parity check


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parity check

[′par·əd·ē ‚chek]
(computer science)
References in periodicals archive ?
Then, we modify the original CPM-RID algorithm by directly dividing the parity check matrix into several submatrices, which can reduce the decoding delay and increase the convergence rate by adapting a certain decoding scheme, like serial mechanism.
If [H.sub.mn] = 1, only if variable n participates in the mth parity check constraint, then check node m is connected to variable node n.
Low Density Parity Check (LDPC) codes have an (n, k) defined by m x n parity check matrix(PCM)[24], the majority of whose entries are 0.
where M = [I|1] is a parity check matrix for a binary repetition code, and the quotient is a folded cube;
In (1), H is the parity check matrix, [C.sub.r] is a block of received code, and [n.sub.r] is the number of syndrome elements corresponding to H.
The RivieraWaves Wi-Fi IP platforms support a host of advanced features, including Beam Forming, Multi-User MIMO (Wave 2), Space-Time Block Code (STBC), Low Density Parity Check (LDPC), Dynamic Bandwidth Management, Wi-Fi Direct and WAPI.
Du and Zhang [12] investigated a cooperative strategy based on parity check network coding.
It occupies only 1RU space and monitors input RF modulation parameters and signal performance metrics including Modulation Error Ratio (MER) and Low Density Parity Check (LDPC) status.
The other family of decoding algorithms is iterative decoding algorithms, such as turbo decoding with component MAP decoders for each component code, and the sum product algorithm (SPA) [29] or its lower complexity approximation, min-sum decoding [30] for low density parity check codes (LDPCs).
Note that the parity check vector recognition procedure uses the GJETP algorithm too, so the proposed rearranged steps are also applied before each GJETP processing when recognizing the parity check vectors.
Parity check code is one of the simplest error detecting codes that can be used to detect single bit error and odd number of bit flips [25].
And the parity check matrix can also be determined, and then coding is implemented.