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Compare ASK , PSK & FSK systems.
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written 8.6 years ago by |
Parameters | ASK | FSK | PSK |
---|---|---|---|
Variable characteristics | Amplitude | Frequency | Phase |
Bandwidth | Is proportional to signal rate (B =(1+d)S),d is due to modulation & filtering ,lies between 0 & 1. | B=(1+d)×S+2Δf | B=(1+d)×S |
Noise immunity | low | High | High |
Complexity | Simple | Moderately complex | Very complex |
Error probability | High | Low | Low |
Performance in presence of noise | Poor | Better than ASK | Better than FSK |
Bit rate | Suitable upto 100 bits/sec | Suitable upto about 1200 bits/sec | Suitable for high bit rates |