Final answer:
To achieve perfect communication over noisy channels, techniques such as error-correcting codes, forward error correction, and signal processing techniques can be used.
Step-by-step explanation:
In order to achieve perfect communication over noisy channels, we can use various techniques:
- Error-correcting codes: These codes are designed to add redundancy to the encoded message allowing the receiver to correct errors caused by noise.
- Forward error correction: This technique involves adding extra data to the message which allows the receiver to detect and correct errors without the need for retransmission.
- Signal processing techniques: Signal processing algorithms can be used to filter out the noise from the received signal and improve the accuracy of communication.