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Can we send HD video signal via wideband FM modulation

时间:04-06 整理:3721RD 点击:
I am doing a essay on studio technology and was wondering if it was possible to send a signal via wireless like this, I know that a max signal on a triax cable is 2.5 GHz

Seems to me that for frequency modulation to work, the carrier frequency must be many times the data speed. A few cycles at any one frequency are required to establish a datum. This is the case for binary or analog transmitting. It's how audio frequencies can be broadcast by FM.

We cannot try to make the data rate so fast that it allows time for only one or two cycles of the FM carrier. A datum could not be recognized in that event. I'm not sure but I would imagine video (or HD video) gets into this realm.

---------- Post added at 06:10 ---------- Previous post was at 05:35 ----------

Now that I remember that my computer can receive HD Youtube videos over wifi. 2.4 GHz....

However that isn't full-screen tv quality.

So it would appear it becomes a question how large the frame size is, and how fast the frame rate is.

I would be looking to do it using pal so 25 frames and in full hd with no compression at any stage so 1080.

Uncompressed high speed digital data as source for frequency modulation (FM) in an environment where zero BER is a requirement?
Everything is possible but FM modulated wireless link seems a bit overcomplicated (assume you are thinking about to modulate with DA-converted raw picture information).
Are you sure that it not is FSK you are thinking about? Or AM? or even better QAM.
1920 x 1080 x 3 x 50 = 300 MB/sec => 2.5 Gb/sec so a 5 GHz carrier seems possible if it is a short distance and LOS as RF reflections are going to be a problem over a such wide frequency range in a studio. Can say that in a professional studio environment would nobody like this idea to block all other RF equipment with a single HD channel. If carrier is increased to 20-80 GHz and you can guarantee that it not cause any EMI in any existing studio equipment can it maybe be accepted.

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