gr::filter::pfb_channelizer_ccf_impl Class Reference

#include <pfb_channelizer_ccf_impl.h>

Inheritance diagram for gr::filter::pfb_channelizer_ccf_impl:

List of all members.

Public Member Functions
	pfb_channelizer_ccf_impl (unsigned int nfilts, const std::vector< float > &taps, float oversample_rate)
	~pfb_channelizer_ccf_impl ()
void	set_taps (const std::vector< float > &taps)
void	print_taps ()
std::vector< std::vector< float > >	taps () const
void	set_channel_map (const std::vector< int > &map)
std::vector< int >	channel_map () const
int	general_work (int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
	compute output items from input items

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Constructor & Destructor Documentation

gr::filter::pfb_channelizer_ccf_impl::pfb_channelizer_ccf_impl	(	unsigned int	nfilts,
		const std::vector< float > &	taps,
		float	oversample_rate
	)

gr::filter::pfb_channelizer_ccf_impl::~pfb_channelizer_ccf_impl

(

)

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Member Function Documentation

std::vector<int> gr::filter::pfb_channelizer_ccf_impl::channel_map

(

)

const [virtual]

Gets the current channel map.

Implements gr::filter::pfb_channelizer_ccf.

int gr::filter::pfb_channelizer_ccf_impl::general_work	(	int	noutput_items,
		gr_vector_int &	ninput_items,
		gr_vector_const_void_star &	input_items,
		gr_vector_void_star &	output_items
	)		[virtual]

compute output items from input items

Parameters:

noutput_items	number of output items to write on each output stream
ninput_items	number of input items available on each input stream
input_items	vector of pointers to the input items, one entry per input stream
output_items	vector of pointers to the output items, one entry per output stream

Returns:

number of items actually written to each output stream, or -1 on EOF. It is OK to return a value less than noutput_items. -1 <= return value <= noutput_items

general_work must call consume or consume_each to indicate how many items were consumed on each input stream.

Reimplemented from gr_block.

void gr::filter::pfb_channelizer_ccf_impl::print_taps

(

)

[virtual]

Print all of the filterbank taps to screen.

Implements gr::filter::pfb_channelizer_ccf.

void gr::filter::pfb_channelizer_ccf_impl::set_channel_map

(

const std::vector< int > &

map

)

[virtual]

Set the channel map. Channels are numbers as:

N/2+1 | ... | N-1 | 0 | 1 | 2 | ... | N/2 <------------------- 0 --------------------> freq

So output stream 0 comes from channel 0, etc. Setting a new channel map allows the user to specify which channel in frequency he/she wants to got to which output stream.

The map should have the same number of elements as the number of output connections from the block. The minimum value of the map is 0 (for the 0th channel) and the maximum number is N-1 where N is the number of channels.

We specify M as the number of output connections made where M <= N, so only M out of N channels are driven to an output stream. The number of items in the channel map should be at least M long. If there are more channels specified, any value in the map over M-1 will be ignored. If the size of the map is less than M the behavior is unknown (we don't wish to check every entry into the work function).

This means that if the channelizer is splitting the signal up into N channels but only M channels are specified in the map (where M <= N), then M output streams must be connected and the map and the channel numbers used must be less than N-1. Output channel number can be reused, too. By default, the map is [0...M-1] with M = N.

Implements gr::filter::pfb_channelizer_ccf.

void gr::filter::pfb_channelizer_ccf_impl::set_taps

(

const std::vector< float > &

taps

)

[virtual]

Resets the filterbank's filter taps with the new prototype filter

Parameters:

taps	(vector/list of floats) The prototype filter to populate the filterbank.

Implements gr::filter::pfb_channelizer_ccf.

std::vector<std::vector<float> > gr::filter::pfb_channelizer_ccf_impl::taps

(

)

const [virtual]

Return a vector<vector<>> of the filterbank taps

Implements gr::filter::pfb_channelizer_ccf.

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

• pfb_channelizer_ccf_impl.h