Mstar Semiconductor, Inc.

Integrated Device Technology, Inc.

Jonathan Gowing

Thomas Gregory Mckay

Stephen Allott

Cyril Valadon

A pulsed radar system is presented that includes a sliding window and DC offset. A method of pulsed DC radar operation, comprising an operation state, the operation state including initializing parameters for a current integration window; providing timing for the current integration window to an integrating filter based from a transmit pulse; providing a DC offset associated with the current integration window; and incrementing the current integration window to the next integration window to be timed from a next transmit pulse.

Sliding window and DC offset correction technique for pulse doppler radar systems

One aspect of the present invention includes a radio frequency (RF) receiver having a first mixer and a second mixer. The first mixer may be an I-mixer and the second mixer a Q-mixer for downconverting the received RF signal. An impedance circuit is disposed between the first mixer and the second mixer to decouple the channels. In another aspect of present invention, the RF receiver includes a digital filter having at least one complex coefficient. The digital filter exhibits asymmetrical frequency response, and may be used to compensate the asymmetrical frequency response of another filter in the RF receiver.

Multimode receiver with complex filter

One aspect of the present invention includes an RF including a first mixer receiving an RF signal. A second mixer also receivers the RF signal. A resonant circuit couples to a common input of the first mixer and the second mixer. A second polyphase reactive circuit coupled to an output of the second mixer. In one embodiment, a direct current circuit coupled to the output of the first mixer, injecting direct current into the system. The resonant circuit is set at a resonance frequency such that a voltage across the second polyphase reactive circuit is a predetermined voltage.

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Santa Cruz, CA, United States of America

Jonathan Gowing