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FFT8
- 本设计根据OFDM系统的实际需要,提出一种用FPGA实现FFT运算的方案,并以64点FFT为例,在Quartus II软件上通过了综合和仿真。
OFDM_64QAM
- ofdm model 64 qam from mathwork-ofdm model 64 qam from mathwork......
ofdmbaseband
- the OFDM PHY is adaptive therefore it supports multiple schemes BPSK, QPSK, 16-QAM and 64-QAM for data carriers’ modulation. The constellation diagrams are gray mapped and shows the magnitudes I and Q (In-phase and Quadrature) components of e
gam3
- FPGA Implementation ofLow Power 64-Point Radix-4 FFT Processor for OFDM System
gam5
- FPGA Implementation ofLow Power 64-Point Radix-4 FFT Processor for OFDM System
gam7
- FPGA Implementation ofLow Power 64-Point Radix-4 FFT Processor for OFDM System
Dec_mul
- 时间同步后即可确定每帧数据的起始位置,这样就能完整的截取下每一帧。但是,数据中还带有频偏信息。在常规的通信系统中,多普勒很小仅仅会带来很小的频偏,但是在大多普勒的情况下,频偏将非常大,20马赫的速度将会带来将近34K的频偏。因此,如何很好的纠正频偏即为本系统的难点。 OFDM中,我们将大于子载波间隔倍数的频偏称为整数倍频偏,而将小于一个子载波间隔的频偏称为小数倍频偏。频偏矫正精度只要能保证小于十分之一倍的子载波间隔,频偏就不会对均衡和解调造成影响。本文中我们借鉴这种思想,由于硬件资源限制,我