A Simple and Low Cost Land-Mobile-Radio Design for Interoperability Among Radio Networks in a Public Safety Scenario

摘要

Interoperability amongst various radio networks is one of the core objectives of software defined radios. To address this core concept for public safety, future radio networks would benefit, only if those would be dynamically adaptable and reconfigurable in order to ensure interoperability. These radios are supposed to be multi-band, multi-standard across wide radio frequency spectrum and also be compatible with legacy transceivers systems. In this paper we propose a land-mobileradio design as a simple and low cost solution for this key issue of interoperability in a public safety scenario. Our proposed radio design is capable to receive and simultaneously down-convert and digitize desired channels from the bands allocated by Federal Communications Commission, USA, for public safety radio. Based on direct RF bandpass sampling, our design requires a low speed ADC upto 10 Msps, having wide input bandwidth of 800 MHz and hence gives assurance in reduction of system cost, complexity without any compromise on fast detection and processing of radio channels.