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IWR6843ISK: calculated parameters about short range configuration

Part Number: IWR6843ISK

Hi,

I use iwr6843isk with dca1000, and i set short range configuration in people tracking and counting.

In TI document, it is presented like below.

i don't know how range resolution and maximum range are calculated.

In theoretical case,

1. range resolution : C/2B => (3*10^8) / (2 * 2713.66*10^6) = 5.53(cm)

2. maximum range : FsC/2S => (2.5*10^6 * 3*10^8) / (2 * 53*(10^6/10^-6)) = 7.07(m)

and number of range bin :128 ,  so 128(range bin) * 5.53(range resolution) = 7.07(m) : it is clear in theoretical calculation.

However, maximum range is 6.3m and range resolution is 5.5cm in TI document. but 128*5.5 = 7.07m is not same with 6.3m. 

Why maximum range is 6.3m ? and what range resolution in this case? I want to know calculation process in this case !!

(I received data in complex 1X mode.)