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 | |
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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. | |
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enum | vcolor { WHITE, GREY, BLACK } |
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sync_block (void) | |
sync_block (const std::string &name, gr::io_signature::sptr input_signature, gr::io_signature::sptr output_signature) | |
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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 |
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.
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static |
Make a new instance of gr::dtv::atsc_fpll.
param rate Sample rate of incoming stream