Channel state information feedback method, base station, terminal equipment and system

Abstract

The invention discloses a channel state information feedback method, a base station, terminal equipment and a system. The channel state information feedback method comprises the steps that the terminal equipment receives a reference signal transmitted by the base station; the terminal equipment determines channel state information according to the reference signal; and the terminal equipment transmits the channel state information to the base station so as to enable the base station to determine a pre-coding matrix F, wherein the pre-coding matrix F=C1C2W, C1 is a first level pre-coding matrix, C2 is a second level pre-coding matrix, and W is a third level pre-coding matrix. The channel state information corresponding to the first level pre-coding matrix C1 comprises information of a beam, the channel state information corresponding to the second level pre-coding matrix C2 comprises long-term broadband channel information, and the channel state information corresponding to the third level pre-coding matrix W comprises instantaneous channel information. The channel state information feedback method can reduce the overall pilot and CSI (Channel State Information) feedback overhead and thus improves the stem throughput.

Description

technical field

[0001] The present invention relates to the communication field, and more specifically, to a method, base station, terminal equipment and system for channel state information feedback. Background technique

[0002] The emergence of multiple input multiple output (Multiple Input Multiple Output, MIMO) technology has brought revolutionary changes to wireless communication. By deploying multiple antennas on both the transmitting end device and the receiving end device, MIMO technology can simultaneously provide multiple channels independent of each other, thus increasing the data transmission rate exponentially. MIMO technology uses precoding. In the traditional one-level precoding structure, the number of radio frequency channels is the same as the number of transmitting antennas.

[0003] Massive MIMO (Massive MIMO) can improve link quality, improve cell coverage, and improve system performance by using a large number of antennas to achieve a significant inc...

Examples

Embodiment Construction

[0060] The following will describe the technical solutions in the embodiments of the patent application with reference to the drawings in the embodiments of the patent application. Apparently, the described embodiments are part of the embodiments of the patent application, not all of them. Based on the embodiments in this patent application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this patent application.

[0061]With the continuous development of communication theory and practice, more and more wireless communication technologies have begun to appear and gradually mature. The above wireless communication technologies include but are not limited to Time Division Multiple Access (TDMA) technology, Frequency Division Multiple Access (FDMA) technology, Code Division Multiple Access (CDMA) technology, Time Division Synchronization Code Division Multiple Access (Time Division-Synchr...

technical field

[0001] The present invention relates to the communication field, and more specifically, to a method, base station, terminal equipment and system for channel state information feedback. Background technique

[0002] The emergence of multiple input multiple output (Multiple Input Multiple Output, MIMO) technology has brought revolutionary changes to wireless communication. By deploying multiple antennas on both the transmitting end device and the receiving end device, MIMO technology can simultaneously provide multiple channels independent of each other, thus increasing the data transmission rate exponentially. MIMO technology uses precoding. In the traditional one-level precoding structure, the number of radio frequency channels is the same as the number of transmitting antennas.

[0003] Massive MIMO (Massive MIMO) can improve link quality, improve cell coverage, and improve system performance by using a large number of antennas to achieve a significant inc...

Examples

Embodiment Construction

[0060] The following will describe the technical solutions in the embodiments of the patent application with reference to the drawings in the embodiments of the patent application. Apparently, the described embodiments are part of the embodiments of the patent application, not all of them. Based on the embodiments in this patent application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this patent application.

[0061]With the continuous development of communication theory and practice, more and more wireless communication technologies have begun to appear and gradually mature. The above wireless communication technologies include but are not limited to Time Division Multiple Access (TDMA) technology, Frequency Division Multiple Access (FDMA) technology, Code Division Multiple Access (CDMA) technology, Time Division Synchronization Code Division Multiple Access (Time Division-Synchr...

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