Abstract: A method comprises selecting a beam to be scheduled for a slot that is upcoming, and selecting a terminal device to be scheduled in the selected beam. Selection of the terminal device is based on the terminal device considering the selected beam as its best beam. Physical resource blocks are allocated to the terminal device, and a beam configuration to be used for the selected beam is chosen based in part on user traffic and load distribution. A switching event is triggered. The switching event comprises producing the chosen beam configuration by providing a beamforming command and using a control line controlling a switch network comprised in phase shifters to steer the beam. The phase shifters are comprised in a radio frequency front-end unit comprising a plurality of antenna columns. The phase shifters are placed in front of selected antenna sub-arrays comprised in the plurality of antenna columns.

Abstract: A method comprises selecting a beam to be scheduled for a slot that is upcoming, and selecting a terminal device to be scheduled in the selected beam. Selection of the terminal device is based on the terminal device considering the selected beam as its best beam. Physical resource blocks are allocated to the terminal device, and a beam configuration to be used for the selected beam is chosen based in part on user traffic and load distribution. A switching event is triggered. The switching event comprises producing the chosen beam configuration by providing a beamforming command and using a control line controlling a switch network comprised in phase shifters to steer the beam. The phase shifters are comprised in a radio frequency front-end unit comprising a plurality of antenna columns. The phase shifters are placed in front of selected antenna sub-arrays comprised in the plurality of antenna columns.

Abstract: An apparatus, method and computer program is described above: determining a coupling gain for a user device within a cell of a mobile communication system; comparing the determined coupling gain with a coupling gain threshold; setting the user device to operate in a device-specific CSI-RS mode of operation in the event that the determined coupling gain is less than the coupling gain threshold, wherein, in the device-specific CSI-RS mode of operation, the user device is configured to use device-specific reference signal transmissions for the determination of channel state information; and setting the user device to operate in a cell-specific CSI-RS mode of operation in the event that the determined coupling gain is not less than the coupling gain threshold, wherein, in the cell-specific CSI-RS mode of operation, the user device is configured to use cell-specific reference signal transmissions for the determination of channel state information.

Abstract: Embodiments of the present disclosure relate to compressed channel state information transfer. According to embodiments of the present disclosure, the radio unit at the base station receives signals from the terminal device. The radio unit (RU) compresses the signal based on the weights of beams and transmits the compressed signal to the baseband unit (BBU) at the base station. The baseband unit reconstructs the channel based on the compressed signal and the coefficients. In this way, the amount of information conveyed across the RU-BBU interface is reduced, and the accuracy of channel estimation is improved. Further, the sounding reference signal (SRS) channel can be obtained at the BBU with reduced number of SRS transmissions.

Abstract: A method to detect a packet includes: receiving an input sequence including preambles; detecting a transition from a noise period to a signal period in the input sequence; dynamically adjusting a gain of the input sequence in response to the signal period being initiated; and distinguishing an intended packet from other packets, among packets received in the preambles.

Abstract: A method to detect a packet includes: receiving an input sequence including preambles; detecting a transition from a noise period to a signal period in the input sequence; dynamically adjusting a gain of the input sequence in response to the signal period being initiated; and distinguishing an intended packet from other packets, among packets received in the preambles.

Abstract: A method to detect a packet includes: receiving an input sequence including preambles; detecting a transition from a noise period to a signal period in the input sequence; dynamically adjusting a gain of the input sequence in response to the signal period being initiated; and distinguishing an intended packet from other packets, among packets received in the preambles.

Abstract: A method and device for transmitting a preamble sequence is disclosed. A transmitter according to an embodiment may extract a first sequence for a non-coherent receiver and a second sequence for a coherent receiver, from ternary preamble sequences including elements ?1, 0 and 1, and map the first sequence and the second sequence to a preamble including a plurality of bits to generate a third sequence that the non-coherent receiver and coherent receiver support.

Abstract: Disclosed is a method and apparatus to detect an intended packet by a sliding intermediate frequency (SIF) coherent ultra low power (ULP) wireless receiver. The method includes detecting a transition from a noise period to a signal period in a pair of input sequences received, dynamically adjusting a gain of the pair of input sequences in response to the signal period being initiated, distinguishing an intended packet from packets received in preambles included in the pair of input sequences, and compensating for a carrier frequency offset of the intended packet in the signal period.

Abstract: A method to compensate a carrier frequency offset (CFO) in a receiver is disclosed. The method includes receiving discrete time samples, obtaining a sample vector from the received discrete time samples, obtaining tentative CFO estimates based on the sample vector, selecting a CFO having a greatest compensation coefficient from the tentative CFO estimates, and compensating the CFO in the received discrete time samples.

Abstract: A method to compensate a carrier frequency offset (CFO) in a receiver is disclosed. The method includes receiving discrete time samples, obtaining a sample vector from the received discrete time samples, obtaining tentative CFO estimates based on the sample vector, selecting a CFO having a greatest compensation coefficient from the tentative CFO estimates, and compensating the CFO in the received discrete time samples.

Abstract: Examples provide a method of performing automatic gain control (AGC) in a wireless receiver, the method including computing, by an energy detection (ED) circuit, a variance in an output signal of an analog-to-digital converter (ADC), and activating, by the ED circuit, an AGC circuit to adjust a gain of at least one component in a radio frequency integrated chip (RFIC) in response to the variance exceeding a threshold. Examples also provide for a wireless receiver that implements such a method.

Abstract: Provided is a method of estimating a Direct Current (DC) offset in an Ultra-Low Power (ULP) receiver. The method includes receiving a signal from an output of an Analog to Digital Converter (ADC) in the ULP receiver. The signal includes a correlated variable DC component for at least one of an in-phase arm and a quadrature arm of the ULP receiver. The method also includes estimating a DC offset compensation parameter in a plurality of phases for a plurality of stages based on the received signal such that the estimating includes calculating the DC offset compensation parameter in a magnitude estimation phase for the plurality of stages and calculating the DC offset compensation parameter in a sign estimation phase for the plurality of stages.

Abstract: Disclosed is a method and apparatus to detect an intended packet by a sliding intermediate frequency (SIF) coherent ultra low power (ULP) wireless receiver. The method includes detecting a transition from a noise period to a signal period in a pair of input sequences received, dynamically adjusting a gain of the pair of input sequences in response to the signal period being initiated, distinguishing an intended packet from packets received in preambles included in the pair of input sequences, and compensating for a carrier frequency offset of the intended packet in the signal period.

Abstract: A method to detect a packet includes: receiving an input sequence including preambles; detecting a transition from a noise period to a signal period in the input sequence; dynamically adjusting a gain of the input sequence in response to the signal period being initiated; and distinguishing an intended packet from other packets, among packets received in the preambles.

Abstract: A method of performing synchronization in a super regenerative receiver (SRR) includes setting a quench rate of the SRR to a value of 1.5 times a chip rate of an incoming signal, acquiring an expected preamble sequence of an arbitrary sample set among a plurality of possible sample sets, acquiring an expected start frame delimiter (SFD) sequence for all of the possible sample sets to achieve frame synchronization, computing respective correlation metrics for bits of the expected SFD sequence while the expected SFD sequence is acquired for all of the possible sample sets, calculating a decision metric based on the correlation metrics in response to an SFD sequence being detected for one or more of the possible sample sets, and identifying a best sample set for demodulating the incoming signal among all of the possible sample sets based on the decision metric to achieve pulse synchronization.

Abstract: A method of performing synchronization in a super regenerative receiver (SRR) includes setting a quench rate of the SRR to a value of 1.5 times a chip rate of an incoming signal, acquiring an expected preamble sequence of an arbitrary sample set among a plurality of possible sample sets, acquiring an expected start frame delimiter (SFD) sequence for all of the possible sample sets to achieve frame synchronization, computing respective correlation metrics for bits of the expected SFD sequence while the expected SFD sequence is acquired for all of the possible sample sets, calculating a decision metric based on the correlation metrics in response to an SFD sequence being detected for one or more of the possible sample sets, and identifying a best sample set for demodulating the incoming signal among all of the possible sample sets based on the decision metric to achieve pulse synchronization.

Abstract: A method of per-tone spreading in single carrier block transmissions, includes generating a block of modulated symbols, and performing the per-tone spreading on the block of the modulated symbols. Also, a transmitter configured to perform per-tone spreading in single carrier block transmissions, includes a modulator configured to generate a block of modulated symbols, and a spreader configured to perform the per-tone spreading on the block of the modulated symbols.

Abstract: A method and device for transmitting a preamble sequence is disclosed. A transmitter according to an embodiment may extract a first sequence for a non-coherent receiver and a second sequence for a coherent receiver, from ternary preamble sequences including elements ?1, 0 and 1, and map the first sequence and the second sequence to a preamble including a plurality of bits to generate a third sequence that the non-coherent receiver and coherent receiver support.

Abstract: Examples provide a method of performing automatic gain control (AGC) in a wireless receiver, the method including computing, by an energy detection (ED) circuit, a variance in an output signal of an analog-to-digital converter (ADC), and activating, by the ED circuit, an AGC circuit to adjust a gain of at least one component in a radio frequency integrated chip (RFIC) in response to the variance exceeding a threshold. Examples also provide for a wireless receiver that implements such a method.