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Efficient 16-points FFT/IFFT Architecture for OFDM Based Wireless Broadband Communication

机译:基于OFDM的无线宽带通信的高效16点FFT / IFFT架构

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摘要

The Fast Fourier Transform (FFT) and its inverse transform IFFT processors are a key component in OFDM based wireless broadband communication systems. Hence, it is important to develop a low-power and high-performance FFT/IFFT processor to meet the requirement of low cost and real time in such communication systems. In this study, an efficient 16-points FFT/IFFT module is developed to build a large FFT/IFFT processor for OFDM based communication system (IEEE 802.16). The 16-point FFT architecture consists of an optimized pipeline implementation based on Radix-2 butterfly Processor Element. This proposed architecture reduces the multiplicative complexity and power consumption compared to other efficient architectures. The FFT processor has been implemented in VHDL code. The simulation results show that this processor significantly achieves a better performance with less complex multiplications and lower resource usage.
机译:快速傅立叶变换(FFT)及其逆变换IFFT处理器是基于OFDM的无线宽带通信系统中的关键组件。因此,重要的是开发一种低功耗,高性能的FFT / IFFT处理器,以满足此类通信系统中低成本和实时的要求。在这项研究中,开发了一种高效的16点FFT / IFFT模块,以为基于OFDM的通信系统(IEEE 802.16)构建大型FFT / IFFT处理器。 16点FFT架构由基于Radix-2蝶形处理器单元的优化管线实现组成。与其他有效架构相比,该提议的架构降低了乘法复杂性和功耗。 FFT处理器已以VHDL代码实现。仿真结果表明,该处理器通过较少的乘法运算和较低的资源使用率,可以显着提高性能。

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