1 files changed, 0 insertions, 405 deletions
diff --git a/gr-digital/lib/digital_ofdm_frame_sink.cc b/gr-digital/lib/digital_ofdm_frame_sink.cc
deleted file mode 100644
index f8fb1bbb1d..0000000000
--- a/gr-digital/lib/digital_ofdm_frame_sink.cc
+++ /dev/null
@@ -1,405 +0,0 @@
-/* -*- c++ -*- */
-/*
- * Copyright 2007,2008,2010,2011 Free Software Foundation, Inc.
- * 
- * This file is part of GNU Radio
- * 
- * GNU Radio is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 3, or (at your option)
- * any later version.
- * 
- * GNU Radio is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with GNU Radio; see the file COPYING.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street,
- * Boston, MA 02110-1301, USA.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <digital_ofdm_frame_sink.h>
-#include <gr_io_signature.h>
-#include <gr_expj.h>
-#include <gr_math.h>
-#include <math.h>
-#include <cstdio>
-#include <stdexcept>
-#include <iostream>
-#include <string.h>
-
-#define VERBOSE 0
-
-inline void
-digital_ofdm_frame_sink::enter_search()
-{
-  if (VERBOSE)
-    fprintf(stderr, "@ enter_search\n");
-
-  d_state = STATE_SYNC_SEARCH;
-
-}
-    
-inline void
-digital_ofdm_frame_sink::enter_have_sync()
-{
-  if (VERBOSE)
-    fprintf(stderr, "@ enter_have_sync\n");
-
-  d_state = STATE_HAVE_SYNC;
-
-  // clear state of demapper
-  d_byte_offset = 0;
-  d_partial_byte = 0;
-
-  d_header = 0;
-  d_headerbytelen_cnt = 0;
-
-  // Resetting PLL
-  d_freq = 0.0;
-  d_phase = 0.0;
-  fill(d_dfe.begin(), d_dfe.end(), gr_complex(1.0,0.0));
-}
-
-inline void
-digital_ofdm_frame_sink::enter_have_header()
-{
-  d_state = STATE_HAVE_HEADER;
-
-  // header consists of two 16-bit shorts in network byte order
-  // payload length is lower 12 bits
-  // whitener offset is upper 4 bits
-  d_packetlen = (d_header >> 16) & 0x0fff;
-  d_packet_whitener_offset = (d_header >> 28) & 0x000f;
-  d_packetlen_cnt = 0;
-
-  if (VERBOSE)
-    fprintf(stderr, "@ enter_have_header (payload_len = %d) (offset = %d)\n", 
-	    d_packetlen, d_packet_whitener_offset);
-}
-
-
-unsigned char digital_ofdm_frame_sink::slicer(const gr_complex x)
-{
-  unsigned int table_size = d_sym_value_out.size();
-  unsigned int min_index = 0;
-  float min_euclid_dist = norm(x - d_sym_position[0]);
-  float euclid_dist = 0;
-  
-  for (unsigned int j = 1; j < table_size; j++){
-    euclid_dist = norm(x - d_sym_position[j]);
-    if (euclid_dist < min_euclid_dist){
-      min_euclid_dist = euclid_dist;
-      min_index = j;
-    }
-  }
-  return d_sym_value_out[min_index];
-}
-
-unsigned int digital_ofdm_frame_sink::demapper(const gr_complex *in,
-					       unsigned char *out)
-{
-  unsigned int i=0, bytes_produced=0;
-  gr_complex carrier;
-
-  carrier=gr_expj(d_phase);
-
-  gr_complex accum_error = 0.0;
-  //while(i < d_occupied_carriers) {
-  while(i < d_subcarrier_map.size()) {
-    if(d_nresid > 0) {
-      d_partial_byte |= d_resid;
-      d_byte_offset += d_nresid;
-      d_nresid = 0;
-      d_resid = 0;
-    }
-    
-    //while((d_byte_offset < 8) && (i < d_occupied_carriers)) {
-    while((d_byte_offset < 8) && (i < d_subcarrier_map.size())) {
-      //gr_complex sigrot = in[i]*carrier*d_dfe[i];
-      gr_complex sigrot = in[d_subcarrier_map[i]]*carrier*d_dfe[i];
-      
-      if(d_derotated_output != NULL){
-	d_derotated_output[i] = sigrot;
-      }
-      
-      unsigned char bits = slicer(sigrot);
-
-      gr_complex closest_sym = d_sym_position[bits];
-      
-      accum_error += sigrot * conj(closest_sym);
-
-      // FIX THE FOLLOWING STATEMENT
-      if (norm(sigrot)> 0.001) d_dfe[i] +=  d_eq_gain*(closest_sym/sigrot-d_dfe[i]);
-      
-      i++;
-
-      if((8 - d_byte_offset) >= d_nbits) {
-	d_partial_byte |= bits << (d_byte_offset);
-	d_byte_offset += d_nbits;
-      }
-      else {
-	d_nresid = d_nbits-(8-d_byte_offset);
-	int mask = ((1<<(8-d_byte_offset))-1);
-	d_partial_byte |= (bits & mask) << d_byte_offset;
-	d_resid = bits >> (8-d_byte_offset);
-	d_byte_offset += (d_nbits - d_nresid);
-      }
-      //printf("demod symbol: %.4f + j%.4f   bits: %x   partial_byte: %x   byte_offset: %d   resid: %x   nresid: %d\n", 
-      //     in[i-1].real(), in[i-1].imag(), bits, d_partial_byte, d_byte_offset, d_resid, d_nresid);
-    }
-
-    if(d_byte_offset == 8) {
-      //printf("demod byte: %x \n\n", d_partial_byte);
-      out[bytes_produced++] = d_partial_byte;
-      d_byte_offset = 0;
-      d_partial_byte = 0;
-    }
-  }
-  //std::cerr << "accum_error " << accum_error << std::endl;
-
-  float angle = arg(accum_error);
-
-  d_freq = d_freq - d_freq_gain*angle;
-  d_phase = d_phase + d_freq - d_phase_gain*angle;
-  if (d_phase >= 2*M_PI) d_phase -= 2*M_PI;
-  if (d_phase <0) d_phase += 2*M_PI;
-    
-  //if(VERBOSE)
-  //  std::cerr << angle << "\t" << d_freq << "\t" << d_phase << "\t" << std::endl;
-  
-  return bytes_produced;
-}
-
-
-digital_ofdm_frame_sink_sptr
-digital_make_ofdm_frame_sink(const std::vector<gr_complex> &sym_position, 
-			     const std::vector<unsigned char> &sym_value_out,
-			     gr_msg_queue_sptr target_queue, unsigned int occupied_carriers,
-			     float phase_gain, float freq_gain)
-{
-  return gnuradio::get_initial_sptr(new digital_ofdm_frame_sink(sym_position, sym_value_out,
-								target_queue, occupied_carriers,
-								phase_gain, freq_gain));
-}
-
-
-digital_ofdm_frame_sink::digital_ofdm_frame_sink(const std::vector<gr_complex> &sym_position, 
-						 const std::vector<unsigned char> &sym_value_out,
-						 gr_msg_queue_sptr target_queue, unsigned int occupied_carriers,
-						 float phase_gain, float freq_gain)
-  : gr_sync_block ("ofdm_frame_sink",
-		   gr_make_io_signature2 (2, 2, sizeof(gr_complex)*occupied_carriers, sizeof(char)),
-		   gr_make_io_signature (1, 1, sizeof(gr_complex)*occupied_carriers)),
-    d_target_queue(target_queue), d_occupied_carriers(occupied_carriers), 
-    d_byte_offset(0), d_partial_byte(0),
-    d_resid(0), d_nresid(0),d_phase(0),d_freq(0),d_phase_gain(phase_gain),d_freq_gain(freq_gain),
-    d_eq_gain(0.05)
-{
-  std::string carriers = "FE7F";
-
-  // A bit hacky to fill out carriers to occupied_carriers length
-  int diff = (d_occupied_carriers - 4*carriers.length()); 
-  while(diff > 7) {
-    carriers.insert(0, "f");
-    carriers.insert(carriers.length(), "f");
-    diff -= 8;
-  }
-  
-  // if there's extras left to be processed
-  // divide remaining to put on either side of current map
-  // all of this is done to stick with the concept of a carrier map string that
-  // can be later passed by the user, even though it'd be cleaner to just do this
-  // on the carrier map itself
-  int diff_left=0;
-  int diff_right=0;
-
-  // dictionary to convert from integers to ascii hex representation
-  char abc[16] = {'0', '1', '2', '3', '4', '5', '6', '7', 
-		  '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
-  if(diff > 0) {
-    char c[2] = {0,0};
-
-    diff_left = (int)ceil((float)diff/2.0f);  // number of carriers to put on the left side
-    c[0] = abc[(1 << diff_left) - 1];         // convert to bits and move to ASCI integer
-    carriers.insert(0, c);
-    
-    diff_right = diff - diff_left;	      // number of carriers to put on the right side
-    c[0] = abc[0xF^((1 << diff_right) - 1)];  // convert to bits and move to ASCI integer
-    carriers.insert(carriers.length(), c);
-  }
-
-  // It seemed like such a good idea at the time...
-  // because we are only dealing with the occupied_carriers
-  // at this point, the diff_left in the following compensates
-  // for any offset from the 0th carrier introduced
-  unsigned int i,j,k;
-  for(i = 0; i < (d_occupied_carriers/4)+diff_left; i++) {
-    char c = carriers[i];
-    for(j = 0; j < 4; j++) {
-      k = (strtol(&c, NULL, 16) >> (3-j)) & 0x1;
-      if(k) {
-	d_subcarrier_map.push_back(4*i + j - diff_left);
-      }
-    }
-  }
-  
-  // make sure we stay in the limit currently imposed by the occupied_carriers
-  if(d_subcarrier_map.size() > d_occupied_carriers) {
-    throw std::invalid_argument("digital_ofdm_mapper_bcv: subcarriers allocated exceeds size of occupied carriers");
-  }
-
-  d_bytes_out = new unsigned char[d_occupied_carriers];
-  d_dfe.resize(occupied_carriers);
-  fill(d_dfe.begin(), d_dfe.end(), gr_complex(1.0,0.0));
-
-  set_sym_value_out(sym_position, sym_value_out);
-  
-  enter_search();
-}
-
-digital_ofdm_frame_sink::~digital_ofdm_frame_sink ()
-{
-  delete [] d_bytes_out;
-}
-
-bool
-digital_ofdm_frame_sink::set_sym_value_out(const std::vector<gr_complex> &sym_position, 
-					   const std::vector<unsigned char> &sym_value_out)
-{
-  if (sym_position.size() != sym_value_out.size())
-    return false;
-
-  if (sym_position.size()<1)
-    return false;
-
-  d_sym_position  = sym_position;
-  d_sym_value_out = sym_value_out;
-  d_nbits = (unsigned long)ceil(log10(float(d_sym_value_out.size())) / log10(2.0));
-
-  return true;
-}
-
-
-int
-digital_ofdm_frame_sink::work (int noutput_items,
-			       gr_vector_const_void_star &input_items,
-			       gr_vector_void_star &output_items)
-{
-  const gr_complex *in = (const gr_complex *) input_items[0];
-  const char *sig = (const char *) input_items[1];
-  unsigned int j = 0;
-  unsigned int bytes=0;
-
-  // If the output is connected, send it the derotated symbols
-  if(output_items.size() >= 1)
-    d_derotated_output = (gr_complex *)output_items[0];
-  else
-    d_derotated_output = NULL;
-  
-  if (VERBOSE)
-    fprintf(stderr,">>> Entering state machine\n");
-
-  switch(d_state) {
-      
-  case STATE_SYNC_SEARCH:    // Look for flag indicating beginning of pkt
-    if (VERBOSE)
-      fprintf(stderr,"SYNC Search, noutput=%d\n", noutput_items);
-    
-    if (sig[0]) {  // Found it, set up for header decode
-      enter_have_sync();
-    }
-    break;
-
-  case STATE_HAVE_SYNC:
-    // only demod after getting the preamble signal; otherwise, the 
-    // equalizer taps will screw with the PLL performance
-    bytes = demapper(&in[0], d_bytes_out);
-    
-    if (VERBOSE) {
-      if(sig[0])
-	printf("ERROR -- Found SYNC in HAVE_SYNC\n");
-      fprintf(stderr,"Header Search bitcnt=%d, header=0x%08x\n",
-	      d_headerbytelen_cnt, d_header);
-    }
-
-    j = 0;
-    while(j < bytes) {
-      d_header = (d_header << 8) | (d_bytes_out[j] & 0xFF);
-      j++;
-      
-      if (++d_headerbytelen_cnt == HEADERBYTELEN) {
-	
-	if (VERBOSE)
-	  fprintf(stderr, "got header: 0x%08x\n", d_header);
-	
-	// we have a full header, check to see if it has been received properly
-	if (header_ok()){
-	  enter_have_header();
-	  
-	  if (VERBOSE)
-	    printf("\nPacket Length: %d\n", d_packetlen);
-	  
-	  while((j < bytes) && (d_packetlen_cnt < d_packetlen)) {
-	    d_packet[d_packetlen_cnt++] = d_bytes_out[j++];
-	  }
-	  
-	  if(d_packetlen_cnt == d_packetlen) {
-	    gr_message_sptr msg =
-	      gr_make_message(0, d_packet_whitener_offset, 0, d_packetlen);
-	    memcpy(msg->msg(), d_packet, d_packetlen_cnt);
-	    d_target_queue->insert_tail(msg);		// send it
-	    msg.reset();  				// free it up
-	    
-	    enter_search();				
-	  }
-	}
-	else {
-	  enter_search();				// bad header
-	}
-      }
-    }
-    break;
-      
-  case STATE_HAVE_HEADER:
-    bytes = demapper(&in[0], d_bytes_out);
-
-    if (VERBOSE) {
-      if(sig[0])
-	printf("ERROR -- Found SYNC in HAVE_HEADER at %d, length of %d\n", d_packetlen_cnt, d_packetlen);
-      fprintf(stderr,"Packet Build\n");
-    }
-    
-    j = 0;
-    while(j < bytes) {
-      d_packet[d_packetlen_cnt++] = d_bytes_out[j++];
-      
-      if (d_packetlen_cnt == d_packetlen){		// packet is filled
-	// build a message
-	// NOTE: passing header field as arg1 is not scalable
-	gr_message_sptr msg =
-	  gr_make_message(0, d_packet_whitener_offset, 0, d_packetlen_cnt);
-	memcpy(msg->msg(), d_packet, d_packetlen_cnt);
-	
-	d_target_queue->insert_tail(msg);		// send it
-	msg.reset();  				// free it up
-	
-	enter_search();
-	break;
-      }
-    }
-    break;
-    
-  default:
-    assert(0);
-    
-  } // switch
-
-  return 1;
-}