Abstract: An electronic price indicator according to an embodiment includes a display displaying product information, an NFC module configured to communicate with a user terminal, a Bluetooth module configured to communicate with the user terminal, and a processor configured to control the display to display the product information received from the user terminal through the Bluetooth module. The processor is further configured to release a sleep mode when receiving an interrupt from the user terminal through the NFC module, and perform Bluetooth communication with the user terminal by initiating a scan for a predetermined period of time to receive an advertising signal from the user terminal.

Abstract: There is provided a method of recovering a dropped call in a mobile communication system. When a call is dropped, a mobile station determines whether two consecutive good frames have been received on a traffic channel that was disconnected in relation to the dropped call, while searching for an adjacent base station whose signal arrives at the mobile station with a greater received signal strength using a searcher. The mobile station is assigned to a traffic channel by the searched base station using a physical channel used for data transmission and resumes the call on the traffic channel that is available earlier between the recovered traffic channel and the assigned traffic channel.

Abstract: A device for performing a handoff in a mobile communication system. A mobile station transmits a handoff request message including a measured signal power value and information about a traveling direction thereof, when signal power from an adjacent base station is higher than a threshold. A base station performs a handoff depending on the signal power and the traveling direction, upon receipt of the handoff request message.

Abstract: A pseudo noise code acquisition apparatus in a direct sequence spread spectrum receiver capable of minimizing a retard involved in the updating of a pseudo noise code sequence, thereby achieving a reduction in pseudo noise code acquisition time. The apparatus is configured to conduct a pseudo noise code update prior to a threshold comparison after a spread spectrum signal is subjected to despreading and correlation for a desired number of chips. By this configuration, when it is determined, based on the result of the threshold comparison, that acquisition of a desired pseudo noise code has failed, it is possible to receive data associated with a new pseudo noise sequence without any delay.

Abstract: There is provided a method of recovering a dropped call in a mobile communication system. When a call is dropped, a mobile station determines whether two consecutive good frames have been received on a traffic channel that was disconnected in relation to the dropped call, while searching for an adjacent base station whose signal arrives at the mobile station with a greater received signal strength using a searcher. The mobile station is assigned to a traffic channel by the searched base station using a physical channel used for data transmission and resumes the call on the traffic channel that is available earlier between the recovered traffic channel and the assigned traffic channel.

Abstract: An automatic gain controller for reducing the required code size and processing burden of a digital signal processor (DSP) chip. The automatic gain controller includes an automatic gain control (AGC) amplifier and an A/D converter for converting an analog signal output from the AGC amplifier to a digital signal. A power estimator estimates a power of a signal input from the A/D converter. An infinite impulse response (IIR) filter filters the power output from the power estimator to attenuate noises and interferences. A comparator receives the filtered power output from the filter and generates an AGC control gain. A dB-to-D/A input converter converts the AGC control gain output from the comparator to a D/A input signal. A D/A converter converts the D/A input signal output from the dB-to-D/A input converter to an analog AGC control signal and provides the AGC control signal to the AGC amplifier.