Data transmission method and system actively utilizing multipath effect

A technology of data transmission system and multipath effect, which is applied in the direction of transmission system, phase modulation carrier system, electrical components, etc., can solve the problem of eliminating multipath effect, achieve the elimination of multi-carrier intermodulation interference phenomenon, and accurately estimate channel parameters and robustness, overall volumetric weight reduction effect
CN111541459BActive Publication Date: 2022-02-22西安英诺视通科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
西安英诺视通科技有限公司
Publication Date
2022-02-22

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Abstract

The invention discloses a data transmission method and system which actively utilizes the multipath effect, and is used for solving the problem of intersymbol interference caused by the multipath effect in broadband wireless communication. When the volume, weight, power consumption, antenna gain, and communication bandwidth of the communication terminal are limited, serious multipath effects occur, and the MIMO-OFDM technology and spread-spectrum-based Rake receiving technology cannot be used to solve the problem. The present invention can realize high-speed data reliable transmission. Because FDM reduces the symbol rate of each channel several times, the frame structure with cyclic prefix and cyclic suffix can absorb long two-way intersymbol interference, so the maximum multipath delay difference allowed by the system can adapt to many important applications. Based on multiple rounds of partial symbol judgment, reconstructed signal cancellation, and minimum mean square error frequency-domain equalization method for re-detection of remaining symbols, the system can achieve a bit error rate lower than the decoding threshold under the worst channel conditions, and a chain link when transmitting 2Mbps. The path characteristics can be close to free space propagation.
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Description

technical field

[0001] The invention belongs to the technical field of communication and relates to data transmission, in particular to a data transmission method actively utilizing multipath effects and a wireless communication system formed therefrom, which are applied to broadband wireless communication, scattering communication and ground-air communication. Background technique

[0002] The biggest obstacle to the development of broadband wireless communication is the multipath effect. In addition to line-of-sight (LOS) transmission, electromagnetic waves have many reflection and refraction paths, and their strength may be very strong; the maximum distance difference between these transmission paths may reach several Hundreds of meters or even thousands of meters, the corresponding transmission delay difference is thousands of times of the radio frequency carrier period; therefore, when they are transmitted to the receiving end and added, the signal at each moment is rand...

Claims

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