An example system can include a first antenna having a first orientation, a second antenna having a second orientation and a control system communicating with the first antenna and the second antenna. The control system performs operations which can include determining a pathway of a satellite, comparing the pathway to a first radiation pattern of the first antenna and a second radiation pattern of the second antenna, wherein the first antenna and the second antenna are each positioned such that a first keyhole of the first antenna does not overlap a second keyhole of the second antenna, to yield a comparison and selecting, based on the comparison, one of the first antenna or the second antenna to communicate with the satellite along the pathway.

A digital receiving apparatus includes an analog-to-digital conversion module, a polyphase filter module, a fast Fourier transform module and a phase compensation module, which transforms signals of a target radio source from time domain to frequency domain. It further includes a standard time acquisition module configured to acquire a standard timestamp, a communication module configured to communicate with a host computer, a delay parameter temporary storage module configured to store a to-be-compensated delay parameter, a control enable module configured to generate an enable signal, a delay module configured to perform delay, and a phase parameter generation module configured to temporarily store the to-be-compensated delay parameter and convert it into a phase compensation parameter. The present invention achieves precise synchronous system startup, and the to-be-compensated parameter is updated and aligned in real time to compensate for a time-varying delay difference to accurately track with precision and observe the target radio source.

A corner sensor for a motor vehicle capable of communicating over a wireless communication link with an authentication device and including: an array of antennae; and an electronic control unit configured to: determine the phase difference between the segments received by the antennae; determine the probability of each angle of incidence over a range of angles that is predetermined on the basis of the determined phase differences and of a predefined table, so as to determine a probability profile; measure the power of the segments received by the antennae of the array of antennae so as to determine a power profile; determine the actual angle of incidence of the signal by multiplying the probability profile with the power profile; and send the value of the determined actual angle of incidence to a central electronic control unit of the vehicle.

A communication device includes: a plurality of wireless communication sections, each of which is configured to wirelessly receive a signal from another communication device; and a control section configured to perform a detection process of detecting specific elements with regard to a plurality of correlation computation results, each of which is obtained by correlating a first signal that is transmitted from the other communication device and each of second signals at the designated interval and includes a correlation value indicating magnitude of correlation between the first signal and the second signal as an element obtained at the designated interval, and control a change process of treating a wireless communication section having earliest time corresponding to the specific element as a first wireless communication section among the plurality of wireless communication sections, treating the other wireless communication section as a second wireless communication section among the plurality of wireless communication sections.

A communication device includes: a plurality of wireless communication sections, each of which is configured to wirelessly receive a signal from another communication device; and a control section configured to perform a detection process of detecting specific elements with regard to a plurality of correlation computation results, each of which is obtained by correlating a first signal that is transmitted from the other communication device and each of second signals at the designated interval and includes a correlation value indicating magnitude of correlation between the first signal and the second signal as an element obtained at the designated interval, and control a change process of treating a wireless communication section having earliest time corresponding to the specific element as a first wireless communication section among the plurality of wireless communication sections, treating the other wireless communication section as a second wireless communication section among the plurality of wireless communication sections.

A communication device includes: a plurality of wireless communication sections, each of which is configured to wirelessly receive a signal from another communication device; and a control section configured to detect a specific element in chronological information based on respective pulse signals received by the plurality of wireless communication sections, on the basis of respective pieces of chronological information including, as elements related to time, information that chronologically changes and that is obtained when the plurality of wireless communication sections receive the respective pulse signals transmitted from the other communication device, verify whether each of a plurality of the detected specific elements is based on the pulse signal coming through a shortest path, and estimate an angle from which the pulse signal has come while using axes extending from reference point, on the basis of the plurality of specific elements that are verified as elements based on the pulse signals.

A digital receiving apparatus includes an analog-to-digital conversion module, a polyphase filter module, a fast Fourier transform module and a phase compensation module, which transforms signals of a target radio source from time domain to frequency domain. It further includes a standard time acquisition module configured to acquire a standard timestamp, a communication module configured to communicate with a host computer, a delay parameter temporary storage module configured to store a to-be-compensated delay parameter, a control enable module configured to generate an enable signal, a delay module configured to perform delay, and a phase parameter generation module configured to temporarily store the to-be-compensated delay parameter and convert it into a phase compensation parameter. The present invention achieves precise synchronous system startup, and the to-be-compensated parameter is updated and aligned in real time to compensate for a time-varying delay difference to accurately track with precision and observe the target radio source.

A system for determining a direction of arrival for signals is provided. The system includes a non-uniform linear array including a plurality of antenna and configured to receive a wireless signal. The system is programmed to receive a plurality of normalized phase candidates for the direction of arrival of the received wireless signal. For each of the plurality of normalized phase candidates, the at least one processor is programmed to calculate a phase error, estimate a plurality of unwrapped measured phases based on the corresponding phase error, and calculate a likelihood based on the corresponding plurality of unwrapped measured phases. The at least one processor is further programmed to select a normalized phase candidate as a direction of arrival estimate based on a comparison of the plurality of likelihood normalized phases.

A system for determining a direction of arrival for signals is provided. The system includes a non-uniform linear array including a plurality of antenna and configured to receive a wireless signal. The system is programmed to receive a plurality of normalized phase candidates for the direction of arrival of the received wireless signal. For each of the plurality of normalized phase candidates, the at least one processor is programmed to calculate a phase error, estimate a plurality of unwrapped measured phases based on the corresponding phase error, and calculate a likelihood based on the corresponding plurality of unwrapped measured phases. The at least one processor is further programmed to select a normalized phase candidate as a direction of arrival estimate based on a comparison of the plurality of likelihood normalized phases.

A system includes a transceiver and an access module. The transceiver is implemented at a vehicle: receives a first RF signal from a portable access device via multiple antennas; transmits a second RF signal from the vehicle to the portable access device; and receives a third RF signal from the portable access device. The third RF signal indicates an AOD of the first RF signal or a second AOA of the second RF signal as received at the portable access device. The access module: estimates a first AOA of the first RF signal; determines a resultant AOA based on the first AOA and the AOD or the second AOA; determines a location of the portable access device relative to the vehicle based on the resultant AOA; and permits access to the vehicle or control of a portion of the vehicle based on the location of the portable access device.