| Through the development of wireless communication In the past 20 years, wireless communication has advanced rapidly in the world, which provides kinds of services to the people, and satisfies various requirements of our society. Whereas, most wireless communication systems have almost the same carrier frequency and modulated mode. So It is not compatible with each others, which has already become a great difficulty to meet requirement of future communication systems.Software radio (SR) emerged as the times require, and provides a thought of solving this problem. SR is based on a versatile programmable platform to realize all kinds of communications criterions, to meet requirements of many increasing new molds and functions. The agility of systems is highly improved. As another revolution in wireless communication area, SR has become one of the most important research fields.This paper aimed at studying the principle, architecture and features of SDR and developing a mid-frequency digital signal receiver platform Based On Software Radio. The core of this mid-frequency digital signal receiver platform which is based on PCI bus is high-efficiency float-point DSP ADSP-TigerSHARC. It also includes a one-channel high-capacity acquiring system and high-capacity signal storage. And this paper do further analyse and study on the PSK signal in digital intermediate frequency receiver, and give a simple efficacious PSK signal estimate method.This paper focuses on the development of DSP processors. The essay adopts DSP processors to set up the core processing unit. The whole system adopts the Software Raido structure based on the transform. The broadband digital signal receiver requires a kind of chip with high performance because of complicated intermediate frequency signal processing.. At the end of the essay we validate the whole system platform with the recognition of modulation and cord rate. |
