| 摘要 |
The invention relates to a method and an arrangement intended for radio communication systems and effective in digitalizing and subsequently processing numerically arbitrary radio signals. The signals are represented by composite (complex) vectors which have been subjected to disturbances in the system, such that information in the signals has been lost. This information is restored in its entirety when practising the present invention. For the purpose of solving this problem, the inventive 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 complete vector characteristic of the signal. |
