Bit Encoding

NI-RFmx Waveform Creator Help

Edition Date: June 2018

Part Number: 377064C-01

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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 bn be the binary input sequence at time n and dn be the binary output sequence at time n after encoding. dn is then defined as:

where

embim5
is an EXCLUSIVE OR operation.

GSM Differential


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

embim6

where

embim7
is an EXCLUSIVE OR operation and
embim8
is the NOT of x.


Inverted


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

embim9

where

embim10
is the NOT of x.

NRZ Inverted (Non return to zero inverted)


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

where

embim11
is an EXCLUSIVE OR operation and
embim12
is the NOT of x.

Manchester


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

dk = bn

where k = 2n and

embim10
is the NOT of x.

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