PROJECT TITLE :

Modem based on sphere packing techniques in high-dimensional Euclidian sub-space for efficient data over voice communication through mobile voice channels

ABSTRACT:

The increased penetration of cellular networks has made voice channels widely available ubiquitously. On the opposite hand, mobile voice channels possess properties that create them an ideal choice for top priority, low-rate real-time communications. Mobile voice channel with the mentioned properties, could be utilised in emergency applications in vehicular communications area like the standardised emergency decision system planned to be launched in 2015. This study aims to research the challenges of information transmission through these channels and proposes an efficient data transfer structure. To this end, a proper statistical model for the channel distortion is proposed and an optimum detector is derived considering the proposed channel model. Optimum symbols are also designed per the derived rule and analytical bounds on error likelihood are obtained for the orthogonal signaling and sphere packing techniques. Moreover, analytical analysis is performed and applicable simulation results are presented. Finally, it is observed that the proposed structure based mostly on the sphere packing technique achieves superior performance compared with previous works during this field. Although the ideas offered in this study are utilised to cope with voice channel non-idealities, the steps taken in this study might also be applied to channels with similar conditions.