標題: A Variable-Length FFT Processor for 4x4 MIMO-OFDM Systems
作者: Hung, Chian-Chang
Chiu, Po-Lin
Huang, Yuan-Hao
電信工程研究所
Institute of Communications Engineering
公開日期: 2010
摘要: In this paper, we present a 128 similar to 2048-point variable-length FFT processor for 4x4 MIMO-OFDM systems. In general, we must use n FFT processors for the nxn MIMO-OFDM system, and only 1/r operation time is employed for radix-r pipeline butterfly processor. This increases hardware cost and reduces hardware efficiency in VLSI implementation. Therefore, we propose radix-4(2) algorithm to deal with four data sequences simultaneously and a butterfly sharing technique to improve the hardware utilization. The design and implementation results show that the proposed FFT processor can achieve 83.3MHz frequency with 3.19mm(2) core area using a standard 90nm technology.
URI: http://hdl.handle.net/11536/134860
ISBN: 978-1-4244-5271-2
期刊: 2010 INTERNATIONAL SYMPOSIUM ON VLSI DESIGN AUTOMATION AND TEST (VLSI-DAT)
起始頁: 156
結束頁: 159
Appears in Collections:Conferences Paper