NDLI: Recursive space-time trellis codes using differential encoding

Content Provider	IEEE Xplore Digital Library
Author	Shengli Fu Xiang-Gen Xia Haiquan Wang
Copyright Year	2005
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Delaware Univ., Newark, DE, USA (Shengli Fu; Xiang-Gen Xia; Haiquan Wang)
Abstract	Differential space-time modulation (DSTM) has been recently proposed by Hughes, and Hochwald and Sweldens when the channel information is not known at the receiver. On the other hand, the DSTM also needs a recursive memory of a matrix block at the encoder and therefore provides a trellis structure when the channel information is known at the receiver, which is the interest of this paper. This recursive structure of the DSTM has been adopted lately by Schlegel and Grant as an inner trellis code concatenated with an outer binary code to achieve turbo gain. The number of states of the trellis from the recursive structure depends on both the memory size, which is fixed in this case, and the unitary space-time code (USTC). In this paper, we propose a new USTC design criterion to ensure that the trellis structure improves the diversity product over the USTC as a block code. Based on the new criterion, we propose a new class of USTC design for an arbitrary number of transmit antennas that has an analytical diversity product formula for two transmit antennas. We then follow Schlegel and Grant's approach for joint encoding and iterative decoding of a binary coded DSTM (turbo space-time coding) and numerically show that our new USTC designs for the recursive space-time trellis modulation outperforms the group USTC used by Schlegel and Grant.
File Size	162477
File Format	PDF
ISBN	0780394143
DOI	10.1109/GLOCOM.2005.1577925
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-11-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Convolutional codes Encoding Block codes Modulation coding Iterative decoding Concatenated codes Binary codes Space time codes Transmitting antennas Fading
Content Type	Text
Resource Type	Article

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