A radar device includes a radar signal outputting unit that repeatedly outputs radar signals whose frequency changes with the passage of time, at a non-uniform repetition period.

A method for determining the fill level of a fill substance located in a container. The method, which is based on the pulse travel time principle, is distinguished by the fact that extra-range echos can be recognized. For this, the method includes two method portions, in which microwave pulses are transmitted in the direction of the surface of the fill substance with different repetition rates in measuring cycles following one after the other. In each method portion, travel times are ascertained. The fill level is ascertained based on the first travel time and/or based on the second travel time, to the extent that they approximately agree. Otherwise, it is assumed that such echo pulses concern extra-range echos. Thus, by means of the method of the invention, it can be assured for pulse radar-based fill-level measurements that extra-range echos do not result in erroneous fill level values.

An autonomous system with no Customer Network Investment is described, wherein the system is configurable to operate on in a band in addition to the LTE band. Such system allows the definition of hybrid operations to accommodate the positioning reference signals (PRS) of LTE and already existing reference signals. The system can operate with PRS, with other reference signals such as cell-specific reference signals (CRS), or with both signal types. As such, the system provides the advantage of allowing network operator(s) to dynamically choose between modes of operation depending on circumstances, such as network throughput and compatibility. The system further enables information collected at a network device to be processed at a locate server without involving any processing at the network device.

In an emission process for remote sensing, pulse signals (630) are periodically produced in elementary time windows spaced one pulse period (T) apart, and waves corresponding to those signals are emitted towards remote objects, so as to enable to monitor waves transmitted by those objects upon receiving the emitted waves. The emission of those waves is periodically prevented, according to at least one inhibition period (3T, 5T) proportional to the pulse period and equal to at least three times that pulse period. Parameters are set, suited to producing measurement information on the objects from the wave monitoring, based on at least part of a frequency content of the transmitted waves to which the pulse and inhibition periods contribute. Applications to lidars, radars, active sonars and ultrasound monitoring.

In an emission process for remote sensing, pulse signals (630) are periodically produced in elementary time windows spaced one pulse period (T) apart, and waves corresponding to those signals are emitted towards remote objects, so as to enable to monitor waves transmitted by those objects upon receiving the emitted waves. The emission of those waves is periodically prevented, according to at least one inhibition period (3T, 5T) proportional to the pulse period and equal to at least three times that pulse period. Parameters are set, suited to producing measurement information on the objects from the wave monitoring, based on at least part of a frequency content of the transmitted waves to which the pulse and inhibition periods contribute. Applications to lidars, radars, active sonars and ultrasound monitoring.

A controller for a FMCW radar system configured to: provide for emission by the FMCW radar system of a plurality of consecutive frequency modulated detection signals for detection and ranging, each of the frequency modulated detection signals varying between an initial frequency and a final frequency over a period of time extending from a start time to an end time; wherein at least one of said consecutive frequency modulated detection signals is provided with an offset to one or more of; the start time of the detection signal relative to a predetermined start time schedule; the end time of the detection signal relative to a predetermined end time schedule; the initial frequency of the detection signal relative to a predetermined initial frequency schedule; and the final frequency of the detection signal relative to a predetermined final frequency schedule;
the offset based on a random value.

Method and device for radar transmission and reception by dynamic change of polarization notably for the implementation of interleaved radar modes are provided. A radar transmission-reception method and a device for implementing this method, the method alternatively implementing two modes of operation, a short range mode exploiting short pulses and a long range mode exploiting modulated long pulses, the method consisting, for each mode, in: producing two synchronous radiofrequency (RF) transmission signals having between them a phase-shift of controllable given value; radiating two radiofrequency waves, each corresponding to one of the transmission RF signals produced, by means of two colocated radiating sources each having a given polarization axis; handling the reception of the backscattered radiofrequency signals picked up by each of the radiating sources, and delivering two radiofrequency (RF) reception signals each corresponding to a radiofrequency signal picked up by one of the radiating sources, a phase-shift being applied between the two signals delivered, being able to be determined as being equal to .

A radar control device is provided, which includes a signal generating module configured to generate a transmission pattern signal comprised of at least one kind of pulse signal that is set among pulse signals including first and second pulse signals, a transmitter configured to externally transmit the transmission pattern signal via a radar antenna, a detector configured to detect transmission power of each pulse signal included in the transmission pattern signal, and a processing circuit configured to control, when the transmission pattern signal includes the second pulse signal, the transmission power of the transmission pattern signal by using a control value calculated based on the transmission power of the second pulse signal, and control, when the transmission pattern signal consists of the first signal, the transmission power of the first pulse signal by using a control value previously used for controlling the transmission power of the second pulse signal.

A radar control device is provided, which includes a signal generating module configured to generate a transmission pattern signal comprised of at least one kind of pulse signal that is set among pulse signals including first and second pulse signals, a transmitter configured to externally transmit the transmission pattern signal via a radar antenna, a detector configured to detect transmission power of each pulse signal included in the transmission pattern signal, and a processing circuit configured to control, when the transmission pattern signal includes the second pulse signal, the transmission power of the transmission pattern signal by using a control value calculated based on the transmission power of the second pulse signal, and control, when the transmission pattern signal consists of the first signal, the transmission power of the first pulse signal by using a control value previously used for controlling the transmission power of the second pulse signal.

In an ultra-wideband (UWB) communication system, methods are disclosed for transmitting packets in multiple portions, each having a different pulse repetition frequency (PRF). Methods are also disclosed for transmitting packets dis-continuously.