Differential Coding for MIMO and Cooperative Communications

Author:

Bhatnagar, Manav R. [claim]

Description:

Multiple-input multiple-output (MIMO) wireless communication systems have been studied a lot in the last ten years. They have many promising features like array gain, diversity gain, spatial multiplexing gain, interference reduction, and improved capacity as compared to a single-input single-output (SISO) systems. However, the increasing demand of high data-rate in current wireless communications systems motivated us to investigate new rate-efficient channel coding techniques. In this dissertation, we study differential modulation for MIMO systems. Differential modulation is useful since it avoids the need of channel estimation by the receiver and saves valuable bandwidth with a slight symbol error-rate (SER) performance loss. The effect of channel correlation over differential MIMO system has not been studied in detail so far. It has been shown in the literature that a linear memoryless precoder can be used to improve the performance of coherent MIMO system over correlated channels. In this work, we implement precoded differential modulation for non-orthogonal and orthogonal space-time blocks codes (STBCs) over arbitrarily correlated channels. We design precoders based on pair-wise error probability (PEP) and approximate SER for differential MIMO system. The carrier offsets, which result because of the movement of the receiver or transmitter and/or scatterers, and mismatch between the transmit and receive oscillators, are a big challenge for the differential MIMO system. The carrier offsets make the flat fading channel behave as a time-varying channel. Hence, the channel does not remain constant over two consecutive STBC block transmission time-intervals, which is a basic assumption for differential systems and the differential systems break down. Double-differential coding is a key technique which could be used to avoid the need of both carrier offset and channel estimation. In this work, we propose a double-differential coding for full-rank and square orthogonal space-time block codes (OSTBC) with M-PSK ...

Contributors:

Prof. Are Hjørungnes

Year of Publication:

2008

Document Type:

Doctoral thesis ; Doktoravhandling ; [Doctoral and postdoctoral thesis]

Language:

eng

Subjects:

VDP::420

DDC:

620 Engineering & allied operations (computed) ; 621 Applied physics (computed)

Relations:

A. M. R. Bhatnagar, A. Hjørungnes, and L. Song, "Precoded Differential Orthogonal Space-Time Modulation over Correlated Ricean MIMO Channels", IEEE Journal of Selected Topics in Signal Processing, in the issue "MIMO-Optimized Transmission Systems for Delivering Data and Rich Content", volume 2, issue 2, pages 124 - 134, April 2008. The paper is not available in DUO. The published version is available at: http://dx.doi.org/10.1109/JSTSP.2008.920669 ; B. M. R. Bhatnagar, A. Hjørungnes, and L. Song, "Differential Coding for with Non-Unitary Constellations in Arbitrarily Correlated Rayleigh Channels," conditionally accepted for publication in IEEE Transactions on Wireless Communications (subject to reviewers’ and editors’ final approval of the revised version submitted 19-03-2008). The paper is not available in DUO. ; C. M. R. Bhatnagar, A. Hjørungnes, and L. Song, "Double Differential Orthogonal Space-Time Block Codes for Arbitrarily Correlated Rayleigh Channels with Carrier Offsets," conditionally accepted for publication in IEEE Transactions on Wireless Communications (subject to reviewers’ and editors’ final approval of the revised version under preparation). The paper is not available in DUO. ; D. M. R. Bhatnagar, A. Hjørungnes, and L. Song, "Cooperative Communications over Flat Fading Channels with Carrier Offsets: A Double-Differential Modulation Approach", EURASIP Journal on Advances in Signal Processing, in special issue on "Wireless Cooperative Networks", volume 2008, article ID 531786, 11 pages, The paper is not available in DUO. The published version is available at: http://dx.doi.org/10.1155/2008/531786 ; E. M. R. Bhatnagar, A. Hjørungnes, R. Bose, and L. Song, "Double-Differential Decode-and-Forward Cooperative Communications over Nakagami-m Channels with Carrier Offsets" in Proc. for Sarnoff Symposium 2008, pages 1-5, Princeton, NJ, USA, April 2008. The paper is not available in DUO. The published version is available at: http://dx.doi.org/10.1109/SARNOF.2008.4520082 ; http://dx.doi.org/10.1109/JSTSP.2008.920669 ; http://dx.doi.org/10.1155/2008/531786 ; http://dx.doi.org/10.1109/SARNOF.2008.4520082 ; Bhatnagar, Manav R. Differential Coding for MIMO and Cooperative Communications. Doktoravhandling, University of Oslo, 2008 ; http://hdl.handle.net/10852/9972 ; 83612 ; 082417962 ; Fulltext https://www.duo.uio.no/bitstream/handle/10852/9972/2/DUO_782_Bhatnagar.pdf

URL:

http://hdl.handle.net/10852/9972
http://urn.nb.no/URN:NBN:no-20127

Content Provider:

Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Flag of Norway