Software-Defined Radio Used in Assistive Technology to Communicate with Neuromotor Disabled Patients

In this paper a new type of assistive system used to communicate with neuromotor disabled patient by using software-defined radio is presented. The communication with patients is based on keyword technology. The patient needs detection is performed by using a human-computer interface (adapted to the patient physical condition) and the patient message is sent to the caretaker through a radio communication system in broadcast FM or in ISM bands. Unlike other communication systems, the proposed system does not require a Server for communication, and as consequence consists only in two units (patient and caretaker units). Thus, the communication protocols between the two components of the system are simplified, and the system can be easily used for the patients treated in ambulatory care settings.