초록 ▼

An OFDM receiver system for performing precise OFDM demodulation is provided. The OFDM receiver system performs demodulation by sharing memories and operators in a time-divisional manner. FFT-processed data is separated into specific pilot signals and data according to the timing indicated by a cont

An OFDM receiver system for performing precise OFDM demodulation is provided. The OFDM receiver system performs demodulation by sharing memories and operators in a time-divisional manner. FFT-processed data is separated into specific pilot signals and data according to the timing indicated by a controller to then be rearranged and stored, thereby facilitating extraction of corresponding pilot signals and data for various synchronization and equalization steps. Therefore, the demodulation system having an optimal structure can be realized in view of resource utilization efficiency and chip areas, the cost and time for fabricating and designing the system can be reduced, and verification of the system can be easily performed.

대표청구항 ▼

1. An orthogonal frequency division multiplexing (OFDM) receiver system comprising:a receiving section for receiving an OFDM signal, converting the same into a digital signal and compensating for phase error and for frequency error of the digitally converted OFDM signal; a pilot signal decoding sect

1. An orthogonal frequency division multiplexing (OFDM) receiver system comprising:a receiving section for receiving an OFDM signal, converting the same into a digital signal and compensating for phase error and for frequency error of the digitally converted OFDM signal; a pilot signal decoding section for FFT-processing the output of the receiving section, and sequentially storing pilot signals and data separately according to a rearrangement rule; a synchronizing section for receiving the output of the pilot signal decoding section, performing coarse time synchronization, coarse frequency synchronization, frame synchronization, fine frequency synchronization and fine time synchronization, estimating a phase noise and correcting the same; an equalizing and deinterleaving section for performing a channel equalization algorithm on the output of the pilot signal decoding section using a reference pilot signal of the synchronizing section, restoring the equalized symbol into the original symbol, and rearranging the symbol in the order of the original symbol; and a controller for controlling the timing of data rearrangement in the pilot signal decoding section and feed-back controlling the receiving section according to the outputs of the respective synchronization results.