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Construction method of channel information quantization codebook in multi-antenna system and device thereof

A multi-antenna system and channel information technology, which is applied to the construction of channel information quantization codebooks in multi-antenna systems, can solve the problems of not being independent, poor dual-polarized channel performance, and inability to match channel characteristics between dual-polarized antennas.

Inactive Publication Date: 2010-03-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing codebook design for channel information quantization feedback is mainly considered for the correlation and uncorrelation of the single-polarization antenna channel, and the dual-polarization antenna has a wider application prospect in practical applications, and gradually It has become a mainstream application, especially when the number of antennas is greater than or equal to 4, but some characteristics of dual-polarization channels are often very complicated, such as dual-polarization correlation channels, which only show strong correlation in the same polarization direction However, there is no strong correlation between polarization directions. Dual-polarization uncorrelated channels show independent properties in the same polarization direction, but there is no relationship between polarization directions. not independent
[0015] At present, the existing codebook construction technologies are all considered for the application scenarios of single-polarized antennas. The channel of the antenna matches the channel characteristics very well, and the performance shown in the dual-polarized channel is poor

Method used

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  • Construction method of channel information quantization codebook in multi-antenna system and device thereof
  • Construction method of channel information quantization codebook in multi-antenna system and device thereof
  • Construction method of channel information quantization codebook in multi-antenna system and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0167] Eight adaptive dual-polarization correlation channel codeword construction u in 8-antenna Rank2 1 ~ u 8 It is eight 4-dimensional vectors as shown in Table 2 below:

[0168] Table 2

[0169] u 1 ＝[1 1 1 1]

u 5 =[1 q0 j q1]

u 2 =[1 j -1 -j]

u 6 =[1 q1 -j -q0]

u 3 ＝[1 -1 1 -1]

u 7 =[1 q2 j q3]

u 4 =[1 -j -1 j]

u 8 =[1 q3 -j q2]

[0170] in: q 0 = ( 1 + j ) / 2 ; q 1 = ( - 1 + j ) / 2 ; q 2 = ( - 1 - j ) / 2 ; ...

Embodiment 2

[0178] N-adaptive dual-polarization correlation channel codeword construction in 8-antenna Rank2

[0179] Select 16 4-dimensional vector u 1 ~ u 16 , for any n

[0180]

[0181] θ n = - π 2 + ( n - 1 ) π N , n = 1 ~ N

[0182] construct codeword

[0183] CW n = u n u n u n - u n ...

Embodiment 3

[0185] N adaptive dual-polarization correlation channel codeword construction in 8-antenna Rank1

[0186] Select N 4-dimensional vector u 1 ~ u n , method is the same as embodiment 1 or embodiment 2

[0187] Transmitter Antenna Polarization is the most common scenario, when the receiving end is a laptop or mobile phone placed vertically. At this time, the code word is constructed as

[0188] RW n = u n u n , n = 1 ~ N

[0189] If the receiver is polarization

[0190] RW n = u n j ...

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Abstract

The invention discloses a construction method of a channel information quantization codebook in a multi-antenna system and a device thereof. In the invention, channel code words of which the ranks ofa channel matrix are 1 and 2 are established according to relevant properties of a channel and antenna polarization properties of a sending end and a receiving end to form the channel information quantization codebook, wherein, the channel information quantization codebook comprises the channel code words of which the ranks of the channel matrix are 1 and 2 and which are matched with dual polarization; and the channel code words comprise relevant channel code words and / or irrelevant channel code words. By adopting the invention, the quantization codebook meeting the dual-polarized channel information feedback requirement can be established, and good channel matching characteristic can be obtained for the channel of dual-polarized antenna in the multi-antenna system.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and a device for constructing a channel information quantization codebook in a multi-antenna system. Background technique [0002] In wireless communication, if both the transmitting end and the receiving end use multiple antennas, spatial multiplexing can be used to obtain a higher rate. Compared with the general spatial multiplexing method, an enhanced technology is: the receiving end feeds back the channel information to the sending end, and the sending end uses some transmit precoding techniques according to the channel information obtained from the receiving end to greatly improve the transmission performance. The simple utilization method is to directly use the channel feature vector information for precoding, which is mainly used in single-user MIMO, and there are other better but more complicated methods, which are mainly used in multi-user MIMO. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00H04B7/04
CPCH04L1/0028H04L1/06H04L1/0026
Inventor 陈艺戬郁光辉戴博朱嵘彦杨勋
Owner ZTE CORP
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