关键词: 软件无线电, 数字信号处理, FPGA, LVDS, ILA

Abstract: In contemporary mainstream software defined radios, analog-to-digital converters (ADCs) exhibit high sampling rates and resolutions, leading to an increased demand for more efficient digital interfaces. To fulfill the current practical requirements for high-speed interference resistance, high scalability, and low power consumption, and to reduce the bit error rate caused by jitters and glitches during high-speed transmission, a baseband interface module based on FPGA for the AD936x is designed. The system composition of the module and key technologies such as low voltage differential signaling double data rate (LVDS DDR) between ADC and FPGA, clock sampling, differential conversion, frame data synchronization, and configurable delay are emphasized. The experimental results of data transmission demonstrate the module's reliable high-speed anti-interference data transmission capability. Compared to traditional baseband interfaces, this module features high speed, high reliability, low power consumption, and high configurability.

Key words: software defined radio, digital signal processing, FPGA, LVDS, ILA