Search

Showing total 1 results

Refine your results

1 results

1. Single-Symbol ML Decoding for Orthogonal and Quasi-Orthogonal STBC in Clipped MIMO-OFDM Systems Using a Clipping Noise Model with Gaussian Approximation.

Author

Zhefeng Li and Xiang-gen Xia

Subjects
*ORTHOGONAL frequency division multiplexing, *BROADBAND communication systems, *MULTIPLEXING, *SPREAD spectrum communications, *MIMO systems, *WIRELESS communications, *ALGORITHMS, *SIMULATION methods & models
Abstract

An efficient way to reduce the peak-to-average power ratio (PAPR) in OFDM systems is clipping. After the clipping in an MIMO-OFDM system, the additive noise may not be white. In this paper, we develop fast (single-symbol) ML decoding algorithms for orthogonal space-time block codes (OSTBC) and (linearly transformed) quasi orthogonal space- time block codes (QOSTBC) in clipped MIMO-OFDM systems by using a clipping noise model with Gaussian approximation. By using the statistics of the clipping distortions, our newly developed fast ML decoding algorithms improve the performance for clipped MIMO-OFDM systems with OSTBC and QOSTBC while the decoding complexities are not increased. Simulation results are presented to illustrate the improvement. [ABSTRACT FROM AUTHOR]

Published
2008
Full Text
View/download PDF