Recent questions tagged physical-layer

659
views
0 answers
0 votes
What is the syllabus for physical layer(computer networks), is reading 4th(digital transmission) and 5th chapter(multiplexing and spreading) of data communication and networking by forouzan 4th edition enough?
511
views
0 answers
0 votes
Data Encoding and Modulation. How binary 0 and one are encoded over OC-48, OC-192, OC-256 and OC-768 cables. Which modulation techniques are used by these ... techniques used to get 10 Gbps, 14.271 Gbps and 40 Gbps data transfer rates.
3.6k
views
1 answers
0 votes
The period of a signal is 100 ms. Its frequency is ____$100^3$ Hertz$10^{-2}$ KHz$10^{-3}$ KHz$10^5$ Hertz
617
views
0 answers
0 votes
To transmit 100 digitized voice channel using a channel of 20 KHz. what should be the ratio of bits/hertz if we use no guard band. assume the human voice normally contains frequencies from 0 to 4000 hz and assume 8 bits per sample.
969
views
1 answers
0 votes
A researcher wishes to digitally record analog sounds for testing animal hearing with frequency of upto 100[khz]. Use Shannon's formula to find minimum signal to ... db!) required to sustain the given data rate over a 500khz radio channel.
1.2k
views
1 answers
1 votes
Quadrature Amplitude Modulation means changing bothFrequency and phase of the carrierFrequency and Amplitude of the carrierAmplitude and phase of the carrierAmplitude and Wavelength of the carrier
5.1k
views
1 answers
0 votes
How much bandwidth is there in $1$ micron of spectrum at a wavelength of $1$ micron ?$300$ MHz$3$ GHz$300$ THz$30$ KHz
2.4k
views
2 answers
1 votes
If carrier modulated by a digital bit stream, has one one of the possible phase of $0, 90, 180$ and $270$ degrees, then modulation calledBPSKQPSKQAMMSK
10.2k
views
1 answers
1 votes
An analog signal carries 4 bits in each signal unit. If 1000 signal units are sent per second, then baud rate and bit rate of the signal are _____ and ... bps2000 bauds/sec & 1000 bps1000 bauds/sec & 500 bps1000 bauds/sec & 4000 bps
2.7k
views
1 answers
2 votes
Which one of the following media is multidrop?Shielded Twisted pair cableUnshielded Twisted pair cableThick Coaxial cableFiber Optic cable
To see more, click for the full list of questions or popular tags.