Huawei Technologies Co., Limited

Eprova Ag

Sergio Bianchi

Christian Mazzucco

Yanzhao Pang

Heinrich Bollinger

Xianfeng Li

Huaping Shi

Maurizio Mattivi

Francesco Lenoci

Ernst Felder

The present invention relates to the field of communications technologies and discloses a data processing method and apparatus to obtain a DPD non-linear distortion compensation coefficient under a QPSK mode. The embodiments of the present invention receive a first data flow, and perform interpolation into the first data flow to obtain a second data flow; receive a third data flow, and calculate a data flow signal quality difference between the third data flow and the second data flow; and obtain a DPD non-linear distortion compensation coefficient according to the data flow signal quality difference and the third data flow or the second data flow. The embodiments of the present invention are applicable to the scenarios of obtaining a DPD non-linear distortion compensation coefficient in QPSK mode.

Data processing method and apparatus

A signal processing apparatus for processing an input signal (x) has an adaptive predistorter, an amplifier and a down-converter. The amplifier is configured to amplify a processed signal (y') to obtain an amplified signal (y&#x2033;). The down-converter is configured to multiply a version of the processed signal (y&#x2032;) with a version of the amplified signal (y&#x2033;), one of the signal versions being phase shifted, to obtain a first down-converted signal (z, z&#x2032;), and to multiply the processed signal (y&#x2032;) with the amplified signal (y&#x2033;) to obtain a second down-converted signal (z, z&#x2032;). The predistorter is configured to predistort the input signal (x) according to a predistortion characteristic to obtain the processed signal (y&#x2032;), the predistorter being further configured to adapt the predistortion characteristic based on the first down-converted signal (z, z&#x2032;) and the second down-converted signal (zz&#x2032;).

Signal processing arrangement and signal processing method

A method for the synthesis of serinol and serinol derivatives substituted at the nitrogen atoms by reacting a lower 1,3-dialkoxy-isopropyl halide with ammonia or an amine to form a 1,3-dialkoxy-isopropylamine and then removing the ether groups by heating with a hydrogen halide acid. The method allows the production of serinol and serinol derivatives using inexpensive starting materials in a simple manner and obtaining a high purity product which is free of interfering isomers. Novel compounds obtained by the method which are useful as pharmaceutical intermediates, X-ray contrasting agents and cytostatic or psychopharmacological drugs are also disclosed.

Process for the preparation of serinol and of serinol derivatives, and

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Milan, Italy

Sergio Bianchi