| 单词 | 16-QAM |
| 释义 | 16-QAM A variation on the quadrature amplitude modulation (QAM) signal modulation scheme that splits the carrier into two waveforms that are 90° out of phase, and specifies two possible amplitude values for each of eight phase shifts separated by 45° (0°, 45°, 90°, 135°, 180°, 225°, 270°, and 315°).Thereby, each symbol carries one of 16 possible signal combinations and represents four bits (24 = 16). At a signaling rate of 2400 baud, for example, this quadbit modulation scheme yields a transmission rate of 9600 bps. 16-QAM is specified in the ITU-T V.29 Recommendation and the IEEE 802.11a (Wi-Fi5) standard. See also 802.11a, amplitude, carrier, ITU-T, modulation, QAM, quadbit, signal, signaling rate, symbol, transmission rate, V series, and waveform. |
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