Why use Direct Sequence Spread Spectrum?
There are two main broadcast methods that spread spectrum manufacturers can utilize. One format is called Frequency Hopping Spread Spectrum (FHSS). With an FHSS system, the transmitter transmits a narrow band signal and rapidly jumps from one frequency to the next, spending a few milliseconds on each frequency. Originally, Spektrum engineers started their development with FHSS-based systems because they were relatively easy and inexpensive to develop. However, they soon discovered that FHSS had several limitations that would prevent it from being the optimal solution for RC. While more difficult and costly to develop, our engineers began experimenting with Direct Sequence Spread Spectrum (DSSS) and optimized the modulation scheme to overcome critical response and re-link issues. DSSS systems transmit on a single selected frequency but on a very wide band. Only a small portion of that band is used for specially encoded information. In addition, DSSS offers an increase of processing gain
- Weve been using direct sequence spread spectrum for data transmission. How does algorithmic frequency hopping compare to direct sequece, and how does it work?
- Weve been using frequency hopping spread spectrum (FHSS) for data transmission. How does direct sequence spread spectrum (DSSS) compare to FHSS?
- How does direct sequence spread spectrum (DSSS) differ from frequency hopping spread spectrum (FHSS)?