digital_packet_sink Class Reference
process received bits looking for packet sync, header, and process bits into packet More...
#include <digital_packet_sink.h>
Public Member Functions | |
| ~digital_packet_sink () | |
| 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 | |
| bool | carrier_sensed () const |
| return true if we detect carrier | |
Protected Member Functions | |
| digital_packet_sink (const std::vector< unsigned char > &sync_vector, gr_msg_queue_sptr target_queue, int threshold) | |
| void | enter_search () |
| void | enter_have_sync () |
| void | enter_have_header (int payload_len) |
| int | slice (float x) |
| bool | header_ok () |
| int | header_payload_len () |
Friends | |
| DIGITAL_API digital_packet_sink_sptr | digital_make_packet_sink (const std::vector< unsigned char > &sync_vector, gr_msg_queue_sptr target_queue, int threshold) |
Detailed Description
process received bits looking for packet sync, header, and process bits into packet
input: stream of symbols to be sliced.
output: none. Pushes assembled packet into target queue
The packet sink takes in a stream of binary symbols that are sliced around 0. The bits are then checked for the sync_vector to determine find and decode the packet. It then expects a fixed length header of 2 16-bit shorts containing the payload length, followed by the payload. If the 2 16-bit shorts are not identical, this packet is ignored. Better algs are welcome.
This block is not very useful anymore as it only works with 2-level modulations such as BPSK or GMSK. The block can generally be replaced with a correlate access code and frame sink blocks.
Constructor & Destructor Documentation
| digital_packet_sink::digital_packet_sink | ( | const std::vector< unsigned char > & | sync_vector, |
| gr_msg_queue_sptr | target_queue, | ||
| int | threshold | ||
| ) | [protected] |
Build a packet sink block.
- Parameters:
-
sync_vector The synchronization vector as a vector of 1's and 0's. target_queue The message queue that packets are sent to. threshold Number of bits that can be incorrect in the sync_vector.
| digital_packet_sink::~digital_packet_sink | ( | ) |
Member Function Documentation
| bool digital_packet_sink::carrier_sensed | ( | ) | const [inline] |
return true if we detect carrier
| void digital_packet_sink::enter_have_header | ( | int | payload_len | ) | [protected] |
| void digital_packet_sink::enter_have_sync | ( | ) | [protected] |
| void digital_packet_sink::enter_search | ( | ) | [protected] |
| bool digital_packet_sink::header_ok | ( | ) | [inline, protected] |
| int digital_packet_sink::header_payload_len | ( | ) | [inline, protected] |
| int digital_packet_sink::slice | ( | float | x | ) | [inline, protected] |
| int digital_packet_sink::work | ( | int | noutput_items, |
| gr_vector_const_void_star & | input_items, | ||
| gr_vector_void_star & | output_items | ||
| ) | [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.
Friends And Related Function Documentation
| DIGITAL_API digital_packet_sink_sptr digital_make_packet_sink | ( | const std::vector< unsigned char > & | sync_vector, |
| gr_msg_queue_sptr | target_queue, | ||
| int | threshold | ||
| ) | [friend] |
The documentation for this class was generated from the following file:
