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Ati says | |||
| Apologies if thise has been thought of before, but this just occured to me as an interesting way of improving data transfer systems. Basically, the idea is best explained by a hypothetical situation. Imagine two houses, House A and House B. There is a single copper phone line runnign between the two. Now let's say that both houses want to carry on two simultansous conversations across this one phone line (let's say Mrs. A wants to call Mrs. B, and Mr. A wants to call Mr. B). In a normal system, this impossible, but with a bit of ingenuity it can be solved. Imagine this solution: An addition piece of equipment is attached to the phone line on both ends. The device taken one call, divides it by ten, and adds it into the currect data stream, on top of the original one. On the other end, another box takes the incoming binary stream, rounds it off to the nearest string of whole numbers, and sends it to one phone set. Then, it subtracts the value of the rounded-off string from the actual data coming in, and magnifies the resulting signal by ten, sending it to the second receiver. So, essentially, if the two calls start like this: Call A: 111010 Call B: 100001 The first box processes them, and the signal transmitted down the line looks like this: 1.1, 1.0, 1.0, 0.0, 1.0, 0.1 Then the second box round all the values off to the nearest string of whole values (111010), and subtracts this from the actualy stream, producing the second call (0.1, 0.0, 0.0, 0.0, 0.0, 0.1). It then multiplies by ten to produce the second call in it's entirety (100001), and sends this to the second reciever. This allows, in effect, two calls to take place usin the same piece of bandwith, without slowing either of them, save the router latency. Any suggestions as to how to improve this technique, or ideas as to how it would scale using more decimal points? |
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| Total Topic Karma: 22 | - More by this Author | |||
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Ati says |
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| Agh, sorry, mispelled 'analog'. Hate it when I do that. | |||||
| - Author's History - 03 June, 2007 | |||||
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jared.nance says |
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| ati- what you're describing is the principle behind FM/AM. your radio receiver in your car, for example, does not receive a single signal - it receives two. the carrier frequency is what you 'tune' your radio to, and the modulation frequency is a second signal that is used to produce what you actually hear on the radio. you add the modulation signal to the carrier, send it out, and then subtract the carrier again to retrieve (demodulate) the signal. for the record, the simplest 'device' that you are describing is called a frequency mixer. it accomplishes addition, subtraction, and even multiplication quite faithfully. |
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| - Author's History - 03 June, 2007 | |||||
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