| As the progress of communication technology, cellular mobile network is now facing the R&D stage of B3G, after a sequential development and comercial usage of the first three generations. Standardizing Organizations such as IEEE and 3GPP with their research outcomes WiMAX and LTE are competing for the global standard of 4G; meanwhile, mobile device providers like Ericsson, Alcatel-Lucent, Nokia-Siemens etc., become market competitors of next-generation's wireless communication.Wireless User Equipment would have to access the network and radio resource through the procedure of Random Access. Therefore, the Random Access should be, with no doubt, one of the most essential technology of mobile communication, and the next-generation wireless network calls for a new Random Access procedure of more efficiency, less radio resouce requirement, and lower radiation level.This paper discusses the development of mobile communication, analyses the technologies such as the preamble sequence and TDD-LTE baseband signal generation of Random Access CHannle of TDD-LTE in detail.Based on the analyse of the algorithm, the dissertation compares and contrasts the performance of the radom access preambles, and chooses the best-performance sequence. Based on the analysis mentioned above, a new algorithm of the physical layer of UE peer of PRACH channel is established within MATLAB in the dissertation.The dissertation also finishes the simulation design of PRACH channel on MATLAB platform. At last, a combined debug result has been obtained using the PRACH receiver platform of LTE from TDD-LTE project group, UESTC Lab of Wireless Communication and Embed System, which prooves the validity of the algorithm, and satisfies the successful probability demand of the Tehnical Specification of LTE. |
