Telefonaktiebolaget Lm Ericsson (publ)

Universiteit Twente

Ericsson Technology Licensing Ab

Ericsson Radion Systems B.v.

Johannes Wilhelmus Eikenbroek

Paulus Thomas Maria Van Zeijl

Paul Klatser

Paulus Wilhelmus Leonardus Van Dijk

Chris Gerardus Hermanus Roeloffzen

Willem Paul Beeker

Leimeng Zhuang

Hendrikus Cornelis Nauta

Adrianus G Van Der Arend

A phased-array antenna that includes a photonic beamformer is disclosed. In some embodiments, a front stage of electrical-domain processing applies a 16-to-1 signal-combination ratio, a single stage of photonic beamforming applies a 4-to-1 signal-combination ratio, and a passive, electrical-domain, signal combiner applies a 32-to-1 signal-combination ratio.

Electronically-steered Ku-band phased array antenna comprising an integrated photonic beamformer

An output signal is generated for transmission in a telecommunications systems. This may involve generating an in-phase radio frequency signal by mixing an in-phase baseband signal with a first radio frequency mixer signal; and generating an alternative-phase radio frequency signal by mixing an alternative-phase baseband signal with a second radio frequency mixer signal. An output signal for transmission is generated by combining the in-phase radio frequency signal with the alternative-phase radio frequency signal, wherein the output signal has a frequency, f. The first and second radio frequency mixer signals are generated by generating a voltage controlled oscillator (VCO) output signal having a frequency, f, such that wherein n=1, 2, 3, . . . ; and generating one or more fractional frequency divided signals from the VCO output signal, wherein each of the one or more fractional frequency divided signals has a frequency equal to f.

Transceiver architecture with reduced VCO-pulling sensitivity

A method of generating a quantized signal in a Sigma-Delta modulator () comprises the steps of feeding a modulator input signal to a quantizer () via at least one integrator (); generating in the quantizer () a quantized signal; feeding back the quantized signal to be subtracted from the modulator input signal; and generating a dither signal to be applied to a point in the Sigma-Delta modulator. The dither signal is applied to a selected one of a number of different points () in the Sigma-Delta modulator () in dependence of a control signal. In this way a method of generating a quantized signal in a Sigma-Delta modulator is provided which provides optimal results for different modes of the application, such as phase modulation mode and frequency modulation mode in a Bluetooth receiver.

Apparatus comprising a sigma-delta modulator and method of generating a quantized signal-delta modulator

Phase-locked loop for signals having rectangular waveforms

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Emmen, Netherlands

Johannes Wilhelmus Eikenbroek