Classes
class	block_base
	The block_base class. More...

class	block
	The block class template. More...

class	channel_est
	The channel_est block. More...

struct	circular_accumulator
	The circular_accumulator template. More...

class	fft
	The fft class. More...

class	fft_symbols
	The fft_symbols block. More...

class	frame_builder
	The frame_builder class. More...

struct	FrameData
	The FrameData struct. More...

class	frame_decoder
	The frame_decoder block. More...

class	frame_detector
	The frame_detector block. More...

class	interleaver
	The interleaver class. More...

struct	BitInterleave
	The BitInterleave struct. More...

class	modulator
	The modulator class. More...

class	phase_tracker
	The phase_tracker block. More...

struct	plcp_header
	The plcp_header struct is a container for PLCP Headers and their respective parameters. More...

class	ppdu
	The ppdu class. More...

class	puncturer
	The puncturer class. More...

class	QAM
	Template for QAM class. More...

struct	RateParams
	The RateParams struct. More...

class	receiver
	The receiver class is the public interface for the fun_ofdm receiver. This is the easiest way to start receiving 802.11a OFDM frames out of the box. More...

class	receiver_chain
	The Receiver Chain class. More...

class	symbol_mapper
	The symbol_mapper class. More...

struct	tagged_vector
	tagged_vector struct More...

struct	tagged_sample
	The tagged_sample struct. More...

class	timing_sync
	The timing_sync block. More...

class	transmitter
	The transmitter class is the public interface for the fun_ofdm transmit chain. This is the easiest way to start transmitting 802.11a OFDM frames out of the box. More...

struct	usrp_params
	The usrp_params struct which holds parameters for the USRP object such as center frequency, sample rate, tx/rx gain, etc.. More...

class	usrp
	A simple class used to easily interface with a USRP. More...

union	decision_t
	decision_t is a BIT vector More...

union	metric_t
	the metric_t attribute More...

struct	v
	The v struct. More...

class	viterbi
	The viterbi class. More...

Enumerations
enum	Rate : int { RATE_1_2_BPSK = 0, RATE_2_3_BPSK = 1, RATE_3_4_BPSK = 2, RATE_1_2_QPSK = 3, RATE_2_3_QPSK = 4, RATE_3_4_QPSK = 5, RATE_1_2_QAM16 = 6, RATE_2_3_QAM16 = 7, RATE_3_4_QAM16 = 8, RATE_2_3_QAM64 = 9, RATE_3_4_QAM64 = 10 }
	An enum for referencing the different PHY data rates by name. More...

enum	vector_tag { NONE, STS_START, STS_END, LTS_START, LTS1, LTS2, START_OF_FRAME }
	The vector_tag enum. More...

Functions
void	partab_init (void)

static int	parityb (unsigned char x)

static int	parity (int x)

Variables
unsigned char	Partab [256]

int	Parity_initialized

const double	POLARITY [127]
	The polarity of the pilot subcarriers beginning with the pilots of the SIGNAL symbol being multiplied by POLARITY[0], then the next symbol being multiplied by POLARITY[1] and so on. More...

static int	PILOTS [4][2]
	The index of each pilot in the 64 sample symbol and its initial value before being multiplied by its corresponding polarity. More...

static int	DATA_SUBCARRIERS [48]
	The indicies of the 48 data subcarriers in the 64 sample symbol. More...

static std::complex< double >	PREAMBLE_SAMPLES [320]
	Full 802.11a Preamble in time domain. The preamble consists of 320 samples. The first 160 samples are made up of 10 copies of the short training sequence which is 16 samples long (16*10 = 160). The second half of the preamble is made up of two long training sequences which are 64 samples each preceded by a 32 sample cyclic prefix which is essentially the last half of one LTS (32+64+64 = 160). More...

static std::complex< double >	LTS_FREQ_DOMAIN [64]
	Long Training Sequence in frequency domain. More...

static std::complex< double >	LTS_TIME_DOMAIN_CONJ [64]
	Complex conjugate of Long Training Sequence in time domain. More...

static std::complex< double >	STS_SAMPLES [16]
	Short Training Sequence in time domain. More...

static std::vector< unsigned char >	VALID_RATES = {0xD, 0xE, 0xF, 0x5, 0x6, 0x7, 0x9, 0xA, 0xB, 0x1, 0x3}
	Valid rate field values. More...

int	lts_count = 0

Enumeration Type Documentation

enum fun::Rate : int

An enum for referencing the different PHY data rates by name.

The numbers represent the coding rate used with the first number being the numerator and the second number being the denominator followed by the modulation used. For example RATE_1_2_BPSK means BPSK modulation with a Rate 1/2 convoluational code.

Enumerator
RATE_1_2_BPSK	Rate 1/2 code : BPSK modulation.
RATE_2_3_BPSK	Rate 2/3 code : BPSK modulation.
RATE_3_4_BPSK	Rate 3/4 code : BPSK modulation.
RATE_1_2_QPSK	Rate 1/2 code : QPSK modulation.
RATE_2_3_QPSK	Rate 2/3 code : QPSK modulation.
RATE_3_4_QPSK	Rate 3/4 code : QPSK modulation.
RATE_1_2_QAM16	Rate 1/2 code : QAM16 modulation.
RATE_2_3_QAM16	Rate 2/3 code : QAM16 modulation.
RATE_3_4_QAM16	Rate 3/4 code : QAM16 modulation.
RATE_2_3_QAM64	Rate 2/3 code : QAM64 modulation.
RATE_3_4_QAM64	Rate 3/4 code : QAM64 modulation.

Definition at line 31 of file rates.h.

               : int
     {
         RATE_1_2_BPSK = 0,  
         RATE_2_3_BPSK = 1,  
         RATE_3_4_BPSK = 2,  
         RATE_1_2_QPSK = 3,  
         RATE_2_3_QPSK = 4,  
         RATE_3_4_QPSK = 5,  
         RATE_1_2_QAM16 = 6, 
         RATE_2_3_QAM16 = 7, 
         RATE_3_4_QAM16 = 8, 
         RATE_2_3_QAM64 = 9, 
         RATE_3_4_QAM64 = 10 
     };

enum fun::vector_tag

The vector_tag enum.

These tags are used to mark specific locations in the received packet such as the start of the short & long training sequences

Enumerator
NONE	No tag.
STS_START	Approximate start of STS.
STS_END	Approximate end of STS.
LTS_START	Estimated beginning of LTS (i.e. first sample of the LTS Cyclic prefix.
LTS1	Estimated beginning of first LTS symbol (32 samples after LTS_START.
LTS2	Estimated beginning of second LTS symbol (64 samples after LTS1.
START_OF_FRAME	Estimated beginning of frame i.e. Signal symbol (64 samples after LTS2)

Definition at line 25 of file tagged_vector.h.

     {
         NONE,           
         STS_START,      
         STS_END,        
         LTS_START,      
         LTS1,           
         LTS2,           
         START_OF_FRAME, 
     };

Function Documentation

static int fun::parity ( int x)

inlinestatic

Definition at line 43 of file parity.h.

References parityb().

Referenced by fun::viterbi::conv_encode(), fun::ppdu::decode_header(), fun::ppdu::encoder_header(), and fun::viterbi::viterbi_alloc().

                                    {
       /* Fold down to one byte */
       x ^= (x >> 16);
       x ^= (x >> 8);
       return parityb(x);
     }

static int fun::parityb ( unsigned char x)

inlinestatic

Definition at line 33 of file parity.h.

References Parity_initialized, Partab, and partab_init().

Referenced by parity().

                                               {
       extern unsigned char Partab[256];
       extern int Parity_initialized;
       if(!Parity_initialized){
         partab_init();
       }
       return Partab[x];
     }

void fun::partab_init ( )

static inline parity(int x) – compute parity (up to 32 bits?)

Definition at line 17 of file parity.cpp.

References Parity_initialized, and Partab.

Referenced by parityb().

                           {
       int i,cnt,ti;
 
       /* Initialize parity lookup table */
       for(i=0;i<256;i++){
         cnt = 0;
         ti = i;
         while(ti){
           if(ti & 1)
             cnt++;
           ti >>= 1;
         }
         Partab[i] = cnt & 1;
       }
       Parity_initialized=1;
     }

Variable Documentation

int fun::DATA_SUBCARRIERS[48]

static

Initial value:

=
    {
       6,  7,  8,  9,  10,   12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,  26, 27, 28, 29, 30, 31,
       33, 34, 35, 36, 37, 38,  40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52,  54, 55, 56, 57, 58
    }

The indicies of the 48 data subcarriers in the 64 sample symbol.

Definition at line 46 of file phase_tracker.cpp.

Referenced by fun::phase_tracker::work().

int fun::lts_count = 0

Definition at line 33 of file timing_sync.cpp.

std::complex<double> fun::LTS_FREQ_DOMAIN[64]

static

Long Training Sequence in frequency domain.

Definition at line 363 of file preamble.h.

Referenced by fun::channel_est::work().

std::complex<double> fun::LTS_TIME_DOMAIN_CONJ[64]

static

Complex conjugate of Long Training Sequence in time domain.

Definition at line 432 of file preamble.h.

Referenced by fun::timing_sync::work().

int fun::Parity_initialized

Definition at line 12 of file parity.cpp.

Referenced by parityb(), and partab_init().

unsigned char fun::Partab[256]

Definition at line 11 of file parity.cpp.

Referenced by parityb(), and partab_init().

int fun::PILOTS[4][2]

static

Initial value:

=
    {
      { 11,  1 },
      { 25,  1 },
      { 39,  1 },
      { 53, -1 },
    }

The index of each pilot in the 64 sample symbol and its initial value before being multiplied by its corresponding polarity.

Definition at line 37 of file phase_tracker.cpp.

Referenced by fun::phase_tracker::work().

const double fun::POLARITY[127]

Initial value:

= {
             1, 1, 1, 1,-1,-1,-1, 1,-1,-1,-1,-1, 1, 1,-1, 1,
            -1,-1, 1, 1,-1, 1, 1,-1, 1, 1, 1, 1, 1, 1,-1, 1,
             1, 1,-1, 1, 1,-1,-1, 1, 1, 1,-1, 1,-1,-1,-1, 1,
            -1, 1,-1,-1, 1,-1,-1, 1, 1, 1, 1, 1,-1,-1, 1, 1,
            -1,-1, 1,-1, 1,-1, 1, 1,-1,-1,-1, 1, 1,-1,-1,-1,
            -1, 1,-1,-1, 1,-1, 1, 1, 1, 1,-1, 1,-1, 1,-1, 1,
            -1,-1,-1,-1,-1, 1,-1, 1, 1,-1, 1,-1, 1, 1, 1,-1,
            -1, 1,-1,-1,-1, 1, 1, 1,-1,-1,-1,-1,-1,-1,-1
    }

The polarity of the pilot subcarriers beginning with the pilots of the SIGNAL symbol being multiplied by POLARITY[0], then the next symbol being multiplied by POLARITY[1] and so on.

Definition at line 23 of file phase_tracker.cpp.

Referenced by fun::phase_tracker::work().

std::complex<double> fun::PREAMBLE_SAMPLES[320]

static

Full 802.11a Preamble in time domain. The preamble consists of 320 samples. The first 160 samples are made up of 10 copies of the short training sequence which is 16 samples long (16*10 = 160). The second half of the preamble is made up of two long training sequences which are 64 samples each preceded by a 32 sample cyclic prefix which is essentially the last half of one LTS (32+64+64 = 160).

Definition at line 24 of file preamble.h.

Referenced by fun::frame_builder::build_frame().

std::complex<double> fun::STS_SAMPLES[16]

static

Initial value:

=
    {
        std::complex<double>( 0.0459987545121 ,  0.0459987545121),
        std::complex<double>(-0.132443716852  ,  0.00233959188499),
        std::complex<double>(-0.0134727232705 , -0.0785247857538),
        std::complex<double>( 0.142755292821  , -0.0126511678539),
        std::complex<double>( 0.0919975090242 ,  0.0),
        std::complex<double>( 0.142755292821  , -0.0126511678539),
        std::complex<double>(-0.0134727232705 , -0.0785247857538),
        std::complex<double>(-0.132443716852  ,  0.00233959188499),
        std::complex<double>( 0.0459987545121 ,  0.0459987545121),
        std::complex<double>( 0.00233959188499, -0.132443716852),
        std::complex<double>(-0.0785247857538 , -0.0134727232705),
        std::complex<double>(-0.0126511678539 ,  0.142755292821),
        std::complex<double>( 0.0             ,  0.0919975090242),
        std::complex<double>(-0.0126511678539 ,  0.142755292821),
        std::complex<double>(-0.0785247857538 , -0.0134727232705),
        std::complex<double>( 0.00233959188499, -0.132443716852),
    }

Short Training Sequence in time domain.

Definition at line 501 of file preamble.h.

std::vector<unsigned char> fun::VALID_RATES = {0xD, 0xE, 0xF, 0x5, 0x6, 0x7, 0x9, 0xA, 0xB, 0x1, 0x3}

static

Valid rate field values.

Definition at line 21 of file rates.h.

Referenced by fun::ppdu::decode_header().

Classes

Enumerations

Functions

Variables

Enumeration Type Documentation

Function Documentation

Variable Documentation