Bit Encoding

NI-RFmx Waveform Creator helps you in encoding the bit sequence (data source) before modulating. There are five types of encoding are available.

Differential

Let b_n be the binary input sequence at time n and d_n be the binary output sequence at time n after encoding. d_n is then defined as:

where

is an EXCLUSIVE OR operation.

GSM Differential

Let b_n be the binary input sequence at time n and d_n be the binary output sequence at time n after encoding. d_n is then defined as

where

is an EXCLUSIVE OR operation and

is the NOT of x.

Inverted

Let b_n be the binary input sequence at time n and be d_n the binary output sequence at time n after encoding. d_n is then defined as

where

is the NOT of x.

NRZ Inverted (Non return to zero inverted)

Let b_n be the binary input sequence at time n and d_n be the binary output sequence at time n after encoding. d_n is then defined as

where

is an EXCLUSIVE OR operation and

is the NOT of x.

Manchester

Let b_n be the binary input sequence of length n and d_k+1 be the binary output sequence of length k+1 after encoding. d_k and d_k+1 are then defined as:

d_k = b_n

where k = 2_n and

is the NOT of x.