Maximum likelihood detection for differential unitary space-time modulation with carrier frequency offset
Abstract
Can conventional differential unitary space time modulation (DUSTM) be applied when there is an unknown carrier frequency offset (CFO)? This paper answers this question affirmatively and derives the necessary maximum likelihood (ML) detection rule. The asymptotic performance of the proposed ML rule is analyzed, leading to a code design criterion for DUSTM by using the modified diversity product. The resulting proposed decision rule is a new differential modulation scheme in both the temporal and spatial domains. Two sub-optimal multiple-symbol decision rules with improved performance are also proposed. For the efficient implementation of these, we derive a modified bound intersection detector (BID), a generalization of the previously derived optimal BID for the conventional DUSTM. The simulation results show that the proposed differential modulation scheme is more robust against CFO drifting than the existing double temporal differential modulation.
Additional Information
© Copyright 2008 IEEE. Reprinted with permission. Paper approved by H. Jafarkhani, the Editor for Wireless Communications of the IEEE Communications Society. Manuscript received December 7, 2006; revised May 14, 2007 and August 23, 2007. This work was supported in part by the National University of Singapore under Grant R-263-000-421-112. This paper was presented in part at the IEEE Global Telecommunications Conference, Washington, DC, USA, November 2007. We would like to express our thanks to Dr. Rong Li from National University of Singapore for suggesting reference [23]. We also thank the editor H. Jafarkhani and anonymous reviewers for their helpful comments to improve the quality of this work.Attached Files
Published - GAOieeetc08c.pdf
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Additional details
- Eprint ID
- 12550
- Resolver ID
- CaltechAUTHORS:GAOieeetc08c
- National University of Singapore
- R-263-000-421-112
- Created
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2008-12-12Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field