DVB-T/H Receiver Phase Error Correction via FFT Spectrum Shifting

The patent extracts and removes the harmful phase noise component from the CPE correction process while preserving the useful phase error correction function. By identifying and eliminating the specific source of phase noise in conventional methods, the invention achieves clean phase error compensation without introducing additional interference to the OFDM signal demodulation.

The patent converts the phase error information, which is normally considered a harmful distortion, into a useful measurement for correction. By utilizing the phase error data constructively and applying appropriate correction algorithms, the invention transforms the harmful effect into a beneficial process that improves signal quality without generating additional phase noise.

The patent merges the functions of delay buffers and phase accumulators into the existing FFT processing architecture. By integrating phase error correction directly into the frequency domain processing stage, the invention eliminates the need for separate memory elements and processing components, thereby reducing overall device complexity while maintaining correction effectiveness.

The patent makes the FFT processing unit multi-functional by enabling it to perform both spectral analysis and phase error correction in a unified process. This universal approach allows the same hardware block to handle multiple tasks, eliminating the need for dedicated delay buffers and phase accumulators, thus simplifying the receiver architecture.