Modulation and coding schemes for TDM/SS packet radio

Abstract

A novel frequency hopped spread spectrum packet radio communication system suitable for time division multiplexed, high speed indoor office wireless networks is proposed. The hopping is carried out at a logical level on the bit stream rather than physical hopping of the carriers. This on one hand eliminates phase problems associated with differential modulation along hopped carriers in frequency-selective fading channels, and on the other circumvents the need for agile frequency synthesizers. A coding strategy has been developed to provide the best error-rate performance under given channel conditions. System design issues are discussed and an example design is presented.<>