Lte Dl Channel Encoder Xmp023
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LTE DL Channel Encoder v2.0 XMP023 April 24, 2009
Product Brief
Introduction The Xilinx® LTE DL Channel Encoder core provides designers with an LTE Downlink Channel Encoding block for the 3GPP TS 36.212 v8.4.0 Multiplexing and channel coding specification.
Features
•
•
•
Available for Virtex®-6, Virtex-5, Virtex-4, Spartan®-6, and Spartan-3A DSP FPGAs
•
Channel coding for 3GPP TS 36.212 supports: DL-SCH, PCH, MCH, BCH, CFI, HI, and DCI
•
Bit-accurate C model available
•
Fully optimized for speed and area
•
Fully synchronous design using a single clock
•
For use with the Xilinx CORE Generator™ v11.1 and higher
CRC ♦
24-bit CRC applied to DL-SCH, PCH, and MCH transport blocks
♦
16-bit CRC applied to BCH and DCI code blocks (with additional scrambling on parity bits)
Segmentation ♦
•
Overview
•
The LTE DL Channel Encoder core provides a channel encoding solution for the 3GPP 36.212 specification. Figure 1 and Figure 2 illustrate the main blocks in the LTE encoding chain for the two main channel types that are supported by the core. The architecture has been designed to provide efficient use of the FPGA while also offering a low bandwidth processor interface to reduce system-level overhead. Timing critical operations are performed by the FPGA.
Encoding ♦
Turbo code applied to DL-SCH, PCH, and MCH data
♦
Convolutional code applied to BCH and DCI data (single code block)
Rate Matching ♦
•
Code block segmentation applied to DL-SCH, PCH, and MCH transport blocks (i.e., data that are turbo encoded), with an additional 24-bit CRC computed on each code-block (in cases where segmentation produces more than one code-block).
Applied on a code-block basis to DL-SCH, PCH, MCH, BCH, and DCI data. This function performs appropriate puncturing according to the AMC parameters and redundancy version.
Control Format Indicator Generation ♦
The HI or CFI coded outputs are generated according to the type indicated from the control signaling from the MAC layer.
The interface to the core can be easily attached to any bus-based system. The memory mapped interface allows for simple integration and validation within the system. Data is processed sequentially on a transport block basis for each of the two main channel types, where the term “transport block“ is used to describe a block of data originating from the MAC layer. Specific processing is applied depending on the type of input block, which is indicated as part of the control signaling provided by the MAC layer. The following functions are supported by the core: © 2008-2009 Xilinx, Inc., XILINX, the Xilinx logo, Virtex, Spartan, ISE and other designated brands included herein are trademarks of Xilinx in the United States and other countries. All other trademarks are the property of their respective owners..
XMP023 April 24, 2009 Product Brief
www.xilinx.com
1
LTE DL Channel Encoder v2.0
Control and Broadcast Channel Processing X-Ref Target - Figure 1
PBCH and PDCCH
CRC16 and Masking
Tail Biting Convolution Encoder
Rate Match CCH
ds699_01_072508
Figure 1: Downlink Channel Processing for BCH and DCI - CCH Channel Stream
Shared, Paging, and Multicast Channel Processing X-Ref Target - Figure 2
PDSCH, PMCH, and PPCH
CRC24
Segment
Turbo Encoder
Rate Match SCH
ds699_02_072508
Figure 2: Downlink Channel Processing for DL-SCH, PCH and MCH - SCH Channel Stream
Support Xilinx provides technical support at www.xilinx.com/support for this LogiCORE product when used as described in the product documentation. Xilinx cannot guarantee timing, functionality, or support of product if implemented in devices that are not defined in the documentation, if customized beyond that allowed in the product documentation, or if changes are made to any section of the design labeled DO NOT MODIFY. Refer to the IP Release Notes Guide (XTP025) for further information on this core. There will be a link to all the DSP IP and then to the relevant core being designed with. For each core, there is a master Answer Record that contains the Release Notes and Known Issues list for the core being used. The following information is listed for each version of the core: •
New Features
•
Bug Fixes
•
Known Issues
Ordering Information The LTE DL Channel Encoder core is provided under the SignOnce IP Site License and can be generated using the Xilinx® CORE Generator v11.1 or higher. The CORE Generator software is shipped with Xilinx ISE® Foundation™ Series Development software. To access the full functionality of the core, including simulation and FPGA bitstream generation, a full license must be obtained from Xilinx. For more information, visit the LTE DL Channel Encoder product page. 2
www.xilinx.com
XMP023 April 24, 2009 Product Brief
LTE DL Channel Encoder v2.0
Contact your local Xilinx sales representative for pricing and availability of additional Xilinx® LogiCORE modules and software. Information about additional Xilinx® LogiCORE modules is available on the Xilinx IP Center. France Telecom, for itself and certain other parties, claims certain intellectual property rights covering Turbo Codes technology, and has decided to license these rights under a licensing program called the Turbo Codes Licensing Program. Supply of this IP core does not convey a license nor imply any right to use any Turbo Codes patents owned by France Telecom, TDF or GET. Please contact France Telecom for information about its Turbo Codes Licensing Program at the following address: France Telecom R&D, VAT/TURBOCODES 38, rue du Général Leclerc, 92794 Issy Moulineaux, Cedex 9, France.
Revision History The following table shows the revision history for this document: Date
Version
Description of Revisions
09/19/08
1.0
Initial Xilinx release.
04/24/09
1.5
Added support for Spartan-6 and Virtex-6 device families.
Notice of Disclaimer Xilinx is providing this product documentation, hereinafter “Information,” to you “AS IS” with no warranty of any kind, express or implied. Xilinx makes no representation that the Information, or any particular implementation thereof, is free from any claims of infringement. You are responsible for obtaining any rights you may require for any implementation based on the Information. All specifications are subject to change without notice. XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE INFORMATION OR ANY IMPLEMENTATION BASED THEREON, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF INFRINGEMENT AND ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Except as stated herein, none of the Information may be copied, reproduced, distributed, republished, downloaded, displayed, posted, or transmitted in any form or by any means including, but not limited to, electronic, mechanical, photocopying, recording, or otherwise, without the prior written consent of Xilinx.
XMP023 April 24, 2009 Product Brief
www.xilinx.com
3
Product Brief
Introduction The Xilinx® LTE DL Channel Encoder core provides designers with an LTE Downlink Channel Encoding block for the 3GPP TS 36.212 v8.4.0 Multiplexing and channel coding specification.
Features
•
•
•
Available for Virtex®-6, Virtex-5, Virtex-4, Spartan®-6, and Spartan-3A DSP FPGAs
•
Channel coding for 3GPP TS 36.212 supports: DL-SCH, PCH, MCH, BCH, CFI, HI, and DCI
•
Bit-accurate C model available
•
Fully optimized for speed and area
•
Fully synchronous design using a single clock
•
For use with the Xilinx CORE Generator™ v11.1 and higher
CRC ♦
24-bit CRC applied to DL-SCH, PCH, and MCH transport blocks
♦
16-bit CRC applied to BCH and DCI code blocks (with additional scrambling on parity bits)
Segmentation ♦
•
Overview
•
The LTE DL Channel Encoder core provides a channel encoding solution for the 3GPP 36.212 specification. Figure 1 and Figure 2 illustrate the main blocks in the LTE encoding chain for the two main channel types that are supported by the core. The architecture has been designed to provide efficient use of the FPGA while also offering a low bandwidth processor interface to reduce system-level overhead. Timing critical operations are performed by the FPGA.
Encoding ♦
Turbo code applied to DL-SCH, PCH, and MCH data
♦
Convolutional code applied to BCH and DCI data (single code block)
Rate Matching ♦
•
Code block segmentation applied to DL-SCH, PCH, and MCH transport blocks (i.e., data that are turbo encoded), with an additional 24-bit CRC computed on each code-block (in cases where segmentation produces more than one code-block).
Applied on a code-block basis to DL-SCH, PCH, MCH, BCH, and DCI data. This function performs appropriate puncturing according to the AMC parameters and redundancy version.
Control Format Indicator Generation ♦
The HI or CFI coded outputs are generated according to the type indicated from the control signaling from the MAC layer.
The interface to the core can be easily attached to any bus-based system. The memory mapped interface allows for simple integration and validation within the system. Data is processed sequentially on a transport block basis for each of the two main channel types, where the term “transport block“ is used to describe a block of data originating from the MAC layer. Specific processing is applied depending on the type of input block, which is indicated as part of the control signaling provided by the MAC layer. The following functions are supported by the core: © 2008-2009 Xilinx, Inc., XILINX, the Xilinx logo, Virtex, Spartan, ISE and other designated brands included herein are trademarks of Xilinx in the United States and other countries. All other trademarks are the property of their respective owners..
XMP023 April 24, 2009 Product Brief
www.xilinx.com
1
LTE DL Channel Encoder v2.0
Control and Broadcast Channel Processing X-Ref Target - Figure 1
PBCH and PDCCH
CRC16 and Masking
Tail Biting Convolution Encoder
Rate Match CCH
ds699_01_072508
Figure 1: Downlink Channel Processing for BCH and DCI - CCH Channel Stream
Shared, Paging, and Multicast Channel Processing X-Ref Target - Figure 2
PDSCH, PMCH, and PPCH
CRC24
Segment
Turbo Encoder
Rate Match SCH
ds699_02_072508
Figure 2: Downlink Channel Processing for DL-SCH, PCH and MCH - SCH Channel Stream
Support Xilinx provides technical support at www.xilinx.com/support for this LogiCORE product when used as described in the product documentation. Xilinx cannot guarantee timing, functionality, or support of product if implemented in devices that are not defined in the documentation, if customized beyond that allowed in the product documentation, or if changes are made to any section of the design labeled DO NOT MODIFY. Refer to the IP Release Notes Guide (XTP025) for further information on this core. There will be a link to all the DSP IP and then to the relevant core being designed with. For each core, there is a master Answer Record that contains the Release Notes and Known Issues list for the core being used. The following information is listed for each version of the core: •
New Features
•
Bug Fixes
•
Known Issues
Ordering Information The LTE DL Channel Encoder core is provided under the SignOnce IP Site License and can be generated using the Xilinx® CORE Generator v11.1 or higher. The CORE Generator software is shipped with Xilinx ISE® Foundation™ Series Development software. To access the full functionality of the core, including simulation and FPGA bitstream generation, a full license must be obtained from Xilinx. For more information, visit the LTE DL Channel Encoder product page. 2
www.xilinx.com
XMP023 April 24, 2009 Product Brief
LTE DL Channel Encoder v2.0
Contact your local Xilinx sales representative for pricing and availability of additional Xilinx® LogiCORE modules and software. Information about additional Xilinx® LogiCORE modules is available on the Xilinx IP Center. France Telecom, for itself and certain other parties, claims certain intellectual property rights covering Turbo Codes technology, and has decided to license these rights under a licensing program called the Turbo Codes Licensing Program. Supply of this IP core does not convey a license nor imply any right to use any Turbo Codes patents owned by France Telecom, TDF or GET. Please contact France Telecom for information about its Turbo Codes Licensing Program at the following address: France Telecom R&D, VAT/TURBOCODES 38, rue du Général Leclerc, 92794 Issy Moulineaux, Cedex 9, France.
Revision History The following table shows the revision history for this document: Date
Version
Description of Revisions
09/19/08
1.0
Initial Xilinx release.
04/24/09
1.5
Added support for Spartan-6 and Virtex-6 device families.
Notice of Disclaimer Xilinx is providing this product documentation, hereinafter “Information,” to you “AS IS” with no warranty of any kind, express or implied. Xilinx makes no representation that the Information, or any particular implementation thereof, is free from any claims of infringement. You are responsible for obtaining any rights you may require for any implementation based on the Information. All specifications are subject to change without notice. XILINX EXPRESSLY DISCLAIMS ANY WARRANTY WHATSOEVER WITH RESPECT TO THE ADEQUACY OF THE INFORMATION OR ANY IMPLEMENTATION BASED THEREON, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OR REPRESENTATIONS THAT THIS IMPLEMENTATION IS FREE FROM CLAIMS OF INFRINGEMENT AND ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Except as stated herein, none of the Information may be copied, reproduced, distributed, republished, downloaded, displayed, posted, or transmitted in any form or by any means including, but not limited to, electronic, mechanical, photocopying, recording, or otherwise, without the prior written consent of Xilinx.
XMP023 April 24, 2009 Product Brief
www.xilinx.com
3
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