Abstract: The invention relates to an avalanche transceiver, having a transmitting unit for transmitting at least one transmit signal, a receiving unit for receiving at least one transmit signal from at least one further avalanche transceiver, and a control device for controlling at least one loudspeaker. The control device is designed to control the at least one loudspeaker to output at least one voice message on the basis of at least one event. The at least one event is associated with a search for the at least one further avalanche transceiver. The invention further relates to a method for operating such an avalanche transceiver.

Abstract: The invention relates to an avalanche transceiver, having a transmitting unit for transmitting at least one transmit signal, a receiving unit for receiving at least one transmit signal from at least one further avalanche transceiver, and a control device for controlling at least one loudspeaker. The control device is designed to control the at least one loudspeaker to output at least one voice message on the basis of at least one event. The at least one event is associated with a search for the at least one further avalanche transceiver. The invention further relates to a method for operating such an avalanche transceiver.

Abstract: A search system for searching buried persons is provided including a radio device with a receiving device including at least one receiving antenna and adapted to receive the field of a transmitter antenna, wherein the radio device is adapted to determine the direction of the field vector of the transmitter antenna relative to the at least one receiving antenna; as well as a user interface device with at least one interface for interfacing with the radio device, as well as at least one output device for outputting search information derived from the direction of the determined field vector and perceivable by a user; wherein the radio device and the user interface device are each formed as separate units, which are each encompassed by an own housing, and wherein the search system includes determining means for determining the relative orientation of the user interface device to the radio device. Moreover, it relates to a corresponding method for search a buried person.

Abstract: The present invention relates to a method for searching a transmitter. Therein, the vectorial magnetic field strengths of the field emitted by the transmitter are detected for at least a first and a second measurement point relative to a reference axis of the detector carried by a searcher. Furthermore, at least one orientation difference (?2??1) between the first and the second measurement point is detected. Based on certain assumptions, the vectorial magnetic field strengths are calculated and subsequently a function (E) of an error vector (g) representing the difference between the calculated and the measured vectorial magnetic field strengths is numerically minimized for determining an updated position vector. Moreover, the invention relates to a corresponding detector.

Abstract: A search system for searching buried persons is provided including a radio device with a receiving device including at least one receiving antenna and adapted to receive the field of a transmitter antenna, wherein the radio device is adapted to determine the direction of the field vector of the transmitter antenna relative to the at least one receiving antenna; as well as a user interface device with at least one interface for interfacing with the radio device, as well as at least one output device for outputting search information derived from the direction of the determined field vector and perceivable by a user; wherein the radio device and the user interface device are each formed as separate units, which are each encompassed by an own housing, and wherein the search system includes determining means for determining the relative orientation of the user interface device to the radio device. Moreover, it relates to a corresponding method for searching a buried person.

Abstract: The present invention relates to a method for searching a transmitter. Therein, the vectorial magnetic field strengths of the field emitted by the transmitter are detected for at least a first and a second measurement point relative to a reference axis of the detector carried by a searcher. Furthermore, at least one orientation difference (?2??1) between the first and the second measurement point is detected. Based on certain assumptions, the vectorial magnetic field strengths are calculated and subsequently a function (E) of an error vector (g) representing the difference between the calculated and the measured vectorial magnetic field strengths is numerically minimized for determining an updated position vector. Moreover, the invention relates to a corresponding detector.

Abstract: A searching apparatus, especially an avalanche transceiver, including a receiving unit (22) for receiving transmission signals for locating a transmitter and a transmitting unit (20) for transmitting transmission signals, wherein at least a first (10) and a second transmitting antenna (12) are associated with at least the transmitting unit (20), which are disposed in the searching apparatus oriented in different spatial directions, wherein only one of the transmitting antennas (10; 12) is in operation in the transmission mode, wherein the searching apparatus further includes: at least one position sensor (28) adapted to determine a spatial position of the searching apparatus and to provide a position signal on its output, which is correlated with the spatial position; and a switching device (16) coupled to the at least one position sensor (28) for supplying the position signal on the one hand and to the at least one first (10) and second transmitting antenna (12).

Abstract: The present invention relates to a searching apparatus, especially an avalanche transceiver, including a receiving unit (22) for receiving transmission signals for locating a transmitter and a transmitting unit (20) for transmitting transmission signals, wherein at least a first (10) and a second transmitting antenna (12) are associated with at least the transmitting unit (20), which are disposed in the searching apparatus oriented in different spatial directions, wherein only one of the transmitting antennas (10; 12) is in operation in the transmission mode, wherein the searching apparatus further includes: at least one position sensor (28) adapted to determine a spatial position of the searching apparatus and to provide a position signal on its output, which is correlated with the spatial position; and a switching device (16) coupled to the at least one position sensor (28) for supplying the position signal on the one hand and to the at least one first (10) and second transmitting antenna (12) on the other

Abstract: Search device for locating a transmitter, in particular an avalanche-victim search device (1), such that for scanning a search area the search device (1) is swiveled by a user through a range of search angles that covers the region to be searched, which independently determines the position of an avalanche victim or several such victims in a reliable and economical manner, with a magnetic-field sensor that sends to a signal-processing means sensor signals related to the earth's magnetic field that are then sent on as processed signals to the output unit, and to every search direction there is assigned a fixed search angle relative to the earth's magnetic field, so that at every time it is possible to associate the signal received from a transmitter with a fixed search angle.

Abstract: Search device for locating a transmitter, in particular an avalanche-victim search device (1), such that for scanning a search area the search device (1) is swiveled by a user through a range of search angles that covers the region to be searched, which independently determines the position of an avalanche victim or several such victims in a reliable and economical manner, with a magnetic-field sensor that sends to a signal-processing means sensor signals related to the earth's magnetic field that are then sent on as processed signals to the output unit, and to every search direction there is assigned a fixed search angle relative to the earth's magnetic field, so that at every time it is possible to associate the signal received from a transmitter with a fixed search angle.

Abstract: The invention relates to a method for securely transmitting data by hiding in point-to-point and point-to-multi-point digital transmission systems. The data stream (DS) on the transmitter side is supplied to a modulation unit (MOD). The modulation and coding parameters (MP) of the modulation process (MV) and of said modulation unit (MOD) can be changed in time. The modulation parameters (MP) are transmitted to a demodulator (DEM) by means of a secure channel (SK). The electric transmission signal (ES) is situated at the output of the modulation unit (MOD). Said signal is transmitted by means of a channel (K). The demodulator (DEM) that knows the hiding sequence regenerates the original signal and supplies the receiving data stream (DE) at the output.

Abstract: The invention concerns a procedure for determining the signal-to-noise ratio (&rgr;) of a signal (y) with wanted signal components (x) and noise signal components (n), it being assumed that the noise signal components (n) have a Gaussian distribution. In order that the signal-to-noise ratio of the signal (y) can be calculated in an accurate and reliable manner, including, in particular, when there are only relatively few measurement values (S) per measurement interval or when there is only a relatively poor signal (y) with a high noise signal component (n), it is proposed that the signal (y) be manipulated, before the signal-to-noise ratio (&rgr;) is determined, in such a way that the noise signal components (n) have a greater probability of having a Gaussian distribution. It is proposed, according to a development, that a noise signal (n′) with a known power be added to the signal (y). The noise signal (n′) preferably has a Gaussian distribution.