Systems and methods for generating and transmitting ranging signals and data signals from transmitters in a wireless positioning system, and also for receiving and processing those signals at a mobile device. Different approaches are used, including separately transmitting the ranging signals and the data signals based on time, frequency, code, phase, or any combination thereof.

A method for reducing cross cell interference in a wireless time division duplex communication system using code division multiple access, the system having at least one user equipment (UE) and a base station (BS) is disclosed. The method begins by measuring an interference level of each timeslot at the BS. A timeslot is eliminated for additional uplink communication if the measured interference level exceeds a first threshold. UEs in nearby cells that are large interferers are identified and their downlink timeslot usage is gathered. A timeslot is eliminated for uplink communication for a large interferer UE that uses the timeslot for downlink communication.

Each of a plurality of modules comprises a respective one of a plurality of antenna elements, and each of a subset of the plurality of modules comprising a respective one of a plurality of transceivers, wherein the plurality of modules are interconnected via one or more communication links. The circuitry may be operable to receive a calibration signal via the plurality of antenna elements, determine, for each one of the antenna elements, a time and/or phase of arrival of the calibration signal, calculate, based on the time and/or phase of arrival of the calibration signal at each of the plurality of antenna elements, electrical distances between the plurality of antenna elements on the one or more communication links, and calculate beamforming coefficients for use with the plurality of antenna elements based on the electrical distances.

A system that incorporates the subject disclosure may include, for example, a method for measuring a power level in at least a portion of a plurality of resource blocks occurring in a radio frequency spectrum, wherein the measuring occurs for a plurality of time cycles to generate a plurality of power level measurements, calculating a baseline power level according to at least a portion of the plurality of power levels, determining a threshold from the baseline power level, and monitoring at least a portion of the plurality of resource blocks for signal interference according to the threshold. Other embodiments are disclosed.

A system that incorporates the subject disclosure may perform, for example, a method for receiving interference information from each of the plurality of communication devices detecting interference information in a plurality of segments of a radio frequency spectrum, correlating the interference information of the plurality of communication devices to generate correlated information, and identifying a plurality of interferers according to the correlated information. Other embodiments are disclosed.

A system that incorporates the subject disclosure may perform, for example, a method for receiving interference information from each of the plurality of communication devices detecting interference information in a plurality of segments of a radio frequency spectrum, correlating the interference information of the plurality of communication devices to generate correlated information, and identifying a plurality of interferers according to the correlated information. Other embodiments are disclosed.

The present disclosure describes the concept of operations and the medium access control protocols of a wireless communication system using code-division multiple access with interference avoidance (CDMA-IA) as its physical layer. The system can dynamically share a common band with other networks without a central radio resource controller. In one embodiment, the wireless communication system includes a plurality of radio nodes forming a wireless mesh network, wherein the pairs of radio nodes use, individually optimized, time division duplexing. At least one radio node includes a software-defined radio, a memory, and an electronic processor. The electronic processor is configured to control the software-defined radio to transmit a pilot signal and share various state information with the other nodes of the network. The shared information includes local spectrum occupancy and node connectivity sets. The pervasive sharing of spectrum occupancy among all nodes enables the usage of the shared band to be maximized.

A system that incorporates the subject disclosure may perform, for example, a method for receiving interference information, identifying a plurality of interferers, approximating a location of the plurality of interferers, and adjusting an antenna pattern of an antenna. The method can include determining traffic loads and adjusting the antenna pattern according to the traffic loads. Other embodiments are disclosed.

A system includes a method for detecting a signal interference in a communication signal of a wireless communication system. An identified source of the signal interference is determined according to an interference profile of a plurality of interference profiles associated with an interference profile library having information that approximates characteristics of the signal interference. The signal interference of the communication signal is mitigated according to an interference parameter associated with the identified source by filtering the communication signal according to the interference parameter.

A system that incorporates the subject disclosure may include, for example, a device comprising a memory to store instructions and a processor coupled to the memory, wherein responsive to executing the instructions, the processor performs operations. The operations comprise receiving signals over a spectrum of frequencies, providing location data of the device to a base station, receiving a request from a base station to perform a spectral analysis of the signals, detecting an interference among the signals, and providing, in response to the request, data to the base station regarding a source of the interference, wherein the data comprises a location of the source relative to the device, spectral data for identifying the source, and a time a frequency of occurrence of the interference. Other embodiments are disclosed.