Target Applications: Digital communications systems, digital audi
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Interleaver/Deinterleaver MegaCore Function
Target Applications:
Digital communications systems, digital audio video broadcast systems, data storage retrieval systems Family: APEX20K FLEX® Ordering Code: PLSM-INLV Vendor:
Features
High-speed data rates: megasamples second (MSPS) Supports block convolutional interleaving algorithms Parameterized symbol width, depth, block length Compatible with discrete, streaming, continuous Reed-Solomon encoders/decoders Optimized APEX FLEX devices Uses internal external memory Generates test vectors Dynamic burst error distribution analyzer
General Description
Innovation Drive Jose, 95134 http://www.altera.com Tel. (408) 544-7000
Interleavers/deinterleavers standard digital signal processing (DSP) functions used many digital communications systems. Applications that store transmit digital data interleavers/deinterleavers enhance performance forward error correction (FEC) systems. Symbol interleavers/deinterleavers mitigate effects burst noise. Typically, these functions needed transport channels that require bit-error ratio (BER). Therefore, interleaving improves efficiency Reed-Solomon encoders/decoders spreading burst errors across several codewords. Altera interleaver/deinterleaver MegaCorefunction uses internal external single-port dual-port RAM. implement single-port using FLEX embedded array blocks (EABs) external device; implement dual-port using APEX embedded system blocks (ESBs), FLEX 10KE EABs, external device. interleaver/deinterleaver MegaCore function operates same frequency range used Reed-Solomon encoders/decoders supports continuous, streaming, discrete modes, making function compatible with Reed-Solomon code. function's MegaWizardPlug-In drastically reduces design creation simulation cycles from several weeks several minutes. wizard generates highly optimized instance custom interleaver/deinterleaver function well MAX+PLUS® Vector File (.vec) that simulate function. example, choosing simple settings, build interleaver function meet pre-defined specifications, such UMTS. addition, implement customized functions specifying parameter values your specific transmission channel requirements.
Functional Description
interleaver/deinterleaver wizard using Quartusor MAX+PLUS MegaWizard Plug-In Manager. After function's parameters, wizard generates customized function that instantiate your design file. Table describes options interleaver/deinterleaver wizard.
Altera Corporation
A-SB-042-01
MegaCore
Interleaver/Deinterleaver MegaCore Function
Table Interleaver/Deinterleaver Wizard Options
Option
Type Number columns Number rows Number branches Unit delay element Direction Memory type
Function
Block convolutional Block Block Convolutional Convolutional Block convolutional Block convolutional
Description
Specifies block convolutional interleaver/deinterleaver. Specifies total length codeword (i.e., data symbol checksum symbol). Specifies maximum number codewords function's memory. Specifies number branches used function. Specifies unit delay each branch function. Specifies interleaver (transmitter) deinterleaver (receiver). Specifies internal external memory. Convolutional interleaving uses synchronous dual-port RAM; block interleaving uses synchronous single-port RAM. internal memory, MegaWizard Plug-In instantiates most optimum ESB/EAB configuration automatically. Specifies width input symbol.
Symbol width
Block convolutional
Figure shows page convolutional interleaver/deinterleaver MegaWizard Plug-In.
Figure Interleaver/Deinterleaver MegaWizard Plug-In
Altera Corporation
Interleaver/Deinterleaver MegaCore Function
Performance
Table shows interleaver/deinterleaver MegaCore function's performance calculated using MAX+PLUS version software.
Table Symbol Interleaver/Deinterleaver Performance
Device Speed Grade
Function
Parameters
Utilization EABs
Performance (MHz)
FLEX 10KE
Convolutional interleaver using FLEX 10KE EABs
Number branches Unit delay element Symbol width bits (digital video broadcast settings) Number columns Number rows Symbol width
Block interleaver using single-port
Innovation Drive Jose, 95134 (408) 544-7000 http://www.altera.com
Copyright 1999 Altera Corporation. Altera, MegaCore, APEX, APEX 20K, MegaWizard, MAX, Quartus, MAX+PLUS, MAX+PLUS FLEX, FLEX 10K, FLEX 10KE trademarks and/or service marks Altera Corporation United States other countries. Other brands products trademarks their respective holders. specifications contained herein subject change without notice. Altera assumes responsibility liability arising application information, product, service described herein except expressly agreed writing Altera Corporation. Altera customers advised obtain latest version device specifications before relying published information before placing orders products services. rights reserved.
Altera Corporation
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