| 单词 | carrier signal |
| 释义 | > as lemmascarrier signal 15. Telecommunications. More fully carrier signal, carrier wave. An electromagnetic wave or alternating electrical signal modulated in amplitude or frequency to convey sound, speech, information, etc. ΘΚΠ society > communication > telecommunication > [noun] > signal > frequency or band of frequencies > carrier carrier1911 suppressed carrier1921 subcarrier1953 the world > matter > physics > electromagnetic radiation > electronics > electronic phenomena > [noun] > waveform > types of waveform > radio waves carrier1911 ground wave1927 1911 Trans. Amer. Inst. Electr. Engineers 30 ii. 1666 The transmission of intelligible speech by means of a high frequency alternating current carrier, can also be accomplished on a simple telephone circuit consisting of wires. 1921 Electrician 15 Apr. 452/1 By the term ‘demodulation’ is meant the process of reproducing the original low frequency modulating wave from the carrier wave upon which it has been impressed. 1926 R. Bown et al. Some Stud. Radio Broadcast Transmission (Bell Telephone Lab.) 16 The tone was interrupted before modulation took place, and..the amplitude of the carrier signal is not affected. 1956 Spaceflight 1 27/2 A data input circuit..codes all information picked up by the satellite's instruments, and a modulator..superimposes the coded data on a carrier signal. 2000 P. Scherz Pract. Electronics for Inventors ix. 267 In radio circuits, high-frequency sinusoidal oscillators are used to generate carrier waves on which information can be encoded via modulation. 2013 IEEE Trans. Communications 61 3231/2 An unmodulated carrier drives a single antenna (or a phased array) with multiple reflectors and switches. < as lemmas |
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