Infineon Technologies Ag

Rohde and Schwarz Gmbh & Co. Kg

Jochen Kraus

Ingo Volkening

Gunther Fenzl

Cornelis Jan Kikkert

An approach for the graphic display of I/Q values of a baseband signal by means of a constellation diagram is provided. The approach comprises: selecting a subset of I/Q values from a set of I/Q values of a baseband signal, wherein the non-selected I/Q values of the set form a non-selected subset; calculating a frequency of occurrence of each I/Q value of the selected subset; assigning display information to each I/Q value of the selected subset, wherein the display information at least corresponds to the respective frequency of occurrence; and displaying, on a display device, the set of I/Q values of the baseband signal in a constellation diagram, based at least in part on the display information, wherein the I/Q values of the non-selected subset is displayed in a different manner from the I/Q values of the selected subset.

Method and apparatus for graphic display of I/Q values of a baseband signal

A method transfers data between a memory and peripheral units. The method includes assigning priorities to the data to be transferred, and transferring the data by direct memory access (DMA) control between the memory and the peripheral units in conformity with the priorities assigned in each case.

Transferring data between a memory and peripheral units employing direct memory access control

A DSL communication apparatus with lifeline functionality is provided, the DSL communication apparatus () in particular being suitable for CVoDSL ('Channelized Voice over Digital Subscriber Line') transmission. The DSL communication apparatus () comprises a central processing unit () which detects a local power failure state of a local power supply unit () being associated with the DSL communication apparatus (). In this case, the central processing unit () changes the operation of the DSL communication apparatus () from a normal operation mode to an intermediate operation mode, generates an interrupt for stopping a voice coprocessor unit (), initializes a download of a lifeline operation firmware from a FLASH memory () to the voice coprocessor unit (), and then starts a new initialization of the voice coprocessor unit (). Thereafter, the central processing unit () changes the operation of the DSL communication apparatus () from the intermediate operation mode to the lifeline operation mode by switching the power supply of the DSL communication apparatus () from the local power supply unit () to an auxiliary power supply unit () being coupled to the transmission line ().

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Munich, Germany

Jochen Kraus