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Design method of zero-forcing precoder based on similarity of image structure

A technology of zero-forcing precoding and structural similarity, which is applied in the direction of climate sustainability, advanced technology, sustainable communication technology, etc., can solve problems such as the inability to guarantee user signal structure information, reduce matrix calculations, and ensure image structure information , the effect of simple method

Active Publication Date: 2021-04-02
WUHAN UNIV OF SCI & TECH
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Problems solved by technology

However, the zero-forcing precoder designed with the power signal-to-noise ratio as the optimization goal cannot guarantee the structural information of the user signal, especially when sending image signals.

Method used

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  • Design method of zero-forcing precoder based on similarity of image structure
  • Design method of zero-forcing precoder based on similarity of image structure
  • Design method of zero-forcing precoder based on similarity of image structure

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Embodiment 1

[0060] A zero-forcing precoder design method based on image structure similarity. Such as figure 1 with figure 2 As shown, this embodiment is used in a multi-user MIMO communication system: the image received by the base station and needs to be sent to the jth user is s j , where j=1, 2..., M', M' represents the number of users; the user's data vector received by the base station at k time is s(k), the dimension is M×1, M=M'; b( k) represents the data vector sent by the data vector s(k) after being processed by the zero-forcing precoder F(z), the dimension is N×1, and N represents the number of base station antennas; Noise data vector, the dimension is M×1; v(k) represents the noise vector at time k, the dimension is M×1.

[0061] The zero-forcing precoder design method described in this embodiment is: a stable and discrete channel is known, the transfer function matrix of the channel is H(z), and the subchannel allocated to the jth user by the base station is H j , where...

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Abstract

The invention relates to a zero-forcing precoder design method based on image structure similarity. According to the technical scheme, known stable transfer function matrix functions of discrete channels are H (z), sub-channels distributed to the jth user are Hj, and j = 1, 2-M ', M' represents the number of users. And a sending image sj to be sent to the jth user by the base station is interferedby white noise with known power spectrum in the transmission process. According to the channel transfer function matrix H (z) and a zero forcing condition, calculating a structural similarity expression between an image received by a user and an image sent by a base station to obtain a parametric expression of a precoder F (z); And the optimal parameter in the F (z) expression is obtained according to the LMI linear inequality, so that the structural similarity between the image received by the user and the image sent by the base station is maximized. The method has the advantages that the method is simple, low limiting power can be adapted, and it is guaranteed that a user receives image structure information to the maximum extent.

Description

technical field [0001] The invention belongs to the technical field of zero-forcing precoder design. In particular, it relates to a design method of a zero-forcing precoder based on image structure similarity. Background technique [0002] The MIMO system has been widely concerned for its advantages of high speed and large capacity, and has become one of the key technologies of the mobile communication system. After the communication system introduces multiple antennas, the MIMO channel is decomposed into multiple independent parallel sub-channels, which greatly improves the transmission rate and capacity of the system. However, the multi-user MIMO system has the problem of signal interference between users, which cannot guarantee the accuracy of transmission. In a multi-user MIMO system, there is inter-symbol interference and inter-channel interference between user signals. Due to the limitation of terminal battery power and signal processing capability, the user end cann...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/0452
CPCY02D30/70
Inventor 盛玉霞周伦雄柴利
Owner WUHAN UNIV OF SCI & TECH