A Survey: Nonorthogonal Multiple Access with Compressed Sensing Multiuser Detection for mMTC

<div>Matrix representation of data spreading: <i>even</i> indexed columns of <svg height="8.48346pt" id="M133" style="vertical-align:-0.0498209pt" version="1.1" viewbox="-0.0498162 -8.43364 10.0297 8.48346" width="10.0297pt" 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="M41 650V615C111 608 121 602 121 516V134C121 48 111 42 32 35V0H289C413 0 518 27 592 83C668 141 717 229 717 351C717 446 678 517 628 564C564 625 467 650 341 650H41ZM255 540C255 569 257 586 265 595C272 602 292 609 328 609C397 609 450 589 491 547C537 502 566 426 566 331C566 152 474 43 340 43C270 43 255 68 255 140V540Z"></path></g></svg> are spread over matrix <svg height="8.88144pt" id="M134" style="vertical-align:-0.2390099pt" version="1.1" viewbox="-0.0498162 -8.64243 6.68926 8.88144" width="6.68926pt" 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="M442 495C434 557 427 602 423 639C405 645 348 665 284 665C142 665 55 579 55 469C55 373 127 319 229 267C304 227 348 190 348 131C348 67 309 25 248 25C152 25 93 138 73 202L38 190C45 130 58 46 68 21C81 15 100 7 128 -1C158 -10 193 -15 229 -15C375 -15 472 74 472 188C472 287 400 343 295 394C207 439 171 470 171 525C171 583 212 624 268 624C349 624 387 550 407 487L442 495Z"></path></g></svg> and <i>odd</i> indexed columns of <svg height="8.48346pt" id="M135" style="vertical-align:-0.0498209pt" version="1.1" viewbox="-0.0498162 -8.43364 10.0297 8.48346" width="10.0297pt" 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="M41 650V615C111 608 121 602 121 516V134C121 48 111 42 32 35V0H289C413 0 518 27 592 83C668 141 717 229 717 351C717 446 678 517 628 564C564 625 467 650 341 650H41ZM255 540C255 569 257 586 265 595C272 602 292 609 328 609C397 609 450 589 491 547C537 502 566 426 566 331C566 152 474 43 340 43C270 43 255 68 255 140V540Z"></path></g></svg> over shifted <svg height="8.88144pt" id="M136" style="vertical-align:-0.2390099pt" version="1.1" viewbox="-0.0498162 -8.64243 9.66437 8.88144" width="9.66437pt" 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="M442 495C434 557 427 602 423 639C405 645 348 665 284 665C142 665 55 579 55 469C55 373 127 319 229 267C304 227 348 190 348 131C348 67 309 25 248 25C152 25 93 138 73 202L38 190C45 130 58 46 68 21C81 15 100 7 128 -1C158 -10 193 -15 229 -15C375 -15 472 74 472 188C472 287 400 343 295 394C207 439 171 470 171 525C171 583 212 624 268 624C349 624 387 550 407 487L442 495Z"></path></g><g transform="matrix(.013,0,0,-0.013,6.59,0)"><path d="M113 -12C146 -12 170 11 170 46C170 78 146 103 114 103S58 78 58 46C58 11 82 -12 113 -12Z"></path></g></svg></div>

Wireless Communications and Mobile Computing

fig9

Figure 9

Figure 9: A Survey: Nonorthogonal Multiple Access with Compressed Sensing Multiuser Detection for mMTC 