Disclosed is a GPS arrival angle selecting system. The system includes: a arrival angle estimating unit connected to a receiving antenna of a GPS receiver including at least one antenna array element and configured to decide a first arrival angle of a signal received prior to despreading and a second arrival angle of a signal received after despreading; and an arrival angle selecting unit configured to select a different peak value by comparing the first arrival angle and the second arrival angle. Also disclosed is a GPS arrival angle selecting method.

Systems and methods for determining user equipment (UE) locations within a wireless network using reference signals of the wireless network are described. The disclosed systems and methods utilize a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with two or more antennas of the wireless system. Based on received reference signal parameters the reference signal within the signals from each receive channel among the receive channels is identified. Based on the identified reference signal from each receive channel, an angle of arrival between a baseline of the two or more antennas and incident energy from the UE to the two or more antennas is determined. That angle of arrival is then used to calculate the location of the UE. The angle of arrival may be a horizontal angle of arrival and/or a vertical angle of arrival

Systems and methods for determining user equipment (UE) locations within a wireless network using reference signals of the wireless network are described. The disclosed systems and methods utilize a plurality of in-phase and quadrature (I/Q) samples generated from signals provided by receive channels associated with two or more antennas of the wireless system. Based on received reference signal parameters the reference signal within the signals from each receive channel among the receive channels is identified. Based on the identified reference signal from each receive channel, an angle of arrival between a baseline of the two or more antennas and incident energy from the UE to the two or more antennas is determined. That angle of arrival is then used to calculate the location of the UE. The angle of arrival may be a horizontal angle of arrival and/or a vertical angle of arrival

This method for the non-linear estimation of no more than two mixed signals from separate sources, the time/frequency representation of which shows an unknown non-zero proportion of zero components, using an array made up of P>2 antennas, when the directional vectors U and V of the sources emitting these signals are additionally known or estimated, includes the following steps: a) Calculating the successive discrete Fourier transforms of the signal received by the antennas and sampled to obtain a time-frequency P-vector grid of the signal; each element of the grid being referred to as a box and containing a complex vector X forming a measurement; b) For each box, calculating the conditional expectation estimator of the signal, or of the signals, from the measurement X and an a priori probability density for the signals that is a Gaussian mixture.

A method of determining incident angles of Radio Frequency, RF, signals received by an antenna array comprising a plurality of antennae is described. The method comprises generating a plurality of direction finding, DF, signals based on antenna signals received from the antenna array, wherein each DF signal corresponds to a respective antenna array element and each antenna array element corresponds to one or more antennae. A plurality of DF spectra are then generated, each DF spectrum corresponding to a respective DF signal and comprising measured values of signal power at two or more given respective frequencies. An incident signal angle is calculated for each given frequency, based on the measured values of power at the frequency, the configuration of the antennae in the antenna array and antenna gain patterns corresponding to the antenna array elements.

A method of determining incident angles of Radio Frequency, RF, signals received by an antenna array comprising a plurality of antennae is described. The method comprises generating a plurality of direction finding, DF, signals based on antenna signals received from the antenna array, wherein each DF signal corresponds to a respective antenna array element and each antenna array element corresponds to one or more antennae. A plurality of DF spectra are then generated, each DF spectrum corresponding to a respective DF signal and comprising measured values of signal power at two or more given respective frequencies. An incident signal angle is calculated for each given frequency, based on the measured values of power at the frequency, the configuration of the antennae in the antenna array and antenna gain patterns corresponding to the antenna array elements.

A method for estimating an angle of arrival of multiple targets moving at a high speed includes defining a range and a resolving power of an angle of arrival and an angular velocity of a plurality of direction finding targets (S1100), setting minimum values of the angle of arrival and the angular velocity within the range to be a set angle of arrival and a set angular velocity (S1200), and adding angle of arrival resolution and angular velocity resolution to the set angle of arrival and the set angular velocity, respectively, deriving a two-dimensional spatial spectrum of a transformed incident signal using a pre-steered vector until the angle of arrival and the angular velocity become a maximum value, and estimating a peak value of the spatial spectrum as a measured angle of arrival and a measured angular velocity of the target (S1300).

A method for estimating an angle of arrival of multiple targets moving at a high speed includes defining a range and a resolving power of an angle of arrival and an angular velocity of a plurality of direction finding targets (S1100), setting minimum values of the angle of arrival and the angular velocity within the range to be a set angle of arrival and a set angular velocity (S1200), and adding angle of arrival resolution and angular velocity resolution to the set angle of arrival and the set angular velocity, respectively, deriving a two-dimensional spatial spectrum of a transformed incident signal using a pre-steered vector until the angle of arrival and the angular velocity become a maximum value, and estimating a peak value of the spatial spectrum as a measured angle of arrival and a measured angular velocity of the target (S1300).

Described herein are architectures, platforms and methods for implementing a direct estimation of a transmitter's position based upon raw radio frequency (RF) signals that are received by a portable device. A mathematical operation such as a maximum-likelihood estimation (MLE) algorithm, which utilizes collected snapshots from the received raw RF signals as variables, is implemented to perform direct estimation.

Described herein are architectures, platforms and methods for implementing a direct estimation of a transmitter's position based upon raw radio frequency (RF) signals that are received by a portable device. A mathematical operation such as a maximum-likelihood estimation (MLE) algorithm, which utilizes collected snapshots from the received raw RF signals as variables, is implemented to perform direct estimation.