Abstract: A modular wideband antenna includes a ground plane, first and second antenna elements disposed on a first surface of a substrate, a first portion of a two-layer feed balun disposed on the first surface of the substrate, and electrically coupled to the first and second antenna elements, and to the ground plane, a second portion of the two-layer feed balun disposed on a second surface of the substrate, the second portion of the two-layer feed balun being electrically coupled to a signal feed, and being capacitively coupled to the first portion of the two-layer feed balun, first and second coupling capacitances disposed on the second surface of the substrate, the first coupling capacitance being capacitively coupled to the first antenna element, and the second coupling capacitance being capacitively coupled to the second antenna element, and first and second grounding posts being electrically coupled to the first and second coupling capacitances.

Abstract: A modular wideband antenna includes a ground plane, first and second antenna elements disposed on a first surface of a substrate, a first portion of a two-layer feed balun disposed on the first surface of the substrate, and electrically coupled to the first and second antenna elements, and to the ground plane, a second portion of the two-layer feed balun disposed on a second surface of the substrate, the second portion of the two-layer feed balun being electrically coupled to a signal feed, and being capacitively coupled to the first portion of the two-layer feed balun, first and second coupling capacitances disposed on the second surface of the substrate, the first coupling capacitance being capacitively coupled to the first antenna element, and the second coupling capacitance being capacitively coupled to the second antenna element, and first and second grounding posts being electrically coupled to the first and second coupling capacitances.

Abstract: Using High-beam and low-beam transmission signals that have different antenna tilts, different beam-widths, and different polarizations than one another may provide performance advantages in wireless networks. The high-beam transmission signal and the low-beam transmission signal may have orthogonal polarizations. For example, the high-beam transmission signal and the low-beam transmission signal may be linearly polarized signals having different electromagnetic field (E-field) polarization angles with respect to the y-axis, e.g., +/?forty-five degrees with respect to a vertically polarized wave. As another example, the high-beam transmission signal may be a vertically polarized signal, and the low-beam transmission signal may be a horizontally polarized signal, or vice-versa. In addition to having orthogonal polarizations, the low-beam transmission signal may have a greater antenna beam down-tilt angle, and a wider beam-width than the high-beam transmission signal.

Abstract: Using High-beam and low-beam transmission signals that have different antenna tilts, different beam-widths, and different polarizations than one another may provide performance advantages in wireless networks. The high-beam transmission signal and the low-beam transmission signal may have orthogonal polarizations. For example, the high-beam transmission signal and the low-beam transmission signal may be linearly polarized signals having different electromagnetic field (E-field) polarization angles with respect to the y-axis, e.g., +/?forty-five degrees with respect to a vertically polarized wave. As another example, the high-beam transmission signal may be a vertically polarized signal, and the low-beam transmission signal may be a horizontally polarized signal, or vice-versa. In addition to having orthogonal polarizations, the low-beam transmission signal may have a greater antenna beam down-tilt angle, and a wider beam-width than the high-beam transmission signal.

Abstract: Using High-beam and low-beam transmission signals that have different antenna tilts, different beam-widths, and different polarizations than one another may provide performance advantages in wireless networks. The high-beam transmission signal and the low-beam transmission signal may have orthogonal polarizations. For example, the high-beam transmission signal and the low-beam transmission signal may be linearly polarized signals having different electromagnetic field (E-field) polarization angles with respect to the y-axis, e.g., +/? forty-five degrees with respect to a vertically polarized wave. As another example, the high-beam transmission signal may be a vertically polarized signal, and the low-beam transmission signal may be a horizontally polarized signal, or vice-versa. In addition to having orthogonal polarizations, the low-beam transmission signal may have a greater antenna beam down-tilt angle, and a wider beam-width than the high-beam transmission signal.

Abstract: Embodiments are provided for cross-polarized antennas design with different down tilt angles that support versatile functionality, such as for MIMO or beamforming. An embodiment antenna circuit comprises a baseband signal processor, a pair of RF transmitters coupled to the baseband signal processor, a pair of PAs coupled to the RF transmitters, a 90°/180° hybrid coupler coupled to the RF transmitters, a pair of duplexers and two antennas coupled to the PAs. The two antennas are down tilted at different down tilt angles. A pair of signals is generated using the baseband signal processor, transmitted by the RF transmitters, and amplified using the PAs. Additionally, a 90° or 180° phase difference is introduced into the signals using the 90°/180° hybrid coupler. After the amplifying and introducing the phase difference, the signals are polarized at two different polarizations and down tilted at different down tilt angles using the two antennas.

Abstract: A RF distribution network for split beam antennas is disclosed. The split beam antennas may include four-column cross-polarized user specific tilt antennas implemented in a 4T4R or 4T8R system. A RF distribution network may provide transmit signals from transmitters to antennas while also providing receive signals from the antennas. A RF distribution network may include 180° 6.9 dB combiners coupled to the antennas and also coupled 90° hybrids. A 180° 6.9 dB combiner may include a transmission network with transmission lines in a 4T4R system. Alternatively, a 180° 6.9 dB combiner may include a transmission network with transmit and receive filters in a 4T8R system. The transmission network couples the transmit filter and two filters by at least three ?/4 transmission lines. A transmission network provides isolation between two receive signal paths and, at the same time, provides power splitting of transmitter power to two duplexed transmit signal paths.

Abstract: A method for providing feedback information includes receiving a configuration of a plurality of offset values, determining the feedback information in accordance with at least one measurement made by a user equipment and with the plurality of offset values, and sending the feedback information to a network controller.

Abstract: Disclosed herein is a dual-feed dual-polarized antenna element and a method for manufacturing the same. An embodiment dual-polarization antenna element includes four radiating elements and eight feed ports. The four radiating elements are arranged in a co-planar diamond pattern. The neighboring elements of the four radiating elements form four shared-element dipole antenna elements. Each of the four radiating elements is shared between two cross-polarized dipole antenna elements of the four shared-element dipole antenna elements. The eight feed ports are arranged in four cross-polarized dual-feed pairs respectively disposed on the four radiating elements. Each feed port of the four cross-polarized dual-feed pairs is operable to respectively excite one of the four radiating elements for a cross-polarized one of the four shared-element dipole antenna elements.

Abstract: An apparatus in a user equipment node (UE) is configured to perform a method for channel feedback. The method includes determining, based on a common reference signal received from a base station and one or more channel conditions, a plurality of values for a receiver table. The method also includes determining a plurality of values for a decision table based on corresponding values in the receiver table and a predetermined interference table. The method further includes selecting a value from the decision table. In addition, the method includes transmitting, to the base station, at least one of a rank indicator (RI) value and a precoding matrix indicator (PMI) value associated with the selected value in the decision table.

Abstract: A RF distribution network for split beam antennas is disclosed. The split beam antennas may include four-column cross-polarized user specific tilt antennas implemented in a 4T4R or 4T8R system. A RF distribution network may provide transmit signals from transmitters to antennas while also providing receive signals from the antennas. A RF distribution network may include 180° 6.9 dB combiners coupled to the antennas and also coupled 90° hybrids. A 180° 6.9 dB combiner may include a transmission network with transmission lines in a 4T4R system. Alternatively, a 180° 6.9 dB combiner may include a transmission network with transmit and receive filters in a 4T8R system. The transmission network couples the transmit filter and two filters by at least three ?/4 transmission lines. A transmission network provides isolation between two receive signal paths and, at the same time, provides power splitting of transmitter power to two duplexed transmit signal paths.

Abstract: Embodiments are provided for cross-polarized antennas design with different down tilt angles that support versatile functionality, such as for MIMO or beamforming. An embodiment antenna circuit comprises a baseband signal processor, a pair of RF transmitters coupled to the baseband signal processor, a pair of PAs coupled to the RF transmitters, a 90°/180° hybrid coupler coupled to the RF transmitters, a pair of duplexers and two antennas coupled to the PAs. The two antennas are down tilted at different down tilt angles. A pair of signals is generated using the baseband signal processor, transmitted by the RF transmitters, and amplified using the PAs. Additionally, a 90° or 180° phase difference is introduced into the signals using the 90°/180° hybrid coupler. After the amplifying and introducing the phase difference, the signals are polarized at two different polarizations and down tilted at different down tilt angles using the two antennas.

Abstract: System and method embodiments are provided for null filling of IQ waveform. In an embodiment method, samples below a predetermined threshold are selected from a plurality of samples of an input signal. Amplitude values of a complex null-fill function are then calculated to push amplitudes of the samples below the predetermined threshold to a signal level at the predetermined threshold. The phase values of the complex null-fill function are calculated to push the samples of the input signal in an IQ plane in a defined direction from a point closest to a zero signal value. The resulting complex null-fill function is filtered within a predetermined bandwidth of the input signal, and then added to the input signal to provide a modified input signal for amplification.

Abstract: Embodiments are provided for cross-polarized antennas design with different down tilt angles that support versatile functionality, such as for MIMO or beamforming. An embodiment antenna circuit comprises a baseband signal processor, a pair of RF transmitters coupled to the baseband signal processor, a pair of PAs coupled to the RF transmitters, a 90°/180° hybrid coupler coupled to the RF transmitters, a pair of duplexers and two antennas coupled to the PAs. The two antennas are down tilted at different down tilt angles. A pair of signals is generated using the baseband signal processor, transmitted by the RF transmitters, and amplified using the PAs. Additionally, a 90° or 180° phase difference is introduced into the signals using the 90°/180° hybrid coupler. After the amplifying and introducing the phase difference, the signals are polarized at two different polarizations and down tilted at different down tilt angles using the two antennas.

Abstract: Using High-beam and low-beam transmission signals that have different antenna tilts, different beam-widths, and different polarizations than one another may provide performance advantages in wireless networks. The high-beam transmission signal and the low-beam transmission signal may have orthogonal polarizations. For example, the high-beam transmission signal and the low-beam transmission signal may be linearly polarized signals having different electromagnetic field (E-field) polarization angles with respect to the y-axis, e.g., +/? forty-five degrees with respect to a vertically polarized wave. As another example, the high-beam transmission signal may be a vertically polarized signal, and the low-beam transmission signal may be a horizontally polarized signal, or vice-versa. In addition to having orthogonal polarizations, the low-beam transmission signal may have a greater antenna beam down-tilt angle, and a wider beam-width than the high-beam transmission signal.

Abstract: A method for providing feedback information includes receiving a configuration of a plurality of offset values, determining the feedback information in accordance with at least one measurement made by a user equipment and with the plurality of offset values, and sending the feedback information to a network controller.

Abstract: Disclosed herein is a dual-feed dual-polarized antenna element and a method for manufacturing the same. An embodiment dual-polarization antenna element includes four radiating elements and eight feed ports. The four radiating elements are arranged in a co-planar diamond pattern. The neighboring elements of the four radiating elements form four shared-element dipole antenna elements. Each of the four radiating elements is shared between two cross-polarized dipole antenna elements of the four shared-element dipole antenna elements. The eight feed ports are arranged in four cross-polarized dual-feed pairs respectively disposed on the four radiating elements. Each feed port of the four cross-polarized dual-feed pairs is operable to respectively excite one of the four radiating elements for a cross-polarized one of the four shared-element dipole antenna elements.

Abstract: Embodiments are provided for cross-polarized antennas design with different down tilt angles that support versatile functionality, such as for MIMO or beamforming. An embodiment antenna circuit comprises a baseband signal processor, a pair of RF transmitters coupled to the baseband signal processor, a pair of PAs coupled to the RF transmitters, a 90°/180° hybrid coupler coupled to the RF transmitters, a pair of duplexers and two antennas coupled to the PAs. The two antennas are down tilted at different down tilt angles. A pair of signals is generated using the baseband signal processor, transmitted by the RF transmitters, and amplified using the PAs. Additionally, a 90° or 180° phase difference is introduced into the signals using the 90°/180° hybrid coupler. After the amplifying and introducing the phase difference, the signals are polarized at two different polarizations and down tilted at different down tilt angles using the two antennas.

Abstract: Multiple radio frequency (RF) modules can be arranged in a multi-sector configuration. Each RF modules may have a wedge-like shape such that the RF modules may be adjacently affixed to one another in spherical cluster, thereby providing multi-sector coverage while maintaining a relatively compact active antenna installation. Additionally, multiple clusters of RF modules can be arranged in an array to provide beamforming and/or other advances antenna functionality.

Abstract: System and method embodiments are provided for null filling of IQ waveform. In an embodiment method, samples below a predetermined threshold are selected from a plurality of samples of an input signal. Amplitude values of a complex null-fill function are then calculated to push amplitudes of the samples below the predetermined threshold to a signal level at the predetermined threshold. The phase values of the complex null-fill function are calculated to push the samples of the input signal in an IQ plane in a defined direction from a point closest to a zero signal value. The resulting complex null-fill function is filtered within a predetermined bandwidth of the input signal, and then added to the input signal to provide a modified input signal for amplification.