Implementation Program for CCK11M and CCK5.5M in 802.11b with FWT-Based Demodulation

In this paper, we present the implementation of CCK11M and CCK5.5M modulation schemes for the 802.11b standard, where the demodulation process employs the Fast Walsh Transform (FWT) algorithm. The implementation includes sophisticated code optimization techniques such as lookup tables for CCK code generation and parallel processing for FWT computation. We have conducted comprehensive optimizations and enhancements to improve the program's performance and stability. Through in-depth algorithm analysis and practical experimentation, we successfully implemented this functionality and achieved satisfactory results. Our improvements not only enhanced the demodulation efficiency but also reduced the bit error rate (BER), ensuring data accuracy and reliability. The implementation features key functions including: - CCK code vector generation using phase parameter mapping - FWT-based correlation detection for signal demodulation - Adaptive thresholding for improved signal recovery This work contributes to the advancement of wireless communication technology and provides valuable references for further research in high-speed wireless data transmission.