The IEEE 802.11 specifications define standards for three unlicensed wireless methods. Two of these methods use radio waves and the third uses infrared light. As infrared is a limited technology that is only capable of transmitting relatively short distance vs. radio-based methods, in this document we will explore the two RF options, known as Direct Sequence Spread Spectrum (DSSS) and Frequency Hopping Spread Spectrum (FHSS). To analyze which technology is better suited for your application, it is important to understand the vast differences in the technologies and the performance they will provide.
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