| 单词 | DOCSIS (Data Over Cable Service Interface Specification) |
| 释义 | DOCSIS (Data Over Cable Service Interface Specification) use of the quadrature phase shift keying (QPSK) modulation technique. DOCSIS 1.1 specifies 16-QAM, which roughly doubles the data rate, and doubles the channel width. DOSCIS 2.0 further increases the upstream rate by again doubling the channel width, and using either time division multiple access (TDMA) in combination with 64-QAM or synchronous code division multiple access (S-CDMA) in combination with 128-QAM trellis-coded modulation (TCM). See also 128-QAM, 16-QAM, 256-QAM, 64-QAM, always on, asymmetric, byte, CableLabs, cable modem, CMTS, coaxial cable, compression, downstream, encapsulate, FDX, headend, HFC, modulation, MPEG-2, noise, packet, PSTN, QAM, QPSK, S-CDMA, set-top box, signaling rate, symbol, and upstream. |
| 随便看 |
|
科学参考收录了5291条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。