| Scientific development brings great change to our daily life, people's demands for high speed data transformation promote the development of PCS. Nowadays the 3rd mobile communication has entered the commercialization stage. In order to improve the system performance, and reduce the operation cost, we need to improve and optimize the design and implementation of the downlink channel coding system in NodeB of WCDMA .In this thesis, we analysis the needs of the downlink channel coding system , the process of channel coding and system control, give the system structure of the downlink channel coding system, and realize the system. We also improve the arithmetic that occupies the most of CPU, such as CRC, Rate Matching arithmetic, the second interleaveing arithmetic, and test the results, we also use the software optimization technologies for TMS320C6416 to optimize the software, as a result the data processing speed and user number increase, it also makes system possible to support greater flow of data for future. |
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