A fully functional spectrum analyzer is integrated into an outdoor communications unit of a point-to-point communication system. The spectrum analyzer of the outdoor unit provides for remote spectral diagnostics for network planning and wideband operation and is operable to capture signals outside of the signal bandwidth. With the spectrum analyzer integrated into the outdoor unit, accessing spectral diagnostic information is conducted without having to disrupt the normal operation of the communications network.

Radio frequency (RF) communication systems with coexistence management are provided herein. In certain embodiments, a method of coexistence management in a mobile device includes providing an RF receive signal from a first front end system to a first transceiver, generating an RF transmit signal and an RF observation signal using a second front end system, the RF observation signal generated based on observing the RF transmit signal, generating digital observation data based on the RF observation signal using a second transceiver, downconverting the RF receive signal to generate a baseband receive signal using the first transceiver, and compensating the baseband receive signal for RF signal leakage based on the digital observation data using the first transceiver.

An impulsive noise detection method is applied to an orthogonal frequency-division multiplexing (OFDM) system to detect whether an input signal includes impulsive noise. The impulsive noise detection method includes receiving the input signal, converting the input signal to a digital input signal, filtering out a data band from the digital input signal to generate a signal under detection, calculating the signal under detection to generate a calculation result, and determining whether the input signal includes the impulsive noise according to the calculation result and a threshold.

A method that incorporates aspects of the subject disclosure may include, for example, obtaining, by a system comprising a processor, interference information associated with one or more physical resource blocks (PRBs) from each base station of a plurality of base stations. Further, the method can include determining, by the system, from the interference information a strategy for improving a PRB utilization of a first base station of the plurality of base stations. In addition, the method can include conveying, by the system, the strategy to at least one base station of the plurality of base stations. Other embodiments are disclosed.

Embodiments of the disclosure relate to reducing out-of-channel noise in a wireless distribution system (WDS). A digital filter in a remote unit is configured to suppress out-of-channel noise in a downlink digital communications signal based on at least one filter configuration parameter received from a control circuit. The control circuit is configured to determine the filter configuration parameter based on physical characteristics of the downlink digital communications signal. By suppressing the out-of-channel noise of the downlink digital communications signal, it is possible to provide a downlink RF communications signal communicated from the remote unit that complies with a spectrum emission mask (SEM). Further, by suppressing the out-of-channel noise at the remote unit, it is not necessary for a central unit to perform digital filtering before distributing the downlink digital communications signal to the remote unit, thus helping reduce complexity, cost, physical size, and power consumption of the central unit.

A method that incorporates aspects of the subject disclosure may include, for example, receiving digital data via a plurality of fiber optic cables, wherein the digital data represents a plurality of radio frequency signals received at a plurality of remote radio units via a plurality of uplink paths, wherein the first virtual processing system is configured to mitigate interference detected in one or more of the plurality of uplink paths, performing a plurality of measurements of the digital data to identify an interference condition associated with at least a portion of the plurality of uplink paths associated with the plurality of remote radio units; and providing updated digital data, according to the interference condition that is identified, to a second virtual processing system including at least one second virtual processor, wherein the second virtual processing system is configured to operate as one or more baseband units for providing cellular communication services. Other embodiments are disclosed.

A radio communication apparatus includes a discrete Fourier transformer that performs a frequency-domain transform on each of a plurality of reception signals received at a plurality of receiver chains and generates a plurality of frequency-domain signals, a covariance matrix calculator that calculates covariance of the plurality of frequency-domain signals, a deviation calculator that calculates a cumulative value of covariance in a first frequency range and a second frequency range and calculates deviation of the covariance in the plurality of frequency ranges, and an adjacent-channel interference determiner that determines presence or absence of adjacent-channel interference using the cumulative value of the covariance.

A method for processing a multiple carrier signal provided with subcarriers distributed in a band. The method includes calculating a subcarrier noise of an edge of the band, calculating a subcarrier noise of a center of the band, calculating a ratio of the subcarrier noise of the edge of the band to the subcarrier noise of the center of the band, determining whether the ratio is greater than a threshold, and acknowledging that the edge of the band suffers from interference when the ratio is greater than the threshold.

A system that incorporates aspects of the subject disclosure may perform operations including, for example, obtaining uplink information associated with a plurality of communication devices transmitting wireless signals on a plurality of uplink paths, performing, based on the uplink information, a plurality of measurements of the plurality of uplink paths, identifying a measurement from the plurality of measurements that is below a threshold, and initiating a corrective action to improve a measurement of an affected uplink path of the plurality of uplink paths based on the identifying. Other embodiments are disclosed.

Radio frequency (RF) communication systems with coexistence management are provided herein. In certain embodiments, a method of coexistence management in a mobile device includes providing an RF receive signal from a first front end system to a first transceiver, generating an RF transmit signal and an RF observation signal using a second front end system, the RF observation signal generated based on observing the RF transmit signal, generating digital observation data based on the RF observation signal using a second transceiver, downconverting the RF receive signal to generate a baseband receive signal using the first transceiver, and compensating the baseband receive signal for RF signal leakage based on the digital observation data using the first transceiver.