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Overview
Reed-Solomon codes are used to perform Forward Error Correction (FEC). FEC introduces controlled redundancy in the data before it is transmitted to allow error correction at the receiver. The redundant data (check symbols) are transmitted with the original data to the receiver. A Reed-Solomon Decoder is used in the receiver to correct any transmission errors. This type of error correction is widely used in data communications applications such as Digital Video Broadcast (DVB) and Optical Carriers (i.e. OC-192). Reed-Solomon codes are written in the format RS(n,k) where k is the number of information symbols and n is the total number of symbols in a codeword or block. Each symbol in the codeword is wsymb bits wide. The first k symbols in the Reed-Solomon Encoder output are information symbols and the last n-k symbols are check symbols. This type of encoder, where the information symbols are unchanged and are followed by check symbols in the output, is called a systematic encoder. The figure below illustrates the operation of a systematic encoder.
Features
- 3- to 12-bit Symbol Width
- Configurable Field Polynomial
- Configurable Generator Polynomial: Starting Root and Root Spacing
- User-defined Codewords
- Maximum of 4095 symbols
- Maximum of 256 check symbols
- Shortened codes
- Selectable Reed-Solomon Standards
- OC-192
- DVB
- CCSDS
- ATSC
- IEEE 802.16-2004 WirelessMAN-SCa/OFDM
- IEEE 802.16-2004 WirelessMAN-SC
- Fully Synchronous
- Registered Input Selection
- Systematic Encoder
- Full Handshaking Capability
- Dynamically Variable Block Size
- Dynamically Variable Check Symbols
- Dynamically Variable Check Symbols Puncturing
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Performance and Resource Utilization
LatticeECP31
| IPexpress User-Configurable Mode |
Slices |
LUTs |
Registers |
sysMEM EBRs
|
I/Os |
fMAX (MHz) |
| OC-192 |
128 |
246 |
217 |
-
|
24 |
245 |
| CCSDS |
207 |
402 |
351 |
- |
24 |
255 |
| DVB |
132 |
255 |
216 |
- |
24 |
256 |
| ATSC |
158 |
305 |
248 |
- |
24 |
250 |
| IEEE 802.16-2004 WirelessMAN SCa |
171 |
328 |
263 |
- |
37 |
228 |
| IEEE 802.16-2004 WirelessMAN SC |
1381 |
2729 |
496 |
- |
38 |
110 |
1. Performance and utilization characteristics are generated using LFEC/P20E-5F672C, with Lattice ispLEVER 7.2 SP1 software. When using this IP core in a different density, speed, or grade within the LatticeECP/EC family, performance and utilization may vary.
LatticeECP2M/S1
| IPexpress User-Configurable Mode |
Slices |
LUTs |
Registers |
sysMEM EBRs
|
I/Os |
fMAX (MHz) |
| OC-192 |
130 |
256 |
220 |
-
|
24 |
254 |
| CCSDS |
202 |
400 |
348 |
- |
24 |
242 |
| DVB |
134 |
262 |
220 |
- |
24 |
272 |
| ATSC |
157 |
310 |
249 |
- |
24 |
272 |
| IEEE 802.16-2004 WirelessMAN SCa |
180 |
351 |
262 |
- |
37 |
250 |
| IEEE 802.16-2004 WirelessMAN SC |
1342 |
2673 |
446 |
- |
38 |
107 |
1. Performance and utilization characteristics are generated using LFE2M35E/SE-7F484C, with Lattice ispLEVER 7.2 SP1 software. When using this IP core in a different density, speed, or grade within the LatticeECP2M/S family, performance and utilization may vary.
LatticeECP2/S1
| IPexpress User-Configurable Mode |
Slices |
LUTs |
Registers |
sysMEM EBRs
|
I/Os |
fMAX (MHz) |
| OC-192 |
130 |
256 |
220 |
-
|
24 |
278 |
| CCSDS |
202 |
400 |
348 |
- |
24 |
252 |
| DVB |
134 |
262 |
220 |
- |
24 |
251 |
| ATSC |
157 |
310 |
249 |
- |
24 |
266 |
| IEEE 802.16-2004 WirelessMAN SCa |
180 |
351 |
262 |
- |
37 |
268 |
| IEEE 802.16-2004 WirelessMAN SC |
1342 |
2673 |
446 |
- |
38 |
107 |
1. Performance and utilization characteristics are generated using LFE2-50E/SE-7F484C, with Lattice ispLEVER 7.2 SP1 software. When using this IP core in a different density, speed, or grade within the LatticeECP2/S family, performance and utilization may vary.
LatticeEC/P1
| IPexpress User-Configurable Mode |
Slices |
LUTs |
Registers |
sysMEM EBRs
|
I/Os |
fMAX (MHz) |
| OC-192 |
137 |
270
|
229 |
-
|
24 |
180
|
| CCSDS |
213 |
422 |
355 |
- |
24 |
170 |
| DVB |
142 |
282 |
225 |
- |
24 |
183 |
| ATSC |
156 |
309 |
254 |
- |
24 |
167 |
| IEEE 802.16-2004 WirelessMAN SCa |
163 |
317 |
266 |
- |
37 |
183 |
| IEEE 802.16-2004 WirelessMAN SC |
1324 |
2639 |
533 |
- |
38 |
70 |
1. Performance and utilization characteristics are generated using LFEC/P20E-5F672C, with Lattice ispLEVER 7.2 SP1 software. When using this IP core in a different density, speed, or grade within the LatticeECP/EC family, performance and utilization may vary.
LatticeSC1
| IPexpress User-Configurable Mode |
Slices |
LUTs |
Registers |
sysMEM EBRs
|
I/Os |
fMAX (MHz) |
| OC-192 |
145 |
279 |
214 |
-
|
24 |
417 |
| CCSDS |
251 |
492 |
364 |
- |
24 |
407 |
| DVB |
143 |
278 |
212 |
- |
24 |
446 |
| ATSC |
160 |
313 |
251 |
- |
24 |
438 |
| IEEE 802.16-2004 WirelessMAN SCa |
187 |
361 |
253 |
- |
37 |
395 |
| IEEE 802.16-2004 WirelessMAN SC |
1334 |
2631 |
447 |
- |
38 |
225 |
1. Performance and utilization characteristics are generated using LFSC/M3GA25E-7F900C, with Lattice's ispLEVER 7.2 SP1 software. When using this IP core in a different density, speed, or grade within the LatticeSC/M family, performance and utilization may vary.
LatticeXP21
| IPexpress User-Configurable Mode |
Slices |
LUTs |
Registers |
sysMEM EBRs
|
I/Os |
fMAX (MHz) |
| OC-192 |
130 |
256 |
220 |
-
|
24 |
227 |
| CCSDS |
202 |
400 |
348 |
- |
24 |
242 |
| DVB |
134 |
262 |
220 |
- |
24 |
224 |
| ATSC |
157 |
310 |
249 |
- |
24 |
233 |
| IEEE 802.16-2004 WirelessMAN SCa |
180 |
351 |
262 |
- |
37 |
258 |
| IEEE 802.16-2004 WirelessMAN SC |
1342 |
2673 |
446 |
- |
38 |
90 |
1. Performance and utilization characteristics are generated using LFXP2-17E-7FT256C, with Lattice ispLEVER 7.2 SP1 software. When using this IP core in a different density, speed, or grade within the LatticeXP2 family, performance and utilization may vary.
LatticeXP1
| IPexpress User-Configurable Mode |
Slices |
LUTs |
Registers |
sysMEM EBRs
|
I/Os |
fMAX (MHz) |
| OC-192 |
137 |
270 |
229 |
-
|
24 |
176 |
| CCSDS |
213 |
422 |
355 |
- |
24 |
167 |
| DVB |
142 |
282 |
225 |
- |
24 |
156 |
| ATSC |
156 |
309 |
254 |
- |
24 |
165 |
| IEEE 802.16-2004 WirelessMAN SCa |
163 |
317 |
266 |
- |
37 |
155 |
| IEEE 802.16-2004 WirelessMAN SC |
1324 |
2639 |
533 |
- |
38 |
66 |
1. Performance and utilization characteristics are generated using LFXP20E-5F256C, with Lattice ispLEVER 7.2 SP1 software. When using this IP core in a different density, speed, or grade within the LatticeXP family, performance and utilization may vary.
Ordering Information
| Family |
Part Number |
| LatticeECP3 |
RSENC-DBLK-E3-U4 |
| LatticeECP2M |
RSENC-DBLK-PM-U4 |
| LatticeECP2 |
RSENC-DBLK-P2-U4 |
| LatticeECP/EC |
RSENC-DBLK-E2-U4 |
| LatticeSC |
RSENC-DBLK-SC-U4 |
| LatticeXP2 |
RSENC-DBLK-X2-U4 |
| LatticeXP |
RSENC-DBLK-XM-U4 |
IP Express Version: 4.3 Evaluate: To download a full evaluation version of this IP, go to the Lattice IP Server tab in the IPexpress Main Window. All ispLeverCORE IP cores and modules available for download are visible on this tab. Purchase: To find out how to purchase the IP Core, please contact your local Lattice Sales Office.
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