- FHSS (Frequency Hopping Spread Spectrum)
- Operation: Uses the entire range of available frequencies, but only one frequency at a time is employed.
- Interference: May cause interference with Wi-Fi systems, but Wi-Fi does not use FHSS.
- DSSS (Direct Sequence Spread Spectrum)
- Operation: Utilizes all available frequencies simultaneously in parallel, resulting in higher data throughput compared to FHSS.
- Chipping Code: Uses a chipping code for encoding, which allows the receiver to reconstruct data even if parts of the signal are distorted by interference.
- OFDM (Orthogonal Frequency-Division Multiplexing)
- Operation: A digital multicarrier modulation scheme that transmits data on multiple channels, with signals that are perpendicular to each other, preventing interference.
- Efficiency: Allows for more tightly compacted transmission, making it highly efficient for high-speed data transmission.
These spread spectrum techniques are essential for ensuring robust and efficient data transmission, especially in environments with potential interference.