LDPC IP Core User Guide

ID 683381
Date 4/04/2022
Public

2.5. LDPC IP Core Performance

Typical expected performance for a LDPC IP Core using the Quartus Prime software with Arria 10 (10AX115R2F40I1SG and 10AX115R4F40I3SG) devices.

The performance tables use the following parameters:

  • soft is Number of soft bits of the decoder variables
  • par is Parallelism
  • lps is Number of LLRs per input symbol
  • full is Full-streaming architecture
  • lay is Layered decoding
  • short is Shorten codeword
  • rate is Coding rate

Decoder

Table 3.  Decoder Performance for DOCSIS Standard
soft par lps Device Speed ALMs M20K fMAX
6 4 4 1 20,256 118 349
3 20,261 - 306
12 12 1 70,395 82 250
3 70,455 - 228
7 4 4 1 22,828 123 336
3 22,861 - 288
12 12 1 79,544 96 253
3 79,747 - 220
8 4 - 1 25,195 127 332
- 3 25,206 - 267
12 - 1 88,390 109 248
- 3 88,066 - 209
Table 4.  Decoder Performance for NASA Standard
soft par full lay speed ALMs M20K fMAX
6 4 0 0 1 47,704 44 351
3 47,723 - 298
1 1 41,896 26 354
3 41,935 - 312
1 0 1 59,688 44 292
3 59,730 - 263
1 1 54,217 26 307
3 54,191 - 266
12 0 0 1 83,371 115 274
3 83,404 - 225
1 1 68,013 58 291
3 68,061 - 244
1 0 1 90,664 115 237
3 90,778 - 206
1 1 75,666 58 271
3 75,565 - 212
20 0 1 1 90,117 96 279
3 90,082 - 243
1 1 96,575 - 217
3 96,703 - 195
7 4 0 0 1 54,812 55 324
3 54,769 - 277
1 1 47,746 33 342
3 47,821 - 310
1 0 1 66,513 55 271
3 66,484 - 253
1 1 60,191 33 310
3 60,119 - 255
12 0 0 1 96,921 134 252
3 96,934 - 218
1 1 77,783 67 289
3 77,955 - 243
1 0 1 103,427 134 208
3 103,649 - 197
1 1 85,297 67 252
3 85,182 204
20 0 1 1 103,554 112 259
3 103,655 - 218
1 1 109,648 - 219
3 109,908 - 181
Table 5.  Decoder Performance for WiMediaNormal codeword and device speed grade = 3. WiMedia designs require no M20Ks
soft par rate ALM fMAX
7 2 0.89 29,576 277
0.75 28,923 293
0.625 29,234 276
0.5 26,092 300
4 0.89 45,902 253
0.75 44,789 276
0.625 45,736 258
0.5 40,133 275
8 0.89 84,145 224
0.75 81,750 244
0.625 84,221 224
0.5 70,975 246
8 2 0.89 33,179 257
0.75 32,656 278
0.625 33,100 259
0.5 29,221 288
4 0.89 51,424 255
0.75 50,914 246
0.625 51,921 254
0.5 44,543 269
8 0.89 94,644 224
0.75 93,259 227
0.625 94,539 221
0.5 81,038 242

Encoder

Table 6.  Encoder Performance for NASA StandardRequires no M20Ks.
BPS speed ALMs fMAX
1 1 2,173 574
3 2,175 552
4 1 5,083 512
3 5,082 453
8 1 10,424 381
3 10,411 344
20 1 24,525 323
3 24,501 275
Table 7.  Encoder Performance for WiMedia StandardNormal codeword; variable coding rate.
BPS speed ALMs M20Ks fMAX
1 1 768 19 569
3 635 496
5 1 1,854 563
3 1,842 503
10 1 2,919 560
3 2,441 499
15 1 4,062 522
3 4,054 469
Table 8.  Encoder Performance for DVB Standard
short rate BPS speed ALMs M20K fMAX
0 1/4 1 1 12,540 1 561
3 12,516 478
10 1 13,245 458
3 13,246 400
20 1 14,184 421
3 14,185 350
8/9 1 1 3,869 538
3 3,840 497
10 1 3,869 538
3 3,840 497
20 1 6,774 501
3 6,784 409
1 1/4 1 1 3,352 571
3 3,353 527
10 1 3,612 511
3 3,611 493
20 1 3,935 558
3 3,933 476
8/9 1 1 570 582
3 569 570
10 1 990 568
3 975 524
20 1 1,788 486
3 1,793 490

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