gr::digital::additive_scrambler_bb Class Reference

Scramble an input stream using an LFSR. More...

#include <additive_scrambler_bb.h>

Inheritance diagram for gr::digital::additive_scrambler_bb:

List of all members.

Public Types
typedef boost::shared_ptr < additive_scrambler_bb >	sptr
Public Member Functions
virtual int	mask () const =0
virtual int	seed () const =0
virtual int	len () const =0
virtual int	count () const =0
Static Public Member Functions
static sptr	make (int mask, int seed, int len, int count=0)
	Create additive scrambler.

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Detailed Description

Scramble an input stream using an LFSR.

This block works on the LSB only of the input data stream, i.e., on an "unpacked binary" stream, and produces the same format on its output.

The scrambler works by XORing the incoming bit stream by the output of the LFSR. Optionally, after 'count' bits have been processed, the shift register is reset to the seed value. This allows processing fixed length vectors of samples.

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Member Typedef Documentation

typedef boost::shared_ptr<additive_scrambler_bb> gr::digital::additive_scrambler_bb::sptr

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Member Function Documentation

virtual int gr::digital::additive_scrambler_bb::count

(

)

const [pure virtual]

virtual int gr::digital::additive_scrambler_bb::len

(

)

const [pure virtual]

static sptr gr::digital::additive_scrambler_bb::make	(	int	mask,
		int	seed,
		int	len,
		int	count = 0
	)		[static]

Create additive scrambler.

Parameters:

mask	Polynomial mask for LFSR
seed	Initial shift register contents
len	Shift register length
count	Number of bits after which shift register is reset, 0=never

virtual int gr::digital::additive_scrambler_bb::mask

(

)

const [pure virtual]

virtual int gr::digital::additive_scrambler_bb::seed

(

)

const [pure virtual]

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The documentation for this class was generated from the following file:

• additive_scrambler_bb.h