub-technology, which is applied in the directions of transmission control/equalization, power management, selection device, etc., can solve the difficulty in achieving a balance and improvement in implementation complexity, performance and achievability, and does not consider transmitter channel state information. Unreliable modulation order discreteness and other issues, to achieve the effect of a reasonable balance between achievability and performance, good robust performance, and reduced bandwidth requirements

Inactive Publication Date: 2008-08-13
LENOVO (BEIJING) CO LTD
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Problems solved by technology

[0006] The purpose of the present invention is to provide a rate and power control method and control device for each space sub-channel, which solves the problem that the unreliability of the channel state information of the transmitter and the discreteness of the modulation order are not considered in the prior art. Technical issues that are difficult to strike a balance and improve in terms of realizability

Method used

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  • A space sub-channel rate and power control method and its control device
  • A space sub-channel rate and power control method and its control device
  • A space sub-channel rate and power control method and its control device

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Embodiment Construction

[0038] Generally speaking, the receiver can obtain nearly perfect channel state information, and the measured or estimated SINR / SNR (SINR: Signal-to-Interference-to-Noise Ratio, SNR: Signal-to-Noise Ratio) is also quite accurate. Larger information errors, especially in rapidly changing wireless environments, can lead to performance degradation in AMC or transmit precoding systems. Therefore, the present invention uses accurate channel state information on the receiver side to select a modulation and coding method for each spatial sub-channel, which can accurately reflect rapid wireless channel changes and obtain better robust performance. Most importantly, the reception The transmitter does not need to feed back channel state information to the transmitter in real time, which reduces the bandwidth requirement of the feedback channel.

[0039] figure 1 It is a flow chart of the steps of the method of the present invention, as shown in the figure, the present invention include...

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Abstract

The invention discloses a control method and a device of every space subchannel rate and power, the method comprises: receiver determinates modulation coding chose by every space subchannel according to the receiver side channel state information; the modulation coding which is chosen by the receiver is noticed to transmitter with index; pre-coding is carried out by the receiver According to channel state information statistics and the subchannel modulation coding. The invention returns only the 'index', not the channel state information real-time, thus reducing bandwidth demand of feedback channel. The invention pre-cods using channel state information statistical information, such as mean, variance matrix or related matrix parameters, thus reducing sensitivity pre-coding system performance to channel state information error.

Description

technical field [0001] The invention relates to multi-antenna wireless communication technology, in particular to a rate and power control method and control device for each space sub-channel. Background technique [0002] In a cellular communication system, the wireless communication conditions experienced by different communication links change at different times, different locations, and different frequencies. This change is more obvious when the mobile station moves at a high speed. On the other hand, relative to the momentary changes in wireless communication conditions, the spectral efficiency and system capacity that the system can obtain are restricted by the signal transmission technology and wireless channel conditions. Therefore, in order to obtain the maximum system spectral efficiency and Communication capacity, a signal transmission technology that can be adaptively adjusted with changes in wireless channel conditions has emerged, which is called wireless link ...

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Application Information

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IPC IPC(8): H04B7/005H04Q7/38H04B7/08H04L1/06H04W52/42
CPCH04B7/0639H04B7/0417H04L1/0025H04L1/0009H04L1/0019H04L1/0003H04W52/42H04L1/06H04B7/0626
Inventor 刘云辉张孝林
Owner LENOVO (BEIJING) CO LTD
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