H - Electricity – 04 – L
Patent
H - Electricity
04
L
325/120
H04L 27/06 (2006.01) H03D 1/00 (2006.01) H03G 7/00 (2006.01) H04L 27/22 (2006.01) H04L 27/38 (2006.01)
Patent
CA 1315344
ABSTRACT OF THE DISCLOSURE The invention relates to a method and an arrangement intended for radio communication systems and effective in digi- talizing and subsequently processing numerically arbitrary radio signals. The signals are represented by composite (complex) vec- tors which have been subjected to disturbances in the system, such that information in the signals has been lost. This infor- mation is restored in its entirety when practising the present invention. For the purpose of solving this problem, the inven- tive digitalizing arrangement includes a multistage logarithmic amplifier chain in which each stage is connected to a separate detector, the output signals of which are added in an adder. The adder output signals are then transmitted to a first A/D-con- verter for digitalizing and converting the amplitude components of the signal. At the same time, the undetected signal from the staturated output stage in the amplifier chain is transmitted to a second A/D-converter for digitalizing and converting the phase components of the signal. The digital values obtained on the outputs of the AD-converters are applied to different inputs of a digital signal processor for numerical processing of the pairwise received digital values in a manner such as to restore the com- plete vector characteristic of the signal.
611776
Marks & Clerk
Telefonaktiebolaget Lm Ericsson
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