Telefonaktiebolaget Lm Ericsson (publ)

Kekeqihuo (shenzhen) Technologies Co., Ltd.

Keke Zu

Iana Siomina

Torbjörn Wigren

Miguel Berg

Chenguang Lu

Per-Erik Eriksson

Eduardo Lins De Medeiros

Aldebaro Klautau

André Mendes Cavalcante

Igor Almeida

Francisco Müller

A method () for indoor positioning or navigation comprises obtaining () a set of features which describe characteristics of a place in an indoor space. This obtained set of features may describe characteristics of a place at which a wireless device is located, a place targeted by a wireless device as a destination, or a place targeted by a wireless device to avoid. Regardless, the method () further comprises comparing () the obtained set of features to addresses of respective indoor blocks into which the indoor space is spatially divided. Each indoor block in this regard is identified as being located at an address formed from a set of features which describe characteristics of the indoor block. The method () also comprises determining (), based on the comparing, which of the indoor blocks corresponds to the place in the indoor space.

Method and apparatus for indoor mapping, positioning, or navigation

The core inventive points of this patent are the verification of a purchasing activity for a crowdsourcing based system and/or platform. There are two main aspects, the verification of purchasing certification from two sources and the verification of the implemented purchasing actions. The system respectively obtains the purchase proof from the implementing user and the purchase certification from the corresponding business owner. A comparison process is implemented to verify whether these two sources of purchase certification can be matched with each other. Furthermore, an address obtaining process is triggered when pre-defined user responses and/or actions were received to generate one or multiple obtained address associated with timestamp. And one or multiple extracted purchase addresses is obtained by respectively extract purchase address from the two sources of purchase certificate. The verification of the implemented purchasing action is implemented by comparing the obtained purchasing address with the extracted purchase address.

System and method of purchase verification for crowdsourcing referral

It is provided a method for compressing beamspace coefficients to be applied when transferring data between a radio network node and a specific user device, the method being performed in a coefficient encoder and comprising the steps of: obtaining beamspace coefficients, wherein each beamspace coefficient comprises a complex value and a direction; determining at least one cluster based on proximity, in a complex plane, of the complex values of the beamspace coefficients; determining, for each beamspace coefficient, a cluster to which it belongs; determining a representative complex value for each one of the at least one cluster; outputting the representative complex values for each cluster; and outputting, for each beamspace coefficient, an identity of the cluster to which the beamspace coefficient belongs.

Compressing and decompressing beamspace coefficients

Systems and methods for determining non-linear precoding coefficients are disclosed. In some embodiments, a method of determining non-linear precoding coefficients for transmitting at least one frequency tone on lines includes obtaining a channel matrix that relates an input of the lines to an output of the lines for the at least one frequency tone. The method also includes computing a metric for each line in a subset of the lines and determining a line order for the subset of the lines based on the metric for each line in the subset of the lines. The method also includes reordering elements of the channel matrix based on the line order for the subset of the lines to create a reordered channel matrix and determining the non-linear precoding coefficients based on the reordered channel matrix. This may provide a systematic way to sort lines and balance the bit rates between different lines.

Systems and methods for determining non-linear precoding coefficients

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Solna, Sweden

Keke Zu