Abstract: Systems and methods for detecting low-loss eigenmodes of a spherical waveguide bounded by the Earth's surface and its ionosphere are disclosed. One or more eigenmodes of the Earth-ionosphere waveguide may be computed based on a mathematical model incorporating electrical properties of the terrestrial surface and plasma physics of the ionospheric layer. A transmitter apparatus may be used transmit electrical power into the Earth-ionosphere waveguide in the form of an electromagnetic wave, which may, in turn, be detected by a receiver apparatus remote from the transmitter apparatus. A coupling strength between the transmitted electromagnetic wave and the one or more eigenmodes may be determined by measuring power received by the receiver apparatus in the detected electromagnetic wave.

Abstract: A base station according to this disclosure includes a plurality of antennas used for transmission and reception, an adaptive array processing unit that performs adaptive array processing on reception signals received by the plurality of antennas, and a control unit that decides a transmission antenna used for the transmission from the plurality of antennas at a time when a transmission signal is transmitted, and the control unit decides the transmission antenna based on transmission weight vectors respectively corresponding to the plurality of antennas obtained from a processing result of the adaptive array processing unit.

Abstract: An RF module includes a switch IC on a surface of a module substrate and a passive circuit provided in and/or on the module substrate. The switch IC includes a high-frequency circuit on an IC substrate and a digital control circuit. In a plan view of the IC substrate, the digital control circuit is surrounded by the high-frequency circuit. The high-frequency circuit includes analog ground electrodes in a boundary portion with the digital control circuit in the high-frequency circuit to surround the digital control circuit in the plan view.

Abstract: Devices and systems, and methods of using them, for point-to-point transmission/communication of high bandwidth signals. Radio devices and systems may include a pair of reflectors (e.g., parabolic reflectors) that are adjacent to each other and configured so that one of the reflectors is dedicated for sending/transmitting information, and the adjacent reflector is dedicated for receiving information. Both reflectors may be in a fixed configuration relative to each other so that they are aligned to send/receive in parallel. In many variations the two reflectors are formed of a single housing, so that the parallel alignment is fixed, and reflectors cannot lose alignment. The device/systems may be configured to allow switching between duplexing modes. These devices/systems may be configured as wide bandwidth zero intermediate frequency radios including alignment modules for automatic alignment of in-phase and quadrature components of transmitted signals.

Abstract: A mixer module includes a mixer, at least one DC offset circuit, a filter and a controller. The mixer mixes an input signal to generate a first signal. The at least one DC offset circuit generates a second signal based on the first signal. The filter filters out an AC portion of the second signal and generates a third signal according to a DC portion of the second signal. The controller controls the at least one DC offset circuit based on the third signal to reduce a DC portion of the first signal.

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a first signal; listen, after transmitting the first signal and during a listening interval, for a second signal from a user equipment (UE) affected by the first signal, the second signal being indicative of interference at the first UE; receive the second signal during the listening interval; and initiate an interference management procedure based on receipt of the second signal.

Abstract: The representative embodiments discussed in the present disclosure relate to techniques in which a transmitter may operate in an uplink multiple-input, multiple-output (MIMO) mode of operation. More specifically, in some embodiments, the transmitter may concurrently transmit a first and a second signal within the same frequency band via a first and second antenna, respectively. Further, in some embodiments, the transmitter may include circuitry and/or logic to offset nonlinear interference present in the transmitted signals as a result of antenna coupling between the first and second antenna and a nonlinear element (e.g., a power amplifier) within the transmitter.

Abstract: A terminal and a fast charging method to fast charge the terminal, where the method includes sending, by the terminal, instruction information to a charger connected to the terminal in order to instruct the charger to adjust an output voltage and an output current, converting, by the terminal, the output voltage of the charger into 1/K times the output voltage, and converting the output current of the charger into K times the output current such that a charging circuit between two sides of a battery charges the battery with the 1/K times the output voltage and the K times the output current, where K is a conversion coefficient of a conversion circuit with a fixed conversion ratio in the terminal and is a constant value, and K is any real number greater than one.

Abstract: There is provided a management server including a holding unit for holding a location/frequency list in which location information and frequency information are associated, a list creation unit for creating an available frequency list by extracting, from the location/frequency list, frequency information corresponding to location information received from a base station, and a list transmission unit for transmitting the available frequency list created by the list creation unit to the base station.

Abstract: A noise generator for generating a noise signal over a frequency spectrum has a first noise source and a first digital filter for a first frequency band, a second noise source and a second digital filter for a second frequency band, and an interpolator and a combiner. The first digital filter has a first sample rate and the second digital filter has a second sample rate, wherein the ratio between the second sample rate and the first sample rate, with regard to a sign, corresponds to a ratio between center frequencies of the second frequency band and the first frequency band, wherein an edge of the second digital filters which determines a lower frequency band limit is steeper than an edge of the first digital filter which determines an upper frequency band limit.

Abstract: Apparatus and methods for phase synchronization of phase-locked loops (PLLs) are provided. In certain configurations, an RF communication system includes a PLL that generates one or more output clock signals and a phase synchronization circuit that synchronizes a phase of the PLL. The phase synchronization circuit includes a sampling circuit that generates samples by sampling the one or more output clock signals based on timing of a reference clock signal. Additionally, the phase synchronization circuit includes a phase difference calculation circuit that generates a phase difference signal based on the samples and a tracking digital phase signal representing the phase of the PLL. The phase synchronization circuit further includes a phase adjustment control circuit that provides a phase adjustment to the PLL based on the phase difference signal so as to synchronize the PLL.

Abstract: A receiver device includes an I-Q mixer circuit configured to provide an I-phase signal and a Q-phase signal. The receiver device also includes a first analog-to-digital converter (ADC) circuit configured to digitize the I-phase signal. The receiver device also includes a second ADC circuit configured to digitize the Q-phase signal. The receiver device also includes a 25% duty cycle clock generator configured to provide 25% duty cycle clock signals to the I-Q mixer. The 25% duty cycle clock generator includes a divider circuit with an inverter ring arrangement.

Abstract: The present disclosure relates to digital up-conversion for a multi-band Multi-Order Power Amplifier (MOPA) that enables precise and accurate control of gain, phase, and delay of multi-band split signals input to the multi-band MOPA. In general, a multi-band MOPA is configured to amplify a multi-band signal that is split across a number, N, of inputs of the multi-band MOPA as a number, N, of multi-band split signals, where N is an order of the multi-band MOPA and is greater than or equal to 2. A digital upconversion system for the multi-band MOPA is configured to independently control a gain, phase, and delay for each of a number, M, of frequency bands of the multi-band signal for each of at least N?1, and preferably all, of the multi-band split signals.

Abstract: A system for interference mitigation includes: a first transmit coupler; a receive-band noise cancellation system; a first transmit-band filter; a second transmit coupler; a first receive coupler; a transmit-band noise cancellation system; a first receive-band filter; and a second receive coupler.

Abstract: In one implementation, a wireless communication terminal includes a sense antenna module configured to sample an interference signal. The wireless communication terminal also includes a primary antenna module configured to receive a desired signal. The sense antenna module has a first polarization type, and the primary antenna module has a second polarization type, substantially orthogonal to the first polarization type of the sense antenna module. In addition, the wireless communication terminal includes at least one signal combiner configured to receive output from the sense antenna module and output from the primary antenna module. The at least one signal combiner is configured to mitigate interference with the desired signal by shifting the phase of the output from the sense antenna module by substantially 180 degrees and combining the phase-shifted output from the sense antenna module with the output of the primary antenna module to produce an interference mitigated signal.

Abstract: Methods and apparatus for transmitting Ethernet data along an Ethernet link with a BASE-T transceiver are disclosed. One exemplary BASE-T Ethernet transceiver includes an Ethernet data framing module having an input interface to receive Ethernet block data bits at a first data rate. Logic associates the Ethernet block data bits with an auxiliary bit and a number of zero bits. An error encoder is coupled to the logic to encode all of the data bits, auxiliary bit and zero bits into an error encoded transport frame having plural error check bits. A symbol mapper receives the error encoded transport frame and transforms the error encoded transport frame into multiple symbols. A transmitter coupled to the symbol mapper transmits the multiple symbols over an Ethernet link at one of a selection of symbol rates. The data rate of data transmitted over the Ethernet link is based on the number of zero bits.

Abstract: A passive intermodulation detection system is provided to remotely identify passive intermodulation at a base station site and diagnose the type of intermodulation and location of the non-linearity that is the source of the passive intermodulation. A passive intermodulation cancelation system can generate an equivalent signal to a received interference signal and use the equivalent signal to generate an error signal. The error signal can then be used to reinforce a learning system and converge on a steady state of the interference signal to cancel other interference signals.

Abstract: To enable to favorably send a compressed digital audio signal at a high data rate. First, second, and third metadata are added to a compressed digital audio signal of a predetermined number of channels. The first metadata is metadata indicating a sending frequency of the compressed digital audio signal. The second metadata is metadata indicating a sampling frequency used for converting an uncompressed digital audio signal of each channel into an analog signal. The third metadata is metadata indicating a ratio of the sending frequency to the sampling frequency. The compressed digital audio signal provided with each type of the metadata is transmitted to an external device through a predetermined sending path.

Abstract: Embodiments of an access point (AP), station (STA) and method for channel access are generally described herein. The AP may contend for access to a channel. The contention may be performed in accordance with an omni-directional enhanced distributed channel access function (EDCAF) for transmission within an omni-directional pattern. The contention may be further performed in accordance with a directional EDCAF for transmission to a station (STA) in a directional pattern. The AP may determine whether to transmit within the omni-directional pattern based at least partly on an omni-directional backoff parameter. The AP may further determine whether to transmit in the directional pattern based at least partly on a directional backoff parameter.

Abstract: A device for processing an audio signal arising from a radiofrequency signal, including: an instantaneous multipath sensor able to analyze the radiofrequency signal so as to determine an instantaneous multipath rate, an instantaneous filter block able to attenuate the audio signal in line with an instantaneous attenuation that is an increasing function of the instantaneous multipath rate, also including a mean multipath sensor able to determine a mean multipath rate, and a mean filter block able to attenuate the audio signal in line with a mean attenuation that is an increasing function of the mean multipath rate. A radio receiver having such a processing device is also disclosed.

Abstract: Methods and apparatus for facilitating wireless communication using digital Quadrature Amplitude Modulation are disclosed. A mapping module electronic component of a wireless communication device utilizes a signal constellation for quadrature modulating a signal for transmission or quadrature demodulating a received signal. The signal constellation includes multiple constellation symbols and associated bit sequences. Specific signal constellations are disclosed. The signal constellations may be obtained through an optimization procedure which accounts for both phase noise and power amplifier nonlinearity.

Abstract: Disclosed systems and methods relate to an adaptive harmonic cancellation circuit for communication. The adaptive harmonic cancellation circuit includes a harmonic generator circuit configured to generate a reference harmonic of an interference signal. The adaptive harmonic cancellation circuit includes a harmonic prediction circuit coupled to the harmonic generator circuit. The harmonic prediction circuit is configured to receive an input signal including a target signal at a frequency and a radiated harmonic of the interference signal. The harmonic prediction circuit is configured to generate a predicted harmonic of the interference signal by modifying the reference harmonic of the interference signal to match the radiated harmonic of the interference signal in the input signal. The adaptive harmonic cancellation circuit includes a cancellation circuit coupled to the harmonic prediction circuit.

Abstract: In a sine-wave multiplier, signal components included in an output signal Qu1 and corresponding to the product of a third-order harmonic component of a first square wave W1 and an input signal Vi and the product of a fifth-order harmonic component of the first square wave W1 and the input signal Vi are offset by a signal component included in an output signal Qu2 and corresponding to the product of a fundamental component of a second square wave W2 and the input signal Vi and a signal component included in an output signal Qu3 and corresponding to the product of a fundamental component of a second square wave W3 and the input signal Vi.

Abstract: A portable information handling system display integrates a MIMO antenna configuration that cooperates with a radio to adapt display operations for supporting wireless communication. For example, plural antenna nanowires integrated with display pixel control wires selectively interface with a MIMO radio with the antenna wires selected based upon display operational characteristics, such as the presentation of visual information at the display and the enablement or disablement of touch detection circuits.

Abstract: According to one embodiment, a wireless communication device includes: a wireless communicator configured to transmit and receive a signal; and controlling circuitry configured to detect a first wireless communication device through the wireless communicator. The wireless communicator is configured to transmit a control signal preset between the wireless communication device and the first wireless communication device to activate the first wireless communication device when the controlling circuitry has not detected the first wireless communication device.

Abstract: Disclosed is a sequence generation method for: generating a basic sequence structure comprising C52, which is composed of 52 tones, and D12, which is composed of 12 tones; selecting any one among a plurality of phase rotation factors, which are determined in advance for a bandwidth and applied to the basic sequence structure by unit of C52 or C52D12; and generating a sequence inserted into a preamble to be transmitted to a terminal.

Abstract: In one embodiment, a noise cancellation circuit includes: a window generator to generate a window having a first set of samples; a band splitter to split the window into pairs of symmetric frequency components; a processing circuit, for each of the pairs, to: compare a first magnitude of a first symmetric frequency component to a second magnitude of a second symmetric frequency component and modify one of the components based at least in part on the comparison; an integrator to integrate the pairs output from the processing circuit; and a second window generator to generate a second window having a second set of samples.

Abstract: A method and an apparatus for cancelling interference in a wireless communication system are provided. The method includes acquiring interference signal information on a reception signal received from a base station based on a preconfigured constellation set, and cancelling an interference signal from the reception signal by using the acquired interference signal information. Accordingly, reception performance in a cell edge can be improved by acquiring dominant interference signal information.

Abstract: Devices, systems and methods for analog automatic gain control (AGC) based on estimated distributions of signal characteristics are described. One example method includes generating a digital measurement of a first signal characteristic based on a second signal characteristic of an input signal received by the device, where the second signal characteristic is based on a level of the input signal. The digital measurement of the signal characteristic is used to update a statistical model for the input signal and the posterior probability distribution of the second signal characteristic conditioned on previous digital measurements of the first signal characteristic. The updated posterior probability distribution is used to generate a gain estimate, which is then used to adjust the power level of the input signal. Another example method may use multiple statistical models for each waveform supported by the system.

Abstract: A noise reduction device according to an aspect of an embodiment includes a detection unit, a calculation unit, and a reduction unit. The detection unit detects frequency components of a plurality of noise signals that are included in a received signal, based on a frequency spectrum of the received signal. The calculation unit calculates a coefficient, based on the frequency components that are detected by the detection unit. The reduction unit reduces n noise signals that are at least a part of the plurality of noise signals from the received signal, depending on the coefficient that is calculated by the calculation unit (where n is a positive number that is greater than or equal to 2).

Abstract: An frequency down-converter includes a mixer configured to receive a RF (radio frequency) signal having a first end and a second end and output an intermediate signal comprising a first end and a second end in accordance with a LO (local oscillator) signal having a first end and a second end, wherein the first end and the second end of the LO signal jointly form a two-phase periodic signal of a fundamental frequency approximately equal to a mean frequency of a desired component of the RF signal.

Abstract: A system to detect spoofing attacks is provided. The system includes a satellite-motion-and-receiver-clock-correction module, a compute-predicted-range-and-delta-range module, a subtractor, and delta-range-difference-detection logic. The satellite-motion-and-receiver-clock-correction module periodically inputs, from a global navigation satellite system (GNSS) receiver, a carrier phase range for a plurality of satellites. The satellite-motion-and-receiver-clock-correction module outputs a corrected-delta-carrier-phase range for a current epoch to a first input of a subtractor. The compute-predicted-range-and-delta-range module outputs a predicted delta range to a second input of the subtractor. The predicted delta range is based on inertial measurements observed for the current epoch. The subtractor outputs a difference between the corrected-delta-carrier-phase range and the predicted delta range for the current epoch to delta-range-difference-detection logic.

Abstract: An improved switchable capacitor array comprises a plurality of n?2 capacitor units, each comprising a capacitor with a capacitance and a switch unit. The capacitor units are electrically connected in series. Equidistantly spaced impedance values can be obtained if the values of the capacitances are chosen properly.

Abstract: An interference signal cancellation apparatus, includes a first power divider configured to divide a cancellation reference signal link corresponding to a transmit antenna into a first reference link and a second reference link. The apparatus includes a second power divider configured to divide a signal receiving link connected to a receive antenna into a first receiving link and a second receiving link, and use the first receiving link as an output link. The apparatus includes a primary cancellation unit that is located at the first reference link and that is connected to the signal receiving link by using a coupler. The apparatus includes a secondary cancellation unit that is located at the second reference link and that is connected to the second receiving link by using a coupler. The apparatus includes a control module connected to the second receiving link, the primary cancellation unit, and the secondary cancellation unit.

Abstract: A method for reporting channel state information by a UE having an interference removal ability in a wireless communication system according to an embodiment of the present invention may comprise the steps of: receiving, from a serving cell, information for removal of interference by an adjacent cell; removing the interference or calculating the channel state information and transmitting the calculated channel state to the serving cell, wherein the information for removal of interference may comprise information indicating whether interference by a transmission signal of the adjacent cell exists in a CSI-interference measurement (IM) resource of the serving cell.

Abstract: The present invention proposes a demodulator device, a receiver and a demodulation method for M-ary amplitude shift keying systems (MASK) that requires partial knowledge of the CSI, namely, the channel attenuation coefficient. Therefore, the new demodulator, receiver and demodulation method do not require the knowledge of the channel phase shift. Consequently, no complicated channel estimation techniques are required, and the system will be very robust to the system impairments such as phase noise, I-Q imbalance, etc. In this sense, the new technique is denoted as semi-coherent demodulation (SCD). To reduce the complexity of the new SCD, a suboptimal demodulator is derived which has much lower complexity than the optimal while providing almost the same error probability.

Abstract: A method and an apparatus for cancelling interference in a wireless communication system are provided. The method includes acquiring interference signal information on a reception signal received from a base station based on a preconfigured constellation set, and cancelling an interference signal from the reception signal by using the acquired interference signal information. Accordingly, reception performance in a cell edge can be improved by acquiring dominant interference signal information.

Abstract: Techniques for channel selection in a shared communication medium are disclosed. A communication apparatus may include one or more transceivers, a processor, and memory coupled to the processor and configured to store data and/or instructions. The one or more transceivers may be configured to monitor signaling on a plurality of available channels associated with a communication medium. The processor may be configured to determine an interference level for each of the plurality of available channels based on the monitored signaling, determine that the interference level for each of the plurality of available channels is greater than a first threshold, determine whether a triggering condition is met, and select the first channel of the plurality of channels as an operating channel for a primary radio access technology based on the triggering condition being met, the first channel having an interference level that is greater than a second threshold.

Abstract: An apparatus comprises: radio frequency (RF) transceiver circuitry for electrical coupling to an antenna and including: a local oscillator (LO) circuit configured to generate a LO signal, and a mixer circuit configured to mix a CW tone signal with the LO signal; a measurement receiver path configured to measure an antenna signal, wherein the antenna signal includes the CW tone signal mixed with the LO signal; and baseband processing circuitry electrically coupled to the measurement receiver path and configured to adjust a clock duty ratio of the LO signal to reduce one or more counter intermodulation (CIM) signals in the antenna signal.

Abstract: There is provided systems and methods for mitigating foreign interference by complementing a receiver of a wireless network, comprising: using antennas for reception of desired signals and interference signals; determining the presence of an interference signal originating from at least one foreign transmitting source in the received signals, and for determining a termination of the interference signal; determining the presence of a desired signal originating from the wireless communication network in the received signals; calculating a suitable combination of the received signals, wherein the effect induced by the interference signal is reduced and the impact of an interference cancellation on the desired signals is reduced; and providing the suitable combination to a receiver of a wireless communication network; wherein the method is performed complementary to the receiver of the wireless network and the antennas.

Abstract: Operational and environmental efficiency in virtual radio access networks (VRANs) can be improved by offloading data traffic and/or control signaling between physical transmit points (TPs) of a virtual TP. This may allow one or more physical TPs of the virtual TP to be muted in the downlink or uplink direction, thereby reducing energy consumption. The offloading may be performed during relatively short time-intervals such that physical TP are muted for one or more transmission time intervals (TTIs) before being re-activated. The offloading may also be implemented over longer time-intervals in accordance with a traffic engineering (TE) policy. Further it is possible to re-activate a de-activated downlink transmitter of physical TP by monitoring wireless signals via an activated receiver of the physical TP.

Abstract: A method includes identifying interference mitigation capabilities of a first communication unit in a first cell of a cellular communication network. Transmissions of a second communication unit in a second cell of the cellular communication network are scheduled based on the identified interference mitigation capabilities of the first communication unit in the first cell.

Abstract: Operational and environmental efficiency in virtual radio access networks (VRANs) can be improved by offloading data traffic and/or control signaling between physical transmit points (TPs) of a virtual TP. This may allow one or more physical TPs of the virtual TP to be muted in the downlink or uplink direction, thereby reducing energy consumption. The offloading may be performed during relatively short time-intervals such that physical TP are muted for one or more transmission time intervals (TTIs) before being re-activated. The offloading may also be implemented over longer time-intervals in accordance with a traffic engineering (TE) policy. Further it is possible to re-activate a de-activated downlink transmitter of physical TP by monitoring wireless signals via an activated receiver of the physical TP.

Abstract: Methods and apparatus to mitigate radio frequency interference generated by hardware circuitry and received by wireless circuitry of a wireless communication device are described. A processor obtains a set of wireless performance metrics for signals received by the wireless circuitry. The processor determines a preferred operating mode for the hardware circuitry based on the set of wireless performance metrics and provides an indication of the preferred operating mode to the hardware circuitry. The hardware circuitry is configured for operation in accordance with the preferred operating mode. The processor and/or a second processor provide an indication to the wireless circuitry when the hardware circuitry initiates and terminates an operation that can cause radio frequency interference into the wireless circuitry. The wireless circuitry is configured during a time period that the hardware circuitry is operational to mitigate effects of radio frequency interference generated by the hardware circuitry.

Abstract: The present invention discloses a self-interference signal cancellation device. The device includes a first self-interference cancellation unit, configured to: obtain a first analog signal by coupling a transmit signal output by an analog transmit processing module; perform analog-to-digital conversion on the first analog signal, to obtain a first digital signal; perform interference reconstruction according to the first digital signal, to obtain a first digital interference cancellation signal; and cancel, according to the first digital interference cancellation signal, a self-interference signal included in a digital signal output by a first analog-to-digital conversion module, to obtain a first output signal, and output the first output signal to a digital receive processing module.

Abstract: The disclosure relates to an alternating current (AC) coupling circuit including first and second capacitors having first and second input terminals configured to receive an input differential signal and generate an output differential signal at first and second output terminals of the first and second capacitors. The AC coupling circuit further includes a baseline wander correction circuit configured to make the output differential signal resistant to baseline wander due to the input differential signal including one or more time intervals of unbalanced data. The baseline wander correction circuit includes a differential difference amplifier (DDA) having a first differential input configured to receive the input differential signal, a differential output configured to generate a compensation differential signal, and a second differential input configured to receive the compensation differential signal.

Abstract: Methods and apparatus for facilitating wireless communication using digital Quadrature Amplitude Modulation are disclosed. A mapping module electronic component of a wireless communication device utilizes a signal constellation for quadrature modulating a signal for transmission or quadrature demodulating a received signal. The signal constellation includes multiple constellation symbols and associated bit sequences. Specific signal constellations are disclosed. The signal constellations may be obtained through an optimization procedure which accounts for both phase noise and power amplifier nonlinearity.

Abstract: Disclosed herein are methods and systems for identifying and reducing LTE-system coverage holes due to external interference. One embodiment takes the form of a process that includes receiving a signal in a first wireless band. The received signal comprises a signal of interest. The process also includes determining that a received signal quality of the signal of interest is less than a signal-quality threshold. The process also includes determining that the received signal quality of the signal of interest is less than the signal-quality threshold due to interference external to the first wireless band, and responsively attenuating the received signal. The process also includes demodulating the attenuated received signal to obtain the signal of interest.

Abstract: A zeroing method and zeroing device for an optical time-domain reflectometer (OTDR) are disclosed. The zeroing method includes: before starting the optical time-domain reflectometer, when a laser device is in an off state, sending a zeroing signal; and performing zeroing processing according to the zeroing signal. In the embodiments of the present invention, the feedback zeroing can be performed on a receiving circuit by utilizing the idle time prior to a test or during the test, thus the influence of an offset voltage is reduced, and a problem of operational-amplifier zero drift also can be solved in the meantime, which improves a detectability of the OTDR, and overcomes a disadvantage that a manual zeroing method is not intelligent and a measured waveform introduced in an automatic zeroing method is bad.

Abstract: Methods and systems for facilitating uplink power control (PC) and scheduling in a wireless network are provided. In one example, common interference patterns are obtained from long term channel statistics, and used to perform local PC and scheduling by distributed base stations (eNBs). In some implementations, the common interference patterns are obtained through statistical narrowing techniques that identify common ones out of a plurality of potential interference patterns. The common interference patterns may specify maximum interference thresholds and/or individual eNB-to-eNB interference thresholds which may govern the local PC and scheduling decisions of the distributed eNBs.