Use the Channel Setup node to configure PRACH bursts.
When you click the Add Burst button, the software adds a new PRACH burst above the currently selected PRACH burst in the list. The software assigns an identifying number to the new PRACH burst that corresponds to its position in the list and increments the identifying numbers of subsequent PRACH bursts in the list.
Similarly, if you delete the selected PRACH burst using the Delete Burst button, the software adjusts the identifying numbers of the subsequent PRACH bursts according to their new positions in the list.
Click the Column Preset button to access a 
drop-down
that enables you to set parameters for all PRACH bursts to the same value.
Click the links in the table below the graphic for parameter descriptions.
|
1. General Settings |
|
|---|---|
| Logical Root Sequence Index (Incremented) | |
Displays the identifying number of the selected PRACH burst.
Choice: Off | On
Default: On
Double-click or use the drop-down menu to turn the selected PRACH burst on or off.
Range: -60.000 to 20.000 dB
Default: 0.000 dB
Enter a power level in dB for the selected PRACH burst, relative to the carrier power.
Range: 0 to 57
Default: 0
Enter a value for the PRACH configuration index.
Range: 0 to Maximum Number of PRACH Resource.
Default: 0
Enter a value for the PRACH Resource Index.
Displays the PRACH preamble format of the selected PRACH burst.
Displays the occupied frame type of the selected PRACH burst.
Range: 0 to 19
Enter a frame number for the selected PRACH burst. The PRACH burst location displayed in the Resource Mapping Graph at the bottom of the Channel Setup node is determined by the frame number and subframe number defined for the selected burst.
Displays the occupied subframe of the selected PRACH burst.
Default: 0.000000 Hz
Set the frequency offset of the carrier relative to the signal generator's frequency setting.
The range of the parameter is coupled to the Oversampling Ratio, the Base Sampling Rate, the System Bandwidth, and the max ARB Sample Clock of the connected signal generator.
For single carrier configurations, the following table shows the maximum frequency offset:
| Maximum Frequency Offset | System Bandwidth | |||||
|---|---|---|---|---|---|---|
| Maximum Arb Sample Clock (RF Bandwidth) | 1.4 MHz | 3 MHz | 5 MHz | 10 MHz | 15 MHz | 20 MHz |
| 75 MHz (60 MHz) | 29.3 MHz | 28.5 MHz | 26.72 MHz | 20.54 MHz | 22.04 MHz | 15.36 MHz |
| 100 MHz (80 MHz) | 39.3 MHz | 38.5 MHz | 37.5 MHz | 35 MHz | 32.5 MHz | 30 MHz |
| 125 MHz (100 MHz) | 49.3 MHz | 48.5 MHz | 47.5 MHz | 45 MHz | 42.5 MHz | 40 MHz |
| 150 MHz (120 MHz) | 59.3 MHz | 58.5 MHz | 57.5 MHz | 55 MHz | 52.5 MHz | 46.08 MHz |
| 200 MHz (160 MHz) | 79.3 MHz | 78.5 MHz | 77.5 MHz | 75 MHz | 72.5 MHz | 70 MHz |
For multiple carrier configurations, the following table shows the maximum frequency offset:
| Maximum Frequency Offset | System Bandwidth | |||||
|---|---|---|---|---|---|---|
| Maximum Arb Sample Clock (RF Bandwidth) | 1.4 MHz | 3 MHz | 5 MHz | 10 MHz | 15 MHz | 20 MHz |
| 75 MHz (60 MHz) | 15.36 MHz | |||||
| 100 MHz (80 MHz) | 30.72 MHz | 30 MHz | ||||
| 125 MHz (100 MHz) | 46.08 MHz | 45 MHz | 42.5 MHz | 40 MHz | ||
| 150 MHz (120 MHz) | 46.08 MHz | |||||
| 200 MHz (160 MHz) | 76.8 MHz | 75 MHz | 72.5 MHz | 70 MHz | ||
Displays the resource blocks offset of the selected PRACH burst.
Choice: 0.0 us | 0.1 us | 0.2 us | 0.3 us | 0.4 us | 0.5 us | 0.6 us | 0.7 us | 0.8 us | 0.9 us
Default: 0.0 us
Double-click or use the drop-down menu to set the preamble time offset in microseconds (us) for the selected burst.
Choice: Unrestricted Sets | Restricted Sets
Default: Unrestricted Sets
Double-click or use the drop-down menu to set the cyclic shift restriction method.
Range: 0 to 15
Default: 0
Enter a value for the Ncs configuration for preamble generation. (See 3GPP TS 36.211.)
In the case where preambles corresponding to Preamble Index cannot be generated from a single root Zadoff-Chu sequence, Logical Root Sequence Index is incremented until corresponding Preamble sequences are found.
That incremented Logical Root Sequence Index is displayed in the Logical Root Sequence Index (Incremented) field.
Physical Root Sequence Index, Cyclic Shift v and Incremented Logical Root Sequence Index are automatically changed on GUI based on Cyclic Shift Set, Ncs Configuration, Logical Root Sequence Index and Preamble Index.
Range: 0 to 837
Default: 0
Enter a value for the logical root sequence index. (See 3GPP TS 36.211.)
In the case where preambles corresponding to Preamble Index cannot be generated from a single root Zadoff-Chu sequence, Logical Root Sequence Index is incremented until corresponding Preamble sequences are found.
That incremented Logical Root Sequence Index is displayed in the Logical Root Sequence Index (Incremented) field.
Physical Root Sequence Index, Cyclic Shift v and Incremented Logical Root Sequence Index are automatically changed on GUI based on Cyclic Shift Set, Ncs Configuration, Logical Root Sequence Index and Preamble Index.
In the table below, the first Logical root sequence number in the range matches the first Physical root sequence number, the second matches the second, and so on. For example, logical root number 0 = physical root number 129, logical root number 1 = physical root number 710. (See 3GPP TS 36.211.)
|
Logical root sequence number |
Physical root sequence number ยต (in increasing order of the corresponding logical sequence number) |
|---|---|
|
0 to 23 |
129, 710, 140, 699, 120, 719, 210, 629, 168, 671, 84, 755, 105, 734, 93, 746, 70, 769, 60, 779, 2, 837, 1, 838 |
|
24 to 29 |
56, 783, 112, 727, 148, 691 |
|
30 to 35 |
80, 759, 42, 797, 40, 799 |
|
36 to 41 |
35, 804, 73, 766, 146, 693 |
|
42 to 51 |
31, 808, 28, 811, 30, 809, 27, 812, 29, 810 |
|
52 to 63 |
24, 815, 48, 791, 68, 771, 74, 765, 178, 661, 136, 703 |
|
64 to 75 |
86, 753, 78, 761, 43, 796, 39, 800, 20, 819, 21, 818 |
|
76 to 89 |
95, 744, 202, 637, 190, 649, 181, 658, 137, 702, 125, 714, 151, 688 |
|
90 to 115 |
217, 622, 128, 711, 142, 697, 122, 717, 203, 636, 118, 721, 110, 729, 89, 750, 103, 736, 61, 778, 55, 784, 15, 824, 14, 825 |
|
116 to 135 |
12, 827, 23, 816, 34, 805, 37, 802, 46, 793, 207, 632, 179, 660, 145, 694, 130, 709, 223, 616 |
|
136 to 167 |
228, 611, 227, 612, 132, 707, 133, 706, 143, 696, 135, 704, 161, 678, 201, 638, 173, 666, 106, 733, 83, 756, 91, 748, 66, 773, 53, 786, 10, 829, 9, 830 |
|
168 to 203 |
7, 832, 8, 831, 16, 823, 47, 792, 64, 775, 57, 782, 104, 735, 101, 738, 108, 731, 208, 631, 184, 655, 197, 642, 191, 648, 121, 718, 141, 698, 149, 690, 216, 623, 218, 621 |
|
204 to 263 |
152, 687, 144, 695, 134, 705, 138, 701, 199, 640, 162, 677, 176, 663, 119, 720, 158, 681, 164, 675, 174, 665, 171, 668, 170, 669, 87, 752, 169, 670, 88, 751, 107, 732, 81, 758, 82, 757, 100, 739, 98, 741, 71, 768, 59, 780, 65, 774, 50, 789, 49, 790, 26, 813, 17, 822, 13, 826, 6, 833 |
|
264 to 327 |
5, 834, 33, 806, 51, 788, 75, 764, 99, 740, 96, 743, 97, 742, 166, 673, 172, 667, 175, 664, 187, 652, 163, 676, 185, 654, 200, 639, 114, 725, 189, 650, 115, 724, 194, 645, 195, 644, 192, 647, 182, 657, 157, 682, 156, 683, 211, 628, 154, 685, 123, 716, 139, 700, 212, 627, 153, 686, 213, 626, 215, 624, 150, 689 |
|
328 to 383 |
225, 614, 224, 615, 221, 618, 220, 619, 127, 712, 147, 692, 124, 715, 193, 646, 205, 634, 206, 633, 116, 723, 160, 679, 186, 653, 167, 672, 79, 760, 85, 754, 77, 762, 92, 747, 58, 781, 62, 777, 69, 770, 54, 785, 36, 803, 32, 807, 25, 814, 18, 821, 11, 828, 4, 835 |
|
384 to 455 |
3, 836, 19, 820, 22, 817, 41, 798, 38, 801, 44, 795, 52, 787, 45, 794, 63, 776, 67, 772, 72, 767, 76, 763, 94, 745, 102, 737, 90, 749, 109, 730, 165, 674, 111, 728, 209, 630, 204, 635, 117, 722, 188, 651, 159, 680, 198, 641, 113, 726, 183, 656, 180, 659, 177, 662, 196, 643, 155, 684, 214, 625, 126, 713, 131, 708, 219, 620, 222, 617, 226, 613 |
|
456 to 513 |
230, 609, 232, 607, 262, 577, 252, 587, 418, 421, 416, 423, 413, 426, 411, 428, 376, 463, 395, 444, 283, 556, 285, 554, 379, 460, 390, 449, 363, 476, 384, 455, 388, 451, 386, 453, 361, 478, 387, 452, 360, 479, 310, 529, 354, 485, 328, 511, 315, 524, 337, 502, 349, 490, 335, 504, 324, 515 |
|
514 to 561 |
323, 516, 320, 519, 334, 505, 359, 480, 295, 544, 385, 454, 292, 547, 291, 548, 381, 458, 399, 440, 380, 459, 397, 442, 369, 470, 377, 462, 410, 429, 407, 432, 281, 558, 414, 425, 247, 592, 277, 562, 271, 568, 272, 567, 264, 575, 259, 580 |
|
562 to 629 |
237, 602, 239, 600, 244, 595, 243, 596, 275, 564, 278, 561, 250, 589, 246, 593, 417, 422, 248, 591, 394, 445, 393, 446, 370, 469, 365, 474, 300, 539, 299, 540, 364, 475, 362, 477, 298, 541, 312, 527, 313, 526, 314, 525, 353, 486, 352, 487, 343, 496, 327, 512, 350, 489, 326, 513, 319, 520, 332, 507, 333, 506, 348, 491, 347, 492, 322, 517 |
|
630 to 659 |
330, 509, 338, 501, 341, 498, 340, 499, 342, 497, 301, 538, 366, 473, 401, 438, 371, 468, 408, 431, 375, 464, 249, 590, 269, 570, 238, 601, 234, 605 |
|
660 to 707 |
257, 582, 273, 566, 255, 584, 254, 585, 245, 594, 251, 588, 412, 427, 372, 467, 282, 557, 403, 436, 396, 443, 392, 447, 391, 448, 382, 457, 389, 450, 294, 545, 297, 542, 311, 528, 344, 495, 345, 494, 318, 521, 331, 508, 325, 514, 321, 518 |
|
708 to 729 |
346, 493, 339, 500, 351, 488, 306, 533, 289, 550, 400, 439, 378, 461, 374, 465, 415, 424, 270, 569, 241, 598 |
|
730 to 751 |
231, 608, 260, 579, 268, 571, 276, 563, 409, 430, 398, 441, 290, 549, 304, 535, 308, 531, 358, 481, 316, 523 |
|
752 to 765 |
293, 546, 288, 551, 284, 555, 368, 471, 253, 586, 256, 583, 263, 576 |
|
766 to 777 |
242, 597, 274, 565, 402, 437, 383, 456, 357, 482, 329, 510 |
|
778 to 789 |
317, 522, 307, 532, 286, 553, 287, 552, 266, 573, 261, 578 |
|
790 to 795 |
236, 603, 303, 536, 356, 483 |
|
796 to 803 |
355, 484, 405, 434, 404, 435, 406, 433 |
|
804 to 809 |
235, 604, 267, 572, 302, 537 |
|
810 to 815 |
309, 530, 265, 574, 233, 606 |
|
816 to 819 |
367, 472, 296, 543 |
|
820 to 837 |
336, 503, 305, 534, 373, 466, 280, 559, 279, 560, 419, 420, 240, 599, 258, 581, 229, 610 |
Range:
0 to 837 for Format 0 to 3
0 to 137 for Format 4
Default: 0
Displays a value for the incremented logical root sequence index. Refer to 3GPP TS 36.211.
In the case where preambles corresponding to Preamble Index cannot be generated from a single root Zadoff-Chu sequence, Logical Root Sequence Index is incremented until corresponding Preamble sequences are found.
That incremented Logical Root Sequence Index is displayed in the Logical Root Sequence Index (Incremented) field.
Physical Root Sequence Index, Cyclic Shift v and Incremented Logical Root Sequence Index are automatically changed on GUI based on Cyclic Shift Set, Ncs Configuration, Logical Root Sequence Index and Preamble Index.
Range: 0 to 63.
Default: 0
Enter a value for the Preamble Index for PRACH generation. (See 3GPP TS 36.211.)
When the Auto-configuration parameter is set to PRACH Test Preamble (36.141),you must set the Preamble Index to satisfy Cyclic Shift v as defined in 3GPP 36.141 (PRACH Test Preambles test).
Example: Auto-configuration = PRACH Test Preamble (3GPP TS 36.141),Cyclic Shift Set = Normal Mode, and Preamble Format = 0, so Preamble Index should be set to 32 to satisfy Cyclic Shift v = 32 (refer to 34.141 A.6).
| Test preambles for Normal Mode | |||
| Burst Format | Ncs Configuration | Logical Root Sequence Index | Cycle Shift v |
| 0 | 13 | 22 | 32 |
| 1 | 167 | 22 | 2 |
| 2 | 167 | 22 | 0 |
| 3 | 0 | 22 | 0 |
| 4 | 10 | 0 | 0 |
| Test preambles for High Speed Mode | |||
| Burst Format | Ncs Configuration | Logical Root Sequence Index | Cycle Shift v |
| 0 | 15 | 384 | 0 |
| 1 | 202 | 384 | 0 |
| 2 | 202 | 384 | 0 |
| 3 | 237 | 384 | 0 |
Refer to Preamble Index-related information in TS36.212 5.3.3.1.3, TS36.321 5.1, and TS36.331 6.3.2.
Displays the physical root sequence index.
In the case where preambles corresponding to Preamble Index cannot be generated from a single root Zadoff-Chu sequence, Logical Root Sequence Index is incremented until corresponding Preamble sequences are found.
That incremented Logical Root Sequence Index is displayed in the Logical Root Sequence Index (Incremented) field.
Physical Root Sequence Index, Cyclic Shift v and Incremented Logical Root Sequence Index are automatically changed on GUI based on Cyclic Shift Set, Ncs Configuration, Logical Root Sequence Index and Preamble Index.
Range: Determined by the Configuration of the PRACH.
Default: 0
Enter a value for the cyclic shift value for preamble generation. (See 3GPP TS 36.211.)
| Test preambles for Normal Mode | |||
| Burst Format | Ncs Configuration | Logical Root Sequence Index | Cycle Shift v |
| 0 | 13 | 22 | 32 |
| 1 | 167 | 22 | 2 |
| 2 | 167 | 22 | 0 |
| 3 | 0 | 22 | 0 |
| 4 | 10 | 0 | 0 |
| Test preambles for High Speed Mode | |||
| Burst Format | Ncs Configuration | Logical Root Sequence Index | Cycle Shift v |
| 0 | 15 | 384 | 0 |
| 1 | 202 | 384 | 0 |
| 2 | 202 | 384 | 0 |
| 3 | 237 | 384 | 0 |
Refer to Preamble Index-related information in TS36.212 5.3.3.1.3, TS36.321 5.1, and TS36.331 6.3.2.
