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STEL2060C

Intel
Part Number STEL2060C
Manufacturer Intel
Description 45Mbps Viterbi Decoder
Published Dec 18, 2007
Detailed Description www.DataSheet4U.com STEL-2060C/CR Data Sheet STEL-2060C/CR 45 Mbps Viterbi Decoder R www.DataSheet4U.com FEATURES s...
Datasheet PDF File STEL2060C PDF File

STEL2060C
STEL2060C

Overview
www.
DataSheet4U.
com STEL-2060C/CR Data Sheet STEL-2060C/CR 45 Mbps Viterbi Decoder R www.
DataSheet4U.
com FEATURES s 45 Mbps Operating Rate s Constraint Length K = 7 G1 = 1718 G2 = 1338 FUNCTIONAL DESCRIPTION Convolutional encoding and Viterbi decoding are used to provide forward error correction (FEC) which improves digital communication performance over a noisy link.
The STEL-2060C is a specialized product designed to perform this specific communications related function.
At the encoder a stream of symbols is created which introduces a high degree of redundancy.
This enables accurate decoding of the information despite a high symbol error rate resulting from an impaired communications link.
The STEL-2060C contains a K = 7 Viterbi Decoder.
The data inputs can be in offset binary or offset signed-magnitude formats, with 3-bit soft decision.
Auto node sync is provided for applications where symbol uncertainty can occur.
Rate 2 /3, 3/4, 4/5, 5/6, 6/7 and 7/8 punctured signals can be decoded, as well as non-punctured, Rate 1/2, signals.
The polynomials and puncturing patterns used are industry standards.
Depuncturing logic is incorporated into the decoder to provide automatic depuncturing of received data at rates 2/3, 3/4 and 7/8 when the puncturing patterns supported by the device are used.
A BER monitor is also provided in the device, along with a circuit for computing the mean value of the BER over an extended period.
These circuits operate with punctured codes as well as unpunctured.
The STEL-2060C incorporates a descrambler for signals scrambled with the “Invert G2” algorithm.
(With this method the G2 symbols are logically inverted at the encoder.
This provides a very effective level of scrambling for the purpose of avoiding long strings of ones or zeroes in the transmitted signal using BPSK modulation.
) s s s s s s s s s s s Multiple Rates: Rate 1/2 as well as Punctured codes at Rates 2/3 through 7/8 Internal Depuncturing Capability at Rates 2 /3, 3/4 and...


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