AllWi-Fistandards use subcarriers as part of OFDM. In this use, there is no signal that is directly encoded on the carrier frequency. All signals -- orsymbolsas they are called in this context -- are first mixed with a subcarrier, which is then all mixed with the carrier frequency for...
Another use case for modulation is radio transmission. A carrier signal that has higher frequencies typically has a shorter wavelength to enable efficient transmission and reception. The optimal antenna size is one-half or one-quarter of a wavelength, so an audio frequency of 3000 Hz needs a wav...
In this equation,the information-carrying component in the message signal is amplitude (A), frequency (f0), and phase (ϕ), which can be part of the signal individually or in combination. Wireless communication systems can use single carrier or multiple carrier modulation schemes to transmit th...
What is the modulation index of an FM signal having a carrier swing of... 01:42 A lossless coaxial cable has a capacitance of 7 xx 10^(-11)F and indu... 01:31 The velocity factor of a transmission line is 0.62 .Calculate dielect... 01:02 The tuned circuit the Oscillator in a ...
The PXIe-5842 Vector Signal Transceiver offers continuous frequency coverage from 30 MHz up to 26.5 GHz and up to 2 GHz instantaneous RF bandwidth. See how you can prepare for the requirements of tomorrow’s RF and wireless technologies with the PXIe-5842. ...
Modulation is the use of one electrical signal to “control” a primary variable of another. For example, if an audio signal voltage is used to control the “amplitude” of a carrier signal, the result is amplitude modulation.It is important that you do not confuse “mixing” with “modulat...
<p><strong>Step-by-Step Solution:</strong></p><p>1. <strong>Definition of Signal</strong>: A signal is defined as a physical quantity that varies with time and can be represented in terms of voltage, current, or electromagnetic waves. </p><p>2. <strong>R
What Does Modulation Mean? Modulation is a process through which audio, video, image or text information is added to an electrical or optical carrier signal to be transmitted over a telecommunication or electronic medium. Modulation enables the transfer of information on an electrical signal to a ...
Using the 16-QAM technique, it is possible to modulate both the amplitude as well as the phase of the carrier signal unlike other lower order digital modulation schemes such as BPSK where only phase modulation is possible. As a result, it also supports a relatively larger amount of data to...
On a WLAN, users require mobile communication. The signal coverage of a singleAP, however, is limited. As such, users often move from the coverage area of an AP to that of another AP. To prevent network interruptions while users move between different APs, the concept of WLANroamingis intr...