Design And DSP Implementation Of LTE Small Cell's Uplink

In the high-frequency high-bandwidth 4G era,Small Cell is such an important part of the 4G era network,becoming the protagonist of the 4G era because it can improve the nature of the overall system capacity.With the popularity of 4G,more and more scenes need the Small Cell for its lower cost,easier layout and good performance.Especially in the urban CBD area,the millimeter wave will lead to the Small Cell camouflage more difficult to distinguish,at the same time,a variety of digital calibration methods will realize the transformation from the macro base station to the low power Small Cell.In the future,the Small Cell will gradually become an important growth point in 5G communications.Therefore,it is of great significance to study how to use a dedicated DSP chip to achieve a more high-speed and stable,widely commercial LTE Small Cell.Through the study of the 3GPP protocols,this thesis select the Freescale processor BSC9132,and finish the whole design of the LTE uplink and DSP optimization of PRACH and PUSCH modules.The main contents can be summarized as follows.(1)Through the study of 3GPP protocol,the symbol generation process of PRACH and PUSCH is understood.The building of MATLAB simulation platform and the improvement of the algorithm are completed by learning literatures and derivation,including channel-related processing such as channel estimation,equalization and Doppler estimation and equalization.(2)This thesis describes how to distribute the specific work of two DSP core,adjust the timing,and complete the general structure of DSP after chsoosing the Freescale processor BSC9132.(3)This thesis introduces the DSP program optimization that transplanted from the MATLAB code,includeing the PRACH and PUSCH module code,so as to shorten the module processing time.Through simulation and debugging,the high-speed and stable communication between the Small Cell and the UE can be realized and commercialized.