Schropp R.E., Carius R., Beaucarne G.'s Amorphous Silicon, Microcrystalline Silicon, and Thin-Film PDF
By Schropp R.E., Carius R., Beaucarne G.
Skinny - movie sun mobile applied sciences in keeping with Si with a thickness of lower than a fewmicrometers mix the low - price strength of skinny - movie applied sciences with the advantagesof Si as an abundantly on hand aspect within the earth's crust and a with no trouble manufac -turable ma te rial for photovoltaics (PVs). lately, numerous applied sciences have beendeveloped that promise to take the in line with shape ance of skinny - movie silicon PVs well past thatof the at present verified amorphous Si PV expertise. skinny - movie silicon, like no otherthin - movie ma te rial, is especially potent in tandem and triple - junction sun cells. The researchand improvement on skinny crystalline silicon on international substrates should be divided intotwo assorted routes: a low - temperature path appropriate with average go with the flow glass or evenplastic substrates, and a excessive - temperature path (☻600♥C). This ar ticle stories the ma te -rial houses and technological demanding situations of the several skinny - movie silicon PV ma te rials.
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One major challenge in applying turbo/LDPC codes to hard disk drives is how to achieve 10−15 type corrected bit error rate (BER). Turbo codes suffer from a phenomenon known as “error floor”. Due to a small number of codewords with low weight, the BER versus SNR performance curves often exhibit a region with small slope at BER about 10−6 . In this region, increasing SNRs bring only small improvements in BER. An outer ECC such as RS code may still be required to handle the residual errors after the turbo/LDPC decoder.
32 Hongwei Song and B. V. K. 6dB to achieve its capacity as indicated by the arrow in Fig. 10. The effect of interleaver size on the BER performance for the EPR4 channel concatenated with the rate 8/9 single convolutional code is shown in Fig. 11. The precoder 1/(1 ⊕ D2 ) is used to achieve the recursive property. Simulated results are shown for four interleaver sizes of N =108, 1125, 4608 and 11250. Significant improvements are observed by increasing interleaver size from N =108 to N =4608. Small performance gain is achieved in the cliff region by further increasing interleaver size from N =4608 to N =11250; however, the error floor is lowered significantly.
A suboptimal decoding of a parity coded system begins with the detection of recorded bits using the Viterbi algorithm matched to the PR channel only. ”) is employed to correct a specified number of the most likely error events at the output of the Viterbi detector by exploiting the parity information in the incoming sequence. The post processor produces the final estimate of the PR channel input sequence. This sequence is passed to the modulation decoder that delivers estimates of the modulation encoder input to the RS 2 Iterative Codes in Magnetic Storage Systems 19 decoder.
Amorphous Silicon, Microcrystalline Silicon, and Thin-Film Polycrystalline Silicon by Schropp R.E., Carius R., Beaucarne G.
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