Turbo Detection of Precoded Sphere Packing Modulation Using Four Transmit Antennas for Differential Space-Time Spreading


El Hajjar, Mohammed, Alamri, Osamah, Ng, Soon and Hanzo, Lajos (2008) Turbo Detection of Precoded Sphere Packing Modulation Using Four Transmit Antennas for Differential Space-Time Spreading. IEEE Transactions on Wireless Communications, 7, (3), 943-952. (doi:10.1109/TWC.2008.060708).

Download

[img] PDF
Download (219Kb)

Description/Abstract

This paper presents a novel turbo-detected multidimensional Sphere Packing (SP) modulation scheme using four transmit antennas combined with Differentially encoded Space-Time Spreading (DSTS). The DSTS scheme can be readily combined with PSK, QAM as well as SP modulation schemes. The SP-aided DSTS system advocated has low-complexity encoding and decoding algorithms that require no channel knowledge and it is capable of outperforming the DSTS system dispensing with sphere packing. Further system performance improvements can be attained by serially concatenated convolutional encoding combined with a unity-rate code (URC) referred to as a precoder. Then, at the receiver side, iterative decoding is invoked by exchanging extrinsic information between the precoder’s decoder as well as the outer Recursive Systematic Convolutional (RSC) code’s decoder. Moreover, the convergence behaviour of the proposed system is evaluated with the aid of Extrinsic Information Transfer (EXIT) charts. Explicitly, the turbo-detected precoded DSTS-SP system performs within 1.6 dB of the achievable multiple-input multiple output (MIMO) capacity. Finally, in contrast to an equivalent 0.5 bit/symbol throughput turbodetected DSTS-SP scheme using no precoding, the turbo-detected precoded DSTS-SP scheme exhibits no error floor. Index Terms—MIMO, differential space-time spreading, sphere packing modulation, recursive systematic convolutional code, unity rate precoder.

Item Type: Article
ISSNs: 1536-1276 (print)
Divisions: Faculty of Physical Sciences and Engineering > Electronics and Computer Science > Comms, Signal Processing & Control
ePrint ID: 265891
Date Deposited: 10 Jun 2008 16:06
Last Modified: 27 Mar 2014 20:10
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/265891

Actions (login required)

View Item View Item

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics