Method for monitoring wireless high-frequency-amplification station isolation degree using pilot frequency multi-channel signal

Abstract

The method includes following steps: (1) reading out process data in inner searcher of built in monitoring module inside wireless direct station system; the data includes ratio of carry and interfere Ec / Io and timing mark; (2) calculating out ratio of carry and interfere of pilot signal in main path for wireless direct station, and ratio of carry and interfere of pilot signal in multiple paths fed from the direct station under restriction of time window; (3) calculating out allowance of separation for system of direct station; allowance of separation = ratio of carry and interfere of pilot signal in main path - ratio of carry and interfere of pilot signal in multiple paths fed from the direct station. Useful effects are: monitoring allowance of separation at any time so that system of direct station is protected in state of enough allowance (adjusting gain of direct station). The invention makes system of direct station high reliable, high safe and high self-adaptive.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a method for monitoring the isolation degree of wireless repeaters by using pilot frequency multipath signals. Background technique [0002] Mobile communication plays a huge role in our lives, and the wireless coverage technology of mobile communication is also developing continuously. Now operators require seamless coverage, and China has a vast land and sparse population, and the population distribution is uneven. In many places, such as rural areas, Roads, railways, tunnels, small underground parking lots, small building interiors, and pilot polluted areas (CDMA system), due to the small traffic, cost considerations, and mobile phone switching speed considerations, etc., all require a large number of wireless repeaters In the opening and operation of the wireless repeater, the antenna isolation is the main parameter considered in the system consideration and engineering inst...

AI Technical Summary

Problems solved by technology

[0002] Mobile communication plays a huge role in our lives, and the wireless coverage technology of mobile communication is also developing continuously. Now operators require seamless coverage, and China has a vast land and sparse population, and the population distribution is uneven. In many places, such as rural areas, Roads, railways, tunnels, small underground parking lots, small building interiors, and pilot polluted areas (CDMA system), due to the small traffic, cost considerations, and mobile phone switching speed considerations, etc., all require a large number of wireless repeaters In the opening and operation of the wireless repeater, the antenna isolation is the main parameter considered in the system consideration and engineering installation. If the isolation margin between the donor antenna and the retransmission antenna is less than the system requirement ( The general requirement is greater than 15dB), which will lead to a rapid decline in system performance, signal distortion, and waste of power. In severe cases, it will cause self-excitation and interfere with the network. In CDMA systems (including WCDMA / CDMA2000) due to the soft handover mechanism, the uplink interference can be extended to a large base station. , affecting the coverage of the base station. In the actual system, environmental changes such as the antenna being blown away by the wind, and new reflectors near the antenna will affect the isolation. Real-time monitoring of the isolation margin is very important for the safe operation of the network.

[0003] The traditional method is to bring a signal source and a spectrum analyzer during installation, and connect them to the donor antenna and the retransmission antenna respectively to test the isolation between the antennas. The other is to bring a signal source and a spectrum analyzer (module) inside the repeater to detect the isolation, which will increase the cost because transmitting a certain signal will interfere with the network operation; another method is to detect the downlink output of the repeater The power makes it never produce clipping, because the clipping may be self-excited, but this method is not sensitive enough to distinguish the situation close to self-excitation (it cannot meet the requirement that the detection isolation margin is greater than 15dB); there is also a It is a spectrum analyzer (or module) for detecting the frequency spectrum of the output signal of the repeater, that is, detecting the flatness in the channel band (CDMA2000 and WCDMA system), because when the isolation margin is not enough, the frequency spectrum in the output channel band will be uneven. However, the sensitivity of this method is not high enough (it cannot meet the requirement that the detection isolation margin is greater than 15dB); it also increases the cost

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