Adaptive Threshold Energy Detection Spectrum Sensing Method for L-Band Digital Aeronautical Communication System

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Items</td><td class="align_center">Values</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Carrier frequency/GHz</td><td class="align_center">1</td></tr><tr><td class="align_left">Transmission bandwidth/MHz</td><td class="align_center">0.49805</td></tr><tr><td class="align_left">Sampling interval/ <svg height="9.39034pt" id="M65" style="vertical-align:-3.42943pt" version="1.1" viewbox="-0.0498162 -5.96091 12.2349 9.39034" width="12.2349pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M538 96L524 119C492 88 454 63 446 63C439 63 434 70 440 101C463 223 491 341 518 448H508L433 422L401 276C355 192 240 56 188 56C163 56 154 89 163 133C184 233 207 338 235 443L230 448L152 424L58 17C40 -60 23 -143 23 -185C23 -241 42 -261 63 -261C92 -261 117 -241 125 -227L124 -221C109 -209 89 -165 89 -103C89 -55 96 -13 105 26H107C121 -3 134 -12 151 -12C172 -12 194 -5 221 16C279 61 330 124 384 194H386C381 159 377 141 368 105C343 3 363 -12 383 -12C416 -12 486 35 538 96Z"></path></g><g transform="matrix(.013,0,0,-0.013,7.216,0)"><path d="M352 391C352 416 319 448 267 448C236 448 173 423 147 400C107 364 96 332 96 304C96 248 143 210 193 181C241 153 258 124 258 100C258 72 232 38 184 38C151 38 107 66 81 108C77 114 64 116 55 111C34 99 23 84 23 65C23 29 81 -12 134 -12C220 -12 325 61 325 141C325 184 297 215 234 256C194 282 161 309 161 346C161 380 188 401 217 401C255 401 279 380 301 353C308 344 313 341 325 347C341 355 352 371 352 391Z"></path></g></svg></td><td class="align_center">1.6</td></tr><tr><td class="align_left">Channel model</td><td class="align_center">AWGN/multipathfading channel</td></tr><tr><td class="align_left">Number of significant subcarriers</td><td class="align_center">50</td></tr><tr><td class="align_left">Modulation mode</td><td class="align_center">QPSK</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Security and Communication Networks

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Table 1

Table 1: Adaptive Threshold Energy Detection Spectrum Sensing Method for L-Band Digital Aeronautical Communication System 