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A Taxonomy of Space-Time Processing for Wireless
Networks
Arogyaswami J. Paulraj,
Stanford University, and
Erik Lindskog
, Uppsala University
IEE Proceedings on Radar, Sonar and Navigation,
vol 145, no 1, February 1998.
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Outline:
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Cellular radio signal processing functions include
modulation/demodulation,
channel coding/decoding, equalization and diversity
combining. These functions are performed by the radio modem.
Current cellular radio modems do not, however, efficiently exploit the
spatial dimension offered by multiple antennas.
The spatial domain can
be used to reduce co-channel interference (CCI), increase diversity
gain, improve array gain, and reduce intersymbol interference
(ISI). These improvements can have significant impact on the overall
performance of a wireless network. Modems that operate
with multiple antennas in receive and in transmit can exploit the
spatial domain by performing {\it space-time processing} (STP).
Receive STP improves signal to interference ratio through
CCI cancellation, mitigates fading through
improved receive diversity, offers higher signal to noise ratio
through array gain and reduces ISI through spatial equalization.
Likewise, transmit STP reduces CCI generation, improves transmit
diversity and in some cases also minimizes ISI generation.
In this paper, we present a taxonomy of space-time processing.
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Abstract:
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A taxonomy of space-time signal processing for wireless networks is
presented.
The taxonomy is addressed in terms of architectural and algorithmic
classification and
the influence of the propagation channel on the space-time processing is
discussed.
The architecture is classified according to link structure, channel
reuse and multiple
access scheme. Algorithms are classified into channel estimation
methods, TDMA and CDMA
receive algorithms and space-time transmit algorithms.
Finally the effects of Doppler spread, delay spread and angle spread on
space-time processing
are discussed.
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Related publications:
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PhD Thesis by Erik Lindskog.
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Licentiate Thesis by Erik Lindskog.
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PhD Thesis by Claes Tidestav.
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Source:
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Postscript, 480K (A4) ;
Postscript, 480K (Letter)
- In Pdf, 590K (A4) ;
In Pdf, 590K (Letter)
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