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Channel Feedback Method for Millimeter Wave Systems Based on Tensor Parallel Compression

A channel feedback, millimeter wave technology, applied in the direction of link quality-based transmission modification, modulation carrier system, baseband system components, etc., can solve the problem of large channel feedback overhead, reduce feedback overhead, etc., reduce feedback overhead, restore The effect of high precision and relaxed conditions of recovery

Active Publication Date: 2022-02-11
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] Purpose of the invention: The purpose of the present invention is to provide a millimeter wave system channel feedback method with tensor parallel compression, which can reduce the feedback overhead on the premise of ensuring the accuracy of channel feedback, and effectively solve the problem of antenna delay in the millimeter wave MIMO-OFDM system. The increase in the number of channels and the number of subcarriers leads to the problem of excessive channel feedback overhead

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  • Channel Feedback Method for Millimeter Wave Systems Based on Tensor Parallel Compression
  • Channel Feedback Method for Millimeter Wave Systems Based on Tensor Parallel Compression
  • Channel Feedback Method for Millimeter Wave Systems Based on Tensor Parallel Compression

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[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0029] figure 1 It is a system block diagram of the millimeter wave system channel feedback method based on tensor parallel compression proposed by the present invention. The millimeter wave of the present invention is a MIMO-OFDM system, the transmitting end sends the pilot signal to the receiving end through the transmitter, the receiving end receives the pilot signal through the receiver, and estimates the downlink channel state information through the channel estimation module. The receiving end transforms the channel state information into the frequency domain by performing Fourier transform. Then, according to the multi-dimensional characteristics of MIMO-OFDM channel in the frequency domain, the channel state information is modeled as a high-order tensor. This tensor is sent to the tensor compression module, and the tensor compression...

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Abstract

The present invention discloses a millimeter wave system channel feedback method based on tensor parallel compression. The terminal uses tensor parallel compression technology to compress the channel state information tensor into several tensors of the same size; 3. The receiver uses CANDECOMP / PARAFAC (CP) decomposition to decompose the above compressed tensors respectively, and obtains The factor matrix is ​​fed back to the transmitting end through the uplink feedback link; 4. The transmitting end restores the factor matrix of the original channel state information tensor according to the factor matrix currently fed back to the transmitting end, and reproduces the factor matrix obtained by restoring To construct the original channel state information, the present invention utilizes the high-dimensional characteristics of the millimeter-wave MIMO-OFDM channel, uses a high-order tensor model combined with tensor parallel compression technology, does not require the sparse characteristics of the downlink channel, and can effectively ensure feedback accuracy. Reduce feedback overhead.

Description

technical field [0001] The invention relates to the technical field of channel feedback in a communication system, in particular to a method for channel feedback of a millimeter wave system based on tensor parallel compression. Background technique [0002] As a new-generation mobile communication standard, 5G needs to substantially improve speed and other functions compared to 4G to meet users' needs for a higher quality experience. Compared with the 4G network, the system capacity of the 5G network needs to be increased by 1000 times, the energy efficiency and data rate need to be increased by 10 times, and the average cell throughput needs to be increased by 25 times. The rapid growth of data rates requires 5G to provide greater bandwidth and ultra-low latency, which cannot be achieved through the simple evolution of current wireless technologies. Frequency bands used by current mobile systems are concentrated below 6 GHz. These frequency bands have good transmission co...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0417H04B7/0413H04L25/02H04L27/26H04L1/00H04L69/04
CPCH04B7/0417H04B7/0413H04L25/0204H04L27/2626H04L27/2647H04L1/0023H04L69/04
Inventor 刘旭丁知贤杨龙祥朱洪波
Owner NANJING UNIV OF POSTS & TELECOMM
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