GNU Radio 3.7.3 C++ API
gr::digital::cpmmod_bc Class Referenceabstract

Generic CPM modulator. More...

#include <gnuradio/digital/cpmmod_bc.h>

Inheritance diagram for gr::digital::cpmmod_bc:

Public Types

typedef boost::shared_ptr
< cpmmod_bc
sptr
 
- Public Types inherited from gr::hier_block2
typedef basic_block_sptr opaque_self
 typedef for object returned from self(). More...
 

Public Member Functions

virtual std::vector< float > taps () const =0
 Return the phase response FIR taps. More...
 
virtual int type () const =0
 Return the type of CPM modulator. More...
 
virtual float index () const =0
 Return the modulation index of the modulator. More...
 
virtual int samples_per_sym () const =0
 Return the number of samples per symbol. More...
 
virtual int length () const =0
 Return the length of the phase duration (in symbols) More...
 
virtual double beta () const =0
 Return the value of beta for the modulator. More...
 
- Public Member Functions inherited from gr::hier_block2
virtual ~hier_block2 ()
 
opaque_self self ()
 Return an object, representing the current block, which can be passed to connect. More...
 
void connect (basic_block_sptr block)
 Add a stand-alone (possibly hierarchical) block to internal graph. More...
 
void connect (basic_block_sptr src, int src_port, basic_block_sptr dst, int dst_port)
 Add gr-blocks or hierarchical blocks to internal graph and wire together. More...
 
void msg_connect (basic_block_sptr src, pmt::pmt_t srcport, basic_block_sptr dst, pmt::pmt_t dstport)
 Add gr-blocks or hierarchical blocks to internal graph and wire together. More...
 
void msg_connect (basic_block_sptr src, std::string srcport, basic_block_sptr dst, std::string dstport)
 
void msg_disconnect (basic_block_sptr src, pmt::pmt_t srcport, basic_block_sptr dst, pmt::pmt_t dstport)
 
void msg_disconnect (basic_block_sptr src, std::string srcport, basic_block_sptr dst, std::string dstport)
 
void disconnect (basic_block_sptr block)
 Remove a gr-block or hierarchical block from the internal flowgraph. More...
 
void disconnect (basic_block_sptr src, int src_port, basic_block_sptr dst, int dst_port)
 Disconnect a pair of gr-blocks or hierarchical blocks in internal flowgraph. More...
 
void disconnect_all ()
 Disconnect all connections in the internal flowgraph. More...
 
virtual void lock ()
 
virtual void unlock ()
 
flat_flowgraph_sptr flatten () const
 
hier_block2_sptr to_hier_block2 ()
 
bool has_msg_port (pmt::pmt_t which_port)
 
bool message_port_is_hier (pmt::pmt_t port_id)
 
bool message_port_is_hier_in (pmt::pmt_t port_id)
 
bool message_port_is_hier_out (pmt::pmt_t port_id)
 
void message_port_register_hier_in (pmt::pmt_t port_id)
 
void message_port_register_hier_out (pmt::pmt_t port_id)
 
void set_processor_affinity (const std::vector< int > &mask)
 Set the affinity of all blocks in hier_block2 to processor core n. More...
 
void unset_processor_affinity ()
 Remove processor affinity for all blocks in hier_block2. More...
 
std::vector< int > processor_affinity ()
 Get the current processor affinity. More...
 
- Public Member Functions inherited from gr::basic_block
pmt::pmt_t message_subscribers (pmt::pmt_t port)
 
virtual ~basic_block ()
 
long unique_id () const
 
long symbolic_id () const
 
std::string name () const
 
std::string symbol_name () const
 
gr::io_signature::sptr input_signature () const
 
gr::io_signature::sptr output_signature () const
 
basic_block_sptr to_basic_block ()
 
bool alias_set ()
 
std::string alias ()
 
pmt::pmt_t alias_pmt ()
 
void set_block_alias (std::string name)
 
void message_port_register_in (pmt::pmt_t port_id)
 
void message_port_register_out (pmt::pmt_t port_id)
 
void message_port_pub (pmt::pmt_t port_id, pmt::pmt_t msg)
 
void message_port_sub (pmt::pmt_t port_id, pmt::pmt_t target)
 
void message_port_unsub (pmt::pmt_t port_id, pmt::pmt_t target)
 
pmt::pmt_t message_ports_in ()
 Get input message port names. More...
 
pmt::pmt_t message_ports_out ()
 Get output message port names. More...
 
void _post (pmt::pmt_t which_port, pmt::pmt_t msg)
 
bool empty_p (pmt::pmt_t which_port)
 is the queue empty? More...
 
bool empty_p ()
 
bool empty_handled_p (pmt::pmt_t which_port)
 are all msg ports with handlers empty? More...
 
bool empty_handled_p ()
 
size_t nmsgs (pmt::pmt_t which_port)
 How many messages in the queue? More...
 
void insert_tail (pmt::pmt_t which_port, pmt::pmt_t msg)
 
pmt::pmt_t delete_head_nowait (pmt::pmt_t which_port)
 
pmt::pmt_t delete_head_blocking (pmt::pmt_t which_port)
 
msg_queue_t::iterator get_iterator (pmt::pmt_t which_port)
 
void erase_msg (pmt::pmt_t which_port, msg_queue_t::iterator it)
 
virtual void setup_rpc ()
 Set up the RPC registered variables. More...
 
bool is_rpc_set ()
 Ask if this block has been registered to the RPC. More...
 
void rpc_set ()
 When the block is registered with the RPC, set this. More...
 
virtual bool check_topology (int ninputs, int noutputs)
 Confirm that ninputs and noutputs is an acceptable combination. More...
 
template<typename T >
void set_msg_handler (pmt::pmt_t which_port, T msg_handler)
 Set the callback that is fired when messages are available. More...
 
- Public Member Functions inherited from gr::msg_accepter
 msg_accepter ()
 
 ~msg_accepter ()
 
void post (pmt::pmt_t which_port, pmt::pmt_t msg)
 send msg to msg_accepter on port which_port More...
 
- Public Member Functions inherited from gr::messages::msg_accepter
 msg_accepter ()
 

Static Public Member Functions

static sptr make (analog::cpm::cpm_type type, float h, int samples_per_sym, int L, double beta=0.3)
 
static sptr make_gmskmod_bc (int samples_per_sym=2, int L=4, double beta=0.3)
 

Additional Inherited Members

- Public Attributes inherited from gr::hier_block2
pmt::pmt_t hier_message_ports_in
 
pmt::pmt_t hier_message_ports_out
 
- Protected Types inherited from gr::basic_block
enum  vcolor { WHITE, GREY, BLACK }
 
- Protected Member Functions inherited from gr::hier_block2
 hier_block2 (void)
 
 hier_block2 (const std::string &name, gr::io_signature::sptr input_signature, gr::io_signature::sptr output_signature)
 
- Protected Member Functions inherited from gr::basic_block
 basic_block (void)
 
 basic_block (const std::string &name, gr::io_signature::sptr input_signature, gr::io_signature::sptr output_signature)
 Protected constructor prevents instantiation by non-derived classes. More...
 
void set_input_signature (gr::io_signature::sptr iosig)
 may only be called during constructor More...
 
void set_output_signature (gr::io_signature::sptr iosig)
 may only be called during constructor More...
 
void set_color (vcolor color)
 Allow the flowgraph to set for sorting and partitioning. More...
 
vcolor color () const
 
virtual bool has_msg_handler (pmt::pmt_t which_port)
 Tests if there is a handler attached to port which_port. More...
 
virtual void dispatch_msg (pmt::pmt_t which_port, pmt::pmt_t msg)
 
- Protected Attributes inherited from gr::basic_block
std::string d_name
 
gr::io_signature::sptr d_input_signature
 
gr::io_signature::sptr d_output_signature
 
long d_unique_id
 
long d_symbolic_id
 
std::string d_symbol_name
 
std::string d_symbol_alias
 
vcolor d_color
 
bool d_rpc_set
 
msg_queue_map_t msg_queue
 
std::vector< boost::any > d_rpc_vars
 
pmt::pmt_t d_message_subscribers
 

Detailed Description

Generic CPM modulator.

Examples:

  • Setting h = 0.5, L = 1, type = LREC yields MSK.
  • Setting h = 0.5, type = GAUSSIAN and beta = 0.3 yields GMSK as used in GSM.

The input of this block are symbols from an M-ary alphabet +/-1, +/-3, ..., +/-(M-1). Usually, M = 2 and therefore, the valid inputs are +/-1. The modulator will silently accept any other inputs, though. The output is the phase-modulated signal.

Member Typedef Documentation

Member Function Documentation

virtual double gr::digital::cpmmod_bc::beta ( ) const
pure virtual

Return the value of beta for the modulator.

virtual float gr::digital::cpmmod_bc::index ( ) const
pure virtual

Return the modulation index of the modulator.

virtual int gr::digital::cpmmod_bc::length ( ) const
pure virtual

Return the length of the phase duration (in symbols)

static sptr gr::digital::cpmmod_bc::make ( analog::cpm::cpm_type  type,
float  h,
int  samples_per_sym,
int  L,
double  beta = 0.3 
)
static

Make CPM modulator block.

Parameters
typeThe modulation type. Can be one of LREC, LRC, LSRC, TFM or GAUSSIAN. See gr_cpm::phase_response() for a detailed description.
hThe modulation index. $ h \cdot \pi$ is the maximum phase change that can occur between two symbols, i.e., if you only send ones, the phase will increase by $ h \cdot \pi$ every samples_per_sym samples. Set this to 0.5 for Minimum Shift Keying variants.
samples_per_symSamples per symbol.
LThe length of the phase duration in symbols. For L=1, this yields full- response CPM symbols, for L > 1, partial-response.
betaFor LSRC, this is the rolloff factor. For Gaussian pulses, this is the 3 dB time-bandwidth product.
static sptr gr::digital::cpmmod_bc::make_gmskmod_bc ( int  samples_per_sym = 2,
int  L = 4,
double  beta = 0.3 
)
static

Make GMSK modulator block.

The type is GAUSSIAN and the modulation index for GMSK is 0.5. This are populated automatically by this factory function.

Parameters
samples_per_symSamples per symbol.
LThe length of the phase duration in symbols. For L=1, this yields full- response CPM symbols, for L > 1, partial-response.
betaFor LSRC, this is the rolloff factor. For Gaussian pulses, this is the 3 dB time-bandwidth product.
virtual int gr::digital::cpmmod_bc::samples_per_sym ( ) const
pure virtual

Return the number of samples per symbol.

virtual std::vector<float> gr::digital::cpmmod_bc::taps ( ) const
pure virtual

Return the phase response FIR taps.

virtual int gr::digital::cpmmod_bc::type ( ) const
pure virtual

Return the type of CPM modulator.


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