High efficiency stable TD-SCDMA (time division-synchronization code division multiple access) time division switch searching system and method

Abstract

The invention discloses a high efficiency stable TD-SCDMA (time division-synchronization code division multiple access) time division switch searching system and a method. The system comprises a finite-state machine and a synchronous code number counter, wherein the output end of the finite-state machine is connected with a first input end of the synchronous code number counter; the output end of the synchronous code number counter is successively connected with a digital matched filter for receiving IQ (intelligence quotient) input data, a correlation value judgment module, a threshold decision processing module, a switching point module and a time-division switching indication module, wherein a first output end of the threshold decision processing module is connected with the input end of the switching point module; and a second output end of the threshold decision processing module is also connected with a second input end of the synchronous code number counter. The high efficiency stable TD-SCDMA time division switch searching system and the method can be used in low speech-noise ratio condition, the realization manner is simple, efficient and stable, and the high efficiency stable TD-SCDMA time division switch searching system and the method are widely used in a correspondence industry.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an efficient and stable TD-SCDMA time division switch search system and method. Background technique [0002] Digital wireless repeater is an indispensable part of mobile communication, which realizes signal amplification and ensures the stability of signal during transmission. However, in the TD-SCDMA digital wireless repeater, when the time-division switch is switched incorrectly, the signal may be seriously distorted, and mobile communication cannot be carried out accurately. The current technology is mainly that the repeater first makes a preliminary judgment based on the power characteristics of the downlink pilot time slot. There is a zero power zone at both ends of the downlink synchronization code SYNC_DL of the downlink pilot time slot, which are respectively the downlink pilot time slot itself. The guard interval GP and the uplink guard interval GP; and the downl...

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Problems solved by technology

[0003] However, in the case of low signal-to-noise ratio, the TD-SCDMA time-division switch search effect is poor, and the uplink and downlink switching positions cannot be correctly obtained.

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