Abstract: The present invention relates to a clamping device for a base station antenna and, more particularly, to a clamping device for a base station antenna, comprising: a guide arm unit which is arranged to extend horizontally to a side, so as to be perpendicular to a support pole arranged vertically; and a tilting unit which is arranged in the guide arm unit and adjusts the tilting angle with respect to the support pole by moving, based on a lower end portion of an antenna module having a fixed hinge position, an upper end portion of the antenna module in the horizontal direction in the guide arm unit. Thus, an advantage of improving the convenience of installation work and reliability of a product can be provided.

Abstract: Systems and methods relating to multi-beam forming networks using an antenna array. A matrix circuit for feeding elements of an antenna array to produce multiple beams is provided. To address beam squint issues, beam squint is mitigated by using a series of phase shifters with specific phase-delay performances between the matrix circuit and the antenna array elements. A linearly increasing or decreasing phase difference in the signals fed into adjacent antenna array elements across the array mitigates or eliminates beam squint in the resulting multiple beams. The phase shifters are programmed to provide this increasing or decreasing phase differences.

Abstract: There is presented a wireless device for dual-polarization beamforming. The wireless device comprises an antenna array. The antenna array comprises antenna elements of mutually orthogonal polarizations and a baseband chain. The antenna elements of both polarizations are operatively connected to the baseband chain. There is also presented a method for dual-polarization beamforming as performed by such a wireless device.

Abstract: Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams.

Abstract: A method for radiating a co-located antenna including radiating the co-located antenna using a dual mode, where the co-located antenna has an inter-element spacing of about 1? and the dual mode includes a TM11 mode and a TM21 mode. The TM11 mode is radiated to generate a TM11 far field pattern, where the TM11 mode has a broadside pattern characterized with a beam peak at broadside and the TM11 mode produces grating lobes in addition to the beam peak at broadside. The TM21 mode is radiated to generate a TM21 far field pattern orthogonal to the TM11 far field pattern, thereby causing the TM21 mode to produce a null at broadside to suppress the grating lobes produced by the TM11 mode.

Abstract: A radio frequency (RF) beam transmission component having optical inputs and electrical outputs may include a wavelength selective switch (WSS) that has a plurality of optical WSS outputs. Each optical WSS output may be configured to transmit one or more wavelengths of the incoming optical signals. The RF beam transmission component may include a plurality of photodetectors (PD), each photodetector having an optical PD input coupled to one or more of said plurality of optical WSS outputs and a corresponding electrical output of a plurality of PD electrical outputs. The RF beam transmission component may further include a lens that has a plurality of electrical inputs and each electrical input may be electrically coupled to at least one of the plurality of electrical PD outputs. The lens may further have a plurality of electrical lens output ports.

Abstract: A base station antenna includes a first set of radiating elements that are configured to generate a first antenna beam that has a first peanut-shaped antenna pattern in an azimuth plane and a second set of radiating elements that are configured to generate a second antenna beam that has a second peanut-shaped antenna pattern in the azimuth plane. A longitudinal axis of the first peanut-shaped antenna pattern in the azimuth plane is rotated approximately ninety degrees from a longitudinal axis of the second peanut-shaped antenna pattern in the azimuth plane.

Abstract: This document describes techniques and systems of a radar system with paired one-dimensional (1D) and two-dimensional (2D) antenna arrays. Even with fewer antenna elements than a traditional radar system, the paired arrays enable an example radar system to have a comparable angular resolution at a lower cost. For example, the 1D array includes antenna elements positioned in a first direction (e.g., azimuth direction) and spaced by a first distance and a second distance. The 2D array includes at least four other antenna elements positioned in the first direction and a second direction (e.g., elevation direction). The other antenna elements are spaced by a third distance in the second direction and by the sum of the first direction and the second direction in the first direction. A processor can associate, using shared angle estimates, angles in the first direction and the second direction for respective objects.

Abstract: A 2-axis bracket assembly with smart linear actuators forms a mount for one or more sensors, and is controllable via a remote smart controller for the actuators, which may in turn be controlled by a remote PC and may control multiple 2-axis bracket assemblies. A two-axis gimballed support is mounted to an elevated structure, and a sensor is fixed thereto. The gimballed support includes a gimbal assembly, and a bracket to mount the assembly on a pole, a bracket assembly to hold the sensor. The gimbal assembly connects the pole bracket to the sensor bracket, permitting two-axis motion therebetween. Two smart linear actuators, one connecting the pole bracket to the gimbal assembly, and one connecting the sensor bracket to the gimbal assembly control the position of the sensor bracket and the sensor.

Abstract: According to various embodiments, an electronic device is provided. The electronic device includes at least one communication processor, an intermediate frequency integrated circuit (IFIC) configured to output at least one of a first intermediate frequency (IF) signal corresponding to a first polarization characteristic and a second IF signal corresponding to a second polarization characteristic, based on a baseband signal generated from the at least one communication processor, a radio frequency integrated circuit (RFIC) configured to control at least one antenna element to generate a radio frequency (RF) signal, based on at least one of the first IF signal or the second IF signal, and an antenna array including at least one antenna element configured to generate and transmit the RF signal. The RFIC may include a first diplexer configured to receive the first IF signal and a second diplexer configured to receive the second IF signal.

Abstract: A multibeam antenna is provided comprising a direct radiating array, DRA, and a reflector arranged to reflect signals radiated from the DRA in a transmission mode and to reflect signals to the DRA in a reception mode. The antenna is a very high throughput satellite (VHTS) antenna providing global coverage with narrow, high gain beams.

Abstract: Systems and methods for digitally synthesizing chirp signal in a low intermediate frequency (IF) band and using frequency multipliers to generate a higher frequency signal for radar applications are described. An embodiment includes a chirp signal generator that includes: a direct digital frequency synthesizer (DDFS) that is configured to receive an input sync signal and a frequency reference signal and generate several chirp signals at a first frequency that is in a low intermediate frequency (IF) band, several frequency multipliers that are configured to increase the chirp signals to higher frequencies and several bandpass filter circuits that are configured to remove nonlinearities from the chirp signals to generate a clean output signal.

Abstract: A system is described for tracking vehicle position using a smart phone or similar device as an active transponder that communicates with roadside equipment. The system may uses existing RF transceivers on the smart-phone, such as Bluetooth® LE or WiFi to periodically transmit an identifying message. Road-based equipment detects and locates the smart phone. In a further aspect, the smart phone is alerted by roadside beacons and responds with identification information. Transaction processing may be performed either on the smart phone or by roadside or back office equipment. The system may be used for automated roadway tolling and monitoring and also for access control. A coded card may be scanned by the smart card to enter identification for access control.

Abstract: Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Abstract: Provided is an antenna device capable of efficiently transmitting millimeter wave band signals. The antenna device includes plural antennas, a first Butler matrix circuit, and a second Butler matrix circuit. The plural antennas are disposed apart from each other. The first Butler matrix circuit is connected to each of the plural antennas. The second Butler matrix circuit is connected to each of the plural antennas. In each of the plural antennas, a first feed point connected to the first Butler matrix circuit and a second feed point connected to the second Butler matrix circuit are disposed apart from each other.

Abstract: An adaptive array antenna system receives a desired wave arriving through K time slots each allocated to one of K transmitting stations. In the adaptive array antenna system, an adaptive control device includes a correlation matrix calculating unit, a correlation matrix storing unit, an inverse matrix calculating unit, and a weighting factor calculating unit. The inverse matrix calculating unit acquires a correlation matrix having been calculated at previous time for another time slot other than the current time slot from the correlation matrix storing unit, regards the acquired correlation matrix as an interference noise correlation matrix, and calculates an inverse matrix of the interference noise correlation matrix. The weighting factor calculating unit calculates values of a plurality of weighting factors used by a beamforming unit using the inverse matrix.

Abstract: An antenna arrangement having a stacked layered structure. The antenna arrangement includes a radiation layer including one or more radiation elements, and a distribution layer facing the radiation layer. The distribution layer is arranged to distribute a radio frequency signal to the one or more radiation elements. The distribution layer includes at least one distribution layer feed and a first electromagnetic bandgap, EBG, structure arranged to form at least one first waveguide intermediate the distribution layer and the radiation layer. The first EBG structure is also arranged to prevent electromagnetic propagation in a frequency band of operation from propagating from the at least one first waveguide in directions other than through the at least one distribution layer feed and the one or more radiation elements. The distribution layer includes a plurality of distribution modules and a positioning structure, the positioning structure is arranged to fix the distribution modules in position.

Abstract: A beam layout is optimised for a given traffic distribution and network state by determining optimum beam centre positions and generating a beam layout so as to meet system requirements and minimise the distances of locations within a coverage area from the optimum beam centre positions. Adjacent beams in low traffic areas may be merged.

Abstract: An array antenna includes a plurality of mechanically separate radiating panels arranged side-by-side, means for applying a shaping to the signals transmitted by the radiating elements of the panels and a device for managing the shaping of the signals, wherein the shaping coefficients correspond to a sum of at least: a shaping coefficient (Wco) making it possible to orient the maximum gain of the antenna in a given direction, and at least the opposite of a shaping coefficient (Wc) making it possible to orient the maximum gain of the antenna in the direction of a side lobe resulting from differences between the radiating panels of the array antenna. The method relates also to the associated transmission/reception method.

Abstract: A radio detection and ranging (RADAR) sensor system for vehicles, such as autonomous vehicles, includes a first RADAR sensor configured to provide first RADAR data descriptive of an environment of a vehicle having a first antenna configured to output a first RADAR beam having a first azimuthal component over a first angular range and a second RADAR sensor configured to provide second RADAR data descriptive of the environment of the vehicle, the second RADAR sensor having a second antenna configured to output a second RADAR beam having a second azimuthal component that is narrower than the first azimuthal component of the first RADAR beam, wherein the second RADAR sensor is configured to sweep the second RADAR beam over a second angular range closer to a rear of the vehicle than a front of the vehicle to obtain the second RADAR data.

Abstract: An antenna assembly includes a plurality of antenna elements disposed in a circular pattern and equidistant from each other in angular separation relative to a common reference point at a center of the circular pattern. The antenna assembly may include or be operably coupled to a phase control module configured to apply selected phase fronts to each of the antenna elements to generate constructive and destructive interference patterns to define a directive beam in a desired direction. The selected phase fronts may include no phase adjustment, a positive phase adjustment value and a negative phase adjustment value, the positive and negative phase adjustment values each having a same magnitude.

Abstract: Methods and systems are described for providing end-to-end beamforming. For example, end-to-end beamforming systems include end-to-end relays and ground networks to provide communications to user terminals located in user beam coverage areas. The ground segment can include geographically distributed access nodes and a central processing system. Return uplink signals, transmitted from the user terminals, have multipath induced by a plurality of receive/transmit signal paths in the end to end relay and are relayed to the ground network. The ground network, using beamformers, recovers user data streams transmitted by the user terminals from return downlink signals. The ground network, using beamformers generates forward uplink signals from appropriately weighted combinations of user data streams that, after relay by the end-end-end relay, produce forward downlink signals that combine to form user beams.

Abstract: An electronic device includes an indoor positioner and a positioning engine server. The indoor positioner has an antenna array including a plurality of antenna units. The indoor positioner divides the antenna units into multiple antenna unit groups, receives a wireless signal from user equipment at each time point via the antenna unit groups, and calculates a plurality of angles of arrival (AOA) corresponding to the antenna unit groups at each time point. The positioning engine server receives and stores the angles of arrival corresponding to the antenna unit groups at each time point, and filters the angles of arrival according to the angle sizes of the angles of arrival corresponding to the antenna unit groups at each time point stored in an observation period.

Abstract: Disclosed is a cylindrical array radar including: a ring array having a plurality of Tx/Rx modules arranged in a circular shape for transmitting and receiving high-frequency signals of a radar frequency band, and a ring array signal processing unit arranged at the center of the array of the Tx/Rx modules for processing signal data exchanged with the plurality of Tx/Rx modules; and a main signal processing unit that performs antenna beamforming for the plurality of Tx/Rx modules and signal processing for detecting and tracking a target. It is possible to achieve omnidirectional antenna detection without mechanical rotation and easily obtain performance change.

Abstract: An antenna arrangement comprises a dual-polarised turnstile antenna, which comprises a first and a second dipole antenna element, which are aligned perpendicular to one another. The first and second dipole antenna elements each comprises two dipole halves. The dipole halves of both dipole antenna elements comprise a dipole section and a coupling section, which are galvanically connected to each other and to a first end of a ground connection medium or a signal connection medium. The coupling sections each extend along the closest dipole section of the adjacent other first and/or second dipole antenna element, wherein a spacing gap is formed between a coupling side of the respective coupling section of the first and/or second dipole antenna element and the respective adjacent dipole section of the second and/or dipole antenna element.

Abstract: A method for radiating a co-located antenna including radiating the co-located antenna using a dual mode, where the co-located antenna has an inter-element spacing of about 1?, and the dual mode includes a TM11 mode and a TM21 mode. The TM11 mode is radiated to generate a TM11 far field pattern, where the TM11 mode has a broadside pattern characterized with a beam peak at broadside and the TM11 mode produces grating lobes in addition to the beam peak at broadside. The TM21 mode is radiated to generate a TM21 far field pattern orthogonal to the TM11 far field pattern, thereby causing the TM21 mode to produce a null at broadside to suppress the grating lobes produced by the TM11 mode.

Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a Hybrid Automatic Repeat Request (HARQ) protocol using multiple beams. In some aspects, the UE may receive a first HARQ transmission from a base station (BS) via a first beam, and may transmit a HARQ feedback to the first BS. The BS may receive the HARQ feedback message and determine whether to transmit a HARQ retransmission associated with the first HARQ transmission via the first beam or via a different beam (such as a second beam) based on beam-specific conditions. The BS may provide a HARQ retransmission beam indication to the UE indicating that the HARQ retransmission will be transmitted via the second beam. The BS may transmit the HARQ retransmission via the second beam. The UE may receive the HARQ retransmission associated with the first HARQ transmission via the second beam.

Abstract: A phased array antenna system that reduces the high number of active elements and complexity. In order to achieve this reduction, the RF chain is designed for summation of all radiators in a single row. This reduces the hardware complexity from N2 to N where the array size is N×N. This reduction allows the antenna to electronically steer in one axis. The other axis is mechanically steered using a rotating platform. The loss between the LNA or PA with the row summation scheme is very low resulting in very high performance. Receiving and transmitting take place from the same aperture.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station (BS) may determine, for a user equipment (UE) operating in a mobility state, route information. The BS may transmit, to the UE, information identifying a set of beams based at least in part on the route information. The UE may perform a set of neighbor cell measurements, in connection with movement along the predicted route, using the set of beams. Numerous other aspects are provided.

Abstract: There is presented a wireless device for dual-polarization beamforming. The wireless device comprises an antenna array. The antenna array comprises antenna elements of mutually orthogonal polarizations and a baseband chain. The antenna elements of both polarizations are operatively connected to the baseband chain. There is also presented a method for dual-polarization beamforming as performed by such a wireless device.

Abstract: A wireless communication device includes first and second links. The first and second links respectively include first and second sets of antennae having an arrangement that renders a null space of a channel matrix between the first and second links non-zero. When the first and second links operate on a first frequency band, the first link obtains first channel state information that indicates a first channel measurement of a first set of channels observed from the second link to the first link. Based on the first channel state information, the first link determines a spatial mapping matrix that facilitates null steering of a signal transmission from the first link in a direction of the second link. The first link transmits to a remote device, a wireless signal on the first frequency band based on the spatial mapping matrix.

Abstract: Systems, methods, and apparatus for beam steering and switching are disclosed. In one or more examples, a method for operating a communication system comprises switching, at least one switch in a rearrangeable switch network, to control input levels to power amplifiers in a power distribution network. The method further comprises outputting, by the power amplifiers in the power distribution network, power to a plurality of antenna elements. Further, the method comprises steering and distributing power, by the antenna elements, in beams associated with each of the antenna elements according to a level of the power in each of the antenna elements.

Abstract: Technologies directed to using selective true-time delay for energy efficient beam squint mitigation in phased array antennas in communication systems are described. One communication system includes a first register to store a first value indicative of a mode of operation of the communication system and a second register to store a value corresponding to a first time duration. The communication system includes antenna elements, digital beamforming (DBF) devices, phase shifters, and delay circuitry. In a first mode, the delay circuitry does not delay a first signal and, in a second mode, the delay circuitry delays a second signal.

Abstract: A radar apparatus includes an antenna composed of an end-fire array antenna and including a plurality of antenna elements; and a circuit board in which the plurality of antenna elements is disposed side by side in a first direction. At least one of the plurality of antenna elements is parallel to a substrate surface of the circuit board. A directivity of at least one of the plurality of antenna elements is set to a third direction tilted with respect to the first direction and a second direction orthogonal to the first direction.

Abstract: In some embodiments, a method for mitigating interference in a channel having multiple users can include: determining a starting angle based on a direction of a signal of interest (SOI); iteratively steering a beam away from the starting angle in opposite directions and calculating a grade of the beam; choosing the beam at a current angle as a receive beam based on the beam grade; receiving a signal using the receive beam; and decoding the SOI from one or more interfering signals using successive interference cancellation multi-user detection (SIC MUD) on the received signal.

Abstract: Methods, systems, and devices for wireless communications are described. Communications by wireless devices may be modified when beam pair links (BPLs) experience decreased link quality. For example, a controlling wireless device may communicate with a secondary wireless device using a set of BPLs. The controlling and secondary wireless device may each cycle through the set of BPLs at respective times of a communication time period. Upon detecting one or more BPLs having a decreased link quality during a portion of the communication time period, the controlling wireless device may transmit a configuration modifying the communications. For instance, the modified communications may include replacing the one or more BPLs with different BPLs having a relatively higher link quality. In other cases, the modified communications may include using repeated transmissions during the portion of the communication time period or excluding the BPLs experiencing decreased link quality from the communication time period.

Abstract: A radio frequency (RF) beam transmission component having optical inputs and electrical outputs may include a wavelength selective switch (WSS) that has a plurality of optical WSS outputs. Each optical WSS output may be configured to transmit one or more wavelengths of the incoming optical signals. The RF beam transmission component may include a plurality of photodetectors (PD), each photodetector having an optical PD input coupled to one or more of said plurality of optical WSS outputs and a corresponding electrical output of a plurality of PD electrical outputs. The RF beam transmission component may further include a lens that has a plurality of electrical inputs and each electrical input may be electrically coupled to at least one of the plurality of electrical PD outputs. The lens may further have a plurality of electrical lens output ports.

Abstract: A relay station includes a beam formation unit capable of emitting multiple beams to multiple respective emission areas. The beam formation unit forms clusters each from two or more of the emission areas, and emits the beams based on assignment information indicating which slot is assigned to which of the emission areas on a per cluster basis. One emission area belongs to multiple clusters.

Abstract: Intelligent network probe placement optimization (e.g., using a computerized tool) is enabled. A method can comprise determining, from an inventory database, physical interfaces and service paths for data traffic to be monitored, according to a two-way active management protocol, with respect to network interfaces between cloud compute elements in a leaf-spine cloud fabric and radio access network equipment, based on the cloud compute elements, determining directed acyclic graph information representative of a directed acyclic graph of connections between the cloud compute elements and other cloud compute elements in the leaf-spine cloud fabric other than the cloud compute elements, and based on the directed acyclic graph information, determining a number and a distribution of probes to be employed at at least some of the physical interfaces and the service paths to monitor a parameter of the data traffic according to the two-way active management protocol.

Abstract: Systems and methods to control a radar system to perform cross-traffic management in a vehicle with a trailer involve determining a location of the trailer behind the vehicle, and adjusting an initial field of view of the radar system to a modified field of view that excludes the location of the trailer. One or more other vehicles are detected with the radar system having the modified field of view. A cross-traffic alert is implemented based on the detecting the one or more other vehicles.

Abstract: 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.

Abstract: Phased array antenna systems and methods for operating phased array antenna systems to efficiently generate multiple beams from a single phased array aperture are disclosed. Elements included in a phased array antenna are randomly assigned to generate one of first or second beams. A phase index for the first set of elements is iterated n times, and a total difference in phase amounts for neighboring elements belonging to different ones of the first and second sets is calculated for each of the n iterations. The phase index resulting in the smallest calculated difference is applied to generate the first beam. The first and second beams are generated from the single phased array aperture simultaneously.

Abstract: The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as long term evolution (LTE). According to various embodiments, an antenna apparatus may include: an array antenna including a sub-array, a power divider, and a reconfigurable phase shifter circuit, the reconfigurable phase shifter circuit may be configured to provide a first phase shift value based on a switch in a first state, and provide a second phase shift value different from the first phase shift value based on the switch in a second state.

Abstract: Wi-Fi communication is further secured by perturbation of a spatial mapping matrix. In an embodiment channel state information is obtained from a receiving device in a wireless network through the wireless network. A first set of beam steering vectors is derived based on the channel state information to direct a radio signal to the receiving device. A second set of beam steering vectors is derived based on the channel state information to direct a radio signal other than to the receiving device. A perturbation matrix is generated. A spatial mapping matrix is formed by combining the first and the second set of beam steering vectors with a perturbation matrix. Data symbols to be transmitted are pre-coded to the receiving device using the spatial mapping matrix and transmitted through the wireless network to the receiving device.

Abstract: Solutions to determine how to form beams when co-operating multiple-input multiple-output antenna panels are used are disclosed. Beams are formed according to sets of beamforming weights corresponding to minimized total transmit power from an antenna array of interest to served terminal devices. Optimization to minimize total transmit power subject to a predefined constraint on a minimum allowable expected value of signal-to-interference-plus-noise ratio, SINR, is performed. In the optimization expected values of SINR for a terminal device are calculated based on based on the sets of beamforming weights for at least the served terminal devices, and weighted second order statistics, wherein a weighting factor for second order statistics between the served terminal devices and the antenna array is one and weighting factors for the other second order statistics less than one. The second order statistics are included in maintained channel state information.

Abstract: This disclosure relates to an antenna array circuitry for analog beamforming, the antenna array circuitry comprising: a plurality of antenna elements, wherein each antenna element is configured to receive a respective analog signal (r(1,t), r(2,t), r(N,t)), wherein the plurality of antenna elements is adjustable based on a code-word, wherein the code-word comprises respective phase configurations (?p(1), ?p(2), ?p(N)) of the plurality of antenna elements, wherein the code-word is based on a superposition of a predetermined set of basic code-words, wherein each basic code-word associates with a corresponding sub-beam, wherein a main radiation lobe of the corresponding sub-beam points in a predefined spatial direction.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station (BS) may determine, for a user equipment (UE) operating in a mobility state, route information. The BS may transmit, to the UE, information identifying a set of beams based at least in part on the route information. The UE may perform a set of neighbor cell measurements, in connection with movement along the predicted route, using the set of beams. Numerous other aspects are provided.

Abstract: A switching device for a radar target emulator is provided comprising: at least one first switch arrangement and a second switch arrangement, each having a branching device designed to receive a first input signal and diverge it into a branch signal and a first output signal, a switch adapted to transmit the branch signal in a first switching state within the switch arrangement and to not transmit in a second switching state, and adding means designed to emit the signal transmitted in the first switching state of the switch, at least as components of a second output signal. The first switching arrangement and the second switching arrangement are interconnected in such a way that a first input signal of the second switching arrangement comprises a first output signal of the first switching arrangement, or a second input signal of the second switching arrangement comprises a second output of the first switching arrangement.

Abstract: A PDMA terminal (1000) establishes communication by forming a plurality of spatial paths to another single radio apparatus. A plurality of antennas constituting an array antenna are divided into a plurality of subarrays corresponding to the plurality of spatial paths respectively. An adaptive array processing unit (USP) can perform an adaptive array processing for each of the plurality of subarrays. A memory (MMU) stores in advance information on the number of antennas associated with the number of spatial paths that can be formed by the array antenna. A control unit (CNP) controls a processing to transmit possible multiplicity information to another radio apparatus at a prescribed timing.

Abstract: A PDMA terminal establishes communication by forming a plurality of spatial paths to another single radio apparatus. A plurality of antennas constituting an array antenna are divided into a plurality of subarrays corresponding to the plurality of spatial paths respectively. An adaptive array processing unit can perform an adaptive array processing for each of the plurality of subarrays. A memory stores in advance information on the number of antennas associated with the number of spatial paths that can be formed by the array antenna. A control unit controls a processing to transmit possible multiplicity information to another radio apparatus at a prescribed timing.