Telefonaktiebolaget Lm Ericsson (publ)

Qamcom Technology Ab

Martin Sjödin

Jonas Hansryd

Patrik Olesen

Stefan Håkansson

Lei Bao

Mohamed Mustafa

Björn Gävert

Sahar Tahvili

Forough Yaghoubi

Erik Agrell

There is provided mechanisms for classifying microwave link data of a microwave system comprises a point-to-point wireless microwave link. The method is performed by a controller entity. The method comprises obtaining microwave link data in terms of a set of performance affecting values for the point-to-point wireless microwave link. Each performance affecting value in the set pertains to a respective performance affecting property of the point-to-point wireless microwave link. The method comprises classifying the microwave link data to operating conditions in a set of operating conditions, where each operating condition is associated with its own subset of the performance affecting properties, by for each operating condition, estimating a probability value using the performance affecting values of the subset of the performance affecting properties associated with that operating condition.

Classification of microwave link data

The method comprises sampling transport data received on the transport link to determine properties of the transport link. The method comprises detecting the disturbance of the transport link based on the determined properties of the transport link. The method comprises, responsive to the detecting the disturbance, determining, based on the sampled received transport data, the cause of the disturbance. The method further comprises, responsive to detecting the disturbance, refraining from transmitting an indication of the disturbance or transmitting the indication of the disturbance with an instruction for resolving the disturbance.

Disturbance detection for transport links

The present invention relates to a method and apparatus in a digital communication system that employs phase-aided adaptive modulation to overcome phase noise impairments. The transceiver is configured to transmit a message comprising channel symbols from a primary and a secondary set of channel symbols, wherein the primary set of channel symbols comprises channel symbols having different phase with respect to one another and the secondary set of channel symbols comprises only channel symbols with a fixed known phase.

Method and apparatus for phase-aided adaptive modulation

There is provided mechanisms for classifying microwave link data of a microwave system comprises a point-to-point wireless microwave link. A method is performed by a controller entity. The method comprises obtaining, in time windows, microwave link data in terms of signal quality measurement values and received power values for the point-to-point wireless microwave link. The method comprises classifying per time window, the microwave link data per time window to operating conditions in a set of operating conditions by, from the signal quality measurement values and received power values per time window, estimating probability values for each of the operating conditions according to a mapping, as learned through training, between pieces of microwave link data and operating conditions.

The present disclosure relates to a point to point radio link arrangement () comprising at least two link nodes (). A first link node () is arranged to obtain first link data (X) over a first carrier frequency, and a second link node() is arranged to obtain second link data (X) over a second carrier frequency separate from the first carrier frequency. The link arrangement () further comprises a classification unit () arranged to obtain the link data (X, X) from the link nodes () and to determine if the link data (X, X) are affected by either a frequency dependent disturbance event or by a frequency independentdisturbance event. This is accomplished by comparing the first link data (X) to the second link data (X) over a time window (T). The classification unit () is also arranged to output disturbance event decision data (Y) in dependence of whether the link data (X, X) have been determined to be affected by either a frequency dependent disturbance event or a frequency independent disturbance event.

Identifying disturbance events at point to point radio links

The present disclosure relates to a weather precipitation monitoring system () that comprises a weather monitoring unit (), a classification unit () and at least one point to point radio link (A,B,C). The classification unit () is arranged to obtain link data (X, X, XN) from the at least one point to point radio link, where the link data comprises received signal strength data associated with an operation of the at least one point to point radio link (A,B,C). The classification unit () is arranged to determine disturbance event data (Y, Y, YN) based on the link data indicating if the received signal strength data is affected by at least one point to point radio link than a precipitation event. The weather monitoring unit () is arranged to monitor precipitation in the geographical region () based on the link data (X, X, XN) obtained from the at least one point to point radio link (A,B,C) and on the disturbance event data (Y, Y, Y) obtained from the classification unit ().

Precipitation monitoring using point to point radio links

The present disclosure relates to an adaptive antenna radome heating system () for a point to point radio link, where the adaptive antenna radome heating system comprises a processing unit () and at least one point to point radio link transceiver (TRX) (A,B,C). Each TRX comprises an antenna radome () having an antenna radome heating device () configured to be activated by a control signal (R, R, RN). The processing unit () is arranged to determine an onset of accumulated precipitation on the antenna radome of the at least one TRX (A,B,C) and to activate the corresponding antenna radome heating device () by the control signal (R, R, RN) in response to determining the onset of accumulated precipitation.

Antenna radome heating for point to point radio links

There is provided a method for processing a set of input symbols. The method is performed by a transmitter. The method comprises acquiring a set of input symbols. The method comprises generating a set of precoded symbols from the set of input symbols by subjecting the set of input symbols to a coding vector. The method comprises generating a transmission signal comprising a sequence of pulse forms from the set of precoded symbols by pulse shaping the set of precoded symbols. The coding vector is based on a model vector modelling intersymbol interference experienced by the pulse forms.

Precoding in faster-than-nyquist communications

A method of transmitting data using electromagnetic waves, comprising the steps of providing () a first electromagnetic signal (S) having a first wavelength (&#x3bb;) and a second electromagnetic signal (S) having a second wavelength (&#x3bb;) different from the first wavelength; dividing () each of the first (S) and second (S) electromagnetic signals into a first polarization component (S; S) having a first polarization direction and a second polarization component (S; S) having a second polarization direction orthogonal to the first polarization direction; modulating () the first polarization component (S) of the first electromagnetic signal (S) to encode a first data stream (DS); modulating () the second polarization component (S) of the second electromagnetic signal (S) to encode a second data stream (DS); and transmitting () a combined electromagnetic signal (S) comprising the first and second polarization components of the first electromagnetic signal (S) and the first and second polarization components of the second electromagnetic signal (S).

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Gothenburg, Sweden

Martin Sjödin