-
Notifications
You must be signed in to change notification settings - Fork 2
/
Copy pathantenna.cpp
377 lines (347 loc) · 14.8 KB
/
antenna.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
/******************************************************************************************/
/**** FILE: antenna.cpp ****/
/**** Michael Mandell 9/16/03 ****/
/******************************************************************************************/
/**** Simulate cellular network using event-based Monte-Carlo simulation ****/
/******************************************************************************************/
#include <math.h>
#include <string.h>
#include <time.h>
#include <QDebug>
#include "cconst.h"
#include "wisim.h"
#include "antenna.h"
/******************************************************************************************/
/**** FUNCTION: AntennaClass::AntennaClass ****/
/******************************************************************************************/
AntennaClass::AntennaClass(int p_type, char *p_strid)
{
if (p_strid) {
strid = strdup(p_strid);
} else {
strid = (char *) NULL;
}
type = p_type;
filename = (char *) NULL;
gain_db_v = (double *) NULL;
gain_db_h = (double *) NULL;
is_omni = (type == CConst::antennaOmni ? 1 : 0);
h_width = 360.0;
}
AntennaClass::~AntennaClass()
{
if (strid) {
free(strid);
}
if (filename) {
free(filename);
}
if (gain_db_h) {
free(gain_db_h);
}
if (gain_db_v) {
free(gain_db_v);
}
}
/******************************************************************************************/
/**** FUNCTION: AntennaClass:: "get_" functions ****/
/******************************************************************************************/
char *AntennaClass::get_strid() { return(strid); }
int AntennaClass::get_type() { return(type); }
int AntennaClass::get_is_omni() { return(is_omni); }
char *AntennaClass::get_filename() { return(filename); }
/******************************************************************************************/
/**** FUNCTION: AntennaClass::readFile ****/
/******************************************************************************************/
int AntennaClass::readFile(char *filepath, char *p_filename)
{
char *errmsg = CVECTOR(MAX_LINE_SIZE);
char *full_path_filename;
FILE *fp;
filename = strdup(p_filename);
full_path_filename = CVECTOR( strlen(filepath) + strlen(filename) );
sprintf(full_path_filename, "%s%s", filepath, filename);
if ( !(fp = fopen(full_path_filename, "rb")) ) {
sprintf(errmsg, "ERROR: cannot open antenna file %s\n", full_path_filename);
PRMSG(stdout, errmsg);
return(0);
}
sprintf(errmsg, "Reading antenna file: %s\n", full_path_filename);
PRMSG(stdout, errmsg);
free(full_path_filename);
enum state_enum {
STATE_HEADER,
STATE_HORIZONTAL,
STATE_VERTICAL,
STATE_DONE
};
int state = STATE_HEADER;
int linenum = 0;
int num_h = -1;
int num_v = -1;
int idx = -1;
double gain_db = 0.0;
double tilt_deg;
double *f_phs_h = (double *) NULL;
double *f_gain_h = (double *) NULL;
double *f_phs_v = (double *) NULL;
double *f_gain_v = (double *) NULL;
char *line = CVECTOR(MAX_LINE_SIZE);
char *str1, *str2;
while ( fgetline(fp, line) ) {
#if 0
printf("%s", line);
#endif
linenum++;
str1 = strtok(line, CHDELIM);
if ( str1 && (str1[0] != '#') ) {
str2 = strtok(NULL, CHDELIM);
switch(state) {
case STATE_HEADER:
if (strcmp(str1, "NAME") == 0) {
strid = strdup(str2);
} else if (strcmp(str1, "FREQUENCY") == 0) {
} else if (strcmp(str1, "H_WIDTH") == 0) {
h_width = atof(str2);
is_omni = ( (h_width == 360.0) ? 1 : 0 );
} else if (strcmp(str1, "V_WIDTH") == 0) {
} else if (strcmp(str1, "FRONT_TO_BACK") == 0) {
} else if (strcmp(str1, "GAIN") == 0) {
int n = strlen(str2);
if ((n>3) && strcmp(str2+n-3, "dBi") == 0) {
str2[n-3] = (char) NULL;
gain_db = atof(str2);
} else {
sprintf(errmsg, "ERROR: invalid antenna file \"%s(%d)\"\n"
"Gain: \"%s\" must be in dBi\n", filename, linenum, str2);
PRMSG(stdout, errmsg);
return(0);
}
} else if (strcmp(str1, "TILT") == 0) {
tilt_deg = -fabs(atof(str2)); /* Force tilt to be interpreted as pointing down */
tilt_rad = tilt_deg * PI / 180.0;
while(tilt_rad >= PI/2) { tilt_rad -= 2*PI; }
while(tilt_rad < -PI/2) { tilt_rad += 2*PI; }
if ( (tilt_rad < -PI/2) || (tilt_rad > PI/2) ) {
sprintf(errmsg, "ERROR: invalid antenna file \"%s(%d)\"\n"
"TILT: \"%s\" must be between +/- 90 degrees\n", filename, linenum, str2);
PRMSG(stdout, errmsg);
return(0);
}
} else if (strcmp(str1, "POLARIZATION") == 0) {
} else if (strcmp(str1, "HORIZONTAL") == 0) {
num_h = atoi(str2);
f_phs_h = DVECTOR(num_h);
f_gain_h = DVECTOR(num_h);
idx = 0;
state = STATE_HORIZONTAL;
} else {
sprintf(errmsg, "ERROR: invalid antenna file \"%s(%d)\"\n"
"Unrecognized keywork in header: \"%s\"\n", filename, linenum, str1);
PRMSG(stdout, errmsg);
return(0);
}
break;
case STATE_HORIZONTAL:
if (idx <= num_h-1) {
f_phs_h[idx] = atof(str1);
f_gain_h[idx] = gain_db - atof(str2);
idx++;
} else if (strcmp(str1, "VERTICAL") == 0) {
num_v = atoi(str2);
f_phs_v = DVECTOR(num_v);
f_gain_v = DVECTOR(num_v);
idx = 0;
state = STATE_VERTICAL;
} else {
sprintf(errmsg, "ERROR: invalid antenna file \"%s(%d)\"\n"
"Unrecognized keywork in header: \"%s\"\n", filename, linenum, str1);
PRMSG(stdout, errmsg);
return(0);
}
break;
case STATE_VERTICAL:
if (idx <= num_v-1) {
f_phs_v[idx] = atof(str1);
f_gain_v[idx] = gain_db - atof(str2);
idx++;
} else {
CORE_DUMP;
}
if (idx == num_v) {
state = STATE_DONE;
}
break;
case STATE_DONE:
sprintf(errmsg, "ERROR: invalid antenna file \"%s(%d)\"\n"
"False additional data encountered\n", filename, linenum);
PRMSG(stdout, errmsg);
return(0);
break;
default:
sprintf(errmsg, "ERROR: invalid antenna file \"%s(%d)\"\n"
"Invalid state (%d) encountered\n", filename, linenum, state);
PRMSG(stdout, errmsg);
return(0);
break;
}
}
}
printf("Smoothing Vertical Antenna Pattern for %s ... \n", filename);
int sn = 4, k, k_idx;
double pwr;
double *new_gain_v = DVECTOR(num_v);
for (idx=0; idx<=num_v-1; idx++) {
pwr = 0.0;
for (k=-sn; k<=sn; k++) {
k_idx = (idx + k + num_v) % num_v;
pwr += exp(f_gain_v[k_idx]*log(10.0)/10.0);
}
pwr /= (2*sn+1);
new_gain_v[idx] = 10.0*log(pwr)/log(10.0);
}
free(f_gain_v);
f_gain_v = new_gain_v;
if (state != STATE_DONE) {
sprintf(errmsg, "ERROR: invalid antenna file \"%s\"\n"
"Premature EOF encountered\n", filename);
PRMSG(stdout, errmsg);
return(0);
}
if ( (type == CConst::antennaLUT) || (type == CConst::antennaLUT_H) ) {
gain_db_h = DVECTOR(CConst::antenna_num_interp_pts);
if (!spline_init_lut(f_phs_h, f_gain_h, num_h, CConst::antenna_num_interp_pts, gain_db_h)) {
sprintf(errmsg, "ERROR: invalid antenna file \"%s\"\n"
"Unable to create spline for horizontal antenna radiation pattern\n", filename);
PRMSG(stdout, errmsg);
return(0);
}
} else {
gain_db_h = (double *) NULL;
}
if ( (type == CConst::antennaLUT) || (type == CConst::antennaLUT_V) ) {
gain_db_v = DVECTOR(CConst::antenna_num_interp_pts);
if (!spline_init_lut(f_phs_v, f_gain_v, num_v, CConst::antenna_num_interp_pts, gain_db_v)) {
sprintf(errmsg, "ERROR: invalid antenna file \"%s\"\n"
"Unable to create spline for vertical antenna radiation pattern\n", filename);
PRMSG(stdout, errmsg);
return(0);
}
double pi_minus_tilt = PI - tilt_rad;
while(pi_minus_tilt >= PI) { pi_minus_tilt -= 2*PI; }
gain_fwd_db = spline_eval_lut(tilt_rad, gain_db_v, CConst::antenna_num_interp_pts);
gain_back_db = spline_eval_lut(pi_minus_tilt, gain_db_v, CConst::antenna_num_interp_pts);
} else {
gain_db_v = (double *) NULL;
}
free(f_phs_h);
free(f_gain_h);
free(f_phs_v);
free(f_gain_v);
free(line);
free(errmsg);
fclose(fp);
return(1);
}
/******************************************************************************************/
/**** FUNCTION: AntennaClass::gainDB ****/
/**** This routine computes the antenna power gain for the specified sectorted antenna ****/
/**** in the direction of the vector(dx, dy, dz). ****/
/******************************************************************************************/
double AntennaClass::gainDB(double dx, double dy, double dz, double h_angle_rad)
{
double theta = 0.0;
double phi = 0.0;
double gain_db = 0.0;
if (type == CConst::antennaOmni) {
gain_db = 0.0;
} else if (type == CConst::antennaLUT_H) {
phi = atan2(dy, dx);
phi -= h_angle_rad;
while(phi >= PI) { phi -= 2*PI; }
while(phi < -PI) { phi += 2*PI; }
gain_db = spline_eval_lut(phi, gain_db_h, CConst::antenna_num_interp_pts);
} else if (type == CConst::antennaLUT_V) {
theta = atan2(dz, sqrt(dx*dx + dy*dy));
gain_db = spline_eval_lut(theta, gain_db_v, CConst::antenna_num_interp_pts);
} else if (type == CConst::antennaLUT) {
phi = atan2(dy, dx);
phi -= h_angle_rad;
while(phi >= PI) { phi -= 2*PI; }
while(phi < -PI) { phi += 2*PI; }
theta = atan2(dz, sqrt(dx*dx + dy*dy));
double pi_minus_theta = PI - theta;
while(pi_minus_theta >= PI) { pi_minus_theta -= 2*PI; }
double gv1 = spline_eval_lut(theta, gain_db_v, CConst::antenna_num_interp_pts);
double gv2 = spline_eval_lut(pi_minus_theta, gain_db_v, CConst::antenna_num_interp_pts);
double gh = spline_eval_lut(phi, gain_db_h, CConst::antenna_num_interp_pts);
gain_db = (1.0 - fabs(phi)/PI)*(gv1 - gain_fwd_db)
+ (fabs(phi)/PI)*(gv2 - gain_back_db)
+ gh;
} else {
CORE_DUMP;
}
return(gain_db);
}
/******************************************************************************************/
/**** FUNCTION: check_antenna_gain ****/
/**** This routine writes antenna gain in two column format to the specified file. ****/
/**** The first column is angle in degrees from -180 to 180 and the second column is ****/
/**** antenna gain in dB. The purpose of this routine is to privide a means of ****/
/**** verifying the integrity of the spline interpolation used on the antenna data. ****/
/**** orient == 0 : Horizontal pattern ****/
/**** orient == 1 : Vertical pattern ****/
/******************************************************************************************/
int AntennaClass::checkGain(char *flname, int orient, int numpts)
{
int i;
double phase_deg, phase_rad, dx, dy, dz, gain_db;
char *chptr;
char *errmsg = CVECTOR(MAX_LINE_SIZE);
FILE *fp;
if (numpts <= 0) {
chptr = errmsg;
chptr += sprintf(chptr, "ERROR in routine check_antenna_gain()\n");
chptr += sprintf(chptr, "numpts = %d must be > 0\n", numpts);
PRMSG(stdout, errmsg);
return(0);
}
if (!flname) {
chptr = errmsg;
chptr += sprintf(chptr, "ERROR in routine check_antenna_gain()\n");
chptr += sprintf(chptr, "No filename specified\n");
PRMSG(stdout, errmsg);
return(0);
}
if ( !(fp = fopen(flname, "w")) ) {
chptr = errmsg;
chptr += sprintf(chptr, "ERROR in routine check_antenna_gain()\n");
chptr += sprintf(chptr, "Unable to write to file %s\n", flname);
PRMSG(stdout, errmsg);
return(0);
}
chptr = errmsg;
chptr += sprintf(chptr, "CHECKING %s ANTENNA GAIN\n", (orient==0 ? "HORIZONTAL" : "VERTICAL") );
chptr += sprintf(chptr, "WRITING %d POINTS to FILE %s\n", numpts, flname);
PRMSG(stdout, errmsg);
for (i=0; i<=numpts-1; i++) {
phase_deg = -180.0 + 360.0*i/numpts;
phase_rad = phase_deg * PI / 180.0;
dx = cos(phase_rad);
dy = sin(phase_rad);
if (orient == 0) {
dz = sin(tilt_rad);
gain_db = gainDB(dx, dy, dz, 0.0);
} else {
gain_db = gainDB(dx, 0.0, dy, 0.0);
}
sprintf(errmsg, "%12.10f %12.10f\n", phase_deg, gain_db);
PRMSG(fp, errmsg);
}
sprintf(errmsg, "\n");
PRMSG(fp, errmsg);
fclose(fp);
free(errmsg);
return(1);
}
/******************************************************************************************/