Making SMI-Beamforming Insensitive to the Sampling
Timing for GSM Signals
6th International IEEE Symposium on Personal,
Indoor and Mobile Radio Communications (PIMRC'95),
Toronto, Canada, September 27-29 1995, pp 664-668.
© 1995 IEEE.
Beamforming with the Sample Matrix Inversion method (SMI),
using an antenna array, is considered for a GSM-signal.
The problem of generating the reference signal from
the training sequence is addressed. As the proper reference signal to
be used varies with the sampling timing within the symbol
interval, a modified SMI method is
proposed that uses a ``variable'' reference signal.
When working with
a short training sequence, as in GSM, the performance of
the standard SMI beamforming method is shown to degrade
when there is an
offset from the sampling instant that the reference signal was
designed for. The proposed modified SMI method, however, is shown
to be more or less insensitive to where in the symbol
interval the sampling takes place.
The proposed method achieves a
better mean performance, averaged uniformly over one
- Related publications:
PhD Thesis by Erik Lindskog.
by E Lindskog 1995, which includes the paper.
Conference paper Asilomar 95,
on estimating co-channel interference from adjacent frames.
Postscript, 143K ;