Samsung Electronics Co., Ltd.

Chan-Young Kim

Jun-hyung Kim

Byoung-Jae Bae

Yun-Sang Park

Jun-Hee Lim

Sang-Hoon Sung

Jae-Hwan Chang

Jae-Ho Song

Doo-young Kim

Chung-Ho Shin

Woon-Haing Hur

A method and apparatus for controlling a Radio Frequency Integrated Chip (RFIC) in a wireless communication system are provided. The method includes detecting an event for changing a signal receiving cell of the RFIC, determining whether a Serial Peripheral Interface (SPI) control command for a target cell is pre-stored based on information of the target cell, and configuring the RFIC based on the pre-stored SPI control command if the SPI control command for the target cell is pre-stored.

Method and apparatus for controlling radio frequency integrated chip in wireless communication system

A method and apparatus of searching for an operator network in a multi-Radio Access Technology (RAT) environment are provided. The method, calculating a length of a sleep interval to perform background Public Land Mobile Network (PLMN) searching, comparing the length of the sleep interval with a predetermined reference parameter, if the length of the sleep interval is larger than the reference parameter, performing background PLMN searching of a passive RAT during the sleep interval, and if the length of the sleep interval is equal to or smaller than the reference parameter, performing background PLMN searching of an active RAT during the sleep interval.

Method and apparatus of searching for operator network in a multi-radio access technology environment

In a logic circuit, a first switching device is connected between a first voltage and an output terminal through which an output signal is output. The switching device is selectively activated and deactivated based on an input signal. A second switching device is connected to a ground voltage and is selectively activated and deactivated based on the input signal. A control circuit outputs a control signal in response to the input signal. The control signal has a first voltage level during a first time period in which a state of the input signal changes, and has a second voltage level during a second time period in which a state of the input signal is constant. The second voltage level is lower than the first voltage level. A field relaxation circuit is connected between the terminal through which the output signal is output.

Logic circuits with electric field relaxation transistors and semiconductor devices having the same

A method and apparatus for estimating interference and noise power in an orthogonal frequency division multiplexing/orthogonal frequency division multiple access/discrete multi-tone (OFDM/OFDMA/DMT) system is disclosed. A correlator correlates a plurality of sub-carriers with a preset reference sequence on an element-by-element basis and outputs a result of the correlation. A signal noise producer calculates a difference between a correlation value associated with each of the plurality of sub-carriers output from the correlator and a correlation value produced from at least one adjacent sub-carrier and outputs a result of the calculation. An interference and noise power producer produce interference and noise power from the difference between the correlation values calculated by the signal noise producer.

Apparatus and method for estimating interference and noise in a communication system

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Bucheon-si, South Korea

Chan-Young Kim