Spread Spectrum is a transmission technique in wireless communication, where the transmitted signal is spread over a wider frequency band than required for traditional transmission. Unlike narrowband transmission, spread spectrum is a wideband technology that enhances signal robustness and security. This makes the signal more resistant to interference, noise, and eavesdropping.
Why is it used
- Interference Resistance – Reduces the impact of noise and jamming.
- Security – Difficult to intercept due to signal spreading.
- Multiple Access – Allows multiple users to share the same bandwidth eefficiently (e.g., CDMA).
- Low Probability of Detection: Appears like noise, making it hard to detect by unintended receivers.
Types of Spread Spectrum:
- Frequency Hopping Spread Spectrum (FHSS)
- Direct Sequence Spread Spectrum (DSSS)