Design of a DSP_Based Hndset

Abstract

In the present decade, hundreds of digital radios are produced around the world. These radios are utilized with at least one high performance processor, which make them have good communication quality depending on Digital Signal Processing (DSP), support standard encryption, and have all the advantages of the digital communication. That makes analog radios and old digital radios inconvenient for nowadays usage and replaced by new radios. In this thesis, a DSP-Based Handset design is proposed to utilize the analog radios with all the advantages of the digital communication and improve the existing old digital radios, without any hardware modification. This handset can be connected to any analog radio or old digital radio irrespective to its band to communicate between any two analog radios or similar digital radios in clear voice mode, which has no voice coding. The design of the DSP-Based Handset is demonstrated and discussed in details. The appropriate choices for the main parts of the hardware are mentioned and the reasons of selection are explained. The DSP program steps and flow are discussed theoretically and practically. An experiment that represents a simplified design of the DSP-Based Handset is implemented. Software and hardware tests are applied on this experiment to explain and test the design of DSP-Based Handset. The tests results were almost matching the intended results.