Core Logic Inc.

Ki Cheol Jeong

Yung-Hoon Jo

Provided are an orthogonal frequency division multiplexing (OFDM) receiving apparatus and a mode detecting method thereof. The mode detecting method includes: detecting a first mode of a received signal by using first delay signals obtained by delaying the received signal, and first correlation values of the received signal; and detecting a second mode of the received signal by using second delay signals obtained by delaying a first correlation value corresponding to the first mode from among the first correlation values, and the first correlation value corresponding to the first mode. According to the OFDM receiving apparatus and the mode detecting method, a fast Fourier transform (FFT) mode is detected first and then a guard interval (GI) mode is detected based on a result of detecting the FFT mode from the same signal, and thus mode detection is accurately and quickly performed and the OFDM receiving apparatus has a reduced chip size.

OFDM receiving apparatus and mode detecting method thereof

Provided are a universal blind mode detector capable of universally detecting not only various orthogonal frequency division multiplexing (OFDM) communication services but also non-OFDM communication services, and a fast Fourier transform (FFT) mode detector, a guard mode detector, and a memory sharing structure of the universal blind mode detector, and a method of detecting a universal blind mode. The universal blind mode detector includes a radio frequency (RF) tuner converting a received signal into a baseband frequency signal, an automatic gain control (AGC) unit which is connected to the RF tuner and determines existence of a communication service by referring to a received signal strength indication (RSSI), a communication service mode detection unit determining of which scheme a communication service mode signal is if the AGC unit determines that there is the communication service, and detecting the communication service mode signal, and a channel decoding unit detecting the detected signal.

Universal blind mode detector, guard mode detector of the universal blind mode detector, and method of detecting universal blind mode

Among others, techniques, systems and apparatus are described for estimating a channel in an orthogonal frequency division multiplexing (OFDM) communication system. A method of estimating a channel in an orthogonal frequency division multiplexing (OFDM) communication system includes sequentially receiving symbols. Each symbol includes pilots and data. The pilots included in each of first n symbols of the sequentially received symbols are placed in first areas of a memory component used for channel estimation. Data in second areas disposed between the first areas of the memory component are estimated. The pilots of at least one symbol after the nth symbol of the sequentially received symbols are placed in the first areas and the estimated data is updated in the second areas.

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Seoul, South Korea

Ki Cheol Jeong