Time slot synchronizing and time slot power detecting methods and systems applied to global system for mobile communication (GSM)

Abstract

The invention discloses time slot synchronizing and time slot power detecting methods applied to a global system for mobile communication (GSM). The time slot synchronizing method comprises the following steps of: performing sampling rate conversion on the base band data I and Q of a broadcast channel (BCH); extracting the base band data IF and QF of a frequency correction channel (FCCH), capturing a frequency burst (FB) and outputting a time slot rough synchronizing pulse signal; and extracting the base band data IS and QS of a synchronization channel (SCH), capturing a synchronization burst (SB) and outputting a time slot precise synchronizing pulse signal. The time slot power detecting method comprises the steps of the time slot synchronizing method and the step of calculating the time slot power of a GSM signal according to the time slot precise synchronizing pulse signal. The invention also provides time slot synchronizing and time slot power detecting systems applied to the GSM. By the technology, the time slot of the GSM signal of a repeater can be precisely synchronized, and the time slot power can be accurately detected at the same time, so that synchronization reference is provided for the time slot turn-off of the power amplifier of a base station.

Description

technical field [0001] The invention relates to the application technology of the mobile communication system, in particular to a time slot synchronization and time slot power detection method and system applied to the GSM system. Background technique [0002] At present, the GSM mobile communication system adopts time division multiplexing technology (TDMA). Each basic frame includes 8 time slots, and multiple basic frames form a multiframe, and the user's call and related control signals only occupy one of the time slots. Therefore, not all 8 time slots have signals for a certain carrier in a certain time period, especially when the traffic volume is small, only a few of them have signals, while the current GSM direct broadcast In the station, no matter whether the equipment status is busy or idle, and whether each time slot is occupied by users, the power amplifier in the equipment is always on, and the power consumption in the equipment is the largest, accounting for the...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a time slot synchronization and time slot power detection method and system applied to the GSM system, which solves the problem that the GSM communication system repeater is difficult to achieve time slot synchronization and the time slot power detection is inaccurate in the case of lack of baseband data signaling information. The problem of not being able to provide a synchronization reference for the time slot shutdown of the amplifier

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