Sampling-Rate Conversion: Frequency-Domain Interpretation of Downsampling

[@ROHANKUMAR-ve5nr]

Brilliant work sir

[@adhit528]

very nice work

[@piyushsinha3344]

Frequency is scaled by M(2) ,SO it sud be( pie/2 )and not( pie*2)??

[@lovecatxo2471]

thank u

[@liupengwu5205]

"Scaling of frequnecy axis by a fator of M" is not true for down sampling I think.
When the sentence is true, it is not downsampling , it only change some samples as zero.
Downsampling will no change bandwidth if no aliasing happening.

[@SigProcessing]

I am afraid that's not true. Sampling-rate conversion is always going to have an effect on your discrete-time spectrum.