16QAM Soft Demodulation Method
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Resource Overview
16QAM soft demodulation technique suitable for integration with Turbo codes and LDPC codes, extensible to higher-order modulation schemes following similar implementation principles
Detailed Documentation
The 16QAM soft demodulation method is a modulation and demodulation technique particularly suitable for integration with error-correcting codes like Turbo codes and LDPC codes. This approach can be extended to higher-order modulation and demodulation scenarios using similar implementation logic. The algorithm typically involves calculating log-likelihood ratios (LLRs) for each bit position by evaluating Euclidean distances between the received signal and constellation points. Key implementation aspects include constellation mapping, noise variance estimation, and efficient computation of bit metrics using approximation methods like max-log-MAP to reduce computational complexity while maintaining performance. Code implementations often utilize lookup tables for constellation points and optimized distance calculations to enhance real-time processing capabilities.
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