Filtering Methods
The RF receiver is subjected to noise interference and attenuation at 434 MHz. Amplification of the signal is not implemented because it is too costly in terms of money and battery power. Noise is filtered via parity check and immediately discarded in order to optimize processing speed. There will also be some noise on the analog output of the ultrasonic sensor. This will be rendered less significant by taking an average of 10 analog output values per transmit update.