The details of my modulation scheme are as follows: 4 FSK, deviation is 2 kHz and 4 Khz with a data rate of 10 kHz. Can someone tell me the tradeoffs with limiter type of demod vs other types?
2006-08-29 10:00:41 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
The nice thing about FSK is that you can 'demodulate' it using only bandpass filters. Plus, you're not limited just to binary. You can use some other base, such as ternary.
That's useful in satellite communications where you want to transmit some kind of 'bit' just to keep the entire receiving circuitry active the entire time the satellite's in view even if you're not sending any commands at the time.
2006-08-29 10:45:15 · answer #1 · answered by Bob G 6 · 0⤊ 0⤋
Circuit Cellar just had an excellent article about FSK signal detection. (#194, September 2006, pp 18-22)
2006-08-29 23:00:02 · answer #2 · answered by Anonymous · 0⤊ 0⤋
any decent communications book will go over this.
2006-08-29 22:47:32 · answer #3 · answered by cw 3 · 0⤊ 0⤋