Abstract: The present application provides a method, a device, a transmitter, and a receiver for detecting syncwords. After inserting syncwords in a data frame to be transmitted, a transmitter transmits the data frame to be transmitted inserted with a preset number of syncwords to a receiver. Because the bit-length of information in the data frame to be transmitted inserted with the preset number of syncwords is a specified multiple of the length of the syncwords, and the symbol components of the preset number of the inserted syncwords are different, or the symbol components are the same but the orders of the symbols are different, the receiver correlates each syncword of the preset number of syncwords with the data frame to be transmitted inserted with the preset number of syncwords after receiving the data frame to be transmitted.

Abstract: The present invention relates to the technical field of communications, and disclosed are a mobile station locating method and device for a cluster system. The method includes: through a control channel, activating a location information uploading function of a mobile station which needs location tracking; over a location tracking data service channel, sending a location information request message to the mobile station, the location tracking data service channel being a service channel with the same frequency as and a different time slot from the control channel; over the location tracking data service channel, receiving a location information response message sent by the mobile station, the location information about the mobile station being carried in the location information response message; and according to the location information about the mobile station, determining the current location of the mobile station.