dopsteeringvec

Doppler steering vector

Syntax

DSTV = dopsteeringvec(dopplerfreq,numpulses)
DSTV = dopsteeringvec(dopplerfreq,numpulses,PRF)

Description

DSTV = dopsteeringvec(dopplerfreq,numpulses) returns the N-by-1 temporal (time-domain) Doppler steering vector for a target at a normalized Doppler frequency of dopplerfreq in hertz. The pulse repetition frequency is assumed to be 1 Hz.

DSTV = dopsteeringvec(dopplerfreq,numpulses,PRF) specifies the pulse repetition frequency, PRF.

Input Arguments

dopplerfreq

The Doppler frequency in hertz. The normalized Doppler frequency is the Doppler frequency divided by the pulse repetition frequency.

numpulses

The number of pulses. The time-domain Doppler steering vector consists of numpulses samples taken at intervals of 1/PRF (slow-time samples).

PRF

Pulse repetition frequency in hertz. The time-domain Doppler steering vector consists of numpulses samples taken at intervals of 1/PRF (slow-time samples). The normalized Doppler frequency is the Doppler frequency divided by the pulse repetition frequency.

Output Arguments

DSTV

Temporal (time-domain) Doppler steering vector. DSTV is an N-by-1 column vector where N is the number of pulses, numpulses.

Examples

Calculate the steering vector corresponding to a Doppler frequency of 200 Hz, assuming there are 10 pulses and the PRF is 1 kHz.

dstv = dopsteeringvec(200,10,1000);

More About

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Temporal Doppler Steering Vector

The temporal (time-domain) steering vector corresponding to a point scatterer is:

ej2πfdTpn

where n=0,1,2, ..., N-1 are slow-time samples (one sample from each pulse), fd is the Doppler frequency, and Tp is the pulse repetition interval. The product of the Doppler frequency and the pulse repetition interval is the normalized Doppler frequency.

References

[1] Melvin, W. L. "A STAP Overview," IEEE® Aerospace and Electronic Systems Magazine, Vol. 19, Number 1, 2004, pp. 19–35.

[2] Richards, M. A. Fundamentals of Radar Signal Processing. New York: McGraw-Hill, 2005.

See Also

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