关键词:虚拟无线电;WiMAX;卷积 Turbo 码;迭代译码;SIMD I 南京邮电大学硕士研究生学位论文 Abstract Abstract The use of software radio for wireless communication systems is an important direction for future development. Virtual radio is the latest trend in software radio development, which is based on general computer instead of application-specific devices to realize digital signal processing. The virtual radio WiMAX system studied in this thesis is an important foundation to explore the green broadband wireless communications. The bottleneck of communication system based on general computer is the real-time performance of CPU signal processing. Therefore, complex algorithm and time-consuming module need to be optimized. The WiMAX system channel coding uses Convolution Turbo Codes, which has high coding efficiency, good performance and low decoding delay compared with Turbo Codes. But the Max