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Multiple-Symbol Differential Sphere Decoding Aided Amplify-and-Forward Differential Space-Time Modulation
 

Summary: Multiple-Symbol Differential Sphere Decoding Aided
Amplify-and-Forward Differential Space-Time Modulation
Chao Xu, Cong Liu, Soon Xin Ng and Lajos Hanzo
School of ECS, University of Southampton, SO17 1BJ, United Kingdom.
Email: {cx1g08,sxn,lh}@ecs.soton.ac.uk, http://www-mobile.ecs.soton.ac.uk
Abstract--Differential Space-Time Modulation (DSTM) employing
multiple antennas provides a diversity advantage in rich scattering envi-
ronments, whilst the excessive complexity of MIMO channel estimation
is avoided. However, due to size, cost or other hardware limitations,
the multiple antennas may be in deep fade simultaneously and hence
experience spatially correlated fading, which leads to a loss of diversity
gain. Hence in this paper, we design an Amplify-and-Forward (AF)
relaying aided DSTM scheme, which is capable of attaining a diversity
gain even when the source node is in deep fade. Furthermore, Multiple-
Symbol Differential Sphere Decoding (MSDSD) is developed for the
proposed scheme to avoid the potential performance degradation of the
noncoherent receiver in fast fading channels.
I. INTRODUCTION
Multiple-Input Multiple-Output (MIMO) systems, whose trans-
mitters and receivers are equipped with multiple antennas, provide

  

Source: Anderson, Jim - School of Mathematics, University of Southampton

 

Collections: Mathematics