Design And Implementation Of Cell Search In TD-LTE

The thesis is concentrated on the design and implementation of cell search and physical channel decoding in TD-LTE according to the requirement of project,which belongs to the national key scientific instrument and equipment development "The Research and Implementation on High Performance Spectrum Analyzer(Project ID:2012YQ20022404)".1.The algorithm of cell search is designed and implemented.The primary synchronization signal algorithm based on auto-correlation,cross-correlation and parial correlation is analysed and investigated which addressing the problem of computational complexity and timing synchronization inaccuracy caused by frequency offset,compared the results of timing synchronization,a primary synchronization signal timing synchronization scheme based on partial correlation is adopted.The CP type and antenna port number detection algorithm is selected to furtherly improve the complexity performance of cell search algorithm through the alalysis of literature.2.The physical channel decoding is designed and implemented.The decoding of physical broadcast channel,physical control format indicator channel,physical hybrid automatic repeat request indicator channel,physical downlink control channel and the demodulation of physical downlink shared channel is designed in detail for different downlink channel.The inverse mapping of resource element is focused for the purpose of facilitating signal test and analysis acording to set different inverse mapping indicator to classify physical channel.Besides,the common part of decoding is designed.Moreover,TD-LTE signal test and analysis system is designed,which analyses the functions and outputs.The actual signal is tested and verified in Matlab to test whether the system meets the project requirement or not.Besides,we compare and evaluate our measurement result with Agilent 89600 VSA in terms of performance.The test and verification results show that the designed and implemented cell search algorithm has good performance in terms of robustness and low complexity,the designed and implemented physical channel decoding Algorithm is reliable and can be applied to signal test and alalysis system.The performance items approaches Agilent 89600 VSA and fulfill project requirement under the same conditions.