Unitary differential space-time-frequency codes for MB-OFDM UWB wireless communications

L. C. Tran, A. Mertins, Tadeusz A Wysocki

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In a multiple-input multiple-output (MIMO), multiband orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) system, coherent detection requires the transmission of a large number of symbols for channel estimation, thus reducing the bandwidth efficiency. For the first time, this paper proposes unitary differential space-time-frequency codes (DSTFCs) for MB-OFDM UWB communications, which increase the system bandwidth efficiency because no channel state information (CSI) is required. The proposed system would be useful when CSI is unavailable at the receiver, such as when the transmission of multiple channel estimation symbols is impractical or uneconomical. The coding and decoding algorithms for the proposed DSTFCs are then derived for both constant envelope modulation scheme, such as PSK (phase shift keying) and 4QAM (quadrature amplitude modulation), and multi-dimensional modulation scheme, such as DCM (dual carrier modulation). The paper also quantifies for the first time the diversity order of a DSTFC MB-OFDM system. Simulation results show that the application of DSTFCs can significantly improve the bit error performance of conventional differential MB-OFDM system (without MIMO), and even provide much better bit error performance than the conventional coherent MB-OFDM system (without MIMO) at high signal-to-noise ratios.

Original languageEnglish (US)
Article number6409504
Pages (from-to)862-876
Number of pages15
JournalIEEE Transactions on Wireless Communications
Volume12
Issue number2
DOIs
StatePublished - Jan 15 2013

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Orthogonal Frequency Division multiplexing (OFDM)
Wireless Communication
Ultra-wideband (UWB)
Orthogonal frequency division multiplexing
Space-time
Communication
Multiple-input multiple-output (MIMO)
Channel state information
Modulation
Channel estimation
Channel Estimation
Channel State Information
Bandwidth
Phase shift keying
Coherent Detection
Quadrature amplitude modulation
Quadrature Amplitude Modulation
Decoding
Signal to noise ratio
Phase Shift

Keywords

  • DSTFC
  • MB-OFDM
  • MIMO
  • STFC
  • UWB

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

Unitary differential space-time-frequency codes for MB-OFDM UWB wireless communications. / Tran, L. C.; Mertins, A.; Wysocki, Tadeusz A.

In: IEEE Transactions on Wireless Communications, Vol. 12, No. 2, 6409504, 15.01.2013, p. 862-876.

Research output: Contribution to journalArticle

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