Abstract:
본발명의 MIMO 전송을위한스피어디코딩을이용한 ML 검파수신기는, N 개의송신안테나와 M 개의수신안테나가마련된 MIMO 무선통신시스템에서, i번째수신안테나에서수신된잡음신호()를갖는수신신호()에대하여, 스피어디코딩을적용하여 ML 추정치()를산출하는 ML 검파수신기에있어서, 상기송신안테나로부터수신된수신신호()를처리하는신호처리부; 상기수신신호()에대하여상기채널추정치()를산출하는채널추정부; 상기채널추정치()를이용하여상기채널추정오차()를산출하는채널추정오차부; 상기채널추정오차()를이용하여실질잡음신호()를산출하고, 실질잡음신호를포함한수신신호()에대하여, 스피어디코딩을적용하여특정에의한의초기값을구하고, 초기값을이용해실질잡음신호의공분산행렬()을산출한다음, 이를이용해다른값을산출하는반복적알고리즘에의하여상기 ML 추정치()를산출하는 SD 연산/ML산출부를포함한다. 본발명의 MIMO 전송을위한스피어디코딩을이용한 ML 검파수신기및 그수신기의 ML 검파방법에따르면, 채널추정오차및 간섭신호에대한영향에강인한 ML 검파수신기를설계함으로써, 간섭영향을완화하여수신기성능향상을도모할수 있다.
Abstract:
본 발명은 열차 선로의 태그 위치 측정 시스템에 관한 것이다. 이는 선로(R) 상의 특정 위치를 측정하기 위하여 추진 및 제동용 차륜(19, 21)과 추진 및 제동이 이루어지지 않는 한 쌍의 별도의 차륜(23, 24)을 구비하는 차량(11)을 구비하는 열차 선로 위치 측정 시스템(10)으로서, 외부로부터 무선으로 GPS 위치정보를 수신하기 위한 GPS 수신부(15)와; 상기 한 쌍의 별도의 차륜(23, 24) 각각에 설치되어 상기 차륜의 회전에 따라 이동거리에 관한 정보를 출력하는 한 쌍의 오도미터(17, 18)와; 상기 GPS 수신부(15) 및 상기 한 쌍의 오도미터(17, 18)로부터 위치 측정값을 각각 수신하고, 수신된 위치 측정값을 소정의 알고리즘에 의해 처리하여 상기 선로 상의 특정 위치의 위치값을 결정하는 제어단말(13)을 포함하여 구성된다. 이에 따라, GPS 위치 측정값과 한 쌍의 오도미터의 위치 측정값을 선택적으로 이용함으로써, 다양한 환경을 통과하여 배치되어 있는 선도 상의 특정 위치의 위치값을 항상 정확하게 측정할 수 있어, 단 한 번의 측량으로도 정확한 위치값을 획득할 수 있도록 하는 등의 현저한 효과를 제공한다.
Abstract:
The present invention relates to an inter-train distance control system. The inter-train distance control system according to an embodiment of the present invention includes: onboard train control units (20) which are arranged on respective trains running on a track (R) and periodically reports the detection information detected by an internal location detection device (26) from an onboard antenna (22) to a ground train control unit (10) through a ground antenna (12); and the ground train control unit (10) which identifies all trains within a coverage area to calculate the safe distance between the trains, and assigns the movement authority (MA) to the onboard train control units (20) respectively based on the calculated distance.
Abstract:
The present invention relates to a system and method for determining suitability of a track circuit according to distribution of return current. The purpose is to provide a system and method capable of determining the suitability of a track circuit as measurement and analysis of return current can be measured more precisely by measuring, in the identical condition until return current passes a designated section, return current at least at three spots, such as a substation, electricity-assorting station, and sub-electricity-assorting station, into which return current flows, through time synchronization, contrary to the previous method, which measures return current without time synchronization and the identical condition. The present invention of the above purpose relates to a track circuit suitability determination system measuring return current at least at three spots including two return current flow-in spot and one spot between the two return current flow-in spot by return circuit distribution and includes a return current-measuring unit measuring return current until a train passes a designated section with the identical condition at least the three spots and a data-analyzing unit using data measured at a measuring spot through the return current-measuring unit simultaneously to analyze a distribution of return current to determine the suitability of the track circuit. [Reference numerals] (A) Current; (AA) Return current; (BB) Measured data at a first point; (CC) Measured data at a second point; (DD) Measured data at a third point; (EE) Overlap; (FF) Time
Abstract:
The present invention relates to a train integrity monitoring system and, specifically to a train integrity monitoring system (TIMS) which transmits and receives car connection information of a connected car by being installed in each car of a train and which recognizes a separated car location and performs integrated train operation monitoring when the train is separated. The TIMS comprises: a first transmission and reception unit for transmitting car connection information of a current car to a TIMS in an adjacent car and receiving car connection information of the adjacent car; a second transmission and reception unit for transmitting car the connection information of the current car when the car connection information is received from the TIMS in the adjacent car; a control unit for analyzing the car connection information received by the first and second transmission and reception units and transmitting the car connection information including location data on a separated car if the analyzed car connection data includes the car location data; and a data output unit for transmitting the location data on the separated car to a train control system (TCS) performing integrated train operation control. According to the present invention, a TIMS is installed in each car of a train and monitors whether a cars is separated in real time by transmitting car connection information. If a car is separated, a TIMS in an adjacent car generates and transmits car connection information including location data on the separated car. Therefore, prompt action can be taken by recognizing whether a car is separated and the exact location of the separated car.
Abstract:
본 발명은 궤도회로를 이용한 이동폐색과 고정폐색의 혼합 운행 시스템 및 방법에 관한 것으로서, 궤도회로에서 선행열차의 선로점유정보를 수신하는 신호기계실의 궤도회로 송수신수단과, 상기 궤도회로 송수신수단을 통해 수신된 선로점유정보를 무선 송출하는 지상 CBTC 장치와, 후행열차에 설치되어 상기 지상 CBTC 장치에서 송출된 선로점유정보를 수신하는 차상 CBTC 장치로 구성되는 것을 특징으로 하는 궤도회로를 이용한 이동폐색과 고정폐색의 혼합 운행 시스템과 그 운행 방법을 제공한다. 본 발명에 따르면, 기존의 ATP(또는 ATS 또는 ATC) 시스템이 장착된 선로 및 차량을 CBTC 시스템과 혼용하더라도 개량시 ATP(또는 ATS 또는 ATC) 시스템의 궤도회로를 통해 검지되는 선행열차의 선로점유정보를 CBTC 시스템이 장착된 후행열차로 제공하여 안정적인 열차 제어를 수행하고, 운전시격을 단축시킬 수 있다.
Abstract:
PURPOSE: A railway transportation system capable of allowing passengers to get on and off a train during the non-stop driving is provided to transport many passengers by installing a moving walk for getting on and off at a stop. CONSTITUTION: A moving walk for getting on and off (110) is installed at a stop. A vehicle (20) passes the stop without stopping. A vehicle moving installation (120) moves the vehicle. A vehicle control system controls the moving walk for getting on and off. The vehicle control system controls the vehicle moving installation. [Reference numerals] (100) Platform; (102) Alighting area; (104) Boarding area; (AA) Moving walk (alighting); (BB) Exit; (CC) Entrance; (DD) Moving walk (boarding)