Abstract: A capacitively coupled below-grade antenna is provided. The antenna includes a housing; a cap detachable from the housing, the cap having a top surface; a feeding element coupled to a radio module; and a radiating element provided on the cap along the top surface such that the radiating element is capacitively coupled with the feeding element.

Abstract: Systems and methods for quickly acquiring a PSS of a broadcast signal are provided. Such systems and methods include performing a time domain differential correlation on sections of the broadcast signal and identifying peak values in a summation of results of the time domain differential correlation. The systems and method also include performing frequency domain differential correlations between the frequency domain versions of the first section and the second section and identifying ones of maximum values of a ratio of output of the frequency domain differential correlations. Finally, the provided systems and methods include searching for the PSS in localized regions of the broadcast signal that are defined in the time domain by the preconfigured number of peak values and in the frequency domain by the ones of the maximum values of the ratio.

Abstract: This disclosure involves a system of using a patch antenna as a feed network-to-antenna array transitional element, the system comprising a driven patch, a first parasitic patch and a second parasitic patch, where the driven patch functions as a feed network-to-antenna array transitional element. The driven patch couples to both the first parasitic patch and the second parasitic patch. A first port of the driven patch couples to the first parasitic patch via an electric field intensity and to the second parasitic patch via a magnetic field intensity. A second port of the driven patch couples to the first parasitic patch via the magnetic field intensity and to the second parasitic patch via the electric field intensity. The magnitude and phase of the coupled fields change by tuning a gap between the driven patch and the first parasitic patch and a gap between the driven patch and the second parasitic patch.

Abstract: A horizontally-polarized omnidirectional antenna, including: a body including: a host printed circuit board (PCB) including: a metal-flooded ground plane, windows, and an interconnect providing a radio frequency (RF) signal splitting off into 2*Z0 transmission lines, a plurality of antenna elements, corresponding to respective windows, including: an antenna PCB including an antenna slot having a pullback region with the host PCB therein without directly contacting the pullback region, the window in the antenna slot, loops of conducting strips at top and bottom sides of the antenna PCB, slightly overlapping to form capacitive elements at overlap regions, a pair of input solder joints at respective input conducting strips on the top of the antenna PCB, on opposite sides of the window, a transmission feed solder joint directly between the pair of input solder joints across the window, connected to a Z0 feed line, and an RF connector receiving an antenna power supply.

Abstract: A vertically-polarized omnidirectional antenna, including: a body including: a host printed circuit board (PCB) including: first and second slots, and a metal flooded ground plane, first and second antenna PCBs forming four dipole pairs, the first and second antenna PCBs mounted to the host PCB, respective first to third ground connection fillet tabs, the first and second tabs being on an opposite side of the host PCB from the third tab, the first to third tabs being on a same side of its antenna PCB, an amplitude taper on each antenna PCB at transitions between the host and antenna PCBs, including: a first transmission line splitting off into a second transmission line and a third transmission line, the second transmission line feeding two antennas to form one dipole pair, the third transmission line stepping down using a quarter-wave transformer, and a radio frequency (RF) connector to receive a power supply.

Abstract: A system and method for 5G new radio (NR) low-density low density parity check (LDPC) decoding comprising performing a Fast Fourier Transform using a Fast Fourier Transform algorithm. The system and method determines if a reference sequence is present and performing a channel estimate and a channel interpolate for the channel estimate if the reference sequence is present. The system and method demodulates at least one orthogonal frequency division multiplexing (OFDM) symbol according to rbin*conj(Hbin)/(norm(Hbin)2+Noise_Power). The system and method decodes the demodulated at least one orthogonal frequency division multiplexing symbol, and determines if the decoded at least one orthogonal frequency division multiplexing symbol is correct.

Abstract: A method and system are provided herein for serial peripheral interface (SPI) control. The method may first include setting a general purpose input/output (GPIO) register to select an SPI data bus from at least one of an SPI master. The method may proceed to setting the SPI master to send a first data set of SPI serial data. The first data set may be provided to an SPI slave device. A second data set may be retrieved from the SPI slave device.

Abstract: A system and method for 5G new radio (NR) low-density low density parity check (LDPC) decoding comprising performing a Fast Fourier Transform using a Fast Fourier Transform algorithm. The system and method determines if a reference sequence is present and performing a channel estimate and a channel interpolate for the channel estimate if the reference sequence is present. The system and method demodulates at least one orthogonal frequency division multiplexing (OFDM) symbol according to rbin*conj(Hbin)/(norm(Hbin)2+Noise_Power). The system and method decodes the demodulated at least one orthogonal frequency division multiplexing symbol, and determines if the decoded at least one orthogonal frequency division multiplexing symbol is correct.

Abstract: A capacitively coupled below-grade antenna is provided. The antenna includes a housing; a cap detachable from the housing, the cap having a top surface; a feeding element coupled to a radio module; and a radiating element provided on the cap along the top surface such that the radiating element is capacitively coupled with the feeding element.

Abstract: An antenna system is provided. Such antenna system includes a first Vivaldi antenna element positioned in a first plane and including first and second radiating elements and a first slot disposed between the first and second radiating elements. The antenna system also includes a first signal feed electrically coupled across the first slot at a first location and a first conductive strip positioned in a second plane offset from and parallel to the first plane. The first conductive strip is positioned in the second plane such that a first longitudinal axis of the first conductive strip runs parallel to a first central axis of the first slot.

Abstract: Systems and methods for selecting a worst service first optimized test path are provided. Such systems and methods can include using previously collected RF results that are relevant to a target building to calculate predictive RF results for a plurality of test points in the target building, using the predictive RF results to calculate the optimized test path through the target building, measuring a respective actual RF signal value of each of the plurality of test points in succession along the optimized test path, counting failing ones of the plurality of test points, and stopping measurements of the respective actual RF signal value of each of the plurality test points when a counted number of the failing ones of the plurality of test points exceeds a failure threshold value.

Abstract: Systems and methods for retrieving RF coverage data for a geographic location and using the RF coverage data for the geographic area to alert a user device are provided. In some embodiments, such systems and methods can include receiving a notification of an emergency event at an emergency dispatch location associated with the geographic location, and pushing the RF coverage data for the geographic location to a first user device or directing the first user device to retrieve the RF coverage data for the geographic location. In some embodiments, such systems and method can include detecting when an ambient location of a second user device indicates proximity to and/or possible or likely entry of the second user device to a portion of the geographic area associated with the RF coverage data that is below a predetermined threshold and, responsive thereto, transmitting an alert to the second user device.

Abstract: A complex curvature conformal antenna system that can include an RF antenna element, a radome housing the RF antenna element, and a contour matching conformal gasket sealed to the radome such that, when the contour matching conformal gasket is installed on an installation surface having a complex compound curvature and features, the contour matching conformal gasket can be configured to conform to the complex compound curvature and features to seal the contour matching conformal gasket to the installation surface and protect the RF antenna element from external moisture, dust, or unwanted elements.

Abstract: An antenna system is provided that can include a plurality of parasitic elements connected to and extending from a ground plane, wherein each of the plurality of parasitic elements can be oriented at a common pitch angle, wherein each of the plurality of parasitic elements can be positioned at a uniform distance from a center of an antenna disposed on the ground plane, and wherein a respective length of each of the plurality of parasitic elements, the common pitch angle, and/or the uniform distance can be optimized so as to broaden a beamwidth of a radiation pattern produced by the antenna.

Abstract: Embodiments disclosed herein include an antenna assembly that includes a dual antenna support and isolation enhancer coupled to a first antenna element for isolating the first antenna element relative to a collocated, vertically-polarized antenna element. The dual antenna support and isolation enhancer can include tabs to support the first antenna element and shield a coaxial cable feeding the first antenna element, a base electrically connected to a shield of the coaxial cable for shorting to ground induced current on the shield of the coaxial cable, and, in some embodiments, at least one of a plurality of loading pins that can form a short-circuited LC resonator that can effectively open-circuit a gap of a coplanar strip transmission line that routes to a feed connection point of the first antenna element when vertically-polarized radiation is incident on the antenna assembly.

Abstract: Embodiments disclosed herein include systems and methods for locating all synchronization signal blocks on a 5G new radio channel. Such systems and methods can include measuring downlink signal energy over a bandwidth of the 5G new radio channel to identify a center frequency of a signal broadcast on the 5G new radio channel, processing the signal at the center frequency of the signal to identify a first of a plurality of synchronization signal blocks and global OFDM symbol boundaries for the wireless radio channel, and using the global OFDM symbol boundaries for all raster frequencies of the 5G new radio channel to identify remaining ones of the plurality of synchronization signal blocks.

Abstract: Systems and methods for time coordinating a plurality of RF data collection devices at disparate locations are provided. Such systems and methods can include synchronizing a local time of a first RF data collection device to an initial value of a common time source, generating a timestamp log file documenting a propensity of the local time to deviate from the common time source, collecting and recording a first plurality of RF data from an RF network, and using the timestamp log file to normalize the first plurality of RF data for comparison with a second plurality RF data recorded by a second RF data collection device.

Abstract: An RF antenna assembly and system are provided that can employ cost-effective geometry and manufacturing methods to control tolerance variations, thereby precisely controlling an antenna element of the RF antenna assembly during manufacturing and operation and enabling the RF antenna system to properly operate at high frequencies, such as in a 6-67 GHz frequency range. The RF antenna assembly can include a top alignment collar, a bottom alignment collar coupled to the top alignment collar by a press fit connection, and the antenna element secured from movement in all degrees of freedom and aligned for consistent RF operation by the top alignment collar and the press fit connection.

Abstract: Systems and methods for measuring wireless uplink signal quality of a P25 H-CPM uplink waveform are provided. In particular, such systems and methods can include calculating an SINR measurement and/or an FBER measurement for the P25 H-CPM uplink waveform to determine whether P25 user equipment has been successfully deployed.