The Farrell Law Firm, P.C.
Method and apparatus for signal detection in radio frequency identification system
Disclosed is an apparatus and method for signal detection according to frequency bands used in an RFID system. The apparatus includes a low-noise amplifier for low-noise amplifying a received signal, a receiver unit for detecting a CW signal and a tag signal, a transmitter unit for frequency up-converting and outputting an input signal, a PLL for generating a frequency signal according to a transmission signal band or a reception signal band, a receiver unit switch for connecting the receiver unit with the low-noise amplifier or a directional coupler, an antennas switch for connecting the antenna with the directional coupler or low-noise amplifier, and a controller unit for controlling a frequency of the frequency signal generated by the PLL, turning off transmission power in a case of an LBT scheme, controlling the receiver unit switch and the antenna switch, and determining if a corresponding channel is an idle channel.
Samsung Electronics Co., Ltd.
H H G
H04B H04B G06K
inventional inventional inventional
Chul-Hyun Sang-Yun Jong-Rim June-Hyeok Hyun-Kuk Chul-Jin
Park Hwang Lee Im Choi Kim