A comma-free Reed-Solomon decoder chip for W-CDMA/FDD applications

Chi-Fang Li1, Chong-Ren Wang1, Yuan-Sun Chu1, Wern-Ho Sheen2
1Institute of Electrical Engineering, National Chung Cheng University, Chiayi, Taiwan
2Department of Communication Engineering, National Chiao Tung University, Hsinchu, Taiwan

Tóm tắt

A (15, 3) CFRS (comma-free Reed-Solomon) code has been devised in the 3GPP W-CDMA/FDD system (3/sup rd/ generation partnership project, wideband code division multiple access/frequency division duplexing) in order to facilitate frame synchronization and code-group identification in the cell search procedure. This paper proposes a CFRS decoder chip for fast, multi-speed decoding in this application. With this fast decoder, realization of more sophisticated cell search algorithms that may be needed in some application scenarios will become feasible. Besides, a multi-speed decoding can be implemented within the same architecture. Multi-speed decoding equips a mobile for being able to use different algorithms in different cell search scenarios. The decoder achieves low power dissipation with low clock rate as well as fast decoding for a cordless mobile by using a folding systolic architecture. Finally, the proposed CFRS decoder is realized in a 3.3-V 0.35-/spl mu/m CMOS technology with 2.2/spl times/2.2-mm/sup 2/ core area and 13.3/1.23-mW power dissipation.

Từ khóa

#Reed-Solomon codes #Decoding #Multiaccess communication #Synchronization #CMOS technology #Global Positioning System #Systolic arrays #Power dissipation #Clocks #Delay effects

Tài liệu tham khảo

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