载波 - 维基百科，自由的百科全书
载波（carrier wave）是指被调制以传输信号的波形，一般为正弦波。 一般要求正弦载波的 频率 远远高于调制信号的 带宽 ，否则会发生混叠，使传输信号失真。
Carrier wave - Wikipedia
In telecommunications, a carrier wave, carrier signal, or just carrier, is a periodic waveform (usually sinusoidal) that carries no information that has one or more of its properties modified (the called modulation) by an information-bearing signal (called the message signal or modulation signal) for the purpose of conveying information.
IQ Sampling — PySDR: A Guide to SDR and DSP using Python
In this chapter we introduce a concept called IQ sampling, a.k.a. complex sampling or quadrature sampling. We also cover Nyquist sampling, complex numbers, RF carriers, downconversion, and power spectral density. IQ sampling is the form of sampling that an SDR performs, as well as many digital receivers (and transmitters).
rf - What is the purpose of a carrier signal in communication ...
2021年12月10日 · • "Mixing" a carrier wave with a base-band audio signal, repositions the audio around the carrier in the upper RF spectrum. • Once "mixed", the audio no longer appears at the base-band of the spectrum
Signal Modulation with Carrier Wave? - Electrical Engineering …
2022年5月27日 · For your first question, FM means frequency modulation of the carrier wave. For a zero modulating signal the carrier wave is at the nominal frequency. For minimum and maximum modulating signal, the carrier frequency deviates by the allocated bandwidth of the signal, for example FM radio modulates the carrier by +/- 75 kHz.
Carrier Wave Explained: Key to Modern Wireless Communication
2024年8月13日 · In digital, voice calls are sampled, compressed, and sent on a carrier wave. This helps everyone hear each other clearly. To sum up, knowing about carrier waves and modulation is crucial. It greatly improves understanding of both analog and digital communication systems. Carrier waves are key in wireless communication.
Carrier Signal - Network Encyclopedia
2020年12月9日 · Carrier Signal (or Carrier Wave) is an alternating electromagnetic signal with a steady frequency upon which information is superimposed by some form of modulation. The specific frequency at which the carrier signal runs is called the …
voltage - Whats the reason for triangular carrier PWM - Electrical ...
2015年3月3日 · To understand why a sawtooth-carrier PWM adds harmonic distortion, consider the effect of modulating a low-frequency triangle wave using one. Assume the falling edges of the PWM wave occur at a fixed frequency (the same principles would apply if the rising edges did so).
PWM Timing and Waveform Generator (Three-phase, Two-level)
Wave-sampling method. The sampling mode determines whether the block samples the modulation waveform when the waves intersect or when the carrier wave is at one or both of its boundary conditions.
Carrier wave - (Signal Processing) - Vocab, Definition ... - Fiveable
A carrier wave is a high-frequency electromagnetic wave that is modulated with an input signal to transmit information. It serves as the medium through which data, audio, or video signals are carried over various communication channels.