GB2500927A - Antenna using fading conditions to control radiation beam adjustments - Google Patents

Abstract

An apparatus for, or a method of, controlling an antenna which comprises: receiving a radio signal via an antenna S110, detecting fading conditions associated with the received signal S120 and controlling an antenna radiation pattern in terms of the radiation beam width based on the detected fading conditions S130. The fading conditions may be line-of sight or scattering scenarios or at least one fadingrelated reception parameter, such as: SNR, SIR, SINR, UL/DL signal power or RSSI. The antenna control system may involve computer hardware, firmware and/or software which may involve look-up tables. Geographical, environmental and/or directional data may also be used in adjusting the radiation beam or pattern to obtain optimum operational communication characteristics.

Description

Antenna control

Technical Field

The present invention relates to antenna control, for example controlling an antenna radiation pattern in an antenna module. In particular, but not exclusively, the present invention relates to methods, apparatuses, computer software and computer program products for providing fading-based control of an antenna radiation pattern.

Background

Typically, omnidirectional antennas are mostly used in contemporary (cellular) communication systems, especially at mobile devices such as vehicles and terminal equipments. The use of such omnidirectional antennas can lead to situations where a connection to a base station (i.e. a downlink wireless link) or to another mobile device (i.e. a D2D wireless link) is dropped or at least degraded due to degrading radio propagation properties of a wireless path, for example when operating on cell edges, especially in rural areas.

In view thereof, it is beneficial to use directional antennas, particularly steerable antennas with variable antenna radiation pattern. The use of such (steerable) directional antennas can enable an improved directivity towards a communication counterpart such as a base station or another mobile device, thereby avoiding connection drop or connection degradation.

However, controlling the directivity of the antenna radiation pattern towards a communication counterpart may not be sufficient for achieving desirable reception or radio link perfoimance, for example in terms of reception sensitivity of a desired radio wave signal/s andibr reception data throughput and/or envelope correlation between MIMO reception signals in case of a MIMO antenna unit. Whilst this is generally the case for any mobile environment, corresponding problems in view of degraded reception or radio link performance are particularly challenging in environments, such as automotive environments, where a mobile device, such as a vehicle, where the antenna in question is moving reasonably fast in varying environments.

Thus, there is a desire to provide for control of an antenna radiation pattern which is capable of providing improved reception or radio link performance even for mobile devices moving in varying environments.

Summary

Various embodiments of the present invention aim at addressing at least part of the above issues and/or problems and drawbacks.

According to a first aspect of the present invention, there is provided a method of controlling an antenna radiation pattern in an antenna module, the method comprising: receiving at least one radio wave signal via an antenna unit; detecting fading conditions in relation to the received at least one radio wave signal; and controlling an antenna radiation pattern of the antenna unit in terms of antenna lobe width on the basis of the detected fading conditions.

According to a second aspect of the present invention, there is provided apparatus for use in controlling an antenna radiation pattern in an antenna module, the apparatus comprising a processing system adapted to cause the apparatus to: receive at least one radio wave signal via an antenna unit; detect fading conditions in relation to the received at least one radio wave signal; and control an antenna radiation pattern of the antenna unit in terms of antenna lobe width on the basis of the detected fading conditions.

According to a third aspect of the present invention, there is provided computer software adapted to perform a method of controlling an antenna radiation pattern in an antenna module according to the first aspect of the present invention.

According to a fourth aspect of the present invention, there is provided a computer program product comprising a non-transitory computer-readable storage medium having computer readable instructions stored thereon, the computer readable instructions being executable by a computerized device to cause the computerized device to perform a method of controlling an antenna radiation pattern in an antenna module according to the first aspect of the present invention.

According to embodiments of the present invention, there is provided a computer program product comprising a set of instructions (for example computer-executable computer program code) which, when executed on an apparatus or a computer of an apparatus (for example an apparatus according to the aforementioned apparatus-relatcd aspect of thc present invcntion), is ananged to cause the computer or apparatus to cany out the method according to the aforementioned method-related aspect of the present invention. Such computer program product may comprise or be embodied as a (tangible) computer-readable (storage) medium or the like on which the computer-executable computer program code is stored, and/or the program may be directly loadable into an internal memory of the computer or a processor thereof.

Advantageous further developments or modifications of the aforementioned aspects of the present invention are set out in the following.

By virtue of any one of the aforementioned aspects of the present invention, there is provided a control of an antenna radiation pattern, which is capable of providing for improved reception or radio link performance even for mobile devices moving in varying environments.

Thus, by way of embodiments of the present invention, enhancements and/or improvements are achieved by measures for realizing fading-based control of an antenna radiation pattern.

Brief Description of Drawings

For a more complete understanding of embodiments of the present invention, reference is now made to the following description taken in conjunction with the accompanying drawings in which: Figure 1 shows a flowchart of a first procedure according to embodiments of the present invention; Figure 2 shows a flowchart of a second procedure according to embodiments of the present invention; Figure 3 shows a flowchart of a third procedure according to embodiments of the present invention; Figure 4 shows an antenna diagram illustrating two antenna radiation patterns resulting from a control according to embodiments of the present invention; Figure 5 shows a schematic diagram of a first construction of an apparatus according to embodiments of the present invention; Figure 6 shows a schematic diagram of an operational example in the first construction of an apparatus according to embodiments of the present invention; Figure 7 shows a schcmatic diagram of a second construction of an apparatus according to embodiments of the present invention; Figure 8 shows a schematic diagram of a mobile device for which embodiments of the present invention arc applicable; and Figure 9 shows a functional block diagram of an apparatus according to embodiments of the present invention.

Detailed Description

Aspects of the present invention will be described herein below. More specifically, aspects of the present are described hereinafter with reference to particular non-limiting examples of the present invention. A person skilled in the art will appreciate that the invention is by no means limited to these examples, and may be more broadly applied.

It is to be noted that the following description of the present invention and its embodiments mainly refers to explanations being used as non-limiting examples for cxcmplif'ing purposes. As such, the description of embodiments given herein specifically refers to terminology which is related thereto. Such terminology is only used in the context of the presented non-limiting examples, and naturally does not limit the invention in any way.

In particular, the present invention and its embodiments may be applicable to any antenna in any use case scenario or operational scenario, for which directivity properties arc desirable, including application areas of mobile communications as well as radar, network measurements, network positioning measurements, satellite positioning and satellite communications, interference reduction, for example.

Antenna use case scenarios in the meaning of the present invention and its embodiments may appear in computers, PCs, communication devices with user interface(s), communication devices without user interfaces, vehicles, cars, relays, routers, base stations, satellites etc., when having capability for radio communication with a communication counterpart such as for example networks, ad hoc wireless networks, satellites, alternate terminals, any other communication equipment or the like.

Hereinafter, various embodiments and implementations of the present invcntion and its aspects or embodimcnts arc dcscribcd using scvcral altcmativcs. It is generally noted that, according to certain needs and constraints, all of the described alternatives may be provided alone or in any conceivable combination (also including combinations of individual fcaturcs of the various alternatives).

According to embodiments of the present invention, in general terms, there are provided measures for realizing fading-based control of an antenna radiation pattern.

More specifically, embodiments of the present invention provide for a technique for controlling an antenna radiation pattern (at least in terms of antenna lobe width), i.e. for controlling beamforming, wherein the antenna radiation pattern is adjusted or, stated in other words, the antenna beam is formed (at least in terms of antenna lobe width) according to fading conditions in reception of at least one radio wave signal.

By virtue of a fading-based control of an antenna radiation pattern according to embodiments of the present invention, the antenna radiation pattern can be varied to be as optimal as possible for maintaining acceptable reception or radio link performancc, for cxamplc in terms of reception scnsitivity of a dcsircd radio wavc sigilal and/or reception data throughput aildlor envelope correlation between MIMO reception signals in case of a MIMO antenna unit.

The fading-based control of an antenna radiation pattern (i.e. the fading-based beamforming technique) according to embodiments of the present invention relies on the following considerations.

Signa' propagation conditions on a radio link alter according to fading conditions prevailing between the transmitting and receiving counterparts. In radio reception, the fading conditions can he divided into line-of-sight (LOS) conditions and scattering (non-line-of-sight NLOS) conditions. In the time domain, LOS (radio reception) conditions alter slowly, because there is typically a direct link between the communication counterparts, such as liE/vehicle and base station or different UEs/vehicles. In contrast thereto, NLOS (radio reception) conditions alter rapidly due to multiple reflections, for example in urban canyons.

In this regard, it is challenging in terms of reception or radio link performance (in particular, reception data throughput), when reflections arrive at angles of (approximately) 360 dcgrccs around thc UE/vehiclc and/or thc rcccivcd powcr of desired signals is low (compared to undesired signals such as noise and/or interference). Operating on rich scattering environments, especially in urban canyons or similar environments, can lead to a situation whcrc maximum data throughput is not achieved in reception, such as for example MIMO reception, because data signals are not received with a sufficiently high SNR and/or decorrelation ofMIMO signals.

Further, it is challenging in terms of reception or radio link performance (in particular, reccption sensitivity), when the received power of desired signals is low (as compared to undesired signals such as noise and/or interference). In order to achieve good cell coverage or, more generally, communicable distance, the antenna lobe width is preferably narrow. Operating on cell edges, especially in suburban and rural areas or similar environments, can lead to a situation where the connection to a base station or another communication counterpart is dropped.

In view of the above, the fading-based control of an antenna radiation pattern according to embodiments of the present invention enables the antenna radiation pattern to be modified according to fading conditions. Further, the fading-based control of an antenna radiation pattern according to embodiments of the present invention enables the antenna radiation pattern to be modified to give the best directivity towards a communication counterpart. Thereby, improvements in reception or radio link performance, for example in terms of reception sensitivity of a desired radio wave signal and/or reception data throughput and/or envelope correlation between MIMO reception signals in case of a MIMO antenna unit, could be achieved. As used herein, reception data throughput may cover performance of the whole communication link including radio channel, antenna, RF and Modem BB processing.

In the following, embodiments of the present invention are described with reference to methods, procedures and functions, as well as with reference to structural arrangements and configurations.

Figure 1 shows a flowchart of a first procedure according to embodiments of the present invention.

As shown in Figure 1, a procedure according to embodiments of the present invention comprises an operation (SI 10) of receiving at least one radio wave signal via an antcnna unit, an opcration (S 120) of dctccting fading conditions in relation to the received at least one radio wave signal, and an operation (S 130) of controlling an antenna radiation pattern of the antenna unit in terms of antenna lobe width on the basis of thc detected fading conditions.

In communication scenarios with at least two radio wave signals, the signals may be at the same frequency band allocation, at the same frequency range (for example 1 GHz, 2 GHz, 2.6 GHz, 3.4 GHz) but from different frequency band allocations, or from differcnt frcqucncy rangcs. Furthcrmore, with at least two radio wave signals, there may be one or more communication counterparts by which the received radio wave signals have been transmitted, for example a single base station, more than one base station, at least one base station and at least one TIE or other mobilc dcvicc, and so on. A communication radio link with at Icast two radio wavc signals may for example be used for carrier aggregation in LTE-A or HSPA, for alternate radio access technologies (such as for example LTE and WiFi), or between different radio access technologies (such as for example LTE and WiFi). Further, cmbodiments of thc prcscnt invcntion arc applicable for both TDD and FDD radio communication systems.

According to embodiments of the present invention, the fading conditions in reception may comprise any information or parameter indicative of signal propagation conditions on a radio link bctwccn the antenna unit in question (which may be mounted/mountable at any mobile device, such as a TIE or a vehicle) and a communication counterpart (which may be another TIE or vehicle or any kind of communication system infrastructure such as a base station or access node). Such fading-related information or parameter may exemplarily rclatc to received signal power or dispersion thereof and/or signal delay or spread/dispersion thereof and/or signal direction or dispersion thereof (including both TX and/or RX signal direction), Doppler frequency or dispersion thereof polarization or dispersion thereof small-scale fading or dispersion thereof, etc. In embodiments, the antenna radiation pattern is controllable (at least) in terms of antenna lobe width according to fading conditions in reception. Controlling antenna lobe width is achievable with information about current fading conditions, which is available for example from a modem receiver and/or a processor. Namely, thc rclcvant information about currcnt fading conditions may bc cxtractcd from thc received radio wave signal or signals by algorithms in/at a modem receiver and/or a processor. Thus, extracted information can then be used to control an antenna radiation pattcrn in terms of (at least) antcnna lobe width according to prevailing fading conditions.

As indicated in Figure 1 by way of a dashed line box, in a procedure according to embodiments of the present invention, the detection operation may comprise an opcration (S120a) of dctcrmining a prcdcfincd fading sccnario, whcrein thc control operation may comprise adjusting the antenna lobe width in accordance with the determined fading scenario. In this regard, the predefined fading scenario may comprise a line-of-sight (LOS) scenario and at least one scattering (NLOS) scenario.

In thc opcration S 120a, thc dctcctcd fading conditions may bc cvaluatcd so as to distinguish between LOS and NLOS fading scenarios. When a LOS fading scenario is determined, antenna control in operation S130 may be such that the antenna radiation pattern is controlled in such a manner that the antenna lobe width is adjusted to form a narrow beam width (towards an incoming signal dircction), for example between 0 and 90 degrees. When a NLOS fading scenario is determined, antenna control in operation S130 may be such that the antenna radiation pattern is controlled in such a manner that the antenna lobe width is adjusted to form a wide bcam width (towards an incoming signal dircction), for cxample between 180 and 360 degrees. The difference between the two cases of antenna control in LOS and NLOS cases is exemplarily illustrated in Figure 4 which shows an antenna diagram illustrating two antenna radiation patterns resulting from a control according to embodiments of the present invention.

As indicated in Figure 1 by way of a dashed line box, in a procedure according to embodiments of the present invention, the detection operation may comprise an operation (51 20b) of measuring at least one fading-related reception parameter, wherein the control operation may comprise adjusting the antenna lobe width in accordance with the measured at least one fading-related reception parameter. In this regard, the at least one fading-related reception parameter may comprise at least one of any conceivable parameters indicative of signal propagation conditions on a radio link between the antenna unit and a communication counterpart and/or at least one antcnna parametcr of thc antenna unit. For cxamplc, thc at least onc fading-rclated reception parameter may comprise a delay spread of the received at least one radio wave signal and/or a least one of a parameter indicative of a received power of the received at least one radio wave signal, and/or at least one antenna parameter of the antenna unit.

In the operation S120b, the antenna control may correlate with individual values of the measured fading-related reception parameter or parameters, or may correlate with predefined ranges/intervals thereof For example, when the delay spread of the received at least one radio wave signal is measured as the fading-related reception parameter, the antenna control may be adapted on a value basis or a range/interval basis of the thus measured delay spread. When a medium delay spread (of scattered signals) is measured, antenna control in operation Sl30 may be such that the antenna radiation pattem is controlled in such a manner that the antenna lobe width is adjusted to form a medium beam width (towards an incoming signal direction), for example between 80 and 180 degrees. When a large delay spread (of scattered signals) is measured, antenna control in operation S130 may be such that the antenna radiation pattern is controlled in such a manner that the antenna lobe width is adjusted to form a wide beam width (towards an incoming signal direction), for example between 180 and 360 degrees.

According to embodiments of the present invention, the detection operation may comprise one or both of the operations S120a and S120b set out above.

When both operations S120a and S120b are applied for detection of fading conditions according to embodiments of the present invention, the fading-related reception parameter may be associated with the determined fading scenario.

For example, when a LOS fading scenario is determined, no measurement of a fading-related reception parameter may be performed, and the antenna radiation pattern may be controlled on the basis of the determined fading scenario only, for example by adjusting the antenna lobe width to form a beam width of (around) 45 degrees. When a NLOS fading scenario is determined, measurement of a delay spread as a fading-related reception parameter may be performed, and the antenna radiation pattern may be controlled on the basis of the combination of the determined fading scenario and the measured delay spread, for example by adjusting the antenna lobc width to form a bcam width of betwccn 90 and 135 dcgrccs or bctwecn 135 and degrees in the case of a medium delay spread of scattered signals, and by adjusting the antenna lobe width to form a beam width of between 180 and 360 degrees or (approximately) 360 degrees in the ease of a large delay spread of scattered signals.

In both alternatives, i.e. when operation S120b is implemented with or without combination with operation S120a, the measured fading-related reception parameter may be any parameter indicative of fading-related reception characteristics at the antenna unit in question. In addition or as an alternative to the aforementioned delay spread, a parameter indicative of a received power of the received at least one radio wave signal may be used. Such a parameter may for example comprise one or more of SNR, SIR, S1INR, UL/DL signal power, RSSI, and the like. Further, in addition or as an alternative to the aforementioned delay spread, at least one antenna parameter of the antenna unit in question may be used. Such a parameter may for example comprise a number of antenna elements (radiators), an arrangement of antenna elements (radiators) in an antenna array, current weights of antenna elements (radiators), and the like.

Figure 2 shows a flowchart of a second procedure according to embodiments of the present invention.

The operations S210 and S220 (potentially including S220a and/or S220b) of Figure 2 correspond to operations 5110 and S120 (potentially including 5120a and/or SI 20b) of Figure 1. Accordingly, no detailed description thereof is repeated hereinafter, but reference is made to thc corresponding description in conjunction with Figure 1 above.

As shown in Figure 2, a procedure according to embodiments of the present invention comprises, in addition to operations S210 and S220 (potentially including S220a and/or S220b), an operation (S230) of detecting an incoming signal direction in relation to the receipt of at least one radio wave signal. The control operation (S240) comprises controlling the antenna radiation pattern of the antenna unit in terms of antenna lobe direction on the basis of the detected incoming signal direction, in addition to controlling an antenna radiation pattern of the antenna unit in terms of antenna lobe width on the basis of the detected fading conditions (as in operation Sl3OofFigurcl).

It is to be noted that the sequence of operation 5220 and 5230 illustrated in Figure 2 is an example only. Alternatively, these operations may be performed in a different sequence or in parallel, i.e. (quasi) at the same time.

Figure 3 shows a flowchart of a third procedure according to embodiments of the present invention.

Basically, the operations S3 10, S320 (potentially including S320a and/or S320b) and S330 of Figure 3 correspond to operations S210, S220 (potentially including S220a and/or S220b) and S230 of Figure 2. Accordingly, no detailed description thereof is repeated hereinafter, but reference is made to the corresponding description in conjunction with Figures 1 and 2 above.

As shown in Figure 3, a procedure according to cmbodiments of the present invention comprises, in addition to operations S310, S320 (potentially including S220a and/or S220b) and S330, an operation (S340) of retrieving auxiliary data relating to at least one of geographical and infrastructural environment information.

The control operation (S350) comprises controlling the antenna radiation pattern of the antenna unit in terms of antenna lobe width and/or antenna lobe direction on the basis of the retrieved auxiliary data, in addition to the basis of the detected fading conditions and/or the detected incoming signal direction (as in operation S130 of Figure 1 or operation S240 of Figure 2).

The auxiliary data relating to at least one of geographical and infrastructural environment information may for example comprise information regarding the geographical position of base stations of a cellular communication system, positions where mobile devices (such as the mobile device with the antenna unit in question and/or a mobile device representing a communication counterpart) may or are likely to be positioned. Such information may be retrieved form a local storage or via communication with a communication counterpart. For example, in a use case of D2D communication between two vehicles representing mobile devices, roadmap and!or road design data (potentially including characteristics of straight roads, curves, clothoids, or the like) may be used as auxiliary data, which may for example be retrieved from a local navigation device or a cloud-based navigation system.

It is to be noted that the sequence of operations S320 to S340 illustrated in Figurc 3 is an cxamplc only. Alternatively, thesc operations may be pcrformcd in a different sequence or (at least partly) in parallel, i.e. (quasi) at the same time.

According to embodiments of the present invention, a hysteresis approach may be adoptcd in controlling the antcnna radiation pattcrn in anyone of operations S 130, S240 and S350, respectively.

Figure 4 shows an antenna diagram illustrating two antenna radiation patterns resulting from a control according to embodiments of the present invention. The thus illustrated antenna radiation patterns may result from any one of the procedures according to Figures 1 to 3, as explained above.

As shown in Figure 4, an anteniia radiation pattern of a LOS case may exhibit a narrow antenna lobe (or beam) width and may be directed towards the direction of the transmitter of the received radio waves sial or signals, which is assumed to be 900 herein. As shown in Figure 4, an antenna radiation pattern of a NLOS case may exhibit a circular antenna characteristic, i.e. an antenna lobe (or beam) width of 360 degrees, and may thus not exhibit any directivity, which may be the case when rcflections of scattcrcd signals arrive in anglcs of (approximatcly) 360 degrccs.

As described above, various kinds of information may be used for a processor or controller or the like to make a decision about executing a suitable antenna radiation pattern control (i.e. antenna direction and/or beam width). The anteima radiation pattern control may be suitable for improving data throughput in good SNR'SIR'SlNR conditions and/or for improving cell coverage (or, more generally, communicable distance) in weak signal conditions (for examp'e at a ecH edge).

According to needs and/or preferences, radiation pattern controls may be generated and conveyed to thc antenna unit in question.

The fading conditions (i.e. the radio link parameters) may be continuously followed, and corresponding antenna beam steering controls may be proyides (for example based on calculations and/or table lookups) accordingly. Thereby, improved communication quality and/or increased bitrates may be achieved due to the advanced beam steering technique according to embodiments of the present invention.

According to embodiments of the present invention, any steerable antenna arrangement of the antenna unit may be controlled by the above procedures.

Accordingly, thc fading-based control tcchniquc according to cmbodimcnts of thc present invention is independent of the configuration of the antenna unit, as long as its antenna radiation pattern is controllable, and is applicable to any antenna arrangement including at least onc antenna (i.c. antenna element or radiator) or a onc-or two-dimensional antenna array (having a plurality of antennas or antenna elements or radiators).

Generally speaking, for controlling the antenna radiation pattern, the antenna control according to cmbodimcnts of thc prcscnt invcntion may affect thc dcsign and!or weights and/or signal phases of antennas in an antenna array or the design and/or size of the effective electrically conductive area in an antenna unit with at least one antenna (i.e. antenna element or radiator).

Figure 5 shows a schcmatic diagram of a first construction of an apparatus according to embodiments of the present invention.

As shown in Figure 5, an apparatus 10, i.e. an antenna arrangement, controllable according to embodiments of the present invention comprises an antenna element ANT, an electrically conductive ground plane OND which is divided into a plurality of electrically isolated parts, and a switching unit SW configured to electrically connect at least one of the plurality of parts of the ground plane GND with a ground potential of the apparatus 10.

The antenna element ANT as such is electrically isolated from the ground plane GND, for example by way of an air gap or an isolator there-between. The parts of the ground plane may also be divided for example by way of an air gap or an isolator there-between, respectively. The antenna element may be any antenna clement capable of transmitting andior receiving electromagnetic radiation. Further, there may also be more than one antenna element. Furthermore, the antenna element may be any one of a system main antenna, a diversity antenna, a MIMO antenna, an alternate antenna or any other special purpose antenna for example sharing functionality between wireless communication systems. For example, the antenna element ANT may be a monopole antenna element, a dipole antenna element, and so on. Also, the antenna element ANT may have any resonant frequency property, for example may be a quarter-wave antenna element, a half-wave antenna element, and so on.

In the exemplary configuration of Figure 5, the ground plane has a circular/annular shape as an example of a curved basic shape, and it is divided into four parts having a sector shape, respectively. It is noted that the antenna arrangement is not limited to such an example configuration, but different shapes of the ground plane and different numbers of divided parts are equally applicable. For example, the ground plane may have an ellipsoidal shape (as an example of a curved basic shape) with sector-shaped parts, or the ground plane may have a rectangular or polygonal (as an example of a straight-line basic shape) shape with trapezoid-shaped parts.

Generally speaking, the ground plane may have any conceivable shape, such as any curved basic shape, in which case the divided parts thereof have a sector-like basic shape, or any straight-lined basic shape, in which case the divided parts thereof have a trapezoid-like basic shape. Also, the number of divided parts may adopt any natural number equal to or larger than two.

The ground plane (or parts thereof) may have any conceivable design or form.

For example, the ground plane may comprise a two-dimensional design/form (i.e. a one-dimensional profile shape in a side view) or a three-dimensional design/form (i.e. a two-dimensional profile shape in a side view). When being three-dimensionally designed/formed, the ground plane may for example be convex, concave, or may have any other (for example combined) appearance. A ground plane with a three-dimensional design is exemplarily depicted in Figure 4.

Figure 6 shows a schematic diagram of an operational example in the construction of an apparatus according to embodiments of the present invention.

As indicated above, each of the parts (for example sectors) can be switched on and off by the switching unit, respectively. Accordingly, one or more of the parts (for example sectors) can be connected with the ground potential of the apparatus at a time, thereby varying the design and/or size of the effective area of the ground plane and, thus, the antenna radiation pattern. Furthermore, one or more of the parts (for example sectors) can be connected with the alternate sectors at a time, thereby varying the effective area of the ground plane and, thus, the antenna radiation pattern.

In the example operational situation of Figure 6, part (for example sector) #2 of the ground plane GND is electrically connected with the part representing the ground potcntial of the apparatus by way of a corresponding switch on the right side thereoL while the remaining three parts (for example sectors) #1, #3 and #4 of the ground plane GND are unconnected due to an open state of the respective switches.

Thereby, an antcnna radiation pattcrn as indicatcd in Figure 6 would result, for example a transmit emission direction in the case of a transmit antenna or transmit antenna usage of a transmit/receive/MIMO/diversity antenna. Similarly, in the case of a receive antenna or receive antenna usage of a transmit/receive/MIMO/diversity antenna, the resulting antenna radiation pattern as indicated in Figure 6 would represent a receive sensitivity direction.

Figure 7 shows a schematic diagram of a second construction of an apparatus according to embodiments of the present invention.

As shown in Figure 7, an apparatus 10, ic. an antenna arrangement, controllable according to embodiments of the present invention comprises an antenna element ANT, an electrically conductive ground plane GND which is diyided into a plurality of electrically isolated parts, two alternate ground planes which are elcctrically conductive, and a switching unit SW conflgurcd to electrically conncct at least one of the plurality of parts of the ground plane GND with a ground potential of the apparatus 10. Further, the apparatus comprises additional switches between the electrically isolated parts of the ground plane and between the ground plane (i.e. isolated parts thereof) and the alternate ground planes, respectively. The additional switches function to (frirther) shape the antenna radiation pattern of the antenna arrangement. Accordingly, the additional switches are controllable (by a controller) to this end. The additional switches may form part of the switching unit SW, and may thus be controlled in a coordinated manncr.

It is noted that the configuration according to Figure 7 is for illustrative purposes by way of example only. The additional switches may comprise only the additional switches between the isolated parts of the ground plane, only the additional switchcs between the ground plane and thc (one or more) altcrnatc ground planes, or both (as illustrated in Figure 7). The number of additional switches at the various possible positions is not limited in any way. Also, as illustrated in Figure 7, the number of additional switches between isolated parts of the ground plane and/or between any isolated part of the ground plane and an alternate ground plane are not necessarily equal to each other. Further, there does not have to be an additional switch between every pair of adjacent isolated parts of the ground plane and/or an alternate ground plane. The respective additional switches between isolated parts of the ground plane may be disposed at different distances from the center portion and/or the antenna element, respectively.

Further, there may be any conceivable number of alternate ground planes, such as one or more (where two alternate ground planes are illustrated in Figure 7), and the shape and design/form of the alternate ground planes is not limited in any way but may adopt any shape and/or design/form as described above for the ground plane GND.

As illustrated in Figure 7, the switching unit SW (i.e. the additional switches) may connect an electrically conductive ground plane GND (or part thereof) to one or more electrically conductive ground plane(s) GND (or parts thereof). One ground plane may have one or more SW with corresponding controls. As illustrated in Figure 7, connected electrically conductive ground plane(s) GND may be adjacent or any other alternate electrically conductive ground plane(s) GND designed to be connected together to shape the antenna (radiation) pattern.

As illustrated in Figure 7, positions of switches may vary around the ground plane GND, which may for example be according to design implementation, in order to shape the antenna (radiation) pattern.

Although not illustrated, ground planes (or parts thereof) may overlap each other, and/or ground planes (or parts thereof) may be extended by steps around the center portion and/or the antenna clement, and/or ground planes (or parts thereof) may be extended by steps with distance from the center portion and/or the antenna element.

The switching unit and/or the switch/switches may be realized by any conceivable element with electrical (controllable) switching functionality, such as for example diodes, transistors, relays, or the like.

The switching functionalities may for example be embedded to a printed wiring board (PWB), LTCC (Low temperature co-fired ceramic) or the like with control circuitry with routings. Routing length or routing loops on the PWB or the 111cc may be used to adjust antenna radiation pattern(s). The PWB or the 111cc may have electrical components at single or both sides or embedded to layers of the PWB.

In some implementations, the PWB may have integrated functionalities of one or more of antenna switches, RE path filtering, transceiver, modem, application processor, memory, user interface, positioning receiver, for example.

According to embodiments of the present invention, the antenna radiation pattern of an antenna unit with an antenna arrangement as illustrated in any one Figures 5 to 7 is controllable by altering effective (i.e. switched) GND sector elements andior planes. Namely, the antenna radiation pattern maybe varied in that each of the GND sectors and/or planes (of an arbitrary number) can be switched on and off by a switching element. Thereby, (switching-based) modifications in the orientation of effective GND sectors of the antenna ground plane or planes can be utilized to form a directive antenna beam to different directions. Further, (switching-based) modifications in the number of effective GND sectors of the antenna ground plane or planes can be utilized to form a directive antenna beam with different beam/lobe widths.

Figure 8 shows a schematic diagram of an exemplary mobile device for which embodiments of the present invention are applicable.

As shown in Figure 8, an apparatus operable for fading-based control according to embodiments of the present invention, for example the apparatus according to Figure 9, may be mounted or mountable on any mobile device, such as for example a vehicle. In the exemplary illustration of Figure 8, the antenna unit may be mounted or mountable for example on the roof of a car. Practically, the apparatus and/or the antenna unit may be placed at any place in/at a ear or other vehicle with suitable industrial design, or the apparatus may be integrated into another assembly part or functional module/part of car or other vehicle.

Namely, an antenna arrangement and/or an antenna module (for example including a modem) according to embodiments of the present invention may be installed in the roof of a car. A USB cable or the like may for example provide a data connection (and power) for a modem and a radio frequency operation of the antenna element.

As indicated in Figure 8, the antenna unit may be controlled to exhibit different antenna radiation patterns, and a resulting antenna radiation pattern is typically longcr (i.c. provides for a longer communication distance) the narrower its antenna lobe yidth is.

Although not illustrated, an apparatus operable for fading-based control according to embodiments of the present invention may be mounted or mountable on any conceivable mobile device, including a communication terminal equipment or user equipment of any conceivable cellular/radar/satellite communication system or any other positioning/measuring system. For example, the apparatus may be mounted or mountable at a terminal device of a 2G/3G/4G communication system, a WLAN/WiFi communication system, a Bluetooth communication system, as a receive/transmit/receive and transmit/diversity/MIMO antenna, or the like.

As indicated above, depending on the type of wireless communication link to be served/realized by way of the antenna unit in question, the communication counterpart may be a mobile device or satellite or a radio communication system infrastructure (including relays, routers, etc). Referring to the configuration of Figure 8, a car-to-car communication may be served/realized when the communication counterpart is also a ear.

While embodiments of the present invention are applicable for any mobile device in any conceivable use case, application in an automotive environment may be particularly effective. This is because a vehicle or car is typically moving reasonably fast in varying environments. Accordingly applying embodiments of the present invention in an automotive environment is effective for achieving desirable reception or radio link performance, for example in terms of reception sensitivity of a desired radio wave signal and/or reception data throughput even for mobile devices moving in varying environments.

Figure 9 shows a functional block diagram of an apparatus according to embodiments of the present invention.

As shown in Figure 9, an apparatus (or electronic device) according to embodiments of the present invention may comprise an antenna unit 10 and a processing unit 20, wherein the processing unit 20 may comprise a modem/transceiver 20a and a controller 20b.

The antenna unit 10 may for example comprise one as exemplified with reference to Figures 5 to 7. The antenna unit is for example applicable for use as or in an antcnna moduk or an antcnna moduic with clectronics or a vchiclc factory assembly part, or a vehicle after sale assembly part, or a vehicle service upgrade part, or the like according to embodiments of the present invention.

Controlling unit 20b may be configured to perform fading-based control according to embodiments of the present invention, as described above, i.e. the procedure as exemplified with reference to Figures 1 to 3. Component 20a may be realized by a feeding/communication unit which may comprise at least one of a modem and a transceiver unit (in the ease of a transmit/receive antenna or corresponding usage). Component 20b may be realized by a processing system or processor or, as exemplarily illustrated, by an arrangement of a processor 30, a memory 40 and an interface 50, which are connected by a link or bus 60. Memory 40 may store respective programs assumed to include program instructions or computer program code that, when executed by the processor 30, enables the respective electronic device or apparatus to operate in accordance with the embodiments of the present invention. For example, memory 40 may store a computer-readable implementation of a control procedure as illustrated in any of Figures 1 to 3. Further, memory 40 may store one or more look-up tables for implementing the control of the antenna radiation pattern with respect to the one or more parameters used in this regard, such as look-up tables for different combinations of conceivable parameters such as fading scenario and/or fading-related reception parameter/parameters and/or auxiliary data.

According to embodiments of the present invention, all (or some) eireuitries required for the aforementioned flinctionalities may be embedded in the same circuitry, a system in package, a system on chip, a module, a LTCC (Low temperature co-fired ceramic) or the like, as indicated by the dashed line in Figure 9.

Irrespective of the illustration of Figure 9, an apparatus (or electronic device) according to embodiments of the present invention may comprise processing unit 20 only, which is connectable to the antenna unit 10, or an apparatus (or electronic device) according to embodiments of the present invention may comprise controlling unit 20b only, which is connectable to antenna unit 10 (via modem/transceiver 20a or not).

According to embodiments of the present invention, the control procedure as illustrated in any of Figurcs 1 to 3 may bc cxccutcd in/by controlling unit 20 (i.c. in cooperation between modem/transceiver 20a and controller 20b) or in/by controller 20b as such.

Apparatus according to embodiments of the present invention (irrespective of its realization with respect to the illustration of Figure 9) is configured to receive at least one radio wave signal via an antenna unit, to detect fading conditions in relation to the receipt of the at least one radio wave signal, and to control an antenna radiation pattern of the antenna unit in terms of antenna lobe width on the basis of the detected fading conditions. For example, depending on the realization with respect to the illustration of Figure 9, the fading conditions may be detected, for example corresponding information may be extracted, either at'by modem/transceiver 20a or controller 20b.

In various variants, the apparatus according to embodiments of the present invention (irrespective of its realization with respect to the illustration of Figure 9) may be configured to determine a predefined fading scenario and to adjust the antenna lobe width in accordance with the determined fading scenario, and/or to measure at least one fading-related reception parameter and to adjust the antenna lobe width in accordance with the measured at least one fading-related reception parameter, and/or to detect an incoming signal direction in relation to receipt of the at least one radio wave signal and to control the antenna radiation pattern of the antenna unit in terms of antenna lobe direction on the basis of the detected incoming signal direction, and/or to retrieve auxiliary data relating to at least one of geographical and infrastructural environment information and to control the antenna radiation pattern of the antenna unit in terms of at least one of antenna lobe width and antenna lobe direction on the basis of the retrieved auxiliary data.

As outlined above, the communication counterpart, to which the apparatus is to transmit and/or from which the apparatus is to receive, may be any entity operable to communicate with the apparatus. For example, the conimunication counterpart may be a base station or any other access point of a communication system and a mobile device (when the wireless path corresponds to a downlink wireless link) or any mobile device (when the wireless path corresponds to a D2D, V21, V2V, V2R wireless link). In embodiments of the present invention, the apparatus maybe able to define its own location in gcographical area and/or the communication counterpart's location, and the apparatus may be capable of defining a parameter set in order to aim/direct an antenna beam towards the communication counterpart. The apparatus may definc its own location, for exampic, with satcllitc positioning mcthods, nctwork positioning methods, or with special purpose sensors, such as a gyroscope. The communication counterpart's location may be obtained from a network server on the basis of an identifier, a communication with the communication counterpart, from the apparatus memory on the basis of an identifier of the communication counterpart or the like.

In embodiments of the present invention, the apparatus memory (such as memory 40 ill Figure 9) may maintain and update a (preferable or optimal) parameter set. Such (prcfcrable or optimal) parameter set may for exampic relate to road sections or the like. Typically, a vehicle with a driver follows the same route between home-work -home -mall -hobbies -home the like, and the apparatus may pick a preferable or optimal parameter set from the memory for each road section (based on prc-storcd routc information). Thc apparatus may Icarn poor radio pcrformancc road sections and may with trial-and-error ipdate the database for a better parameter set for example for tunnels etc. In general terms, the respective devices/apparatuses (and/or parts thereof) may represent means for performing respective operations and/or exhibiting respective functionalities, and/or the respective devices (and!or parts thereof) may have functions for performing respective operations and/or exhibiting respective functionalities.

It is noted that embodiments of the present inyention are not limited to such configuration as depicted in Figure 9, but any configuration capablc of rcalizing the structural and/or functional features described herein is equally applicable.

It is further noted that Figures to 7 and 9 represent simplified schematic/block diagrams. In Figure 9, the solid line blocks are configured to perform respective operations as dcscribed hcrein. The entirety of solid linc blocks arc configurcd to perform the methods and operations as described herein, respectively. With respect to Figure 9, it is to be noted that the individual blocks are meant to illustrate respective functional blocks implementing a respective function, process or procedure, respectively. Such functional blocks are implementation-independent, i.e. may be implcmcntcd by means of any kind of hardware or softwarc, rcspcctivcly. The arrows and lines interconnecting individual blocks are meant to illustrate an operational coupling there-between, which may be a physical and/or logical coupling, which on thc one hand is implemcntation-indcpcndent (for cxamplc wired or wircless) and on the other hand may also comprise an arbitrary number of intermediary functional entities (not shown). The direction of an arrow is illustrates the direction in which certain operations are performed and/or the direction in which certain data is transferred.

Further, in Figures 5 to 7 and 9, only those structural/frmnctional blocks are illustrated, which relate to any one of the (specific) methods, procedures and functions according to embodiments of the present invention. A skilled person will acknowledge the presence of any othcr conventional ftrnctional blocks required for an operation of respective structural arrangements, such as for example a power supply, a central processing unit, respectiye memories or the 111cc. Amongst others, memories are provided for storing programs or program instructions for controlling the individual thnctional entities to operate as described hcrcin.

When in the above description it is stated that the processor (or some other means such as a processing system) is configured to perform some function, this is to be construed to be equivalent to a description stating that at least one processor, potentially in cooperation with computer program code stored in the memory of the respective apparatus, is configured to cause the apparatus to perform at least the thus mentioned function. Also, such function is to be construed to be equiyaiendy implementable by specifically configured means for performing the respective function (i.e. the cxprcssion "proccssor configured to [cause the apparatus to] perform xxx-ing" is construed to be equivalent to an expression such as "means for xxx-ing").

In general, it is to be noted that respective functional blocks or elements according to above-described aspects can be implemented by any known means, either in hardware and/or softwarc/flrmware, rcspectively, if it is only adaptcd to perform the described frmnctions of the respective parts. The mentioned method steps can be realized in individual functional blocks or by individual devices, or one or more of the method steps can be realized in a single functional block or by a single device.

Gcncrally, any structural mcans such as a proccssing system, proccssor or other circuitry may refer to one or more of the following: (a) hardware-only circuit implementations (such as implementations in only analog and/or digital circuitry) and (b) combinations of circuits and softwarc (and/or firmware), such as (as applicable): (i) a combination of processor(s) or (ii) portions of processor(s)/software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) circuits, such as a microprocessor(s) or a portion of a microprocessor(s), that require software or firmware for operation, even if the software or firmware is not physically present. Also, it may also cover an implementation of merely a processor (or multiple processors) or portion of a processor and its (or their) accompanying software and/or firmwarc, any integrated circuit, or the likc.

Generally, any procedural step or functionality is suitable to be implemented as software/firmware or by hardware without changing the idea of the present invention. Such software may be software code independent and can be specified using any known or future developed programming language, such as for example Java, C-I--I-, C, and Assembler, as long as the thnctionality defined by the method steps is preserved. Such hardware may be hardware type independent and can be implemented using any known or future developed hardware technology or any hybrids of these, such as MOS (Metal Oxide Semiconductor), CMOS (Complementary MOS), BiMOS (Bipolar MOS), BiCMOS (Bipolar CMOS), ECL (Emitter Coup'ed Logic), TTL (Transistor-Transistor Logic), etc., using for example ASIC (Application Specific IC (Integrated Circuit)) components, SIP (system in package), SOC (Systcm on chip), FPGA (Ficld-programmablc Gatc Arrays) components, CPLD (Complex Programmable Logic Device) components or DSP (Digital Signal Processor) components. A device/apparatus may be represented by a semiconductor chip, a chipset, or a (hardware) module comprising such chip or chipset; this, however, does not exclude the possibility that a functionality of a device/apparatus or module, instead of being hardware implemented, be implemented as software in a (software) module such as a computer program or a computer program product comprising executable software code portions for executionibeing run on a processor. A device may be regarded as a device/apparatus or as an asscmbly of morc than onc dcvicc/apparatus, whethcr functionally in cooperation with each other or functionally independent of each other but in a same device housing, industrial design, for example.

Apparatuses and/or means or parts thereof can be implemented as individual devices, but this does not exclude that they may be implemented in a distributed fashion throughout the system, as long as the functionality of the device is preserved.

Such and similar principles are to be considered as known to a skilled person.

Software in the sense of the present description comprises software code as such comprising code means or portions or a computer program or a computer program product for performing the respective functions, as well as software (or a computer program or a computer program product) embodied on a tangible medium such as a computer-readable (storage) medium having stored thereon a respective data structure or code means/portions or embodied in a signal or in a chip, potentially during processing thereof.

The present invention also covers any conceivable combination of method steps and operations described above, and any conceivable combination of nodes, apparatuses, modules or elements described above, as long as the above-described concepts of methodology and structural arrangement are applicable.

In summary, it can be said that the present invention and/or embodiments thereof provide measures for fading-based control of an antenna radiation pattern.

Such measures may for example comprise reception of at least one radio wave signal via an antenna unit, detection of fading conditions in relation to the received at least one radio wave signal, and control of an antenna radiation pattern of the antenna unit, at least in terms of antenna lobe width, on the basis of the detected fading conditions.

Even though the present invention and/or embodiments are described above with reference to the examples according to the accompanying drawings, it is to be understood that they are not restricted thereto. Rather, it is apparent to those skilled in the art that the present invention can be modified in many ways without departing from the scope of the inventive idea as disclosed herein.

List of acronyms and abbreviations BB Baseband D2D Device to Device DL Downlink FDD Frequency Division Duplex HSPA High Speed Packet Access LOS Line-of-Sight LTCC Low temperature co-fired ceramic LTE Long Term Evolution LTE-A Long Term Evolution Advanced MIMO Multiple Input Multiple Output NLOS Non-Line-of-Sight PWB Printed Wiring Board RF Radio Frequency RSSI Received Signal Strength Indicator RX Receive/Reception SINR Signal-to-Interference-plus-Noise Ratio SIR Signal-to-Interference-Ratio SNR Signal-to-Noise Ratio TDD Time Division Duplex TX TransmitiTransmission UE User Fquipment USB Universal Serial Bus UL Uplink V21 Vehicle to Infrastructure V2R Vehicle to Roadside V2V Vehicle to Vehicle

Claims (18)

1. Claims 1. A method of controlling an antenna radiation pattern in an antenna module, the method comprising: receiving at least one radio wave signal via an antenna unit; detecting fading conditions in relation to the received at least one radio wave signal; and controlling an antenna radiation pattern of the antenna unit in terms of antenna lobe width on the basis of the detected fading conditions.
2. 2. A method according to claim 1, wherein: the detecting comprises determining a predetined fading scenario, and the controlling comprises adjusting the antenna lobe width in accordance with the determined fading scenario.
3. 3. A method according to claim 2, wherein the predefined fading scenario comprises a line-of-sight scenario and at least one scattering scenario.
4. 4. A method according to any preceding claim, wherein: the detecting comprises measuring at least one fading-related reception parameter, and the controlling comprises adjusting the antenna lobe width in accordance with the measured at least one fading-related reception parameter.
5. 5. A method according to claim 4, wherein the at least one fading-related reception parameter comprises one or more of: at least one parameter indicative of signal propagation conditions on a radio link between the antenna unit and a communication counterpart, and at least one antenna parameter of the antenna unit.
6. 6. A method according to any preceding claim, further comprising: detecting an incoming signal direction in relation to the received at least one radio wave signal; and controlling the antenna radiation pattern of the antenna unit in terms of antenna lobe direction on the basis of the detected incoming signal direction.
7. 7. A method according to any preceding claim, further comprising: retrieving auxiliary data relating to at least one of geographical and infrastructural cnvironment information; and controlling the antenna radiation pattern of the antenna unit in terms of at least one of antenna lobe width and antenna lobe direction on the basis of the retrieved auxiliary data.
8. 8. A method according to any preceding claim, wherein: the antenna unit comprises a steerable antenna arrangement including at least one antenna or a one-or two-dimensional antenna array, and/or the method is operable at or by an apparatus which is mountcd or mountable at a mobile device operable in communication with at least one of an access point of a communication system and another mobile device, wherein the mobile device comprises at least one of a vehicle, a computer, a satellite, a communication equipment, and a communication tcrminal cquipmcnt.
9. 9. Apparatus for use in controlling an antenna radiation pattern in an antenna module, the apparatus comprising a processing system adapted to cause the apparatus to: receive at least one radio wave signal via an antenna unit; detect fading conditions in rdation to the receiyed at least one radio wave signal; and control an antenna radiation pattern of the antenna unit in tcrms of antenna lobe width on the basis of the detected fading conditions.
10. 10. Apparatus according to claim 9, wherein: thc dctecting comprises detcrmining a predefincd fading sccnario, and the controlling comprises adjusting the antenna lobe width in accordance with the determined fading scenario.
11. 11. Apparatus according to claim 10, wherein the predefined fading scenario comprises a line-of-sight scenario and at icast onc scattering scenario.
12. 12. Apparatus according to any of claims 9 to 11, wherein: the detecting comprises measuring at least one fading-related reception parameter, and the controlling comprises adjusting the antenna lobe width in accordance with the measured at least one fading-related reception parameter.
13. 13. Apparatus according to claim 12, wherein the at least one fading-related reception parameter comprises one or more of: at least one parameter indicative of signal propagation conditions on a radio link between the antenna unit and a communication counterpart, and at least one antenna parameter of the antenna unit.
14. 14. Apparatus according to any of claims 9 to 13, wherein the processing system is adapted to cause the apparatus to: detect an incoming signal direction in relation to the received at least one radio wave signal; and control the antenna radiation pattern of the antenna unit in terms of antenna lobe direction on the basis of the detected incoming signal direction.
15. 15. Apparatus according to any of claims 9 to 14, wherein the processing system is adapted to cause the apparatus to: retrieve auxiliary data relating to at least one of geographical and infrastru ctural environment information; and control the antenna radiation pattern of the antenna unit in terms of at least one of antenna lobe width and antenna lobe direction on the basis of the retrieved auxiliary data.
16. 16. Apparatus according to any of claims 9 to 15, wherein: the antenna unit comprises a steerable antenna arrangement including at least one antenna or a one-or two-dimensional antenna array, and/or the apparatus further comprises the antenna unit, and/or the apparatus is mounted or mountable at a mobile device operable in communication with at least one of an access point of a communication system and another mobile device, wherein the mobile device comprises at least one of a vehicle, a computer, a satellite, a communication equipment, and a communication terminal equipment.
17. 17. Computer software adapted to perform a method of controlling an antenna radiation pattern in an antenna module according to any of claims I to 8.
18. 18. A computer program product comprising a non-transitory computer-readable storage medium having computer readable instructions stored thereon, the computer readable instructions being executable by a computerized device to cause the computerized device to perform a method of controlling an antenna radiation pattern in an antenna module according to any of claims I to 8.Claims 1. A method of controlling an antenna radiation pattern in an antenna module, the method comprising: receiving at least one radio wave signal via an antenna unit; detecting fading conditions in relation to thc received at least onc radio wave signal, the detecting comprising determining a predefined fading scenario; and controlling an antenna radiation pattern of the antenna unit in terms of antenna lobe width on thc basis of thc dctcctcd fading conditions, thc controlling comprising adjusting thc antenna lobe width in accordancc with thc determined fading scenario, wherein the predefined fading condition comprises a line-of-sight (LOS) scenario and at least one scattering (NLOS) scenario.2. A method according to claim 1, wherein: the detecting comprises measuring at least one fading-rclatcd reception o parameter, and thc controlling comprises adjusting thc antcnna lobe width in accordancc with r the measured at least one fading-related reception parameter.3. A method according to claim 2, wherein the at least one fading-related reception paramctcr compriscs onc or morc of: at least one parameter indicative of signal propagation conditions on a radio link between the antenna unit and a communication counterpart, and at least one antenna parameter of the antenna unit.4. A method according to any preceding claim, further comprising: detecting an incoming signal direction in relation to the received at least one radio wave signal; and controlling thc antenna radiation pattcrn of thc antcnna unit in tcrms of antenna lobe direction on the basis of the detected incoming signal direction.5. A method according to any preceding claim, further comprising: retrieving auxiliary data relating to at least one of geographical and infrastructural environment information; and controlling the antenna radiation pattern of the antenna unit in terms of at least one of antenna lobe width and antenna lobe direction on the basis of the retrieved auxiliary data.6. A method according to any preceding claim, wherein: the antenna unit comprises a steerable antenna arrangcment including at least one antenna or a one-or two-dimensional antenna array, and/or the method is operable at or by an apparatus which is mounted or mountable at a mobile device operable in communication with at least one of an access point of a communication system and another mobile device, wherein the mobile device comprises at least one of a vehicle, a computer, a satellite, a communication C" equipment, and a communication terminal equipment.7. Apparatus for usc in controlling an antenna radiation pattern in an antenna module, the apparatus comprising a processing system configured to cause the apparatus to: r receive at least one radio wave signal via an antenna unit; detect fading conditions in relation to the rcccivcd at least one radio wave signal, the detecting comprising determining a predefined fading scenario; and control an antenna radiation pattem of the antenna unit in terms of antenna lobe width on the basis of the detected fading conditions, the controlling comprising adjusting the antenna lobe width in accordance with the determined fading scenario, wherein the predefined fading scenario comprises a line-of-sight (LOS) scenario and at least one scattering (NLOS) scenario.8. Apparatus according to claim 7, wherein: the detecting comprises measuring at least one fading-related reception parameter, and the controlling comprises adjusting the antenna lobe width in accordance with the mcasurcd at least one fading-rclatcd reception parameter.9. Apparatus according to claim 8, wherein the at least one fading-related reception parameter comprises one or more of at least one parameter indicative of signal propagation conditions on a radio link bctwcen thc antcnna unit and a communication counterpart, and at least one antenna parameter of the antenna unit.10. Apparatus according to any of claims 7 to 9, wherein the processing system is configured to cause the apparatus to: detect an incoming signal direction in relation to the received at least one radio wave signal; and control the antenna radiation pattern of the antenna unit in terms of antenna lobe direction on the basis of the detected incoming signal direction. (\J11. Apparatus according to any of claims 7 to 10, wherein the processing system is configured to cause the apparatus to: retrieve auxiliary data relating to at least one of geographical and infrastructural environment information; and r control the antenna radiation pattern of the antenna unit in terms of at least one of antenna lobe width and antenna lobe direction on the basis of the retrieved auxiliary data.12. Apparatus according to any of claims 7 to 11, wherein: the antenna unit comprises a steerable antenna arrangement including at least one antenna or a one-or two-dimensional antenna array, and/or the apparatus further comprises the antenna unit, and/or the apparatus is mounted or mountable at a mobile device operable in communication with at least one of an access point of a communication system and another mobile device, wherein the mobile device comprises at least one of a vehicle, a computer, a satellite, a communication equipment, and a communication terminal equipment.13. Computer software configured to perform a method of controlling an antenna radiation pattern in an antenna module according to any of claims I to 6.14. A computer program product comprising a non-transitory computer-readable storage medium having computer readable instructions stored thereon, the computer readable instructions being executable by a computerized device to cause the computerized device to perform a method of controlling an antenna radiation pattern in an antenna module according to any of claims 1 to 6. a, a, r