tailieunhanh - Báo cáo hóa học: " Research Article Automatic IP Generation of FFT/IFFT Processors with Word-Length Optimization for MIMO-OFDM Systems"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Automatic IP Generation of FFT/IFFT Processors with Word-Length Optimization for MIMO-OFDM Systems | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2011 Article ID 136319 15 pages doi 2011 136319 Research Article Automatic IP Generation of FFT IFFT Processors with Word-Length Optimization for MIMO-OFDM Systems Pei-Yun Tsai Chia-Wei Chen and Meng-Yuan Huang Department of Electrical Engineering National Central University Jhongli 32001 Taiwan Correspondence should be addressed to Pei-Yun Tsai pytsai@ Received 26 May 2010 Revised 18 October 2010 Accepted 11 November 2010 Academic Editor Juan A. Lopez Copyright 2011 Pei-Yun Tsai et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. A systematic approach is presented for automatically generating variable-size FFT IFFT soft intellectual property IP cores for MIMO-OFDM systems. The finite-precision effect in an FFT processor is first analyzed and then an effective word-length searching algorithm is proposed and incorporated in the proposed IP generator. From the comparison we show that our analysis of the finite precision effect in FFT is much more accurate than the previous work. With the flexible architecture and the effective word-length searching techniques we can strike a good balance for the performance and the hardware cost of the generated IP cores. The generated FFT soft IP cores are portable and independent of the silicon technology which helps to greatly reduce the design time. Experimental results demonstrate that the proposed IP generator indeed provides FFT IPs which meet the requirements and are more suitable in recent MIMO-OFDM communication standards drafts than some conventional FFT IP generators. 1. Introduction Orthogonal frequency-division multiplexing OFDM is one of the most popular modulation schemes in recent wireless communication systems. In OFDM transceivers discrete .