Qualcomm Incorporated

Chae Kwan Lee

Jong Hyeon Park

Je Woo Kim

Ju Won Park

Bok Tae Sim

Tae Ryun Chang

Sameer Nanavati

Methods and apparatus for automatic gain control (AGC) and DC calibration for orthogonal frequency-division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) systems are provided in an effort to avoid saturation of the analog-to-digital converter (ADC) in a radio frequency (RF) front end of a receiver, to handle dynamic received signal power, or to avoid interruptions in a communication link for DC calibration. For certain embodiments, the quantization error in the RF front end may also be decreased.

Methods and systems of AGC and DC calibration for OFDM/OFDMA systems

A synchronization and detection method in a wireless device may include performing coarse detection and synchronization with respect to a received signal. The synchronization and detection method may also include performing fine detection and synchronization for acquisition of the received signal. Results of the coarse detection and synchronization may be used for the fine detection and synchronization. The synchronization and detection method may also include performing tracking mode processing when the acquisition of the received signal has been achieved.

Methods and apparatus for synchronization and detection in wireless communication systems

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San Jose, CA, United States of America

Chae Kwan Lee