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Combined Spatial and Temporal Equalization
Using an Adaptive Antenna Array and a Decision
Feedback Equalization Scheme
Erik Lindskog,
Anders Ahlén
and
Mikael Sternad
IEEE International Conference on Acoustics, Speech
and Signal Processing, Detroit, MI, May 8-12, 1995.
© 1995 IEEE.
- Outline:
-
When digital data are transmitted over multipath radio channels,
the use of base station receivers with multiple antenna elements
can improve the performance significantly, if the measurements
are combined in an appropriate way. The paper studies
ways to perform this combination in TDMA systems.
A key problem is that a large number of filter coefficients
may have to be adjusted based on short training sequences.
- Abstract:
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The purpose of this paper is to investigate the use of
combined spatial and temporal equalization, in particular for short
training sequences. The
motivation for combining spatial and temporal equalization is
the existence of multipath propagation and co-channel interference.
Our main concern is to obtain good performance yet low
complexity. We will suggest a low complexity algorithm utilizing
a circular antenna array.
Although it has inferior performance in an asymptotic sense,
it turns out to be superior to the general solution for short
training sequences.
This conclusion is supported by simulations where
a number of algorithms are evaluated for different scenarios
involving co-channel interference.
- Related publications:
-
PhD Thesis by Erik Lindskog.
-
Licentiate Thesis
by E Lindskog 1995, which includes the paper.
Conference paper in IEEE VTC'95,
which investigates related algorithms.
- Source:
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Pdf, 202K.
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