A radar pulse generator includes a multiplexer, a polyphase synthesizer, a first signal channel and a second signal channel. The multiplexer has a baseband radar pulse input, a multiplexer control input, a first channel output and a second channel output. The baseband radar pulse input signal is a single channel baseband radar pulse signal. The multiplexer control input signal selects one of the group consisting of the first channel output and the second channel output. The polyphase synthesizer synthesizes the first channel output signal, synthesizes the second channel output signal and outputs a desired radar pulse signal based on the synthesized first channel output signal and the synthesized second channel output signal. The first signal channel provides the first channel output signal from the first channel output to the polyphase synthesizer. The second signal channel provides the second channel output signal from the second channel output to the polyphase synthesizer.

A radar system transmits pulses towards a target and receives pulses reflected back therefrom. Based on samples (of the received pulses) corresponding to a CPI, a first 2D matrix having a slow-time index and a fast-time index is generated. A slow-time FFT is performed to convert the slow-time index to a Doppler bin index to produce a second 2D matrix having the Doppler bin index and the fast-time index. Thereafter, a 1D interpolation is performed along the Doppler bin index to produce a third 2D matrix having a Velocity bin index and the fast-time index. Thereafter, a fast-time FFT is performed to convert the fast-time index to a Range bin index to produce a fourth 2D matrix having the Velocity bin index and a Range bin index. A distance to and a velocity of a target is determined based on the fourth 2D matrix.

A radar system transmits pulses towards a target and receives pulses reflected back therefrom. Based on samples (of the received pulses) corresponding to a CPI, a first 2D matrix having a slow-time index and a fast-time index is generated. A slow-time FFT is performed to convert the slow-time index to a Doppler bin index to produce a second 2D matrix having the Doppler bin index and the fast-time index. Thereafter, a 1D interpolation is performed along the Doppler bin index to produce a third 2D matrix having a Velocity bin index and the fast-time index. Thereafter, a fast-time FFT is performed to convert the fast-time index to a Range bin index to produce a fourth 2D matrix having the Velocity bin index and a Range bin index. A distance to and a velocity of a target is determined based on the fourth 2D matrix.

A guided wave radar level gauge for determining a fill level of a product contained in a tank comprising: a transceiver configured to provide a transmit signal, Tx-signal, in the form of a pulse train, having a controllable pulse repetition frequency f.sub.Tx, and to receive a reflected signal resulting from a reflection of the transmit signal at a surface of the product; a probe connected to the transceiver and configured to propagate the Tx-signal towards the surface and to return the reflected signal to the transceiver, the probe having a known length; and control circuitry configured to determine the fill level based on the received reflected signal, wherein the control circuitry is further configured to set the pulse repetition frequency based on the length of the probe.

A guided wave radar level gauge for determining a fill level of a product contained in a tank comprising: a transceiver configured to provide a transmit signal, Tx-signal, in the form of a pulse train, having a controllable pulse repetition frequency f.sub.Tx, and to receive a reflected signal resulting from a reflection of the transmit signal at a surface of the product; a probe connected to the transceiver and configured to propagate the Tx-signal towards the surface and to return the reflected signal to the transceiver, the probe having a known length; and control circuitry configured to determine the fill level based on the received reflected signal, wherein the control circuitry is further configured to set the pulse repetition frequency based on the length of the probe.

A system and a method that enable two or more dispersed platforms to simultaneously use respective frequency-modulated continuous-wave radar systems in a typical radar application such as synthetic-aperture radar for terrain mapping, moving-target indicator radar to track targets on the ground and air-to-air tracking of other aircraft. The systems use the same RF spectrum in their operation and also communicate through their respective radar systems while simultaneously reducing their interplatform interference through the use of both filters and coded waveforms.

A system and a method that enable two or more dispersed platforms to simultaneously use respective frequency-modulated continuous-wave radar systems in a typical radar application such as synthetic-aperture radar for terrain mapping, moving-target indicator radar to track targets on the ground and air-to-air tracking of other aircraft. The systems use the same RF spectrum in their operation and also communicate through their respective radar systems while simultaneously reducing their interplatform interference through the use of both filters and coded waveforms.

A radar detection system that estimates the received pulse frequency of a pulse in a received radar signal using a signal transmit frequency or one that uses frequency agility during a pulse duration. The radar detector system may include a radar detector that receives the radar signal from an antenna or antenna array. The receiver may be channelized, and each channel path may include Gaussian bandpass filter(s) centered at a different frequencies. The system includes an extended range radar detector that receives the signal in the channels and processing logic that processes the detected channel signals to identify the pulse frequency of emitters with or without frequency agility during a pulse duration. The frequency estimates of the pulse are based on calibrated amplitude differences in adjacent channels.

Techniques and apparatuses are described that enable radar attenuation mitigation. To improve radar performance, characteristics of an attenuator and/or properties of a radar signal are determined to reduce attenuation of the radar signal due to the attenuator and enable a radar system to detect a target located on an opposite side of the attenuator. These techniques are beneficial in situations in which the attenuator is unavoidably located between the radar system and a target, either due to integration within other electronic devices or due to an operating environment. These techniques save power and cost by reducing the attenuation without increasing transmit power or changing material properties of the attenuator.

Techniques and apparatuses are described that enable radar attenuation mitigation. To improve radar performance, characteristics of an attenuator and/or properties of a radar signal are determined to reduce attenuation of the radar signal due to the attenuator and enable a radar system to detect a target located on an opposite side of the attenuator. These techniques are beneficial in situations in which the attenuator is unavoidably located between the radar system and a target, either due to integration within other electronic devices or due to an operating environment. These techniques save power and cost by reducing the attenuation without increasing transmit power or changing material properties of the attenuator.