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What is the unique characteristic of convolution code which makes it different from linear block code?
In block codes, information bits are followed by parity bits. In convolution codes, information bits are spread along the sequence. Block codes are memoryless whereas Convolution codes have memory. Convolution codes use small codewords in comparison to block codes, both achieving the same quality.
How many errors can Reed Solomon correct?
16 symbol errors
A Reed-Solomon decoder can correct up to t symbols that contain errors in a codeword, where 2t = n-k. The decoder can correct any 16 symbol errors in the code word: i.e. errors in up to 16 bytes anywhere in the codeword can be automatically corrected.
Is convolutional code systematic?
Convolutional codes are implemented as either systematic or non-systematic codes. Non-systematic convolutional codes can provide better performance under maximum-likelihood (Viterbi) decoding.
Which is the first element of Reed Solomon coding?
In the CD, two layers of Reed–Solomon coding separated by a 28-way convolutional interleaver yields a scheme called Cross-Interleaved Reed–Solomon Coding ( CIRC ). The first element of a CIRC decoder is a relatively weak inner (32,28) Reed–Solomon code, shortened from a (255,251) code with 8-bit symbols.
When to use Reed Solomon and Viterbi decoded coding?
Modern versions of concatenated Reed–Solomon/Viterbi-decoded convolutional coding were and are used on the Mars Pathfinder, Galileo, Mars Exploration Rover and Cassini missions, where they perform within about 1–1.5 dB of the ultimate limit, being the Shannon capacity.
What is the Reed Solomon error correction scheme?
Reed–Solomon coding is a key component of the compact disc. It was the first use of strong error correction coding in a mass-produced consumer product, and DAT and DVD use similar schemes.