A method and system for performing Maximum Likelihood Detector (MLD) preprocessing in a Multiple-Input Multiple-Output (MIMO) communication system, the method including, obtaining a received signal Y a corresponding channel matrix H and a vector of noise samples n; calculating a whitening filter L.sup.−H; whitening a channel matrix H; selecting one of a first calculation or a second calculation, based on estimated complexity of the calculations; and performing preprocessing of the received signal using the selected calculation. The first calculation includes: whitening the received signal and performing a Cordic based QR decomposition to the whitened channel matrix {tilde over (H)} and the whitened received signal {tilde over (Y)} to obtain triangular matrix R and Y=Q.sup.HL.sup.−HY. The second calculation includes: performing a Cordic based QR decomposition to the whitened channel matrix {tilde over (H)} and the whitening filter L.sup.−H to obtain triangular matrix R and Q.sup.HL.sup.−H, and multiplying the received signal Y by Q.sup.HL.sup.−H to obtain Y=Q.sup.HL.sup.−HY.

A system includes a base station, an antenna coupled to the base station, and an antenna line device coupled to the antenna. The antenna line device is Internet Protocol (IP) addressable and is configured to receive a control signal from a controller.

Embodiments of the disclosed techniques include methods for remote interference management (RIM) implemented in a network device in charge of management in a wireless network. In one embodiment, a method includes receiving messages from a set of base stations, wherein each message from abase station of the set of base stations indicates that the base station is interfered. The method further includes grouping the set of base stations into a set of reference signal groups based on the messages, each reference signal group being mapped to a reference signal group identifier; and the method continues with sending a respectively mapped reference signal group identifier to each of the set of base stations. Embodiments of the invention also include methods to group base stations causing the interference.

A system (800) for determining frequency spacings to prevent intermodulation distortion signal interference is provided. The system (800) includes a sensor assembly (810) and a meter verification module (820) communicatively coupled to the sensor assembly (810). The meter verification module (820) is configured to determine a frequency of a first signal to be applied to a sensor assembly (810) of a vibratory meter and set a demodulation window about the frequency of the first signal. The meter verification module (800) is also configured to determine a frequency of the second signal to be applied to the sensor assembly such that a frequency of an intermodulation distortion signal generated by the first signal and the second signal is outside the demodulation window.

A test system comprises a device under test and a testing device. The device under test comprises a first initiation unit, wherein the first initiation unit is configured to generate a first wireless initiation signal. The initiation signal consists of at least one of electromagnetic waves and sound waves, wherein the initiation signal comprises a first test command. The testing device comprises a first sensor unit, wherein the first sensor unit is configured to receive the initiation signal via the first sensor unit. The testing device is configured to generate a first electromagnetic test signal based on the first test command.

A test system comprises a device under test and a testing device. The device under test comprises a first initiation unit, wherein the first initiation unit is configured to generate a first wireless initiation signal. The initiation signal consists of at least one of electromagnetic waves and sound waves, wherein the initiation signal comprises a first test command. The testing device comprises a first sensor unit, wherein the first sensor unit is configured to receive the initiation signal via the first sensor unit. The testing device is configured to generate a first electromagnetic test signal based on the first test command.

Systems, methods, and apparatus for geolocating a signal emitting device are disclosed. A monitoring array comprises at least four monitoring units. A distance ratio between the at least four monitoring units relative to a midpoint is determined. The at least four monitoring units are operable to scan independently for a signal of interest. The at least four monitoring units are operable to calculate times of arrival and angles of arrival for the signal of interest. Each of the at least four monitoring units is operable to measure the signal of interest and transmit a formatted message to other monitoring units within the monitoring array. Each of the at least four monitoring units is operable to determine a location of the signal emitting device from which the signal of interest is emitted based on calculations and measurements relating to the signal of interest.

Systems, methods, and apparatus for geolocating a signal emitting device are disclosed. A monitoring array comprises at least four monitoring units. A distance ratio between the at least four monitoring units relative to a midpoint is determined. The at least four monitoring units are operable to scan independently for a signal of interest. The at least four monitoring units are operable to calculate times of arrival and angles of arrival for the signal of interest. Each of the at least four monitoring units is operable to measure the signal of interest and transmit a formatted message to other monitoring units within the monitoring array. Each of the at least four monitoring units is operable to determine a location of the signal emitting device from which the signal of interest is emitted based on calculations and measurements relating to the signal of interest.

An anti-interference control apparatus and method, a terminal device, and a computer-readable storage medium are disclosed. The anti-interference control apparatus may include: an interference detection assembly, connected to a millimeter wave antenna module, and configured for determining, according to a channel quality parameter from the millimeter wave antenna module, whether a millimeter wave signal emitted by the millimeter wave antenna module is interfered; an interference source detection assembly, connected to the interference detection assembly, and configured for detecting location information of an interference source when the interference detection assembly determines that the millimeter wave signal emitted by the millimeter wave antenna module is interfered; and a control assembly, connected to the interference source detection assembly, and configured for performing, according to the location information from the interference source detection assembly, anti-interference processing corresponding to the location information. The terminal device includes the millimeter wave antenna module.

A wireless receiver includes a down converter module operable to deliver a signal having a signal bandwidth that changes over time, a dynamically controllable filter module having a filter bandwidth and fed by said down converter module, and a measurement module operable to at least approximately measure the signal bandwidth, said dynamically controllable filter module responsive to said measurement module to dynamically adjust the filter bandwidth to more nearly match the signal bandwidth as it changes over time, whereby output from said filter module is noise-reduced. Other wireless receivers, electronic circuits, and processes for their operation are disclosed.