Then u have to use RF encoder and decoder because u need a coded transmittion to do a specific task…
for example if you transmitt a raw signal of rf that will drive your robot in forward position…. and now if u want to drive robot in reverse position then what will you do if you have no encoder??? !!!
so you have to use encoder minimum 4-bit rf encoder that has 2^4 = 16 rf chanels you can use each chanel for each function…..
in case of robot you need four operations…
1. Move forward
2. Move Backward
3. Move Right
4. Move Left
these four can be achieved by using four bit encoder…..
Raw RF transmission is not able to achive your goal. u need a reiable communication whose each bit is under your control!!! this can be achived only by using encoders…..