Questions tagged [digital-communication]

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6
votes
1answer
128 views

What is Byte Alignment Time in radio communication?

According to this paper, which deals with time synchronization in wireless networks, this kind of delay occurs, however I do not understand its explanation. The paper says the reciever (radio) has to ...
3
votes
0answers
26 views

filter type : bypass or by pass

I am not an expert in the signal processing! I working on a simulation the interpolation ( upsampling and filter). The interpolation process was divided into two stages: stage 1: FIR - filter ( ...
1
vote
1answer
32 views

why can't remove the Image frequency using a band-pass filter?

why can't remove the Image frequency using a band-pass filter? I've been asked to search for the reason why we can't use BPF (band-pass filter) in order to remove the effects of the Image frequency? I'...
1
vote
1answer
94 views

Configuring UART Port to 115200 on Renesas RX130 using Code Generator

Does anyone have insights into configuring UART port on Renesas RX130 microcontroller for a bit rate of 115200? I have successfully configured for a 9600, 19200, and 38400. I can read from the MCU and ...
1
vote
0answers
29 views

How to make a 3-bit full adder using only half adders [closed]

I've been trying to solve this question but I don't know the right answer.
1
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0answers
14 views

Why are ODFM pilot tones repeated?

Why are pilot tones repeated so much in OFDM? I understand the pilot tones are used for synchronization, ensuring the phase of an OFDM signal is correct. It's for fine grained control after using the ...
1
vote
0answers
9 views

how to implement an encoder in matlab

How can I encode a quantized vector in matlab ? This is a part of a problem where I am asked to implement a communication block using matlab.
1
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2answers
223 views

Python delays on Raspberry Pi

I'm trying to simulate a compound action potential for calibrating research instruments. The image below is a small overview of the design. I've already completed the data acquisition from a live ...
0
votes
1answer
334 views

Maximum Information Rate

I am reading B. P Lathi, Modern Analog and Digital Communication. In it, there is a topic where the author says that maximum information rate is two pieces of information per second per hertz. Now I ...
0
votes
1answer
70 views

How is an digital coherent receiver able to achieve 100 Mhz line-scan rate for detecting coherent light in the presence of incoherent light?

Recently, I read an October 2006 IEEE JOURNAL OF LIGHTWAVE TECHNOLOGY, article titled, High-Sensitivity Detection of Narrowband Light in a More Intense Broadband Background Using Coherence ...
0
votes
1answer
17 views

What does summation EVEN and summation ODD exactly mean in truth table of IC 74180 which is used as a parity generator and parity checker?

I was trying to implement parity generator for 8 bit message using IC 74180. I understand the purpose of all the pins but don't what do those two output pins namely summation(Even) and summation(odd) ...
0
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0answers
42 views

How to send true digital data in discrete values?

To my understanding signals in any form sent through empty space is in the form of electromagnetic waves. This implies that it is never discrete two values but it can be modulated. Looking at this ...
0
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0answers
14 views

DSB-AM Spectral Efficiency

I'm studying communication systems and I have a question about Double Sideband Amplitude Modulation as to why the transmission bandwidth is twice the message bandwidth. Is it necessary the message ...
0
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0answers
32 views

What does this bandpass signal equation indicates?

This is the equation for bandpass signal from transmitter. What are the values for different parameters present in this equation. For example, what should be the value of P, Sl(t), Fc etc. Also what ...