Concatenated Encoding Structure for BER and Transmission Efficiency

The error control code is segmented into multiple sub-codes (first error control code, second error control code, third error control code) with different coding rates. This allows the system to divide the encoding task into multiple stages, where each sub-code handles specific error correction needs, thereby achieving high reliability without requiring a single high-rate code that would reduce efficiency.

The system dynamically changes coding rates by selecting different combinations of sub-codes based on channel conditions and error patterns. By adjusting the effective coding rate through parameter selection rather than using a fixed high-rate code, the system maintains high error correction capability while adapting transmission efficiency to actual needs.

The redundant bits are segmented across multiple sub-codes rather than concentrated in a single long redundant bit sequence. Each sub-code contributes a portion of the error detection capability, allowing the system to achieve high detection precision through distributed redundancy rather than excessive concentrated redundancy that would harm efficiency.

The system applies error detection codes selectively based on detected error patterns. When errors are detected in specific portions of the data, only the relevant sub-codes with appropriate redundancy are activated, avoiding the overhead of applying full high-rate coding to all data uniformly, thus maintaining efficiency while achieving necessary detection precision.