Telefonaktiebolaget Lm Ericsson (publ)

Optis Wireless Technology, LLC

Interdigital Patent Holdings, Inc.

Idtp Holdings, Inc.

Lars Sundström

Bengt Lindoff

Robert Baldemair

Stefan Parkvall

Leif Wilhelmsson

Ning He

Andres Reial

Dennis Hui

Ali S Khayrallah

Johan Furuskog

Torgny Palenius

Karl Werner

Mikael Coldrey

Shehzad Ali Ashraf

Lars Manholm

Ulf Gustavsson

Gunnar Mildh

Icaro L J Da Silva

Johan Rune

Fredrik Gunnarsson

Jinhua Liu

Yi-Pin Eric Wang

Erik Bengt Dahlman

Jari Tapio Vikberg

Erik A Eriksson

Pål Frenger

Henrik Sahlin

Stefan Wager

Martin Hessler

Magnus Stattin

Sven Oscar Petersson

Joakim Axmon

Karl Norrman

Qianxi Lu

Qingyu Miao

Johan Torsner

Pradeepa Ramachandra

Gabor Fodor

Fredrik Athley

Janne Peisa

Joachim Sachs

Kumar Balachandran

Gen Li

Claes Tidestav

Thorsten Lohmar

Zhang Zhang

Bo Hagerman

Osman Nuri Can Yilmaz

Niclas Wiberg

Lars Lindbom

Jonas Fröberg Olsson

Niklas Johansson

Jianfeng Wang

Hai Feng Wang

Zhan Zhang

Peter Alriksson

Andreas Bergström

Jose Luis Pradas

Pontus Wallentin

Patrik Rugeland

Henrik Asplund

Martin Johansson

Patrik Torgny Karlsson

Johan Axnäs

Mårten Ericson

Jonas Kronander

Fredrik Lindqvist

Reza Moosavi

Fenghao Mu

Dennis Sundman

Mikael Prytz

Håkan Axelsson

Yngve Selén

Andreas Cedergren

Nadia Brahmi

Niklas Jaldén

Jonas Medbo

Ali El Essaili

Elena Myhre

Hugo Tullberg

Jörg Huschke

Emma Wittenmark

Virgile Garcia

Peter Von Wrycza

Rui Fan

Walter Müller

Anders Furuskär

Håkan Björkegren

Henrik Sjöland

Stefan Mikael Andersson

Edgar Ramos

Sven Erik Mattisson

Johan Nilsson

Anders Wallén

Magnus Åström

Bo Lincoln

Ylva Jading

Ghyslain Pelletier

Miguel Lopez

Ali Nader

A successive approximation register analog-to-digital converter (SAR ADC) is disclosed, which is configured to receive an analog input signal and provide a digital output signal. The SAR ADC comprises a capacitor bank for successively providing a plurality of signal levels based on a sample value of the analog input signal, wherein each signal level of the plurality is an indicator for a corresponding bit in a corresponding sample of the digital output signal. Furthermore, the SAR ADC comprises controlling circuitry configured to cause the capacitor bank to provide the plurality of signal levels representing a dynamically scaled version of the sample value of the analog input signal. In some embodiments, a respective selector of each capacitor of the capacitor bank is controlled to charge the capacitor using either the sample value of the analog input signal or the sample value of an opposed version of the analog input signal. The setting of the respective selectors corresponds to a digital representation of a scaling value (e.g., a sample value of an oscillator signal) for the dynamically scaled version of the sample value of the analog input signal. Corresponding method, receiver, and wireless communication device are also disclosed.

Successive approximation register analog-to-digital converter

Methods and apparatus in a fifth-generation wireless communications network, including an example method, in a wireless device, that includes determining a reporting quality threshold for a parameter related to channel state information (CSI); performing a measurement for each of a plurality of beams from a first predetermined set of beams for evaluation; evaluating the measurement for each of the plurality of beams against the reporting quality threshold; discontinuing the performing and evaluating of measurements in response to determining that the reporting quality threshold is met for one of the beams, such that one or more beams in the first predetermined set of beams are not measured and evaluated; and reporting, to the wireless communications network, CSI for the one of the beams.

Network architecture, methods, and devices for a wireless communications network

A beamforming apparatus () performs beamforming via a plurality of antenna elements () by using per-branch sign reversal circuits () that approximate the per-branch phase values associated with a particular beam direction or shape by selectively reversing or not reversing the polarities of the individual branch signals (). Eliminating continuous-valued or high-resolution phasing control from the branch circuits () that are fed into or from the respective antenna elements () simplifies the branch circuitry, thereby reducing the physical space needed for the branch circuits () and reducing loss and noise within the branch circuits (). Further, operating the plurality of antenna elements () as two or more groups () and controlling the differential phase between the groups () advantageously reduces the errors arising from the approximation of the per-branch phase values.

Beamforming method and apparatus

An apparatus for a multi-antenna transceiver is disclosed. The multi-antenna transceiver has a plurality of antenna elements connected to respective transceiver chains. Each transceiver chain includes a frequency converter operated using a respective local oscillator signal provided by a respective phase-locked loop. The apparatus includes a controller configured to cause control of the respective phase-locked loop of one or more transceiver chain to generate the respective local oscillator signal with a respective phase offset for mitigation of local oscillator leakage through the frequency converter. In some embodiments, the controller is further configured to cause, for each transceiver chain with a non-zero respective phase offset, a corresponding phase adjustment of a signal for frequency conversion. Corresponding multi-antenna transceivers, wireless communication devices and methods are also disclosed.

Mitigation of local oscillator leakage

A network node and a wireless device for operation in a wireless communication network, wherein it is determined that a second scheduling bandwidth is needed, based on an amount or type of data buffered for transmission to the wireless device. Reconfiguration of a receiver bandwidth of the wireless device is initiated to match the second scheduling bandwidth, wherein the second scheduling bandwidth is larger than a first scheduling bandwidth currently associated with the wireless device, and wherein the rust and second scheduling bandwidths respectively define the bandwidth used for scheduling transmissions to the wireless device. Methods and computer programs therefor are also disclosed.

Method and apparatus for adaptive bandwidth usage in a wireless communication network

Methods and apparatus in a fifth-generation wireless communications, including an example method, in a wireless device, that includes receiving a downlink signal comprising an uplink access configuration index, using the uplink access configuration index to identify an uplink access configuration from among a predetermined plurality of uplink access configurations, and transmitting to the wireless communications network according to the identified uplink access configuration. The example method further includes, in the same wireless device, receiving, in a first subframe, a first Orthogonal Frequency-Division Multiplexing (OFDM) transmission formatted according to a first numerology and receiving, in a second subframe, a second OFDM transmission formatted according to a second numerology, the second numerology differing from the first numerology. Variants of this method, corresponding apparatuses, and corresponding network-side methods and apparatuses are also disclosed.

A phase-locked loop comprises a voltage controlled oscillator. The voltage controlled oscillator comprises an inductor and a capacitor, connected in parallel, and also connected in parallel therewith, a negative resistance structure. A first terminal of the negative resistance structure is connected to respective first terminals of the inductor and the capacitor. A second terminal of the negative resistance structure is connected to respective second terminals of the inductor and the capacitor. The negative resistance structure exhibits a tunable capacitance, such that a frequency of an output of the voltage controlled oscillator can be tuned by a control input signal, and the control input signal is generated in the phase-locked loop. The negative resistance structure comprises first and second transistors. There is a first conduction path between the first terminal of the first transistor and the control terminal of the second transistor, and a second conduction path between the control terminal of the first transistor and the first terminal of the second transistor. The control terminal of at least one of the first and second transistors is biased by the control input signal, such that a parasitic capacitance of said at least one of the first and second transistors can be tuned by the control input signal, in order to tune the frequency of the output of the voltage controlled oscillator, and hence the frequency of oscillation of the phase-locked loop.

Phase-locked loop

An electronic device comprises a first feedback circuit operatively connected to an amplitude detector and a first control input of an oscillator. The first feedback circuit is configured to control an amplitude of an output of the oscillator by continuously applying a first control signal to the first control input in response to an amplitude detected by the amplitude detector. The electronic device further comprises a second feedback circuit operatively connected to the amplitude detector and a second control input of the oscillator. The second feedback circuit is configured to modify one or more amplitude regulating parameters of the oscillator by providing a second control signal in response to the amplitude being beyond an upper or lower amplitude threshold, and refrain from modifying the one or more amplitude regulating parameters when the amplitude is within the upper and lower amplitude thresholds.

Low-noise oscillator amplitude regulator

A method of scheduling wireless data transmissions between a mobile terminal () and a base station using multiple component carrier signals is disclosed. The method comprises the steps of: receiving in the mobile terminal information from the base station indicating available component carriers; detecting in the mobile terminal at least one dynamic parameter indicative of the mobile terminal's current ability to handle component carriers having non-contiguous bandwidths; determining in the mobile terminal in dependence of the at least one dynamic parameter which of the available component carriers to utilize; and transmitting from the mobile terminal to the base station information indicating the component carriers determined to utilize. By doing this the mobile terminal may choose to limit the number of component carriers used in situations where it is disadvantageous, such as situations where the power consumption of supporting multiple component carriers is high or situations where complex hardware is needed.

Scheduling data transmissions between a mobile terminal and a base station in a wireless communications network using component carriers

A Successive Approximation Register, SAR, Analog to Digital Converter, ADC, () achieves high speed and accuracy by (1) alternating at least some decisions between sets of comparators having different accuracy and noise characteristics, and (2) unevenly allocating redundancy (in the form of LSBs of range) for successive decisions according to the accuracy/noise of the comparator used for the preceding decision. The redundancy allocation is compensated by the addition of decision cycles. Alternating between different comparators removes the comparator reset time (treset) from the critical path, at least for those decision cycles. The uneven allocation of redundancy&#x2014;specifically, allocating more redundancy to decision cycles immediately following the use of a lower accuracy/higher noise comparators&#x2014;compensates for the lower accuracy and prevents the need for larger redundancy (relative to the full-scale range of a decision cycle) later in the ADC process.

SAR ADC with alternating low and high precision comparators and uneven allocation of redundancy

A radio transmitter circuit () for transmitting signals within an uplink or sidelink frequency band of a cellular communications system is disclosed. It comprises a signal-generation circuit () configured to generate a transmission signal to be transmitted, and a radio front-end circuit (), connected to the signal-generation circuit () at an input of the radio front-end circuit (), for receiving the transmission signal, and configured to be connected to an antenna () at an output of the radio front-end circuit and to transmit the transmission signal to a remote node via said antenna (). The signal-generation circuit () is configured to select a distortion function (D, D) based on a location of an allocated radio frequency resource, within said uplink or sidelink frequency band, for the transmission signal. Furthermore, the signal-generation circuit () is configured to generate an intermediate transmission signal, based on information to be transmitted in the transmission signal. Moreover, the signal-generation circuit () is configured to generate the transmission signal by applying the distortion function (D, D) to the intermediate transmission signal.

Allocation-based distortion function selection

A frequency generation solution controls an oscillator amplitude using two feedback paths to generate high frequency signals with lower power consumption and lower noise. A first feedback path provides continuous control of the oscillator amplitude responsive to an amplitude detected at the oscillator output. A second feedback path provides discrete control of the amplitude regulating parameter(s) of the oscillator responsive to the detected oscillator amplitude. Because the second feedback path enables the adjustment of the amplitude regulating parameter(s), the second feedback path enables an amplifier in the first feedback path to operate at a reduced gain, and thus also at a reduced power and a reduced noise, without jeopardizing the performance of the oscillator.

A method of a wireless transmitter is disclosed. The method is for mitigation of distortion caused by non-linear hardware components of the transmitter, wherein mitigation of distortion comprises mitigating at least one intermodulation component, wherein the transmitter is configured to process an input signal having an input signal spectrum, and wherein the transmitter comprises two or more signal branches, each signal branch comprising a respective non-linear hardware component. The method comprises modifying the input signal for a first one of the signal branches by applying a first phase shift to a first part of the input signal spectrum, wherein the first phase shift has a first sign and a first absolute value, and applying a second phase shift to a second part of the input signal spectrum. The second phase shift has a second sign which is opposite to the first sign, and a second absolute value which is equal to the first absolute value. The first and second parts are non-overlapping. The method also comprises modifying the input signal for a second one of the signal branches by applying the first phase shift to the second part of the input signal spectrum, and applying the second phase shift to the first part of the input signal spectrum. The method further comprises feeding the modified input signals to respective ones of the signal branches. Corresponding apparatus, wireless transmitter, communication device, and computer program product are also disclosed.

Mitigation of intermodulation distortion

An ADC includes a plurality of sub ADCs configured to operate in a time-interleaved manner and a sampling circuit configured to receive an analog input signal of the ADC, wherein the sampling circuit is common to all sub ADCs. The ADC includes a test signal generation circuit configured to generate a test signal for calibration of the ADC. The sampling circuit has a first input configured to receive the analog input signal and a second input configured to receive the test signal. The sampling circuit includes an amplifier circuit and a first feedback switch connected between an output of the amplifier circuit and an input of the amplifier circuit. The first feedback switch is configured to be closed during a first clock phase and open during a second clock phase, which is non-overlapping with the first clock phase.

Time-interleaved analog-to-digital converter

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Södra Sandby, Sweden

Lars Sundström