Method, model and system of large-scale mimo communication for sky wave

Abstract

The invention discloses a sky wave massive MIMO communication method, model and system. A large-scale antenna array is used to build a sky-wave communication base station in the short-wave band, and perform sky-wave massive MIMO communication with user terminals in the coverage area through ionospheric reflection. The sky wave communication base station determines the antenna array spacing according to the highest operating frequency, uses TDD to communicate with user terminals, and uses OFDM or its power efficiency improved modulation method for signal transmission. According to the real-time ionospheric channel characteristics, the sky wave communication base station selects the carrier frequency within the short wave band range, and adaptively selects OFDM modulation parameters and signal frame structure. The Skywave communication base station uses the channel information of each user terminal to perform user scheduling to form a space division user group. Different user groups use different time-frequency resources, and the same user group uses the same time-frequency resource to communicate with the Skywave communication base station. The invention can greatly improve the frequency spectrum and power efficiency, transmission bandwidth and distance, as well as speed and terminal capacity of sky wave communication.

Description

technical field [0001] The invention belongs to the field of sky-wave communication, and in particular relates to a sky-wave communication method and system utilizing a large-scale MIMO (multiple-input multiple-output) antenna array in a short-wave band. Background technique [0002] In order to meet the application requirements of future wireless communication for global coverage, satellite communication is considered as an attractive candidate technology that can meet this requirement, and has become a research hotspot in both academia and industry. The use of sky-wave communication in the short-wave band can achieve thousands of kilometers of beyond-the-line-of-sight communication, thereby meeting the global coverage requirements of future wireless communication systems. The sky-wave communication system does not require expensive infrastructure, but it only occupies very limited spectrum resources, and its transmission relies on time-varying multipath ionospheric channel...

AI Technical Summary

Problems solved by technology

But most of them are point-to-point MIMO, and only a small improvement in system rate performance can be obtained

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