Cooperative Concatenated Coding for Equal-SNR Wireless Links

The patent segments the channel coding into two distinct parts: an outer code that provides spatial diversity through cooperative transmission, and an inner code that provides additional coding gain through joint-user encoding. This segmentation allows each code to specialize in its strength while working together to overcome the limitation of conventional coded cooperation.

The patent creates a composite coding structure by combining two different channel codes (outer and inner codes) with distinct functions. The outer code handles spatial diversity while the inner code provides additional coding gain, forming a composite solution that leverages the strengths of both coding approaches to achieve performance benefits even when users operate at equal SNR.

The patent introduces dynamic adaptability at the inner code level while maintaining outer code consistency. Users can adapt their inner code parameters based on their individual channel conditions and message characteristics, allowing the system to dynamically optimize performance for each user while preserving the cooperative spatial diversity structure through the common outer code.

The patent applies local quality by allowing different inner code configurations for different users based on their specific conditions (message size, channel quality), while maintaining a uniform outer code structure across all cooperating users. This enables each user to have optimized local coding parameters without compromising the global cooperative diversity structure.