Multi-input multi-output base station and method for sending and receiving signal by using base station

Abstract

The invention discloses a multi-input multi-output base station and a method for sending and receiving a signal by using the base station. The base station comprises a signal processing unit, N amplifying units, N power dividers and antennae, wherein the signal processing unit is used for modulating a signal to be sent into N paths of signals in the sending state and combining and modulating the received signals in the receiving state, and N is an integer greater than 1; each amplifying unit is used for amplifying the power of one path of signal received from the signal processing unit in the sending state and performing low noise amplification on a signal received from a power divider in the receiving state; each power divider is used for dividing one path of signal received from the amplifying unit into multiple paths of signals in the sending state and combining signals received from the antennae into one path of signal in the receiving state; and each antenna is used for sending K paths of signals received from connected K power dividers through links in different polarizing directions in the sending state respectively and sending signals received on the links in different polarizing directions to correspondingly connected power dividers in the receiving state, and K is the number of antenna polarizing directions.

Description

Technical field [0001] The present invention relates to the field of wireless communication, and more specifically, to a multiple-input multiple-output (MIMO) base station and a method for transmitting and receiving signals using the multiple-input multiple-output (MIMO) base station. Background technique [0002] The 802.11n wireless base station is a high-power wireless access point that supports the 802.11n protocol and has complete waterproof, lightning-proof, dust-proof, and shockproof measures to meet various harsh environments in the wild and is suitable for large-area outdoor coverage. [0003] In the prior art, the MIMO system is the core wireless communication technology using the 802.11n protocol. Generally speaking, a MIMO system can use multiple antennas at the transmitting end to send multiple signals independently, and use multiple antennas at the receiving end to receive and restore the original signal. For the same signal from the transmitting end, because multipl...

AI Technical Summary

Problems solved by technology

[0006] In the case of existing MIMO base stations using multi-polarized directional antennas, when there are obstacles in a non-visible environment, signal transmission will undergo reflection and refraction, and due to the small coverage angle of the directional antenna, reflection and refraction A part of the final signal will fall out of the receiving range of the wireless base station or the user, making it difficult to effectively use the multiple-input multiple-output characteristics of the MIMO base station

If the user requires to ensure 360-degree omni-directional coverage, three or four identical antenna devices are usually required, and the network deployment and maintenance costs are relatively high

[0007] However, in the case of existing MIMO base stations using omnidirectional antennas, compared with directional antennas, the gain of omnidirectional antennas is smaller, resulting in smaller coverage, so it is difficult to meet user needs

[0008] In addition, the clients currently used by users are basically 1×1 or 2×2 MIMO 11n network cards or ordinary 11g network cards. If they are connected to existing 4×4 MIMO wireless The user can only receive 2 of the 4 signals on the direction of the terminal), which causes a waste of air resources. Compared with the 2×2 MIMO wireless base station, the 4×4 MIMO wireless base station uses more antennas, so the other The interference caused by the same frequency equipment will be greater

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