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540 IEEE COMMUNICATIONS LETTERS, VOL. 7, NO. 11, NOVEMBER 2003 A New High-Rate Differential Space-Time
 

Summary: 540 IEEE COMMUNICATIONS LETTERS, VOL. 7, NO. 11, NOVEMBER 2003
A New High-Rate Differential Space-Time
Block Coding Scheme
Naofal Al-Dhahir, Senior Member, IEEE
Abstract--A new high-rate differential space-time transmission
scheme based on spatial multiplexing of Alamouti-encoded infor-
mation streams is developed in this letter. At the receiver, joint
space-time differential interference cancellation and decoding is
performed, realizing diversity and rate gains, without requiring
channel knowledge or bandwidth expansion. Our focus is on the
case of two information streams with two transmit antennas per
stream on flat-fading channels for simplicity. However, the devel-
opment readily extends to more than two information streams, to
more than two transmit antennas per stream, and to frequency-se-
lective channels using previously published techniques.
Index Terms--Differential encoding, interference cancellation,
space-time block code (STBC), spatial multiplexing.
I. INTRODUCTION
THE ALAMOUTI space-time block code (STBC) for two
transmit antennas enjoys the following three main attrac-

  

Source: Al-Dhahir, Naofal - Department of Electrical Engineering, University of Texas at Dallas

 

Collections: Engineering