Reception Device Correcting Unknown Symbols Using Known Data

The patent introduces a known symbol as an intermediary element between the transmitted signal and the received signal. By inserting known symbols at regular intervals and using them as reference points for correction, the system can remove intersymbol interference without requiring aggressive filter adjustments that would amplify high frequency noise. The known symbol acts as a mediator that enables accurate signal recovery.

The patent replaces the traditional mechanical approach of adjusting filter tap coefficients with a signal processing approach using known symbols. Instead of modifying the filter characteristics to remove intersymbol interference, the system substitutes this mechanical adjustment with a computational method that uses known symbol patterns to correct and reconstruct the received signal, thereby avoiding noise amplification.

The patent divides the transmitted signal into segments separated by known symbols. Each segment contains unknown data symbols that can be corrected using the adjacent known symbols. This segmentation approach allows for localized error correction without requiring complex global signal processing, thereby improving accuracy while managing complexity through modular structure.

The patent performs preliminary action by pre-inserting known symbols into the signal stream before transmission. These known symbols are placed at predetermined intervals in advance, creating a framework that enables subsequent correction of unknown symbols. This preliminary structuring simplifies the reception process compared to attempting to correct errors without such preparatory measures.