[BELITZER, Alexander, SOGL, Bernhard] US,Santa Clara, CA 95054,2200 Mission College Boulevard; A method of calibrating parameters for a polar transmitter (Polar TX) system includes receiving phase information derived from transmission information in a Polar TX for producing a radio frequency (RF) broadcast signal. An Inphase local oscillator (LO_I) signal and a quadrature phase local oscillator (LO_Q) signal are derived from a combination of a first signal and the phase information using a digital phase lock loop. A feedback receiver (FBR) receives the RF broadcast signal provided by the Polar TX. The LO_I signal and the LO_Q signal are mixed with the RF broadcast signal to obtain mixer output signals. RF path delay and IQ phase imbalance are concurrently determined as a function of the first signal and of the mixer output signals.

[Jianqiang Rao, Zhibin Yu, Bernhard Sogl] US CA Santa Clara The present disclosure relates to an apparatus for a wireless communication system. The apparatus comprises transmitter circuitry configured to generate a transmit signal on an assigned radio channel, and transmitter feedback receiver circuitry coupled to the transmitter circuitry and configured to estimate an amount of transmit signal power that leaks into adjacent radio channels based on a fed back version of the transmit signal.

[NIU, Huaning, LI, Qiming, SOGL, Bernhard, ZHANG, Dawei, PATANE, Giuseppe, PARMAR, Jalpesh Manishbhai, SAMBHWANI, Sharad, TRACHT, Thorsten, YANG, Weidong, CHEN, Xiang, TANG, Yang] US,Cupertino, CA 95014,One Apple Park Way;

[HENZLER, Stephan, KRANZ, Christian, SCHUMACHER, Otto, SOGL, Bernhard] US,Santa Clara, CA 95054,2200 Mission College Blvd.;

[SCHRATTENECKER JOCHEN, SOGL BERNHARD, MENKHOFF ANDREAS, HUR JOONHOI, PRETL HARALD, MAYER CHRISTIAN, LANGER ANDREAS, VAZNY RASTISLAV] US

[Jochen Schrattenecker, Bernhard Sogl, Andreas Menkhoff, Joonhoi Hur, Harald Pretl, Christian Mayer, Andreas Langer, Rastislav Vazny] US CA Cupertino An electronic device may include radar circuitry. Control circuitry may calibrate the radar circuitry using a multi-tone calibration signal. A first mixer may upconvert the calibration signal for transmission by a transmit antenna. A de-chirp mixer may mix the calibration signal output by the first mixer with the calibration signal as received by a receive antenna or loopback path to produce a baseband multi-tone calibration signal. The baseband signal will be offset from DC by the frequency gap. This may prevent DC noise or other system effects from interfering with the calibration signal. The control circuitry may sweep the first mixer over the radio frequencies of operation of the radar circuitry to estimate the power droop and phase shift of the radar circuitry based on baseband calibration signal. Distortion circuitry may distort transmit signals used in spatial ranging operations to invert the estimated power droop and phase shift.

[BELITZER ALEXANDER, SOGL BERNHARD] US

[Stefan Glock, Bernhard Sogl, Jan-Erik Mueller] DE Nuernberg A controller for controlling a signal processor includes a transformation unit and a control unit. The transformation unit is configured to generate at least one amplitude-modulation-to-phase-modulation-distortion within a signal, output by using the signal processor according to a signal processing, based on generated at least one amplitude-modulation-to-amplitude-modulation-distortion of the signal. The control unit is configured to adjust the signal processing of the signal processor so as to minimize the at least one amplitude-modulation-to-phase-modulation-distortion.

[Alexander Belitzer, Bernhard Sogl] US CA Santa Clara A method of calibrating parameters for a polar transmitter (Polar TX) system includes receiving phase information derived from transmission information in a Polar TX for producing a radio frequency (RF) broadcast signal. An Inphase local oscillator (LO_I) signal and a quadrature phase local oscillator (LO_Q) signal are derived from a combination of a first signal and the phase information using a digital phase lock loop. A feedback receiver (FBR) receives the RF broadcast signal provided by the Polar TX. The LO_I signal and the LO_Q signal are mixed with the RF broadcast signal to obtain mixer output signals. RF path delay and IQ phase imbalance are concurrently determined as a function of the first signal and of the mixer output signals.

[CAMUFFO ANDREA, GOE CHI-TAO, MUELLER JAN-ERIK, PINARELLO SANDRO, SHUTE NICK, SOGL BERNHARD] DE