Alcatel Lucent

Alcatel

Thomas Bohn

Dirk Wiegner

Xin Yu

Heinz Schlesinger

Andreas Pascht

Gerhard Luz

Jens Strauss

Gabriele Schwoerer

Christoph Haslach

Thomas Bitzer

Jörg Schaepperle

Robin Machinal

Embodiments relate to a multiband transceiver apparatus (), comprising a first transmit path () operable to transmit a first transmit signal (sig) in a first radio frequency band (RF), wherein the first transmit path () comprises an input (), an output () and a first feedback path () from the output towards the input of the first transmit path, a second transmit path () operable to transmit a second signal (sig) in a second radio frequency band (RF), the second radio frequency band (RF) being different from the first radio frequency band (RF), wherein the second transmit path () comprises an input (), an output () and a second feedback path () from the output towards the input of the second transmit path, and a cross-talk canceller () operable to cancel cross-talk from the second feedback path () to the first feedback path () and/or to cancel cross-talk from the first feedback path () to the second feedback path () of the multiband transceiver apparatus ().

Cross-talk cancellation in a multiband transceiver

The invention relates to a method for amplifying a carrier signal (CS) by using a power amplifier (PA), the power amplifier (PA) is feed with a supply voltage (PASV) of a power supply (SMPS). The method comprises the step of adapting a value of the supply voltage (PASV) to a value related to a mean signal power of an input signal (DS) of a power amplifier system (PAS).

Method for amplifying a signal by a power amplifier, power amplifier system, device, computer program product, and digital storage medium thereof

Method of correcting a gain and phase imbalance of an analogue modulator () for multiple channels (CHi) of a multi-carrier transmission signal, the method comprising the steps of determining a gain imbalance correction factor (GCFi) and phase imbalance correction factor (PCFi) for each channel individually and applying said correction factors (GCFi, PCFi) to the corresponding channel (CHi) individually, before the multi-carrier synthesis of the channels is done, whereas step a) for each one of the multiple channels (CHi) is performed in a time-multiplexed manner with step a) for the other ones of the multiple channels (CHi).

Method of correcting gain and phase imbalance of a multi-carrier transmission signal, transmitter and base station

The present invention relates to a method of influencing an input signal (x), in particular an input signal of a power amplifier of a wireless communication system, wherein said input signal (x) has a range of input amplitudes (r, . . . , r), wherein a correction signal (&#x393;(x)) depending on said input signal (x) is generated, and wherein said input signal (x) is influenced depending on said correction signal (&#x393;(x)). A generation of said correction signal (&#x393;(x)) is based on a plurality of base functions (&#x3c6;, &#x3c6;, . . . , &#x3c6;), and said range of input amplitudes (r, . . . , r) is divided into intervals (r,r),(r,r), . . . ,(r,r), wherein each of said base functions (&#x3c6;, &#x3c6;, . . . , &#x3c6;) contributes to said correction signal (&#x393;(x)) in a limited number of intervals ((r,r),(r,r), . . . ,(r,r)). Thus it is possible to change parts of the correction signal by adapting some of said base functions without influencing the whole correction signal.

Method of influencing an input signal and predistorter

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Stuttgart, Germany

Thomas Bohn