NDLI: Combined iterative demapping and decoding for coded UWB-IR systems

Content Provider	IEEE Xplore Digital Library
Author	Takizawa, K. Kohno, R.
Copyright Year	2003
Description	Author affiliation: Commun. Res. Lab., Kanagawa, Japan (Takizawa, K.; Kohno, R.)
Abstract	This paper presents a novel decoding strategy, called combined iterative demapping/decoding (CIDD), for coded ultra wideband impulse radio (UWB-IR) systems. From the viewpoint of coding, coded UWB-IR systems can be viewed as a class of serially concatenated coding, because channel encoder and pulse mapper in the UWB-IR systems plays a role of outer and inner encoder in serial concatenated coding, respectively. For serially concatenated coding, it is well known that iterative decoding between the inner and outer decoder brings additional coding gain by using a soft-in/soft-out (SISO) decoding algorithm. In this paper, we derive a SISO algorithm for pulse demapper based on a max log-maximum a posteriori probability (MAP) algorithm to make the CIDD applicable, and then we show that this CIDD strategy improves the error rate performance with a reasonable complexity from simulation results. By applying the CIDD, larger coding gain is achieved with less computational complexity than turbo coded systems.
Sponsorship	IEEE Microwave Theory and Techniques Soc. IEEE Northern Virginia Section
Starting Page	423
Ending Page	427
File Size	326868
Page Count	5
File Format	PDF
ISBN	0780381874
DOI	10.1109/UWBST.2003.1267877
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-11-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Iterative decoding Concatenated codes Forward error correction Turbo codes Iterative algorithms Computational modeling Computational complexity Convolutional codes Convolution Error analysis
Content Type	Text
Resource Type	Article

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