Mobile Broadcast Signal Encoding for Robust Reception in Noisy Channels

The patent segments the transmitted signal into multiple orthogonal frequency division multiplexing (OFDM) carriers instead of using a single VSB carrier. This segmentation allows the signal to be distributed across multiple frequency sub-carriers, providing robustness against channel fading and interference while maintaining implementation feasibility through standardized OFDM processing blocks.

The patent changes the fundamental transmission parameter from single-carrier VSB modulation to multi-carrier OFDM modulation. This parameter change transforms the system's resistance to channel variations and noise, enabling reliable reception in mobile and poor channel environments while maintaining practical implementability through established OFDM techniques.

The patent applies forward error correction (FEC) encoding preliminarily to mobile service data before transmission. This preliminary encoding action prepares the data to withstand channel variations and noise, and the decoding process at the receiver uses pre-established algorithms that manage complexity through standardized error correction procedures.

The patent introduces known data (pilot signals or training sequences) as an intermediary element between the transmitter and receiver. These known data sequences facilitate channel estimation and equalization, enabling the receiver to compensate for channel effects without requiring excessively complex processing, thus bridging the gap between enhanced reliability and manageable complexity.