Digital Processing of Synthetic Aperture Radar Data: Algorithms and Implementation [With CDROM] (Artech House Remote Sensing Library) by Ian G. Cumming;Frank H. Wong

Author:Ian G. Cumming;Frank H. Wong [Ian G. Cumming;Frank H. Wong]
Language: eng
Format: epub
Published: 2009-04-21T08:52:00+00:00

sp(T) = exp{j 27r Kr (T - Ta) OT} (7.3)

which depends upon Kr, and contains a shift parameter, OT. Multiplying the radar signal, so(-r), by sp(r) results in the scaled signal

By comparing the (T - Ta)2 phase factor of (7.1) with the (T - Ta + OT)2 factor of (7.4), it is seen that the position of zero frequency has been shifted by AT time units to the left.2 This has been achieved by applying a frequency shift of

,fsc = Kr OT (7.5)

to the signal via (7.3). This frequency shift is called the "scaling function frequency." Besides the shift, there is a residual phase given by the last exponential term of (7.4), which can be removed by a subsequent phase compensation.

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