This report documents the project work of ten students taking the course TDT4295 Datamaskiner prosjektarbeid (English: Computers project work) at NTNU in the fall term of 2007.
The goal of the project was to create two identical units able to communicate speech securely over a common mobile phone network. The project introduced a variety of distinct tools and design techniques. Most of these tools were new to most of the participants of this project. We got to experience important aspects of hardware design, notably PCB design, the use and programming of a microcontroller and FPGA logic design. The project emphasized learning of various techniques and the process of designing a system rather than an optimal design.
We produced two prototypes, as we intended. These prototypes unfortunately had problems with the audio. By the delivery deadline of this report, we could not set up a full duplex encrypted conversation due to problems with this part. However, the systems are capable of secure communication, by sending encrypted SMS messages back and forth.
The final report can be found here.