Multiantenna Spectrum Sensing in the Presence of Multiple Primary Users over Fading and Nonfading Channels

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descent="-369" horiz-adv-x="487" vert-adv-y="487"></glyph.data></g><g transform="matrix(.013,0,0,-0.013,32.316,0)"><path d="M535 323V373H52V323H535ZM535 138V188H52V138H535Z" id="g117-34"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="587" vert-adv-y="587"></glyph.data></g><g transform="matrix(.013,0,0,-0.013,43.579,0)"><path d="M535 230V280H52V230H535Z" id="g117-33"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="587" vert-adv-y="587"></glyph.data></g><g transform="matrix(.013,0,0,-0.013,51.21,0)"><path d="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 27V0H384Z" id="g121-47"></path><glyph.data ascent="989" descent="-360" horiz-adv-x="480" vert-adv-y="480"></glyph.data></g></svg>dB, <svg height="11.9479pt" id="M191" style="vertical-align:-3.181499pt" version="1.1" viewbox="-0.0498162 -8.7664 59.8985 11.9479" width="59.8985pt" xmlns="http://www.w3.org/2000/svg" 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297 373 359 285 376V378Z" id="g121-49"></path><glyph.data ascent="989" descent="-360" horiz-adv-x="480" vert-adv-y="480"></glyph.data></g></svg>dB, and <svg height="12.0621pt" id="M192" style="vertical-align:-3.2957pt" version="1.1" viewbox="-0.0498162 -8.7664 66.1619 12.0621" width="66.1619pt" 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="M409 504C401 567 396 607 392 642C354 654 312 665 266 665C137 665 60 583 60 487C60 374 161 325 225 290C300 250 355 215 355 141C355 68 311 21 235 21C131 21 86 122 71 183L41 176C48 128 61 42 68 21C78 16 93 8 118 0C142 -7 175 -15 216 -15C349 -15 438 69 438 174C438 287 344 333 265 374C186 414 138 449 138 522C138 576 172 631 249 631C336 631 363 562 380 499L409 504Z" id="g121-81"></path><glyph.data ascent="989" descent="-360" horiz-adv-x="474" vert-adv-y="474"></glyph.data></g><g transform="matrix(.013,0,0,-0.013,6.005,0)"><path d="M719 650H483V622C553 619 576 606 581 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vert-adv-y="621"></glyph.data></g><g transform="matrix(.0091,0,0,-0.0091,23.737,3.132)"><path d="M290 377C321 398 342 415 358 430C379 451 389 475 389 502C389 578 329 635 238 635H237C184 635 137 610 109 578L64 515L88 493C113 529 154 573 208 573C263 573 303 542 303 482C303 409 233 371 141 341L149 308C165 313 190 319 215 319C272 319 341 284 341 193C342 97 293 43 222 43C162 43 123 71 96 94C89 101 80 101 70 94C61 87 47 73 46 60C44 48 49 36 62 23S118 -12 165 -12C238 -12 430 62 430 223C430 298 379 359 290 375V377Z" id="g58-49"></path><glyph.data ascent="1007" descent="-369" horiz-adv-x="487" vert-adv-y="487"></glyph.data></g><g transform="matrix(.013,0,0,-0.013,32.316,0)"><path d="M535 323V373H52V323H535ZM535 138V188H52V138H535Z" id="g117-34"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="587" vert-adv-y="587"></glyph.data></g><g transform="matrix(.013,0,0,-0.013,43.579,0)"><path d="M535 230V280H52V230H535Z" id="g117-33"></path><glyph.data ascent="3473" descent="-2876" horiz-adv-x="587" vert-adv-y="587"></glyph.data></g><g transform="matrix(.013,0,0,-0.013,51.21,0)"><path d="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 27V0H384Z" id="g121-47"></path><glyph.data ascent="989" descent="-360" horiz-adv-x="480" vert-adv-y="480"></glyph.data></g><g transform="matrix(.013,0,0,-0.013,57.45,0)"><path d="M241 635C89 635 35 457 35 312C35 153 89 -12 240 -12C390 -12 443 166 443 312C443 466 390 635 241 635ZM238 602C329 602 354 454 354 312C354 172 330 22 240 22C152 22 124 173 124 313S148 602 238 602Z" id="g121-46"></path><glyph.data ascent="989" descent="-360" horiz-adv-x="480" vert-adv-y="480"></glyph.data></g></svg>dB. Scenario C: time-varying and normalized channel.</div>

International Journal of Antennas and Propagation

fig6

Figure 6

Figure 6: Multiantenna Spectrum Sensing in the Presence of Multiple Primary Users over Fading and Nonfading Channels 