A method of remotely controlling access to a resource comprising: transmitting a plurality of signals wherein each signal is transmitted using a different antenna from a plurality of antennas, detecting a received signal at a remote key, performing angle-of-arrival analysis on the received signal; and transmitting an authorisation message from the remote key if the received signal comprises a plurality of signal components with a predetermined characteristic.

A wireless communication apparatus includes a first antenna circuit that forms a beam selected from among a plurality of first beams through a beamforming process performed for communication using a millimeter wave band and a monitor that displays a first pattern indicating a radiation direction of the selected beam.

A wireless communication apparatus includes a first antenna circuit that forms a beam selected from among a plurality of first beams through a beamforming process performed for communication using a millimeter wave band and a monitor that displays a first pattern indicating a radiation direction of the selected beam.

The present invention discloses a system for identification of emission sources. The system has at least four stations, one being main station. The system operates in 0-6 frequency bands. Each station contains an antenna-feeder system, a multichannel radio receiving path, a control, analysis and signal processing system and a power supply system. The antenna-feeder system comprises a solid metal sheet paraboloid-shaped mirror, a 0 frequency band antenna, compensatory antennas in each of the frequency bands. The system also contains an identification friend or foe and a tactical air navigation (TACAN) systems' signals antenna and a GNSS signals antenna. The radio receiving path provides signals amplification for all bands, converting signals to intermediate frequency. Also the system provides means for timestamping received signals.

The present invention discloses a system for identification of emission sources. The system has at least four stations, one being main station. The system operates in 0-6 frequency bands. Each station contains an antenna-feeder system, a multichannel radio receiving path, a control, analysis and signal processing system and a power supply system. The antenna-feeder system comprises a solid metal sheet paraboloid-shaped mirror, a 0 frequency band antenna, compensatory antennas in each of the frequency bands. The system also contains an identification friend or foe and a tactical air navigation (TACAN) systems' signals antenna and a GNSS signals antenna. The radio receiving path provides signals amplification for all bands, converting signals to intermediate frequency. Also the system provides means for timestamping received signals.

A direction finding (DF) system and technique using a switched network architecture to couple a first plurality of antenna elements to a second, fewer, plurality of channels of an RF receiver. The RF receiver provides signals to a DF processor which combines data sampled at phase centers of the plurality of array elements. Such combined data samples may be used to estimate a direction of a received signal. The antenna elements may be configured into subarrays and a switch network couples different groups of subarrays to the RF receiver channels during different dwell times. Data collected during each dwell may be used to generate a spatial sample covariance matrix (SCM) and multiple spatial SCMs may be combined to provide aggregate covariance matrix values. A DF processor uses values from the aggregate covariance matrix to provide an output signal indicative of the direction of a received signal.

A direction finding (DF) system and technique using a switched network architecture to couple a first plurality of antenna elements to a second, fewer, plurality of channels of an RF receiver. The RF receiver provides signals to a DF processor which combines data sampled at phase centers of the plurality of array elements. Such combined data samples may be used to estimate a direction of a received signal. The antenna elements may be configured into subarrays and a switch network couples different groups of subarrays to the RF receiver channels during different dwell times. Data collected during each dwell may be used to generate a spatial sample covariance matrix (SCM) and multiple spatial SCMs may be combined to provide aggregate covariance matrix values. A DF processor uses values from the aggregate covariance matrix to provide an output signal indicative of the direction of a received signal.

The present invention relates to a radiation source orientation technology. The invention discloses a method for optimizing the orientation performance of radiation source orientation system, which comprises the following steps: establishing a radiation source orientation matrix; obtaining the non-zero singular value of the orientation matrix; classifying orientation noise that affects the radiation source orientation system according to the distribution characteristic of noise energy; determining the optimal orientation matrix of the radiation source orientation system according to the minimum non-zero singular value .sub.min of the orientation matrix and its number of array elements m; determining the optimal orientation array according to the non-zero singular value of orientation matrix considering the distribution of different noise energy. The invention lays a foundation for the optimal design of a non-planar array in a radiation source orientation system. The optimal orientation matrix and array provided by the invention can be used to effectively improve the orientation accuracy of the radiation source orientation system and the resistance of the orientation system to interference.

A receiving circuit uses a weight set by calibration to weight signals incident to receiving elements. A storing unit stores a measured value of a mode vector reflecting characteristics of the receiving circuit in an error-free state of the weight for the receiving circuit characteristics and further correlates and stores an incident signal angle estimated by an estimating unit, and for the error-free state, a calculation result of an evaluation value by an evaluation function capable of calculating the evaluation value, which varies according to the incident signal angle and error. A detecting unit calculates the evaluation value based on the stored measured value of the mode vector and the evaluation function and detects an occurrence of the error based on comparison of the calculated evaluation value and the stored evaluation value, when the estimated incident signal angle corresponds to a value close to the stored incident signal angle.

A receiving circuit uses a weight set by calibration to weight signals incident to receiving elements. A storing unit stores a measured value of a mode vector reflecting characteristics of the receiving circuit in an error-free state of the weight for the receiving circuit characteristics and further correlates and stores an incident signal angle estimated by an estimating unit, and for the error-free state, a calculation result of an evaluation value by an evaluation function capable of calculating the evaluation value, which varies according to the incident signal angle and error. A detecting unit calculates the evaluation value based on the stored measured value of the mode vector and the evaluation function and detects an occurrence of the error based on comparison of the calculated evaluation value and the stored evaluation value, when the estimated incident signal angle corresponds to a value close to the stored incident signal angle.