LTE Wireless Transmission System Optimization And RF Software Design

In recent years, LTE communication technology is widely applied to the field of wireless communications, and software radio technology using LTE wireless transmission system has been more attention, especially in the use of part of the hardware functions in software implementation. In a wireless communication system development process, because the index and performance does not meet the design requirements, and iterative development and version of the update process is the development that must be addressed, it is necessary to optimize the design of the communication system.This study focused on how to solve the LTE RF wireless transmission systems software driver problems, and to optimize the design of wireless transmission system.RF software design consists of two parts, namely digital IF RF module design and software drivers. In digital up conversion process, utilizing half-band interpolation filter increases the data rate to complete the work by the digital quadrature modulator, the transmission completion signal spectrum shifting. In the digital down conversion process, this paper uses the frequency DDC Compiler IP core digital XILINX provide complete digital down conversion tasks. Among RF module software driver module, including the number of A/D conversion module, local oscillator module and digital crossover module, configured via software drivers to work more than a few modules, so that the RF module can send and receive data normally completed work.Analysis of two-way wireless transmission system existing problems, for the system logic resource consumption issues, particularly cross-correlation detection module, draw an optimization design. By down-sampling to process data,64-point cross-correlation detection scheme, through optimized FPGA implemented system, saving hardware logic resources, and improve the system transmission rate, the establishment of complete and reliable transmission links.