Contents
What are the advantages and limitations of FSK?
Advantages
- Simple process to construct the circuit.
- Zero amplitude variations.
- Supports a high data rate.
- Low probability of error.
- High SNR (signal to noise ratio).
- More noise immunity than the ASK.
- Error-free reception can be possible with FSK.
- Useful in high-frequency radio transmissions.
What are the characteristics of FSK?
Frequency-shift-keying (FSK) signals with modulation index m = 0.5 have two significant properties. They have no discrete frequency components and nearly all the signal energy is contained within a narrow frequency region equal to \frac{3}{2} of the bit speed even without any band limiting.
What will happen if the same frequency is used for both the carriers in FSK?
With the help of message signal we vary the corresponding carrier signal which is high frequency signal and capable to transmit wirelessly for longer range, if both carrier and message signal frequencies are the same then it is not required for modulation.
How is error free communication achieved with FSK?
By FSK modulation technique we can achieve error-free communication in a few digital applications. But this FSK has finite data rate and consumes more bandwidth can be overcome by the QAM, which is known as quadrature amplitude modulation. It is the combination of amplitude modulation and phase modulation.
How are two different frequencies represented in FSK?
The reason behind this, FSK modulated signals are represented in terms of two different frequencies. The frequencies are called “mark frequency” and “space-frequency”. Mark frequency has represented logic 1 and space-frequency has represented the logic 0.
What are the advantages and disadvantages of FSK?
There are few frequency shift keying advantages and disadvantages are listed below. Supports a high data rate. Low probability of error. High SNR (signal to noise ratio). Due to the requirement of large bandwidth, this FSK has limitations to use only in low-speed modems which the bit rate is 1200bits/sec.
What’s the name of the asynchronous FSK detection?
Another name for this detection is Asynchronous detection. In this synchronous FSK detection, the modulated wave got affected by noise while reaching the receiver. So, this noise can be eliminated from using the bandpass filter (BPF).