Middle-frequency transmission method and middle-frequency interface for base-station to realize radio-frequency zoom-out

Abstract

í«Distant positioned radio frequencyí» places transceiver of base station near to antenna and far apart from devices of base station. Using medium frequency transmission, the invention implements technique of í«distant positioned radio frequencyí» in order to solve issue of small covering radius of sub zone, and high cost of base station caused by radio wave propagation property in 2GHz frequency range The medium frequency transmission separates transceiver part in analog radio frequency from digital signal process in base band of devices of base station so as to form a public unit in room and multiple remote front end devices in radio frequency, where interface in medium frequency is located between them. Being connected in series or star form through wired or wireless modes, the interface implements services, reference clock, frequency conversion, encoding and path jointing etc, for various control signals. Features are: convenience and cheap.

Description

technical field [0001] The present invention relates to a design method of wireless base station equipment in the third generation mobile communication system, more precisely, relates to an intermediate frequency transmission method and an intermediate frequency interface capable of realizing remote radio frequency in the base station equipment of the third generation mobile communication system. Background technique [0002] The typical design scheme of the base station equipment of the existing mobile communication system is to install the receiving antenna and the transmitting antenna outdoors, install the radio frequency transceiver indoors, and connect the radio frequency transceiver, the receiving antenna and the transmitting antenna with a low-loss radio frequency cable. RF transceivers basically use discrete components or low-integration chip designs. [0003] In recent years, with the demand for wireless base stations of the third-generation mobile communication sys...

AI Technical Summary

Problems solved by technology

However, in the third-generation mobile communication system, since the system quality of service (QoS) must be guaranteed, the introduction of repeaters will inevitably lead to a decline in service quality, so the third-generation mobile communication system cannot simply use repeaters in principle.

However, so far there is no effective and relatively convenient technology to solve blind area coverage

[0013] When the radio frequency cable or optical fiber cannot be installed between the indoor unit and the outdoor unit (for example, it needs to cross the street in the city), it will not be possible to realize the remote radio frequency, that is, the wireless connection between radio frequency or intermediate frequency signals cannot be realized

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