The digital-communications tag has no wiki summary.
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61 views
Minimum tolerable signal to noise ratio in modern communication systems
What is the minimum tolerable SNR in today's (digital) communication systems for successful recovery of the message? I've heard that regular commercial systems can recover the message with a SNR as ...
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2answers
137 views
Why is probability theory that important to communication theory?
Since Shannon's paper Mathematical theory of communications, probability theory has played an important role on communications (digital and analog).
I've been checking some course descriptions on my ...
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Double dispersive channel with jakes model in matlab
I need to simulate a double dispersive channel with jakes model in matlab. I don't know how to choose the elements of the channel matrix. Do I have to choose them with a specific mean and variance?
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2answers
65 views
Signal to Noise ratio problem
A 200mv peak to peak sinusoidal signal is applied to an ideal 12 bit A/D converter, for which Vref(v p-p full scale) is 5v. Find signal to noise ratio.
This is a problem worked out by one of my ...
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0answers
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Help to identify unknown Sync Serial Bus
Does somebody already seen a sync serial bus communication like that ?
Repeated Pattern :
Detail of beginning :
I fail to identify it...
it look like I2C but :
it have a clock at 2MHz (so ...
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1answer
76 views
i2c maximum bus speed calculation
This question is based on the Philips I2C specification UM10204.They gave (section 7.2.1, page 56) for calculating the maximum frequency of the bus:
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2answers
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UHF Phase Modulation
I would like to design a system that produces -10 degrees and +10 degrees phase shifts at 409.6MHz (Basically BPSK).
The way I'm thinking about approaching this is by using a DDS to generate the BPSK ...
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1answer
60 views
About gatekeeper
"Gatekeeper" is a telecommunication term.
The following paragraphs are from a technical book.
My question is quite simple: is "Gatekeeper" a software or a hardware?
H,323 is one of those ...
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3answers
140 views
Communication among briefcase halves
I'm building a small laptop-ish device in a briefcase. Imagine the green wires aren't there. The LCD half lies somewhat deeper in its case than the keyboard part.
For now, testing and programming, ...
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2answers
587 views
transmitting 5v signal over a long cable
I'm seeking for help here as I need a reliable answer to this. I need to get an input signal (low frequency 5v digital pulse), to a micro-controller from a ...
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2answers
156 views
building a 900Mhz long-range data communications network
First to be clear: I am a licensed amateur radio operator with about 10 years programming experience and I took electronics in high school (2008). However I tend to stay on the soft side of things. ...
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3answers
381 views
Passive listening to USB communication
Is it possible to passively listen on low speed USB communication?
Suppose I connect a logic analyzer to D+ or D- line, will I see a valid data?
