GNU Radio 3.5.3.2 C++ API
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Carrier tracking PLL for QPSKinput: complex; output: complex
The Costas loop can have two output streams: stream 1 is the baseband I and Q; stream 2 is the normalized frequency of the loop.
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#include <digital_costas_loop_cc.h>
Public Member Functions | |
int | work (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) |
just like gr_block::general_work, only this arranges to call consume_each for you | |
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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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virtual | ~gr_block () |
unsigned | history () const |
void | set_history (unsigned history) |
bool | fixed_rate () const |
Return true if this block has a fixed input to output rate. | |
virtual bool | start () |
Called to enable drivers, etc for i/o devices. | |
virtual bool | stop () |
Called to disable drivers, etc for i/o devices. | |
void | set_output_multiple (int multiple) |
Constrain the noutput_items argument passed to forecast and general_work. | |
int | output_multiple () const |
bool | output_multiple_set () const |
void | set_alignment (int multiple) |
Constrains buffers to work on a set item alignment (for SIMD) | |
int | alignment () const |
void | set_unaligned (int na) |
int | unaligned () const |
void | set_is_unaligned (bool u) |
bool | is_unaligned () const |
void | consume (int which_input, int how_many_items) |
Tell the scheduler how_many_items of input stream which_input were consumed. | |
void | consume_each (int how_many_items) |
Tell the scheduler how_many_items were consumed on each input stream. | |
void | produce (int which_output, int how_many_items) |
Tell the scheduler how_many_items were produced on output stream which_output . | |
void | set_relative_rate (double relative_rate) |
Set the approximate output rate / input rate. | |
double | relative_rate () const |
return the approximate output rate / input rate | |
uint64_t | nitems_read (unsigned int which_input) |
Return the number of items read on input stream which_input. | |
uint64_t | nitems_written (unsigned int which_output) |
Return the number of items written on output stream which_output. | |
tag_propagation_policy_t | tag_propagation_policy () |
Asks for the policy used by the scheduler to moved tags downstream. | |
void | set_tag_propagation_policy (tag_propagation_policy_t p) |
Set the policy by the scheduler to determine how tags are moved downstream. | |
gr_block_detail_sptr | detail () const |
void | set_detail (gr_block_detail_sptr detail) |
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virtual | ~gr_basic_block () |
long | unique_id () const |
std::string | name () const |
gr_io_signature_sptr | input_signature () const |
gr_io_signature_sptr | output_signature () const |
gr_basic_block_sptr | to_basic_block () |
virtual bool | check_topology (int ninputs, int noutputs) |
Confirm that ninputs and noutputs is an acceptable combination. | |
template<typename T > | |
void | set_msg_handler (T msg_handler) |
Set the callback that is fired when messages are available. | |
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gr_msg_accepter () | |
~gr_msg_accepter () | |
void | post (pmt::pmt_t msg) |
send msg to msg_accepter | |
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msg_accepter () | |
virtual | ~msg_accepter () |
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gri_control_loop (float loop_bw, float max_freq, float min_freq) | |
virtual | ~gri_control_loop () |
void | update_gains () |
update the system gains from the loop bandwidth and damping factor | |
void | advance_loop (float error) |
update the system gains from the loop bandwidth and damping factor | |
void | phase_wrap () |
Keep the phase between -2pi and 2pi. | |
void | frequency_limit () |
Keep the frequency between d_min_freq and d_max_freq. | |
void | set_loop_bandwidth (float bw) |
Set the loop bandwidth. | |
void | set_damping_factor (float df) |
Set the loop damping factor. | |
void | set_alpha (float alpha) |
Set the loop gain alpha. | |
void | set_beta (float beta) |
Set the loop gain beta. | |
void | set_frequency (float freq) |
Set the Costas loop's frequency. | |
void | set_phase (float phase) |
Set the Costas loop's phase. | |
float | get_loop_bandwidth () const |
Returns the loop bandwidth. | |
float | get_damping_factor () const |
Returns the loop damping factor. | |
float | get_alpha () const |
Returns the loop gain alpha. | |
float | get_beta () const |
Returns the loop gain beta. | |
float | get_frequency () const |
Get the Costas loop's frequency estimate. | |
float | get_phase () const |
Get the Costas loop's phase estimate. |
Friends | |
DIGITAL_API digital_costas_loop_cc_sptr | digital_make_costas_loop_cc (float loop_bw, int order) throw (std::invalid_argument) |
Additional Inherited Members | |
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enum | { WORK_CALLED_PRODUCE = -2, WORK_DONE = -1 } |
Magic return values from general_work. More... | |
enum | tag_propagation_policy_t { TPP_DONT = 0, TPP_ALL_TO_ALL = 1, TPP_ONE_TO_ONE = 2 } |
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enum | vcolor { WHITE, GREY, BLACK } |
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gr_sync_block (void) | |
gr_sync_block (const std::string &name, gr_io_signature_sptr input_signature, gr_io_signature_sptr output_signature) | |
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std::string | d_name |
gr_io_signature_sptr | d_input_signature |
gr_io_signature_sptr | d_output_signature |
long | d_unique_id |
vcolor | d_color |
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float | d_phase |
float | d_freq |
float | d_max_freq |
float | d_min_freq |
float | d_damping |
float | d_loop_bw |
float | d_alpha |
float | d_beta |
Carrier tracking PLL for QPSK
input: complex; output: complex
The Costas loop can have two output streams: stream 1 is the baseband I and Q; stream 2 is the normalized frequency of the loop.
order
must be 2, 4, or 8.
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virtual |
just like gr_block::general_work, only this arranges to call consume_each for you
The user must override work to define the signal processing code
Implements gr_sync_block.
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friend |