Analog Devices International Unlimited Company

Vinoth Kumar

Satishchandra G Rao

Carroll Clifton Speir

Corey Petersen

Gerard E Taylor

Kaustubh Pradeepkumar Mundhada

Bhanu Pande

Sajkapoor P K

Madhusudan Rathi

Delay calibration for digital signal chains of SFCW systems is disclosed. An example calibration method includes receiving a burst with a test pulse, the burst having a duration of L clock cycles; receiving a trigger indicative of a time when the burst was transmitted; generating a digital signal indicative of the received burst; for each of L clock cycles, computing a moving average of a subset of digital samples and an amplitude for each average; identifying one moving average for which the computed amplitude is closest to an expected amplitude; identifying the clock cycle of the identified moving average; and updating at least one delay to be applied in digital signal processing of received bursts based on a difference between the trigger and the identified clock cycle. The delay may be used for selecting digital samples of the received signal that contain valid data for performing further data processing.

Delay calibration for a stepped frequency continuous wave digital signal chain

A sample rate converter ('SRC') for implementing a rate conversion L/M is described wherein data is input to the SRC at an input rate ('F') and output from the SRC at an output rate (&#x201c;F&#x201d;) equal to F*L/M. The SRC includes a low pass filter (&#x201c;LPF&#x201d;) including P multiply-add instances, wherein P is a parallelization factor of the SRC; an input formatter for arranging samples received at the SRC in accordance with the rate conversion L/M and providing P*Tinput samples to the filter at a given time, wherein Tis a number of taps per phase of the LPF; and a coefficient bank for storing a plurality of coefficients and for providing P*Tof the coefficients to the LPF at a given time.

Techniques for input formatting and coefficient selection for sample rate converter in parallel implementation scheme

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Trichy, India

Vinoth Kumar