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A Channel Estimation Method for Millimeter-Wave Smart Metasurfaces with Cooperative Sensing on Two Time Scales

A time-scale, collaborative sensing technology, applied in channel estimation, energy reduction, advanced technology, etc., can solve the problem of not configuring radio frequency links, and achieve the effect of improving performance

Active Publication Date: 2022-08-02
HANGZHOU DIANZI UNIV
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Problems solved by technology

However, since the smart metasurface is not equipped with a radio frequency link capable of processing complex signals, the channel estimation of the analog-digital hybrid architecture assisted by the smart metasurface faces more severe challenges than the traditional channel estimation.

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  • A Channel Estimation Method for Millimeter-Wave Smart Metasurfaces with Cooperative Sensing on Two Time Scales
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  • A Channel Estimation Method for Millimeter-Wave Smart Metasurfaces with Cooperative Sensing on Two Time Scales

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Embodiment Construction

[0080] The specific implementation method of the present invention will be further described below with reference to the accompanying drawings.

[0081] like figure 2 As shown in the figure, the millimeter-wave smart metasurface channel estimation method for dual-time-scale cooperative sensing, the steps are as follows.

[0082] Step 1. Assuming that the direct link between the base station and the user is blocked by obstacles, an intelligent metasurface-assisted millimeter-wave multi-user MISO system, in which the base station is equipped with antennas and RF chain, the system has With the help of an intelligent metasurface of a reflective element, the A single-antenna user transmits a data stream. Millimeter-wave channels are slow-fading Rice channels within a coherent time slot. Due to the fixed placement of the base station and the smart metasurface and the mobility of the client, the channel characteristics between the base station and the intelligent metasurfac...

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Abstract

The invention discloses a millimeter-wave intelligent metasurface channel estimation method with dual time scale cooperative perception. Firstly, the corresponding sensing signal is designed based on the maximum distance between the base station and the smart metasurface, and the maximum blind zone distance is determined; then the corresponding sensing beamforming vector at the base station is designed. Secondly, by designing the phase shifter phase of the smart metasurface, a large time-scale collaborative sensing is performed between the base station and the smart metasurface to obtain the equivalent channel between the two. Finally, by sequentially turning on the smart metasurface units and receiving the training sequence sent by the user at the base station, the channel state information between the user and the smart metasurface in a small time scale is obtained. The present invention can accurately estimate the channel between the user terminal and the intelligent metasurface with relatively low pilot frequency through the real equivalent quasi-static channel obtained by cooperative sensing, so as to improve the performance of the communication system.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a multi-user channel estimation method of a dual-time-scale intelligent metasurface-assisted hybrid configuration millimeter-wave communication system based on cooperative perception. Background technique [0002] Millimeter-wave massive multiple-input multiple-output (massive MIMO) is one of the key technologies to meet the capacity requirements of 5G and 6G networks. However, traditional all-digital MIMO systems (i.e., each antenna is driven by an independent RF chain) face some practical issues, such as power consumption, hardware complexity, and system cost. To address the above issues, hybrid architectures (ie, a large number of antennas connected to a small number of RF chains) are proposed to strike a balance between system performance and energy consumption. However, the energy consumption of hybrid mmWave systems cannot meet the requirements o...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02
CPCH04L25/0224H04L25/024H04L25/0242Y02D30/70
Inventor 赵楼孙佳蓓刘春山
Owner HANGZHOU DIANZI UNIV
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