Is radio path chanell respone symmetry ?

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SUMMARY

The discussion centers on the principle of reciprocity in radio communication, specifically regarding channel response symmetry between transmitter (T) and receiver (R). It is established that under ideal conditions, the channel response from T to R will mirror that from R to T, allowing for the same signal level to be received. The conversation also highlights the impact of knife diffraction effects, particularly in relation to the Fresnel zone, which plays a significant role in radio frequency (RF) links.

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  • Knowledge of the reciprocity theorem in signal transmission
  • Familiarity with diffraction effects in RF propagation
  • Concept of the Fresnel zone in wave propagation
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motish5
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Hello
assume I sample signal between Transmiter to Reciver T->R
Is the chanell respone would be the same to R->T also?

especially I wonder about knife difraction effect ( Fresnel zone )
 
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You seem to be referring to the principle of 'Reciprocity' which says that a receiver and transmitter can be transposed in a link, all things being equal, and the same signal level will be received.
I think it holds good as long as you can be sure that the conditions are strictly adhered to. The diffraction situation would also hold - because every RF link involves diffraction. Sometimes it's more obvious than at other times.
 

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