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A broadband wireless transmission method assisted by distributed intelligent reflectors

A broadband wireless and transmission method technology, applied in transmission systems, transmission monitoring, digital transmission systems, etc., to achieve the effects of reducing training overhead, enhancing downlink transmission rate, and reducing computational complexity

Active Publication Date: 2022-07-05
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, each IRS needs to adjust the phase shift of hundreds of reflection units in the IRS according to the optimized high-dimensional phase shift matrix. For the distributed multi-IRS auxiliary scheme, a large amount of feedback overhead for the high-dimensional phase shift matrix between the base station and each IRS become a problem for system implementation

Method used

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  • A broadband wireless transmission method assisted by distributed intelligent reflectors
  • A broadband wireless transmission method assisted by distributed intelligent reflectors
  • A broadband wireless transmission method assisted by distributed intelligent reflectors

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0036] like figure 1 The distributed IRS-aided massive multi-antenna millimeter-wave wideband OFDM system shown contains a configuration N B The base station of the dimensional antenna array, N S IRSs with M-dimensional arrays and a single-antenna user; the maximum delay L of the multipath channel between the s-th IRS and the user s , the delay power spectrum is in is the channel standard deviation at the ith time tap; the line-of-sight channel G from the base station to the sth IRS is known s . The user sends the uplink pilot frequency, the IRS and the base station perform distributed channel estimation, and the phase shift matrix of each IRS is set according to the channel state information to maximize the downlink rate.

[0037] figure 2 The relationship between the downlink traversal rate and the number M of IRS array elements i...

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Abstract

The invention discloses a broadband wireless transmission method assisted by distributed intelligent reflection surfaces, which is suitable for the field of wireless communication. According to the closed expression of the downlink traversal rate of the large-scale multi-antenna millimeter wave broadband OFDM system, the influence of each system parameter is evaluated, and the hardware construction of the IRS front is guided; in the transmission of the broadband system, the user sends the pilot signal, Estimate the reflected channel of each IRS, match the strongest time-domain taps to reduce complexity, channel estimation overhead, and feedback amount, and use the IRS phase shift matrix to match the IRS-to-user channel, base station-to-IRS channel, and base-station-to-user channel. Maximize downlink rate. It provides an IRS transmission method with low channel estimation overhead, low feedback amount and low complexity, and uses the IRS phase shift matrix to match the IRS to user channel, base station to IRS channel, and base station to user channel to maximize the downlink rate.

Description

technical field [0001] The invention relates to a broadband wireless transmission method, and is particularly suitable for a broadband wireless transmission method assisted by a distributed intelligent reflection surface used in the field of wireless communication technology. Background technique [0002] In the traditional wireless communication system, the communication channel is not controlled by the user, and the communication performance depends on the channel state. In multi-antenna systems, IRS technology provides an effective method to change the wireless communication environment. The IRS is compatible with the existing communication system, and can assist the wireless communication system by configuring a large-scale reflection array on the outer wall of the building. The IRS array contains a large number of reflective elements, each of which is equipped with a digital phase shifter. By changing the phase shift of the phase shifter, each IRS unit can independent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/145H04L25/02H04L27/26H04B17/364
CPCH04B7/145H04L25/0204H04L25/0224H04L25/0256H04L27/2601H04B17/364Y02D30/70
Inventor 许威何沐昕赵春明
Owner SOUTHEAST UNIV
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