Variable-length FFT Processor Architecture

نویسندگان

  • Cao Liu
  • Lin Li
چکیده

In this paper, we proposed an variable length FFT processor architecture which could be used in multi-mode and multi-standard OFDM communication system. Based on radix-2 single-path delay feedback architecture, FFT is implemented with the aid of LUT and control logic. The expected architecture would complete FFT ranging 2048/1024/512point. Keywords-FFT; Radix-2 FFT; variable length FFT;

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Design of a radix-8/4/2 FFT processor for OFDM systems

The FFT processor is a very important component in Orthogonal Frequency Division Multiplexing(OFDM) communication system. In this paper, we propose an efficient variable-length radix-8/4/2 FFT architecture for OFDM systems. The FFT processor is based on radix-8 FFT algorithm and also supports radix-4 or radix-2 FFT computation. The pipelined radix-8/4/2 butterfly unit computes radix-8 FFT algor...

متن کامل

VLSI Design of a Variable-Length FFT/IFFT Processor for OFDM-Based Communication Systems

The technique of orthogonal frequency divisionmultiplexing (OFDM) is famous for its robustness against frequency-selective fading channel. This technique has been widely used in many wired and wireless communication systems. In general, the fast Fourier transform (FFT) and inverse FFT (IFFT) operations are used as the modulation/demodulation kernel in the OFDM systems, and the sizes of FFT/IFFT...

متن کامل

A power-scalable variable-length analogue DFT processor for multi-standard wireless transceivers

Since the invention of the mobile phone, a new generation of mobile communication standard has emerged every 10 years. Upgrading the technology of mobile networks in all areas takes few years. Hence, mobile phones should support the previous communication standards as well as the latest standards. Realizing a multi-standard mobile phone by multiple transceivers in parallel is neither a size-eff...

متن کامل

Reconfigurable N-Point FFT Processor Design For OFDM System

Under many research works, it has been observed that the multiple input multiple output (MIMO) system can be considered an efficient solution for the high-speed wireless communication. However, the delay spreads in non-flat fading channels abrupt the functioning of MIMO system. In orthogonal frequency division multiplexing (OFDM), the channel impulse response is flat in each sub carrier. Hence,...

متن کامل

Low-Power and High Speed 128-Point Pipline FFT/IFFT Processor for OFDM Applications

This paper represents low power and high speed 128-point pipelined Fast Fourier Transform (FFT) and its inverse Fast Fourier Transform (IFFT) processor for OFDM. The Modified architecture also provides concept of ROM module and variable length support from 128~2048 point for FFT/IFFT for OFDM applications such as digital audio broadcasting (DAB), digital video broadcasting-terrestrial (DVB-T), ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2012