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STEL5269+512

Intel
Part Number STEL5269+512
Manufacturer Intel
Description Convolutional Encoder Viterbi Decoder
Published May 26, 2006
Detailed Description www.DataSheet4U.com STEL-5269+512 Data Sheet STEL-5269+512 Convolutional Encoder Viterbi Decoder www.DataSheet4U.com ...
Datasheet PDF File STEL5269+512 PDF File

STEL5269+512
STEL5269+512

Overview
www.
DataSheet4U.
com STEL-5269+512 Data Sheet STEL-5269+512 Convolutional Encoder Viterbi Decoder www.
DataSheet4U.
com R www.
DataSheet4U.
com FEATURES s CONSTRAINT LENGTH 7 s CODING RATES 1/2 AND 1/3 s THREE BIT SOFT-DECISION INPUTS IN SIGNED MAGNITUDE OR 2’s COMPLEMENT FORMAT s CODING GAIN OF 6.
0 dB (AT 10–5 BER, RATE 1/3) s INDUSTRY STANDARD POLYNOMIALS G1 = 1718, G2 = 1338, G3 = 1458, s 512 Kbps DATA RATE (0° to 70° C) s CODING GAIN OF 5.
2 dB (AT 10-5 BER, RATE 1/2) s LOW POWER CONSUMPTION s 44 PIN PLCC AND CLDCC PACKAGES s AVAILABLE TO MIL-STD 883C BLOCK DIAGRAM DATACLK DATAIN Q1 7-BIT SHIFT REGISTER Q2 Q3 Q4 Q5 Q6 Q7 ENCODER SECTION OSY MB "INV G2" SCRAMBLER AND 3:1 MUX D Q LATCH SEL A, B MODE ERATE ENLATCH RESET SCRAMBL OCLK ICLK DRDY ACK DRATE SYNC0 SYNC1 3 3 3 2 MODE SELECT AND CONTROL 2 SELECT (TO ALL REGS.
) DECODER SECTION ADDRESS SEQUENCER AND CONTROL LOGIC STATE-METRIC RAM TRELLIS RAM ADDR G1D 2-0 G2D 2-0 G3D 2-0 SM2C "INV G2" DESCRAMBLER, BUFFER REG.
& MUX.
DAT A BRANCH METRIC AND ADD-COMPARESELECT LOGIC PATH HISTORY AND AUTO NODE-SYNC LOGIC DOUT SYNC SST0 SST1 MIS 3 www.
DataSheet4U.
com THRESH STEL-5269+512 2 www.
DataSheet4U.
com FUNCTIONAL DESCRIPTION Convolutional Encoding and Viterbi Decoding are used to provide forward error correction (FEC) which improves digital communication performance over a noisy link.
In satellite communication systems where transmitter power is limited, FEC techniques can reduce the required transmission power.
The STEL-5269+512 is a specialized product designed to perform this specific communications related function.
The encoder creates a stream of symbols which are transmitted at 2 (Rate 1/2) or 3 (Rate 1/3) times the information rate.
This encoding introduces a high degree of redundancy which enables accurate decoding of information despite a high symbol error rate resulting from a noisy link.
The STEL-5269+512 incorporates all the memories required to perform these functions.
The STEL5269+...


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