Design And Implementation Of TC-OFDM Indoor Positioning Supplement System Signal Generator

With the rapid development of the world,Location Based Service(LBS)is becoming more and more important.Recently indoor positioning has received increasing attention from scientists and industries.Indoor positioning supplement system is one of the main components and effective supplement for indoor positioning signal resource to resolve the positioning signal coverage of blind area in complicated indoor environment based on current communication network and existing equipment.This paper focuses on the key technology of indoor positioning supplement system signal generator in TC-OFDM(Time&Code Division-Orthogonal Frequency Division Multiplexing)system.The signal generator is designed and verified in actual application environment.The detailed research contents are as follows:1)The capture and track method to TC-OFDM positioning signal is proposed and the theoretical analysis is given.The method of using the residual carrier to discipline the local clock,and the method of using the local code generator in pseudo code tracking loop to implement code synchronization are analyzed and proved.The system model and verification are given.2)The theoretical basis of the positioning signal generation process is given.A PN sequence generation algorithm based on storage-broadcast is presented,which effectively reduced the consumption of hardware resources.3)The architecture of indoor positioning supplement system signal generator with digital signal processing SOPC as the core is proposed.The TC-OFDM baseband signal processing module and indoor positioning signal generating module are designed.The actual performance of TC-OFDM indoor positioning supplement system signal generator is tested.