Re: range accuracy

[EMAIL PROTECTED] wrote:
> Does anyone have an idea on the corelation between range accuracy and
> signal bandwidth? Basically I understand broader bandwidth can result
> in better range accuracy. However is there any specific equations to
> estimate range accuracy depending on signal bandwidth? Or does the
> corelation between range accuray and signal bandwidth depned on radar
> principle, such as pulse radar or FMCW?

There are two different, but related concepts here: resolution and accuracy.

Range resolution (the ability to distinguish distinct scatterers) is 
roughly:

    delta_range = speed_of_light / (2 * waveform_bandwidth).

So a 1 GHz waveform has a theoretical 15 centimeter range resolution. Of 
course this is an ideal value. With tapers for range sidelobe reduction, 
this value will increase.

Range accuracy is given by:

    sigma = speed_of_light / [ 4 * waveform_bandwith * sqrt( SNR ) ].

These equations are valid for different waveform modulation schemes 
(linear FM, PRN, etc.). You can find more details in any decent radar 
textbook.

Good luck,
OUP