Imagine to have a bitstream in baseband encoded using a unipolar NRZ where the bit 0 is encoded with 0 Volts and the Bit 1 with a generic value V.
Assuming that the channel is affected by AWGN noise with a generic value , are there any other types of encoding that permits to keep the exact same BER but with lower energy per bit ?

Question

Imagine to have a bitstream in  baseband  encoded using a  unipolar NRZ  where the bit 0 is encoded with 0 Volts and the Bit 1 with a generic value V.  
 Assuming that the channel is affected by AWGN noise with a generic value   , are there any other types of encoding that permits to keep  the exact same  BER but with lower energy per bit ?

Answer

Using a bipolar encoding between    and

Answer

Use a bipolar encoding between -V and V

Answer

Using a unipolar encoding between 0 and

Answer

No other possibilities are known

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Imagine to have a bitstream in baseband encoded using a unipolar NRZ where t...

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