全等
发表于 2025-3-26 23:35:17
Principles of Convolutional and Trellis Codes,for later chapters. For detailed treatments of these codes see Viterbi and Omura , Schlegel , and Johannesson and Zigangirov . First, a tool for analyzing linear sequential circuits called the Huffman .-transform is presented. It is essentially the same as the .-transform used in the dig
价值在贬值
发表于 2025-3-27 04:59:39
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AWRY
发表于 2025-3-27 06:44:23
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茁壮成长
发表于 2025-3-27 10:50:01
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fertilizer
发表于 2025-3-27 14:04:07
Mapping Data to Channel Symbol Frames by a Modulus Encoder,ding in Recommendation V.34. Many committee participants were not convinced this was the best approach. They felt it was conceptually and computationally too complex. AT&T proposed an alternative called the “fractional bit rate modulus converter” coupled with the Wei 16-state 4D code . Short
Agility
发表于 2025-3-27 19:21:52
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异教徒
发表于 2025-3-28 01:15:00
The Four Dimensional Constellation Used by ITU-T V.34 Modems,tion selected from a four-dimensional (4D) lattice. This chapter presents the mathematical structure of this 4D constellation and describes how input bits are mapped to constellation points. The constellation is formed by partitioning the 2D constellation into 8 subsets and then combining pairs of 2
Adherent
发表于 2025-3-28 04:31:35
The Combined Precoding and Trellis Coding Scheme for V.34,hown in Figure 10.1. The combined scheme was invented very late in the ITU-T V.34 study committee deliberations. The original idea was presented by R. Laroia during a June 1993 TIA meeting. It was quickly simplified and improved by Bill Betts and R. Laroia of AT&T and, independently, by Paul Co
Strength
发表于 2025-3-28 08:28:32
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压舱物
发表于 2025-3-28 11:58:10
Book 2002al for researchers in modulation and coding for voiceband telephone line modems; signal constellation design; nonlinear precoding for modems; and trellis coding..The author presents the theory behind the new modulation and coding techniques included in ITU-T Recommendation V.34. Topics discussed inc