Codeword Reordering Unit for OFDM Profile Management

The patent pre-calculates multiple mapping orders and their corresponding spectral efficiencies before transmission. The CRU has a library of pre-computed mapping orders, allowing it to quickly select the optimal one without real-time computation, thus improving spectral efficiency while maintaining low complexity.

The system changes the mapping order parameter dynamically based on channel conditions and user profile requirements. By adjusting which codeword maps to which symbol position, the system optimizes spectral efficiency without changing the underlying hardware or complex architecture.

Mapping orders and their spectral efficiency metrics are pre-calculated and stored in the CRU. During operation, the CRU only needs to retrieve and apply the appropriate pre-computed mapping order based on current channel conditions, avoiding computationally intensive real-time optimization while maintaining high spectral efficiency.

The CRU autonomously selects and applies optimal mapping orders based on pre-stored information and current channel state, without requiring external processing assistance. This self-service capability enables the system to maintain high spectral efficiency using minimal processing resources at the MTS.

The CRU is designed as a multi-functional unit that handles codeword reordering, mapping optimization, and spectral efficiency optimization within a single hardware component. This universal approach increases transmission capacity without proportionally increasing overall hardware complexity, as one unit performs multiple optimization functions.

The system optimizes transmission capacity by changing software-controlled parameters (mapping orders, codeword assignments) rather than adding complex hardware structures. The CRU manipulates data arrangement parameters to achieve capacity improvements while maintaining hardware simplicity and compatibility with existing DOCSIS architectures.