Elsevier

Digital Signal Processing

Volume 17, Issue 1, January 2007, Pages 261-271
Digital Signal Processing

Generalized multichannel amplitude-and-phase coded modulation for differential space–time communications

https://doi.org/10.1016/j.dsp.2006.04.009Get rights and content

Abstract

We present a generalized multichannel amplitude-and-phase coded modulation scheme for differential space–time communications. Our scheme utilizes code matrices consisting of an amplitude and a phase component, which can be thought of as a space–time multichannel generalization of the scalar amplitude and phase shift keying (APSK) constellation. The amplitude component takes a scalar coefficient that controls the total transmission power, while the phase component is a unitary matrix formed from PSK symbols. Both the amplitude and phase components are differentially encoded and admit efficient differential decoding. We show that the maximum likelihood (ML) decoding of the amplitude coefficient and phase matrix is decoupled. Moreover, the phase matrix, when constructed from orthogonal designs, is amenable to decoupled differential decoding of the phase entries, which further simplifies the decoding complexity significantly. Simulation results show that the proposed amplitude–phase differential space–time coded modulation scheme achieves a performance close to its phase-only counterpart, while providing higher spectral efficiency offered by amplitude modulation.

Section snippets

Hongbin Li (M'99) received the B.S. and M.S. degrees from the University of Electronic Science and Technology of China (UESTC), Chengdu, in 1991 and 1994, respectively, and the Ph.D. degree from the University of Florida, Gainesville, FL, in 1999, all in electrical engineering.

From July 1996 to May 1999, he was a Research Assistant in the Department of Electrical and Computer Engineering at the University of Florida. He was a Summer Visiting Faculty Member at the Air Force Research Laboratory,

References (25)

  • F. Adachi et al.

    Decision feedback differential detection of differentially encoded 16APSK signals

    IEEE Trans. Commun.

    (1996)
  • S.M. Alamouti

    A simple transmit diversity techniques for wireless communications

    IEEE J. Selected Areas Commun.

    (1998)
  • S.N. Diggavi et al.

    Differential space–time coding for frequency-selective channels

    IEEE Commun. Lett.

    (2002)
  • S.N. Diggavi et al.

    Great expectations: The value of spatial diversity in wireless networks

    Proc. IEEE

    (2004)
  • G. Ganesan et al.

    Space–time block codes: a maximum SNR approach

    IEEE Trans. Inform. Theory

    (2001)
  • G. Ganesan et al.

    Differential detection based on space–time block codes

    IEEE Signal Process. Lett.

    (2002)
  • G. Ganesan et al.

    Differential detection based on space–time block codes

    Wireless Personal Commun.

    (2002)
  • G.H. Golub et al.

    Matrix Computations

    (1996)
  • A. Graham

    Kronecker Products and Matrix Calculus with Applications

    (1981)
  • B. Hassibi et al.

    Cayley differential unitary space–time codes

    IEEE Trans. Inform. Theory

    (2002)
  • B.M. Hochwald et al.

    Unitary space–time modulation for multiple-antenna communications in Rayleigh flat fading

    IEEE Trans. Inform. Theory

    (2000)
  • B.M. Hochwald et al.

    Differential unitary space–time modulation

    IEEE Trans. Commun.

    (2000)
  • Cited by (0)

    Hongbin Li (M'99) received the B.S. and M.S. degrees from the University of Electronic Science and Technology of China (UESTC), Chengdu, in 1991 and 1994, respectively, and the Ph.D. degree from the University of Florida, Gainesville, FL, in 1999, all in electrical engineering.

    From July 1996 to May 1999, he was a Research Assistant in the Department of Electrical and Computer Engineering at the University of Florida. He was a Summer Visiting Faculty Member at the Air Force Research Laboratory, Rome, NY, in the summers of 2003 and 2004. Since July 1999, he has been an Assistant Professor in the Department of Electrical and Computer Engineering, Stevens Institute of Technology, Hoboken, NJ. His current research interests include wireless communications, statistical signal processing, and radars.

    Dr. Li is a member of Tau Beta Pi and Phi Kappa Phi. He received the Harvey N. Davis Teaching Award in 2003 and the Jess H. Davis Memorial Award for excellence in research in 2001 from Stevens Institute of Technology, and the Sigma Xi Graduate Research Award from the University of Florida in 1999. He is an Editor for the IEEE Transactions on Wireless Communications and an Associate Editor for the IEEE Signal Processing Letters.

    Tao Li received the B.S. and M.S. degrees in computer science and the Ph.D. degree in electrical engineering from the University of Electronic Science and Technology of China (UESTC), Chengdu, China, in 1986, 1991, and 1995, respectively.

    From 1993 to 1994, he was a Visiting Scholar at the University of California, Berkeley. He is currently a Professor with the Department of Computer, Sichuan University, Chengdu, where he founded and directs the Laboratory of Computer Networks and Information Security. His research interests include computer networks, information security, artificial intelligence, neural networks, artificial immune system, computer communications, and wireless communications.

    This work was supported in part by the US Army Research Office under Grant DAAD19-03-1-0184, the US National Science Foundation under Grant CCF-0514938, and the National Natural Science Foundation of China under Grant 60502011.

    View full text