Adaptive bit allocation method and device in a cooperative multi-antenna system

A multi-antenna system and bit allocation technology, applied in diversity/multi-antenna systems, space transmit diversity, etc., can solve problems such as inter-cell interference, and achieve the effect of suppressing multi-user interference and

Active Publication Date: 2017-07-28
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] Embodiments of the present invention provide an adaptive bit allocation method and device in a cooperative multi-antenna system, which can solve the problem of inter-cell interference by using fixed feedback overhead to obtain the maximum transmission rate

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  • Adaptive bit allocation method and device in a cooperative multi-antenna system
  • Adaptive bit allocation method and device in a cooperative multi-antenna system
  • Adaptive bit allocation method and device in a cooperative multi-antenna system

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Embodiment Construction

[0021] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0022] Such as figure 1 As shown, the embodiment of the present invention provides an adaptive bit allocation method in a cooperative multi-antenna system, including the following steps:

[0023] Step 1, extract the data channel information of the cell, the interference channel information of the adjacent cell, the received power of the data signal and the interference signal, and the delay information of each channel according to the channel estimation;

[0024] Step 2, according to the received signal power and the delay information of each channel, respectively calculate the optimal number of feedback bits allocated for the data channel and each interference chan...

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Abstract

The invention provides a self-adaptive bit distributing method and a self-adaptive bit distributing device in a cooperative multi-aerial system. The self-adaptive bit distributing method includes: extracting the receiving power of a data signal and an interference signal and time delay information of every channel according to channel estimation; according to the signal receiving power and the time delay information of every channel, respectively calculating an optimal feedback bit number distributed to data channels and every interfering channel on the premise of fixing a total feedback bit number, minimizing rate loss caused by non-ideal state of channel information; determining the size of a codebook according to the optimal feedback bit number, selecting and transmitting corresponding code-quantified channel state information from the codebook according to a minimum chordal distance criterion by the aid of ideal channel information, and receiving the code-quantified channel state information and generating a zero-forcing pre-coding matrix according to the same. The zero-forcing pre-coding operation is performed by the aid of the obtained non-ideal channel information via a base station, and interferences among multiple users in a local cell and among neighbor cells are restrained.

Description

technical field [0001] The invention relates to an adaptive bit allocation method and device in a cooperative multi-antenna system, belonging to the technical field of wireless communication. Background technique [0002] In a wireless communication system, inter-cell interference is an important factor that degrades communication quality of cell edge users. For the user in the center of the cell, the distance between itself and the base station is relatively close, while the distance of the interference signal in the outer cell is relatively long, and the signal-to-interference-noise ratio is relatively large. For the users at the edge of the cell, since the users occupying the same bandwidth resource in the adjacent cell have greater interference to it, and they are far away from the base station, their signal-to-interference-noise ratio is relatively small, resulting in that although the overall throughput of the cell is high, but Users at the edge of the cell have poor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/06H04B7/08
Inventor 康桂霞桂鑫
Owner BEIJING UNIV OF POSTS & TELECOMM
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