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根据高速卫星TCM 8PSK调制解调的要求,针对数字化基带成形滤波的信号处理特点和FPGA内部结构,本文提出一种基于FFT-IFFT的高速卫星成形滤波器设计方法及FPGA算法。FPGA中有FFT的ipcore资源,直接引用FPGA中的ipcore资源能简化编程,易于快速实现。在X IL INX公司100万门的芯片V IRTEX 2-1000上实现此方案,MODELSIM的时序仿真结果表明可支持高达400M b it/s的输入数据,满足卫星通信高速成形的要求。本文结尾针对未来更高速率的成形滤波器给出了一种通用硬件实现方法。
According to the requirement of high-speed satellite TCM 8PSK modulation and demodulation, aiming at the signal processing characteristic of digital baseband shaping filter and the internal structure of FPGA, a high-speed satellite shaping filter design method and FPGA algorithm based on FFT-IFFT are proposed in this paper. FPGA in the FFT ipcore resources, direct reference to FPGA ipcore resources to simplify programming, easy to quickly achieve. This solution is implemented on X IL INX’s 1-Million-chip VTRTEX 2-1000. MODELSIM timing simulation results show that it supports input data up to 400Mbit / s to meet the requirements of high speed satellite communications. At the end of this paper, we give a general hardware implementation method for the shaping filter of higher speed in the future.