Browsing by Author "Hung, CP"

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An efficient memory-based FFT architecture
(2003)
Chang, CK
;
Hung, CP
;
Chen, SG
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電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
This paper proposes an efficient memory-based radix-2 FFT architecture, which greatly improves the memory-based FFT [5], [6] by reducing 50% memory size requirement, while maintaining a simple address generator. Specifically the memory size is reduced to 1.25N words. In addition, the multiplier utilization rate is 100%.
Design of an efficient variable-length FFT processor
(2004)
Hung, CP
;
Chen, SG
;
Chen, KL
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
In this paper, we propose an efficient variable-length FFT processor architecture suitable for multi-mode and multi-standard OFDM communication systems. The FFT processor is based on radix-2(2) DIF FFT algorithm and also supports non-power-of-4 FFT computation. The design contains an efficient processing element (PE), which can execute radix-2(2) butterfly (BF) operations, as well as radix-2 BF operations. Moreover, in order to achieve high-performance variable-length FFT operations and data accesses, an efficient variable-length address generator and twiddle factor generator are designed. The design has the merits of low complexity and high speed performance. The designs consider seven different FFT lengths including 64, 256, 512, 1024, 2048, 4096, and 8192 points, which cover all the required FFT lengths by 802.1.1a, 802.16a, DAB, DVB-T, VDSL and ADSL.
Multiuser detection for MFSK frequency-hopped multiple access systems
(1996)
Su, YT
;
Hsiao, CY
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Hung, CP
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電信工程研究所
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Institute of Communications Engineering