Abstract:
본 발명은, 기존 위성항법 시스템과 비교해 도플러 쉬프트와 간섭에 강인한 독자적인 위성항법 신호체계를 확보할 수 있는 위성 항법 신호 생성 방법 및 그 장치에 관한 것으로서, 본 명세서에 개시된 실시예에 따른 위성 항법 신호 생성 장치는, 기준 클럭 속도를 N 분주한 클럭을 근거로 2차 코드(Secondary Code)를 생성하는 2차 코드 생성부와; 상기 N의 길이의 이진 코드를 생성한 후 상기 생성된 이진 코드를 변조시켜 1차 코드(Primary code)를 생성하는 1차 코드 생성부와; 상기 1차 코드의 한 주기에 상기 2차 코드 1 칩을 곱함으로써 다상 코드(Tiered Polyphase code)를 생성하는 다상 코드(Tiered Polyphase code) 생성부를 포함할 수 있다.
Abstract:
The present invention relates to a global navigation satellite system and, more specifically, to a transmitter which generates ± signature codes (hereinafter referred to as sign signature codes) by generating a unique signature code using two sub-chirps consisting of a down chirp which sweeps from high band to low band and an up chirp which sweeps from low band to high band and multiplying a navigation message with the unique signature codes. According to the present invention, an independent global navigation satellite system different from an existing global navigation satellite system using BPSK and BOC spreading codes can be secured.
Abstract:
PURPOSE: A method of providing heading data to land navigation systems is provided to rapidly supply accurate azimuth angle by performing a verification route and an azimuth angle verification route. CONSTITUTION: In a method of providing heading data to land navigation systems, the current position and stature and warn information of a moving unit which are calculated from an inertial navigation system when stopping driving(S301). When driving is resumed, the position, stature, and warn information are read. The read data is verified through an information effectiveness verification route(S302). When data is effective, the effectiveness of an azimuth angle is verified through the azimuth angle verification route(S303).
Abstract:
본 발명은 GPS(Global Positioning System) 신호 획득 시스템 및 방법에 관한 것으로서, 더 상세하게는 Delay-Multiply 기법을 이용한 코드 위상 획득 과정을 통하여 정확한 코드 위상을 획득한 후 다단계 부분 상호 상관기를 이용하여 반송파 위상 획득을 하는 일차원 구조의 저복잡도 GPS 신호 획득 시스템에 대한 것이다. 본 발명에 따르면, 제안된 반송파 위상 획득 구조는 일차원적 GPS 신호 획득 과정에서 반송파 위상오차에 강인한 Delay-Multiply 기법을 이용하여 코드 위상을 적확히 획득한 이후에 동작 하지만 극복 가능한 반송파 위상오차의 크기가 최대 50kHz 이다.
Abstract:
The present invention relates to a global positioning system (GPS) signal acquisition system and a method thereof and, more specifically, to a one-dimensional GPS signal acquisition system with low complexity for acquiring a carrier phase using a multi-stage partial cross-correlator after acquiring an accurate code phase through a code phase acquisition process with a Delay-Multiply technique. According to the present invention, a proposed carrier phase acquisition structure operates after acquiring the accurate code phase accurately using the Delay-Multiply technique which is resistant to carrier phase errors in an acquisition process of the one-dimensional GPS signal, wherein the maximum size of the allowable carrier phase errors is 50 kHz. [Reference numerals] (110) Signal reception unit; (120) Code copy unit; (130) Code phase acquisition unit; (140) Carrier wave phase acquisition unit; (150) Carrier wave phase error compensation unit; (160) Compensating signal; (AA,BB) Time control signal; (CC) Phase signal
Abstract:
The present invention relates to a wireless positioning system and more specifically, to a wireless positioning system for realizing a time difference of arrival (TDoA) wireless positioning algorithm using an ultra wideband (UWB) asynchronous reference node. According to the present invention, it is easy to extend a wireless positioning range because the positioning algorithm enabling accurate position measurement in a TDoA position measurement system using an asynchronous reference node capable of performing UWB communication does not require an external signal source or an additional algorithm for synchronization between reference nodes. [Reference numerals] (S400) Start (i=0); (S420) Acquire TDoA, RSS information from each reference node; (S430) Set prior target node position as initial position; (S440) Set initial position by RSS based positioning; (S450) Undetermined LSS estimator; (S460) Update target node coordinate; (S480) Confirm target node position (i=i+1)