论文部分内容阅读
正交频分复用(OFDM,Orthogonal Frequency Division Multiplex)技术作为未来移动通信系统的关键技术而成为当今无线通信领域的研究热点。但OFDM技术对频偏、定时和相位噪声敏感,较小的同步偏差即会导致系统的误码性能恶化,甚至通信失效。提出一种具有实用价值的符号同步简化算法,并详细阐述基于现场可编程门阵列(FPGA)的实现过程。仿真结果表明:该电路有较高的同步精度,通过量化及制定门限值等简化方法可有效减少对芯片资源的占用,节省传输带宽。
Orthogonal Frequency Division Multiplexing (OFDM), as the key technology in the future mobile communication system, has become the research hotspot in the field of wireless communication. However, OFDM technology is sensitive to frequency offset, timing and phase noise. Smaller synchronization errors cause system error performance degradation and even communication failure. This paper presents a symbolic synchronization simplified algorithm with practical value and elaborates the realization process based on field programmable gate array (FPGA). The simulation results show that the circuit has high synchronization accuracy. By simplifying methods such as quantization and threshold setting, the chip resources can be effectively reduced and the transmission bandwidth can be saved.