Design of an 128-point FFT processor for OFDM applications
Design of an 128-point FFT processor for OFDM applications
复制标题
用于 OFDM 应用的 128 点 FFT 处理器的设计
DOI：
10.1109/icecs.1996.584499
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
L. Wanhammar
中科院分区：
文献类型：
--
作者：
J. Melander;T. Widhe;L. Wanhammar
设计 ASIC 时的重要问题是设计时间短、灵活性、构建块的重用和可靠性。这些因素可以通过使用自动设计工具和标准单元设计来满足。这种方法的主要缺点是可达到的电路性能。在本文中，我们提出了一种高效的设计方法，该方法结合了标准单元方法的短设计时间和灵活性以及无约束单元布局风格的高性能。利用这种方法成功设计了针对 OFDM 应用的 128 点 FFT/IFFT 芯片。此外，提出了一种可根据吞吐量要求进行扩展的模块化架构。吞吐量缩放也可用于降低功耗。
Important issues in designing ASICs are short design time, flexibility, reuse of building blocks, and reliability. These factors can be met by using automatic design tools and standard-cell design. The major drawback with this approach is the attainable circuit performance. In this paper we present an efficient design approach which combines the short design time and flexibility of the standard-cell approach and the high performance of the unconstrained cell layout style. A 128-point FFT/IFFT chip aimed at OFDM applications has successfully been designed using this approach. Further, a modular architecture is proposed that is scalable with respect to the throughput requirements. The throughput scaling can also be utilized to reduce power consumption.