Block Convolutional Encoder Page 1 of 3 Home > Products > Intellectual Property > Lattice IP Cores > Block Convolutional Encoder Block Convolutional Encoder Overview Convolutional encoding is a process of adding redundancy to a signal stream to provide error correction capability. The figure below shows a digital communication system using the Convolutional Encoder. The digital data stream (such as voice, image or any packetized data) is first convolutionally encoded, then modulated and finally transmitted through a channel. Lattice's Block Convolutional Encoder IP core is a parameterizable core for convolutional encoding of continuous or burst input data streams. The core allows different code rates and constraint lengths and supports puncturing. It can operate in continuous or block mode, whichever is required by the channel. In block mode, either Zero Flushing or Tail Biting codes can be generated. All the configurable parameters, including operation mode, termination mode, generator polynomials, code rate, and puncture pattern, can be defined by the user to suit the needs of the application. The code rate and the puncture pattern can also be varied through the input ports dynamically, providing further flexibility for the IP usage. Lattice's Block Convolutional Encoder IP core is compatible with many networking and wireless standards that use convolutional encoding. Features Compatible with the following standards: IEEE 802.16-2004, IEEE 802.11a, 3GPP, 3GPP2 and DVB-S Supports both continuous and block encoding Variable constraint length from 3 to 9 Supports both Zero Flushing and Tail Biting termination modes Supports both internal and external zero padding in Zero Flushing mode Supports both internal and external tail adding in Tail Biting mode Supports a wide range of programmable code rates (input_rate/output_rate) User defined generator polynomials Output puncturing with unrestricted, user programmable puncture patterns Supports dynamic puncturing mode, in which both the code rate and puncture patterns can be varied through ports Punctured code rate can be programmed to k/n, where k can be from 2 to 12 and n can be from k+1 to 2k-1; additionally, rate 1/2 is supported in dynamic puncture mode Handshake signals to support breaks in data stream or encoder busy conditions Performance and Resource Utilization 1 LatticeECP3 IPexpress User-Configurable Mode SLICEs LUTs Registers sysMEM EBRs I/Os fMAX (MHz) Config 1 41 44 48 - 13 482 http://www.latticesemi.com/products/intellectualproperty/ipcores/blockconvolutionalencod... 10/6/2011 Block Convolutional Encoder Page 2 of 3 IPexpress User-Configurable Mode SLICEs LUTs Registers sysMEM EBRs I/Os fMAX (MHz) Config 2 24 25 34 - 12 500 Config 3 9 6 16 - 7 500 Config 4 108 136 131 - 30 346 Config 5 40 45 53 - 8 435 1. Performance and utilization data are generated targeting an LFE3-95E-8FN672CES device using Lattice Diamond 1.0 and Synplify Pro D-2009.12L-1 software. Performance may vary when using a different software version or targeting a different device density or speed grade within the LatticeECP3 family. 1 LatticeECP2M IPexpress User-Configurable Mode SLICEs LUTs Registers sysMEM EBRs I/Os fMAX (MHz) Config 1 45 44 48 - 13 466 Config 2 25 25 34 - 12 509 Config 3 9 6 16 - 7 883 Config 4 116 141 131 - 30 352 Config 5 43 45 53 - 8 504 1. Performance and utilization data are generated targeting an LFE2M/S35E-7F484C device using Lattice Diamond 1.0 and Synplify Pro D -2009.12L-1 software. Performance may vary when using a different software version or targeting a different device density or speed grade within the LatticeECP2M family. 1 LatticeECP2 IPexpress User-Configurable Mode SLICEs LUTs Registers sysMEM EBRs I/Os fMAX (MHz) Config 1 44 42 48 - 13 404 Config 2 24 25 34 - 12 372 Config 3 9 6 16 - 7 563 Config 4 119 143 131 - 30 278 Config 5 43 46 53 - 8 397 1. Performance and utilization data are generated targeting an LFE2-50E-7F672C device using Lattice Diamond 1.0 and Synplify Pro D2009.12L-1 software. Performance may vary when using a different software version or targeting a different device density or speed grade within the LatticeECP2/ECP2S family. LatticeECP/EC 1 IPexpress User-Configurable Mode SLICEs LUTs Registers sysMEM EBRs I/Os fMAX (MHz) Config 1 44 44 48 - 13 404 Config 2 24 25 34 - 12 372 Config 3 9 6 16 - 7 563 Config 4 119 143 131 - 30 278 Config 5 43 46 53 - 8 397 1. Performance and utilization data are generated targeting an LFEC/P20E-5F672C device using Lattice Diamond 1.0 and Synplify Pro D2009.12L-1 software. Performance may vary when using a different software version or targeting a different device density or speed grade within the LatticeECP/EC family. LatticeSC 1 IPexpress User-Configurable Mode SLICEs LUTs Registers sysMEM EBRs I/Os fMAX (MHz) Config 1 41 42 48 - 13 400 http://www.latticesemi.com/products/intellectualproperty/ipcores/blockconvolutionalencod... 10/6/2011 Block Convolutional Encoder Page 3 of 3 IPexpress User-Configurable Mode SLICEs LUTs Registers sysMEM EBRs I/Os fMAX (MHz) Config 2 24 24 34 - 12 400 Config 3 9 6 16 - 7 400 Config 4 115 146 131 - 30 392 Config 5 40 44 53 - 8 400 1. Performance and utilization data are generated targeting an LFSC/M3GA25E-7F900C device using Lattice Diamond 1.0 and Synplify Pro D-2009.12L-1 software. Performance may vary when using a different software version or targeting a different device density or speed grade within the LatticeSC/SCM family. 1 LatticeXP2 IPexpress User-Configurable Mode SLICEs LUTs Registers sysMEM EBRs I/Os fMAX (MHz) Config 1 45 44 48 - 13 481 Config 2 25 25 34 - 12 491 Config 3 9 6 16 - 7 647 Config 4 116 141 131 - 30 298 Config 5 43 47 53 - 8 495 1. Performance and utilization data are generated targeting an LFXP2-17E-7F484C device using Lattice Diamond 1.0 and Synplify Pro D2009.12L-1 software. Performance may vary when using a different software version or targeting a different device density or speed grade within the LatticeXP2 family. 1 LatticeXP IPexpress User-Configurable Mode SLICEs LUTs Registers sysMEM EBRs I/Os fMAX (MHz) Config 1 44 42 48 - 13 327 Config 2 24 25 34 - 12 361 Config 3 9 6 16 - 7 589 Config 4 115 127 131 - 30 250 Config 5 40 46 53 - 8 363 1. Performance and utilization data are generated targeting an LFXP20E-5F484C device using Lattice Diamond 1.0 and Synplify Pro D2009.12L-1 software. Performance may vary when using a different software version or targeting a different device density or speed grade within the LatticeXP family. Ordering Information Family LatticeECP3 LatticeECP2M LatticeECP2 LatticeECP/EC LatticeSC LatticeXP2 LatticeXP Part Numbers CONV-BLK-E3-U3 CONV-BLK-PM-U3 CONV-BLK-P2-U3 CONV-BLK-E2-U3 CONV-BLK-SC-U3 CONV-BLK-X2-U3 CONV-BLK-XM-U3 IP Version: 3.6 Evaluate: To download a full evaluation version of this IP, go to the IPexpress tool and click the IP Server button in the toolbar. All LatticeCORE IP cores and modules available for download will be visible. For more information on viewing/downloading IP please read the IP Express Quick Start Guide. Purchase: To find out how to purchase the IP Core, please contact your local Lattice Sales Office. http://www.latticesemi.com/products/intellectualproperty/ipcores/blockconvolutionalencod... 10/6/2011