GNU Radio Manual and C++ API Reference  3.7.5
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gr::dtv::atsc_fpll Class Reference

ATSC Receiver FPLL. More...

#include </build/gnuradio-O4UjFN/gnuradio-3.7.5/gr-dtv/include/gnuradio/dtv/atsc_fpll.h>

Public Types

typedef boost::shared_ptr
< atsc_fpll
sptr

Static Public Member Functions

static sptr make (float rate)
 Make a new instance of gr::dtv::atsc_fpll.

Additional Inherited Members

- Public Member Functions inherited from gr::sync_block
virtual int work (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)=0
 just like gr::block::general_work, only this arranges to call consume_each for you
void forecast (int noutput_items, gr_vector_int &ninput_items_required)
 Estimate input requirements given output request.
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
int fixed_rate_ninput_to_noutput (int ninput)
 Given ninput samples, return number of output samples that will be produced. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don't need to override this.
int fixed_rate_noutput_to_ninput (int noutput)
 Given noutput samples, return number of input samples required to produce noutput. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don't need to override this.
- Protected Types inherited from gr::basic_block
enum  vcolor { WHITE, GREY, BLACK }
- Protected Member Functions inherited from gr::sync_block
 sync_block (void)
 sync_block (const std::string &name, gr::io_signature::sptr input_signature, gr::io_signature::sptr output_signature)
- Protected Attributes inherited from gr::block
std::vector< long > d_max_output_buffer
std::vector< long > d_min_output_buffer
gr::thread::mutex d_setlock
gr::logger_ptr d_logger
gr::logger_ptr d_debug_logger

Detailed Description

ATSC Receiver FPLL.

This block is takes in a complex I/Q baseband stream from the receive filter and outputs the 8-level symbol stream.

It does this by first locally generating a pilot tone and complex mixing with the input signal. This results in the pilot tone shifting to DC and places the signal in the upper sideband.

As no information is encoded in the phase of the waveform, the Q channel is then discarded, producing a real signal with the lower sideband restored.

The 8-level symbol stream still has a DC offset, and still requires symbol timing recovery.

Member Typedef Documentation

Member Function Documentation

static sptr gr::dtv::atsc_fpll::make ( float  rate)
static

Make a new instance of gr::dtv::atsc_fpll.

param rate Sample rate of incoming stream


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