Abstract: A system for controlling the movement of at least one limb of a person's body includes an interface unit in communication with the person's body for receiving an input signal. A polynomial processor generates a control signal as a polynomial function of the at least one input signal. A generator generates a functional electrical stimulation signal. A plurality of electrodes stimulates the movement of the at least one limb by introducing the functional electrical stimulation signal to the at least one of a plurality of inactive muscles.

Abstract: A communication unit (103) transmits a concurrent monitoring request to a base station (102). Responsive to the concurrent monitoring request, the base station provides multiple communications from at least one dispatch position (101) and at least one other communication unit (104) to the communication unit. Upon reception of the multiple communications, the communication unit simultaneously renders the multiple communications audible, allowing an operator of the communication unit to concurrently monitor the multiple communications.

Abstract: An improved digital signal detector for indicating the presence of digital data used in a communication system. While attempting to detect valid data, the detector buffers an incoming signal in a first-in, first-out buffer and allows locally generated data, instead of the buffered signal, to be coupled to an output. After detecting valid data, the detector estimates where in the buffer valid data commenced and either releases data from that point or further delays the signal up to the maximum length of the buffer before releasing it to the output. The invention provides high sensitivity and rapid detection, reduces variation in detection time over previous methods, and allows locally generated data to be inserted into the signal path without loss of valid data.