Questions tagged [encoding]

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9
votes
2answers
129 views

What is the decimal in Morse Code?

The ITU's International Morse Code recommendation ITU-R M.1677-1 specifies a "Full stop (period)" as ".−.−.−", however it falls short of specifying a decimal point. Even the examples, though they ...
1
vote
1answer
104 views

What are all the three letter codes for the different emission designators?

For example, A1A is "morse telegraphy by on-off keying". What are the others?
5
votes
1answer
178 views

How is Data Whitening done?

Is it safe to define that Data Whitening is always X-ORing a payload with a pheudorandom sequence known to both receiver and transmitter? In more detail, lets assume the following case. I have the ...
0
votes
1answer
280 views

How exactly does Data Whitening improve performance?

Prior to transmission, almost all wireless systems perform encoding on data to improve the packet reception rate. These may include, Forward Error Correction, Interleaving, Whitening, Gray Coding etc. ...
0
votes
2answers
66 views

Extracting received power info from teletype like audio

Is it possible to digitally extract received power info (like VU meter perhaps) from and PSK31 audio (or alike), actually the mode for text encoding over audio hasn't been chosen yet and the ...
5
votes
3answers
2k views

How are capital letters sent in Morse code?

There is only one alphabet in Morse code, so is there a recognised way to indicate a capital letter?
1
vote
0answers
69 views

Data encoding puzzle [closed]

I have a usb stick that communicates with a medical device. I am attempting to decode the communication. I have figured out the basic radio parameters (916.5MHz, ook, bit rate, preamble, sync words), ...
5
votes
4answers
398 views

Is there such a thing as a phase modulation voice signal?

Wikipedia indicates that in the digital domain ASK, FSK, and PSK are common. It seems that only AM and FM are used for analog forms of communication. Why don't we use Phase Modulation techniques, ...