Acoustic Data Transmission via Frequency-Subchannel Segmentation

The patent divides the wide-band acoustic channel into multiple frequency-separated sub-channels, each processed by separate modulators and demodulators. This segmentation allows parallel data transmission across different frequency bands, achieving high bit rates (e.g., 10 Mbit/s or higher) while keeping each individual modulator relatively simple. The data splitter and data combiner further support this segmented approach by distributing and recombining data streams across sub-channels.

The patent applies different modulation schemes to different frequency sub-channels based on their specific characteristics. Some sub-channels may use simpler modulation (e.g., BPSK) while others use more complex schemes (e.g., QAM), optimizing the overall system for high bit rate transmission. This local optimization allows achieving 10 Mbit/s or higher bit rates without requiring all components to be equally complex.

By segmenting the wide-band channel into frequency-separated sub-channels, the patent can apply different processing techniques to each sub-channel. This segmentation helps mitigate multi-path propagation effects, as different frequency components experience different attenuation and delay characteristics. The receiver can process each sub-channel independently, improving overall signal quality while maintaining high bit rate transmission.

The patent uses partial action by activating only the necessary number of frequency sub-channels and modulators based on the required bit rate. Rather than always operating at maximum capacity, the system can dynamically adjust the number of active sub-channels, reducing power consumption when full bandwidth is not needed while still achieving high bit rates (e.g., 10 Mbit/s) when required.