The Design And Implementation Of Real-Time Broadband Wireless Communication Platform Based On FPGA

Telecommunication,as a link between various advanced technologies,is a necessity for human production and life.However,public communication networks that rely on infrastructure equipment often fail to meet the demands of applications in some extreme environments.At the same time,more and more applications need to transmit important data through dedicated communication networks rather than public networks.According to the current research situation,the dedicated communication network solutions generally have the characteristics of weak integration in equipment and single function.Combining with the actual application scenarios and the demands of partners,this paper designs and implements a long-distance broadband wireless communication solution and a special communication platform based on the self-built communication protocol.This platform can fully implement the function of multi-data acquisition,transmission and reprocessing,and has the characteristics of excellent portability and plug-and-play.While providing users with a safe and reliable communication link,the platform can fill some application market gaps that the public network can not meet.The platform adopts FPGA as the baseband core processor to implement the digital baseband architecture of broadband wireless communication based on COFDM technology.The platform uses MRC receive diversity technology to improve reliability.The bidirectional transmission with low-latency is achieved through the high concurrency features of the FPGA.The self-designed hardware platform takes FPGA+ARM+AD9361 as the core architecture.Multi-core processor i.MX6 collects and transmits data through a variety of peripheral interfaces.The platform uses FPGA and AD9361 to provide a data processing solution for communication with peripheral RF circuits such as PA and LNA.Hardware design includes complex schematic design and 10-layer PCB design.The hardware design successfully handles the signal integrity and power integrity challenges in 1066-DDR3 data caching module and high-speed peripheral interfaces.Also,the hardware design handles the difficulty of meeting receiver sensitivity requirements.The software development and system debugging are completed on the selfdesigned hardware platform.The software design includes complex baseband algorithm and control program coded in FPGA which is implemented by pure digital circuit,and another part of software design is data processing coded in ARM.The platform implements low-latency FHD video transmission,and is backwardcompatible with text and audio transmission.At the same time,the platform implements bidirectional transmission through TDD.The platform's various peripheral interfaces improve the versatility of the platform on the basis of ensuring portability,so that the platform can be used in various application scenarios.This platform is provided with a flexible configuration mechanism,so that users can adjust the baseband communication strategy according to the application scenario and performance requirements.