Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
1999-09-13
2003-08-05
Maung, Nay (Department: 2681)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S320000, C370S321000, C370S441000, C370S442000, C455S552100, C455S553100, C455S550100, C375S148000, C375S149000, C375S150000
Reexamination Certificate
active
06603749
ABSTRACT:
BACKGROUND OF THE INVENTION
The invention proceeds from a method for estimation of an impulse response of a signal transmission channel and a mobile station in accordance with the generic class of the independent patent claims.
According to the not yet published German patent application DE 198 26 036 it is already known to suppress distortions of a radio signal caused by multipath reception. Thereby, especially at a transmission of a radio signal in a code division multiple access (CDMA) transmission mode from a base station to a mobile station, an impulse response of a corresponding transmission channel for the multipath reception is estimated.
SUMMARY OF THE INVENTION
The method for estimation of an impulse response of a signal transmission channel and the mobile station having the characterizing features of the independent patent claims have the advantage that the complexity of the mobile station can be reduced, since there only needs to be one combined channel estimator and one channel estimation routine for the code division multiple access (CDMA) transmission mode and the time division multiple access (TDMA) transmission mode. Therefore, the implementation of a dual mode mobile station which can be used for the CDMA transmission mode as well as for the TDMA transmission mode is simplified.
The features of the dependent patent claims enable further improvement of the invention.
REFERENCES:
patent: 5615208 (1997-03-01), Hagmanns
patent: 5668837 (1997-09-01), Dent
patent: 5903610 (1999-05-01), Skold et al.
patent: 5995499 (1999-11-01), Hottinen et al.
patent: 6064689 (2000-05-01), Vollmer et al.
patent: 6144710 (2000-11-01), Chen et al.
patent: 6269126 (2001-07-01), Toskala et al.
patent: 6339612 (2002-01-01), Stewart et al.
patent: 198 26 036 (1999-12-01), None
Communication Systems 2nd Ed. Simon Haykin,1983 Adaptive Filter Theory 2nf/d Ed. Simon Haykin, 1991 Digital Communications 3rd Ed. John G. Proakis 1995.
Maung Nay
Robert & Bosch GmbH
Striker Michael J.
Trinh Sonny
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