The invention provides an urban rail train spread spectrum ranging method based on a composite spread spectrum sequence. The method comprises the following steps that: a first train maps Logistic withan m sequence to form a spreading code in a link mode of an inner code and an outer code, sends the spreading code to a second train, and stores the sent spreading code; after receiving the spreadingcode, the second train forwards the spreading code to the first train; the first train synchronizes the spreading code forwarded back by the second train with the stored spreading code to obtain theshift times between the forwarded spreading code and the stored spreading code, and calculates the time interval value between the transmitted spreading code and the received spreading code accordingto the shift times; and the distance between the first train and the second train is calculated according to the time interval value. The advantages of high adaptability, all-weather performance, highprecision and the like of spread spectrum ranging are fully utilized, the spread spectrum ranging method based on the composite sequence is provided, train-to-train ranging is directly performed, thecommunication transmission process is simplified, the transmission time delay can be reduced, and the driving efficiency is improved.
本发明提供了一种基于复合扩频序列的城轨列车扩频测距方法。该方法包括:第一列车将Logistic映射与m序列以内码外码的链接方式构成扩频码,将扩频码发送给第二列车,并将发送的扩频码进行存储;第二列车接收到扩频码后,将扩频码转发给第一列车;第一列车将第二列车转发回的扩频码与存储的扩频码进行同步处理,得到转发回的扩频码与存储的扩频码之间的移位次数,根据移位次数计算出发射的扩频码与接收的扩频码之间的时间间隔值,根据时间间隔值计算出第一列车与第二列车之间的距离。本发明充分利用扩频测距适应性强、全天候、精度高等优势,提出基于复合序列的扩频测距方法,直接进行车车测距,简化通信传输流程,可减小传输时延,提高行车效率。
Urban rail train spread spectrum ranging method based on composite spread spectrum sequence
一种基于复合扩频序列的城轨列车扩频测距方法
01.01.2021
Patent
Elektronische Ressource
Chinesisch
IPC: | B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC |