DE-9SA-N-SMR

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Introduction
DE-9SA-N-SMR stands for “Direct Energy Transfer System – 9th Collection Subsystem Application Network System for Maritime Radio Communications”. It is a maritime communications system developed by the United States Navy to provide a direct communication link between US Navy ships and their shore-based support elements. This system was designed to provide a reliable and robust communications link, allowing the US Navy to quickly transfer large amounts of time-sensitive data and communications information. The direct energy transfer (DE) system was developed to address the need for a maritime communications system that could provide an immediate and secure communications link between ships and shore.

Application Field
The DE-9SA-N-SMR system has many applications in the military and commercial communications fields. The system is used in a wide variety of applications, such as providing voice responses to shipboard communications and providing surveillance of ship movement. The DE-9SA-N-SMR system is used aboard US Navy ships for a variety of purposes, including:

• Voice communications
• Data communications
• Maritime surveillance
• Military exercises
• Search and rescue operations
• Emergency communications

The system is also used by many commercial shippers to improve the efficiency of their operations. The system provides reliable and secure communication links to enable shippers to track and monitor the progress of their shipments. The DE-9SA-N-SMR system is used by commercial airlines to monitor their flight paths and maintain communication with their aircraft. In addition, the system is used by many government agencies and law enforcement organizations to provide secure communication links and improve their operational efficiency.

Working Principle
The DE-9SA-N-SMR system is based on a radio frequency (RF) link between the ship and the shore. The ships are outfitted with a directional antenna that is oriented toward the shore. The antenna is used to transmit radio frequency signals to the shore, which are then decoded and converted into digital data by the system. The radio frequency signals are then transmitted to the shore station for decoding and conversion into their respective format. The system utilizes a variety of forms of modulation techniques such as Quadrature Amplitude Modulation (QAM) and Frequency Modulated Continues Wave (FMCW). The system utilizes Frequency Division Multiplexing (FDM) to increase throughput and provide a higher level of reliability.

The DE-9SA-N-SMR system is capable of providing transmission speeds of up to 512 kbps. This is considerably faster than conventional radio telemetry systems, which typically operate at speeds of only 128 kbps. In order to ensure secure transmissions, the system is designed to use encryption algorithms to encrypt the data before it is transmitted. The system also utilizes error-correction techniques to minimize signal interference and improve reliability.

The DE-9SA-N-SMR system is an effective and reliable communications system for marine environments. It provides high-speed, secure, and reliable radio frequency communications links between ships and shore. The system is capable of transmitting large amounts of data in a very short period of time, making it ideal for time-sensitive communications between ships and shore.

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