Abstract: A method of transmitting a signal in a wireless communication network from a transmitting device to a receiving device, wherein said receiving device comprises an Analog to Digital Converter, ADC, arranged to sample a received signal at a predetermined sampling frequency. The method comprising the steps of generating 20, by said transmitting device, said transmission signal, wherein a bandwidth of said transmission signal is such that aliasing components will be created by said ADC upon sampling said transmission signal, and wherein said transmission signal is generated in such a way that the aliasing components have a same phase as a corresponding sampled low frequency component of said transmission signal thereby contributing constructively to said low frequency component of said transmission signal, and transmitting 40, by said transmitting device, said transmission signal to said receiving device.

Abstract: A receiver receives binary information from a transmission using a binary amplitude shift keying where information symbols are represented by a signal including a first power state and a second power state. A duration of a bit includes a first part where the second power state is applied irrespective of which binary value is represented, and a second part where a binary value is represented by any of the first power and a third power state or a combination pattern of the first power state and the third power state. A sampling circuit is arranged to retrieve samples of the received signal during the second part and discard samples during the first part. A duration of the retrieving of samples is selected to be a time corresponding to the duration of the second part plus a time based on an expected synchronization error.

Abstract: A technique for radio transmitting data is described. As to a method aspect of the technique data to be transmitted to a receiver is represented by at least two partial modulation symbols. Each of the at least two partial modulation symbols is associated to a different layer of the radio transmission to the receiver. A modulation symbol is generated by combining the at least two partial modulation symbols at different power levels according to the associated layer. The modulation symbol is transmitted to the receiver.

Abstract: A method of a network node is disclosed. The method is for concurrently transmitting two or more wake-up signals (WUS) using an signal generator applying an signal generator symbol rate, wherein each WUS is for reception by a wake-up receiver (WUR) of a respective wireless communication device. The method comprises selecting a respective Manchester coding symbol rate for each of the two or more WUS, wherein all of the selected respective Manchester coding symbol rates are different from each other, and wherein all Manchester codes having the selected respective Manchester coding symbol rates are orthogonal to each other. The method also comprises generating each of the two or more WUS using the signal generator and application of a Manchester code of the selected respective Manchester coding symbol rate, and multiplexing the two or more WUS for transmission in a WUS message.

Abstract: A first radio device receives a first radio transmission from a second radio device. In response to reception of the first radio transmission by the first radio device being unsuccessful, the first radio device sends a second radio transmission to the second radio device. The second radio transmission comprises an indication to the second radio device that reception of the first radio transmission by the first radio device was unsuccessful. The first radio device generates the second radio transmission to be decodable by one or more other radio devices than the second radio device as comprising a positive acknowledgement message, indicating to the second radio device that reception of the first radio transmission by the first radio device was successful, as comprising a clear-to-send message to the second radio device, or as some other legacy message supported by the other radio device(s).

Abstract: A radio receiver includes a local oscillator arrangement and a controller. The local oscillator arrangement is arranged to provide a signal for down-conversion of radio frequency signal to an intermediate frequency or a baseband frequency in the radio receiver, and the local oscillator arrangement is capable of selectably providing multiple frequency generation qualities. The controller is arranged to estimate a tolerable frequency generation quality for the current operation of the radio receiver or determine whether the current operation of the radio receiver is satisfactory in sense of a currently provided frequency generation quality, and based on the estimation or determination adjust frequency generation quality of the local oscillator arrangement by selecting one of the multiple frequency generation qualities. A radio arrangement, a method and a computer program are also disclosed.

Abstract: A method of transmitting a signal in a wireless communication network from a transmitting device to a receiving device, wherein said receiving device comprises an Analog to Digital Converter, ADC, arranged to sample a received signal at a predetermined sampling frequency. The method comprising the steps of generating 20, by said transmitting device, said transmission signal, wherein a bandwidth of said transmission signal is such that aliasing components will be created by said ADC upon sampling said transmission signal, and wherein said transmission signal is generated in such a way that the aliasing components have a same phase as a corresponding sampled low frequency component of said transmission signal thereby contributing constructively to said low frequency component of said transmission signal, and transmitting 40, by said transmitting device, said transmission signal to said receiving device.

Abstract: A transmitter 108 and a method therein for transmitting overlaid and underlaid signals to a narrowband receiver 112 and a wideband receiver 110. The transmitter and the receivers operate in a wireless communications network 100. The transmitter generates a narrowband signal carrying data for the narrowband receiver. The narrowband signal is generated by: mapping user code bits of the data to a first set of binary symbols; generating a second set of binary symbols by precoding the first set of binary symbols; rotating the binary symbols of the second set resulting in rotated constellation symbols; and filtering the rotated constellation symbols. Further, the transmitter generates a wideband signal carrying data for the wideband receiver. Furthermore, the transmitter overlays the generated narrowband signal over the generated wideband signal and transmits, to the narrowband receiver and the wideband receiver, the overlaid narrowband signal and the underlaid wideband signal, respectively.

Abstract: The invention relates to a method for a wireless communication apparatus, and such an apparatus, configured to use a wake-up signal (WUS), transmitted for waking up a main receiver of a wireless communication device responsive to detection of the WUS by a wake-up receiver (WUR) of the wireless communication device. The method comprises controlling a bandwidth associated with the WUS based on a reception condition metric for the WUR. Embodiments may comprise determining the reception condition metric for the WUR by correlating a received signal comprising the WUS with a WUS reference signal to provide an extreme correlation value, and determining the reception condition metric for the WUR based on the extreme correlation value. In some embodiments, controlling the bandwidth associated with the WUS based on the reception condition metric may comprise controlling a WUS bandwidth based on the reception condition metric.

Abstract: A method is disclosed of generating a frequency shift keying (FSK) signal comprised in an orthogonal frequency division multiplexing (OFDM) signal comprising a plurality of sub-carriers. The FSK signal comprises FSK symbols wherein each FSK symbol has a corresponding FSK symbol frequency. The method comprises assigning a set of adjacent sub-carriers to transmission of the FSK signal (wherein the set is a sub-set of the plurality of sub-carriers), and associating each FSK symbol frequency with a corresponding sub-carrier in the set of adjacent sub-carriers. The method also comprises selecting, for each FSK symbol to be transmitted, an FSK symbol phase such that an FSK signal phase at a start of the FSK symbol to be transmitted meets a phase difference criterion in relation to the FSK signal phase at an end of an immediately previous FSK symbol.

Abstract: The disclosure relates to wireless networks, and more specifically to multiple access networks. This present disclosure provides for a method in a wireless device, for predicting Quality of Service of a possible future connection between the wireless device and one or more wireless networks. The predicted Quality of Service may be used e.g. for making a handover decision. The disclosed method comprises detecting an access point of a first wireless network within range of the wireless device. The method further comprises determining the number of devices already being connected to the access point and calculating the predicted Quality of Service based on the determined number of devices already being connected to the access point. The disclosure further relates to a wireless device and to a computer program.

Abstract: Disclosed is a method for an access point of scheduling a plurality of wireless communication devices for transmission. The method comprises selecting (210) a respective modulation and coding scheme—MCS—for each of the plurality of wireless communication devices, where-in each of the respective MCS:s is associated with a respective power back-off, sorting (220) the plurality of wireless communication devices into two or more groups, wherein each group has a maximum size, and scheduling (230) each of the two or more groups of wireless communication devices on different respective transmission resources. The sorting comprises letting first wireless communication devices having the same first respective MCS and the same first respective power back-off belong to the same group.

Abstract: An aspect of the present disclosure is directed to a network node for performing communication in a wireless communication network. The network node is configured to receive a signal transmitted by a user device in the wireless communication network, measure a received power level at which the signal is received by the network node, determine, based on a predefined transmit power level of the network node, based on a predefined transmit power level of the user device and based on the received power level, a threshold power level for a clear channel assessment to be performed by the user device, and trigger transmitting an indication of the threshold power level to the user device. Further aspects of the disclosure pertain to a user device, methods and a computer program product.

Abstract: According to a disclosed example, an intention of a first wireless communication device to use a first power level and a first time-frequency resource for up-link transmission to a first cellular communication network is detected. At a second wireless communication device, a signal is received from the first device indicative of up-link transmission. The second device determines whether or not an interference (caused by the up-link transmission of the first device and affecting a down-link reception of the second device from a second cellular communication network at a second power level in a second time-frequency resource) has a third power level associated with the first power level that exceeds a power level threshold associated with the second power level.

Abstract: In one aspect, a transmitting device may frequency-division multiplex a wake-up signature (WUS) targeted to a wake-up receiver (WUR) of a receiving device with user data targeted to a main transceiver of each of one or more other receiving devices into an output signal. The output signal is then transmitted. A receiving device having a WUR and a main transceiver of the receiving device detects, at the WUR, a WUS targeted for the WUR in a received signal. The WUS is frequency-division multiplexed with user data for one or more other receiving devices in the received signal. The receiving device wakes up the main transceiver in response to the detecting.

Abstract: Determining timing of an OFDM signal comprises performing (610) an auto-correlation with a received signal, using a delay chosen to correspond to the duration of an OFDM symbol excluding the cyclic prefix, with the number of terms used in the summation in the correlation is at least as large as the smallest number of samples in any cyclic prefix of a subframe. Based on the auto-correlation, first and second correlation peaks meeting one or more predetermined detection criteria are detected (620), and evaluated to determine (630) that they are separated in time by an interval corresponding to an OFDM symbol interval. The method further comprises identifying (640), based on the two correlation peaks, one of the correlation peaks as corresponding to an OFDM symbol having a larger cyclic prefix than an adjacent OFDM symbol, and determining (650) a subframe and/or slot timing for the received signal, based on said identifying.

Abstract: A transmitter 108 and a method therein for transmitting overlaid and underlaid signals to a narrowband receiver 112 and a wideband receiver 110. The transmitter and the receivers operate in a wireless communications network 100. The transmitter generates a narrowband signal carrying data for the narrowband receiver. The narrowband signal is generated by: mapping user code bits of the data to a first set of binary symbols; generating a second set of binary symbols by precoding the first set of binary symbols; rotating the binary symbols of the second set resulting in rotated constellation symbols; and filtering the rotated constellation symbols. Further, the transmitter generates a wideband signal carrying data for the wideband receiver. Furthermore, the transmitter overlays the generated narrowband signal over the generated wideband signal and transmits, to the narrowband receiver and the wideband receiver, the overlaid narrowband signal and the underlaid wideband signal, respectively.

Abstract: A first wireless Access Point (AP) node 102 and a method therein for controlling radio resource usage. The first wireless AP node is arranged to have a first Radio Frequency (RF) coverage area 102a that is at least partly overlapping with a second RF coverage area 104a of a second wireless AP node 104. The first and second wireless AP nodes are arranged to operate on the same RF channel. The method comprises configuring a first priority level of the first wireless AP node in relation to a second priority level of the second wireless AP node, which first and second priority levels are priority levels for accessing the RF channel. The method further comprises transmitting, to a wireless device 108 associated with the first wireless AP node, data via the RF channel in dependence of the first priority level. Thereby, the radio resource usage is controlled. According to some embodiments, the priority level is set based on negotiations between the first and second wireless AP nodes.

Abstract: Methods and systems for providing virtual beacons are presented. According to one aspect, a method for providing a virtual beacon at a first location comprises transmitting, by a transmitter at a second location geographically different from the first location, an information signal using a transmit power level, Pj, and including an advertised transmit power level, PA, both selected to be indicative of a distance, d, between a location of a receiver of the information signal and the first location. The signal transmitted from the second location emulates a signal that would have been produced by a beacon located at the first location. The information signals may be aimed at one or more User Equipments (UEs), and/or may be focused on one or more specific target locations rather than on individual UEs.

Abstract: A method of placing a node (10) in a wireless communication network into a standby mode, said node (10) comprising a plurality of antennae (13, 14), a primary radio (11) and a secondary radio (12) wherein said primary radio (11) and said secondary radio (12) share at least two of said plurality of antennae (14), said node (10) further comprising a Radio Frequency, RF, switch (15) arranged to connect said secondary radio (12) to any one of said at least two shared antennae (14), wherein said primary radio (11) is arranged to operate within a first frequency band, and wherein said secondary radio (12) is arranged to operate within a second frequency band, wherein said second frequency band is a sub-band of said first frequency band, said method comprising the steps of receiving (110) a packet; determining (120) for each of said shared antennae (14) separately, a signal quality indicator of said second frequency band corresponding to said received packet; selecting (130) one of said shared antennae (14) based on