【資料名稱】：Coherent Space Time Shift Keying MIMO scheme

【資料作者】：Shen Chen

【資料日期】：2010-11

【資料語言】：英文

【資料格式】：PDF

【資料目錄和簡(jiǎn)介】：

Motivated by the recent concept of Spatial Modulation
(SM), we propose a novel Space-Time Shift Keying (STSK)
modulation scheme for Multiple-Input Multiple-Output (MIMO)
communication systems, where the concept of SM is extended
to include both the space and time dimensions, in order to
provide a general shift-keying framework. More specifically, in
the proposed STSK scheme one out of .. dispersion matrices
is activated during each transmitted block, which enables us
to strike a flexible diversity and multiplexing tradeoff. This is
achieved by optimizing both the space-time block duration as
well as the number of the dispersion matrices in addition to the
number of transmit and receive antennas. We will demonstrate
that the resultant equivalent system model does not impose any
Inter-Channel Interference (ICI), and hence the employment
of single-stream Maximum Likelihood (ML) detection becomes
realistic at a low-complexity. Furthermore, we propose a Differential
STSK (DSTSK) scheme, assisted by the Cayley unitary
transform, which does not require any Channel State Information
(CSI) at the receiver. Here, the usual error-doubling, caused
by the differential decoding, gives rise to 3-dB performance
penalty in comparison to Coherent STSK (CSTSK). Additionally,
we introduce an enhanced CSTSK scheme, which avoids the
requirement of Inter-Antenna Synchronization (IAS) between the
RF chains associated with the transmit Antenna Elements (AEs)
by imposing a certain constraint on the dispersion matrix design,
where each column of the dispersion matrices includes only a
single non-zero component. Moreover, according to the turbocoding
principle, the proposed CSTSK and DSTSK schemes
are combined with multiple serially concatenated codes and
an iterative bit-to-symbol soft-demapper. More specifically, the
associated STSK parameters are optimized with the aid of
EXtrinsic Information Transfer (EXIT) charts, for the sake of
achieving a near-capacity performance.