Simultaneous Transmission of Tomography Transceivers Using Multiple M-Sequence Signals

A tomography array which consists of five 200 Hz transceivers was deployed in the Central Equatorial Pacific in December 1998 to monitor the variability of water temperature and current in relation to El Nino. In this experiment, we intend to perform precise measurement using simultaneous transmission from five transceivers. As each transceiver receives an overlapped signal from other transceivers, multiple M-sequence signals were selected carefully and used to discriminate mutual signals among transceivers.