Abstract:
신호 복조를 위하여 임계값을 적응적으로 설정하는 방법 및 장치가 개시된다. 일 실시예에 따른 임계값을 적응적으로 설정하는 방법은 미리 정해진 심볼 구간에 대한 이전 수신 심볼의 복조값, 구체적으로는 복조값이 0인 이진 수신 심볼과 복조값이 1인 이전 수신 심볼의 개수를 비교하여 획득한 비교값을 기초로 현재 수신 심볼의 복조를 위한 임계값을 적응적으로 설정할 수 있다.
Abstract:
PURPOSE: An ultra low power super-regenerative receiving device and a method thereof are provided to improve the performance of low selectivity while maintaining a frequency bandwidth of a channel used for transmitting a symbol. CONSTITUTION: A bit synchronizer (411) estimates pulse-level positions having the maximum amplitude value in one cycle of a received symbol by using a value sampled from a signal outputted from a super-regenerative oscillator. A frame synchronizer (413) combines the determined multiple pulse-level positions based on the estimated pulse-level positions. The frame synchronizer performs frame synchronization by detecting a predetermined bit sequence using the combined multiple pulse-level positions. A data detector (420) detects data by using the determined multiple pulse-level positions after the frame synchronization.
Abstract:
PURPOSE: A method and device for estimating an arrival angle are provided to estimate AoA(Angle of Arrival) using a second steering vector. CONSTITUTION: A phase difference calculator(820) calculates a first steering vector to a target AoA estimating device. The phase difference calculator calculates the phase differences in an antenna elements which are included in an arrange antenna in order to calculate a second steering vector corresponding to the rotated angle of the AoA estimating device. A candidate value extractor(830) extracts two or more candidate values about the AoA of the received signal based on the first steering vector.