EP3625894A1 - Système de radio mobile comprenant un réseau de formation de faisceau et un système multi-antennes prévu pour générer un faisceau de diffusion et procédé correspondant - Google Patents

Système de radio mobile comprenant un réseau de formation de faisceau et un système multi-antennes prévu pour générer un faisceau de diffusion et procédé correspondant

Info

Publication number
EP3625894A1
EP3625894A1 EP18721721.1A EP18721721A EP3625894A1 EP 3625894 A1 EP3625894 A1 EP 3625894A1 EP 18721721 A EP18721721 A EP 18721721A EP 3625894 A1 EP3625894 A1 EP 3625894A1
Authority
EP
European Patent Office
Prior art keywords
group
radiator
signal
mobile radio
terminals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18721721.1A
Other languages
German (de)
English (en)
Inventor
Karl-August Steinhauser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Kathrein SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kathrein SE filed Critical Kathrein SE
Publication of EP3625894A1 publication Critical patent/EP3625894A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0491—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector diversity
    • H04B7/0495—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more sectors, i.e. sector diversity using overlapping sectors in the same base station to implement MIMO for antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00—Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/001—Crossed polarisation dual antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
    • H01Q3/40—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with phasing matrix
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/10—Polarisation diversity; Directional diversity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/062—Two dimensional planar arrays using dipole aerials

Definitions

  • Mobile radio system with a beamforming network and a multi-antenna system to generate a broadcast beam and a corresponding method for this
  • the invention relates to a mobile radio system or an assembly for a mobile radio system with a beamforming network and a multi-antenna system in order to generate a broadcast beam, and to a corresponding method for this.
  • this "broadcast information" via a single radiator ie via a single antenna element
  • beamforming that is, when the narrow "subscriber beams" in the RF region are generated, for example, using Butler arrays or otman lenses, because in this case a single antenna element (a single emitter) can not be addressed separately.
  • the transmitting and receiving lobes of the two individual radiators overlap over a considerable area, so that it can lead to cancellations here, when the broadcast signal is fed to individual antennas with a different phase.
  • the result would be that the broadcast signal would be destructively superimposed on individual subscribers, so that these subscribers could not receive the signal.
  • narrower antenna patterns can be generated, which are individually tailored to individual subscribers.
  • This "broadcast information” is needed, for example, when establishing a connection.
  • the object is achieved by the mobile radio system according to the invention with a beamforming network and a multiple antenna system according to claim 1, and by a method for generating a broadcast beam for a mobile radio system with a beamforming network and a multiple antenna system according to claim 14.
  • the subclaims specify further developments of the mobile radio system according to the invention.
  • the mobile radio system which comprises a beam-forming network and a multiple-antenna system, makes it possible to generate a broadcast beam.
  • the multiple antenna system comprises at least one row of radiators, which has a first group of n-radiator arrangements and a second group of n radiator arrangements, with n> 2, n> 3, n> 4, n> 5, n> 6, n> 8, n> 10, n> 12, n> 14 or n> 16 and n element of the natural numbers.
  • the multiple antenna system transmits and / or receives via both sets of radiator arrays in two linear, circular or elliptical polarizations.
  • the beamforming network comprises a first group of n-antenna connections and a second group of n-antenna connections, the first group of the n-antenna connections being electrically connected to the first group of the n-radiator arrangements and the second group of the n-antenna connections is electrically connected to the second group of n-radiator arrangements.
  • an antenna connection with (exactly) a radiator arrangement is electrically connected.
  • the beamforming network is then designed to set via the first group of n-radiator arrangements of the multiple antenna system a first group of beams, which illuminate different areas of the mobile radio cell and are aligned without overlapping or predominantly without overlap are.
  • the wording "predominantly overlap-free" is to be understood as meaning that the individual emission or reception lobes do not have more than 70% or more than 80% or more than 90% or more than 95% with respect to their spatial extent overlap and thus exceed Lappungsok are arranged.
  • the overlap region over which two emission or reception lobes with respect to their spatial extent overlap is less than 50%, 40%, 30%, 20%, 10% or less than 5% of the spatial extension (spatial extent) of respective individual emission or reception lobe.
  • the second group of n-radiator arrangements of the multiple antenna system by which a second group of radiation beams or receiving beams can be adjusted, which likewise illuminate different areas of the mobile radio cell and are aligned without overlapping or predominantly without overlap. are arranged.
  • the first group of the emission or reception lobes is decoupled to the second group of the emission or reception lobes.
  • these are polarized in different planes, in particular they are polarized orthogonal to each other.
  • the beamforming network is then designed to determine the position or alignment of the two groups of emission or reception lobes in such a way that between two adjacent emission or reception lobes of the one group there is a radiation or reception lobe of the other group, whereby the broadcast beam is formed.
  • the broadcast beam represents a sum of emission or reception lobes that belong to both the one and the other group.
  • the broadcast beam covers the mobile radio cell completely or predominantly. The broadcast beam does not say anything in which direction the information is transmitted (uplink (from user to base station) or downlink
  • the wording according to which a radiation or reception lobe of another group lies between two adjacent emission or reception lobes of one group is to be seen in particular with regard to the antenna diagram.
  • the fact that two neighboring radiating or receiving lobes do not overlap, or predominantly do not overlap, is due to the technical fact that the beamforming network does not generate all the possible radiating or receiving lobes that could be generated.
  • the broadcast beam therefore consists of several Abstrahlt. Receiving lobes of the first group (preferably the first polarization) and a plurality of emission or reception lobes of the second group (preferably the second polarization). This emission or reception lobe, so this broadcast beam is generated by the beamforming network simultaneously.
  • the wording "at the same time” means that the "broadcast information" is transmitted at the same time over all emission or reception lobes or individual or several signals are received simultaneously via one or more of the emission or reception lobes.
  • the beamforming network comprises a first group of n signal terminals and a second group of n signal terminals. Furthermore, a signal generation and detection device is provided, which is electrically connected to the n signal terminals of the first and the second group. It is designed, for example, to generate a signal for a broadcast beam and to supply this signal to a plurality, but not all, of the n signal terminals of the first and several but not all of the n signal terminals of the second group of n signal terminals the beamforming network is configured to convert the signal which is applied to a plurality of the n signal terminals of the first and the second group such that it is transmitted via a plurality of emission and reception lobes of the first and second group.
  • each signal terminal of the first group corresponds to a Abstrahlt.
  • Receiving lobe of the first group and each signal terminal of the second group corresponds to a radiating or receiving lobe of the second group. Consequently, if a signal is applied to one of the n signal terminals, it is transmitted via the emitting or receiving lobe corresponding to this signal terminal.
  • the spatial extent of the emission or reception lobe, ie of a beam of the multiple antenna system with respect to its dimensions and the area which covers this emission or reception lobe in the mobile radio cell is significantly smaller than the area covered by a single radiator would become.
  • this signal is not applied to all of the n signal terminals of the first and second groups by the signal generation and detection means simultaneously. Only those signal terminals of the first and second group are used, the corresponding emission or reception lobes of which are arranged without overlapping or predominantly without overlap with respect to one another.
  • the beamforming network is designed such that the signal or the signals, the or the is received via the Abstrahl- or reception lobe of the first and / or second group of the broadcast beam to be implemented such that this or this at the respective one or the corresponding plurality of signal terminals of the first and / or second group of n signal terminals is present or abut.
  • the signal generation and detection device detects the signal or these signals and processes them accordingly.
  • Such a further processing means in particular, an analog-to-digital conversion, the signal in particular still being converted (mixed) downwards in the direction of its frequencies in the direction of lower frequencies (for example, mixture into the base band).
  • the signal generation and detection device is designed such that it applies only to those of the n signal terminals of the first or second group a signal for the broadcast beam or at these n signal terminals a signal from a broadcast Beam can receive or receive, corresponding to emission or reception lobes of the first group and the second group of emission and reception lobes. This ensures that when emitting a signal through the broadcast beam no overlapping emission or reception lobes are used, whereby the signal to be emitted would otherwise disappear at certain points within the mobile radio cell by destructive interference. Conversely, this of course also applies to the reception of signals from one or more participants.
  • the signal generation and detection device with each signal terminal of the first group and the second group of the respective n- Signal connections to be connected to the beamforming network.
  • the signal generating and detecting means for each of these terminals comprises corresponding means for signal processing.
  • These means may comprise corresponding digital / analog converters or analog / digital converters.
  • These preferably also include appropriate amplifiers, filters and mixers.
  • the signal generation and detection device also comprises a switching device that is designed to electrically connect a plurality of the n signal connections of the first group to one another and to a plurality of the n signal connections of the second group, such that the signal generation and detection means simultaneously transmits the signal for the broadcast beam to the respective signal terminals of the first and second groups of the n signal terminals.
  • the beamforming network comprises two Butler matrices or two otman lenses, wherein the first Butler matrix or the first Rotman lens is electrically connected to the first group of n-radiator arrangements and wherein the second Butler matrix or the second Rotman lens with the second group of n-radiator arrays is electrically connected.
  • the beamforming network is therefore a purely passive network which preferably processes only analogue RF signals.
  • the beamforming network comprises n signal terminals to which the signal generation and detection device is connected and n antenna terminals to which the radiator arrangements are connected. In this case, preferably only straight values are selected for n, such as 2, 4, 6, 8, 10, 12, 14 or 16 or higher.
  • the one Butler matrix or the one Rotman lens thereby generates the emission or reception lobes of the first group (used, for example, for processing the first polarization), whereas the second Butler matrix or the second Rotman lens the emission or Receiving lobes of the second group generates (serves, for example, to process the second polarization).
  • the first group of n-radiator arrangements and the second group of n-radiator arrangements are, as already explained, preferably orthogonal to polarized each other. In particular, they are oriented at an angle of + 45 ° and at an angle of -45 ° with respect to a horizontal plane. Along this horizontal plane, the n-radiator arrangements are also aligned.
  • the horizontal plane is the plane above the ground from which the mobile radio system is arranged at a height h at a distance.
  • a left elliptical polarization or right elliptical polarization would also be possible.
  • one of the n-type radiator arrangements of the first group and the second group of radiator arrangements preferably forms a patch radiator-shaped or dipole-shaped radiator device, which is preferably in the form of a vector dipole, a crossed dipole or a dipole square.
  • the n-radiating devices are arranged side by side in a row along a horizontal or predominantly horizontal plane (less than 10 cm, 7 cm, 5 cm, 3 cm, 1 cm apart from the horizontal plane).
  • the distance between the respective radiator devices is set to a predetermined value and may be different between two radiator devices.
  • this comprises at least m emitter rows, with m> 2, where m is a natural number.
  • the m radiator rows each comprise a first group of up to n radiator arrangements and a second group of up to n radiator arrangements.
  • the rows of emitters are arranged vertically, preferably in a vertical plane spaced from each other, so that a radiator array is formed.
  • the m beamforming networks are designed to determine the position or orientation of the respective two groups of emission or reception lobes of each of the rows of emitters such that the following applies for two vertically adjacent emitter rows: a) the emission or reception lobes of the respective first groups are overlap-free or predominantly overlap-free aligned with each other; and
  • the emission or reception lobes of the respective second groups are aligned without overlap or predominantly without overlap with each other.
  • each of the further emitter rows extends in a horizontal or predominantly horizontal plane.
  • n or more than n further (preferably dipole-shaped) radiator devices are arranged next to one another in each radiator row.
  • the number of radiator devices per radiator row can also vary and does not always have to be the same.
  • the respective beamforming network is in turn electrically connected to the respective radiator arrangements of the radiator rows.
  • each beamforming network is designed to determine the position or orientation of the two groups of emission or reception lobes of the n preferably dipole radiator devices of each of the emitter rows such that between two vertically adjacent emitter rows the emission or reception lobes of the respective the first groups are aligned without overlap or predominantly without overlap to each other and that the radiating or receiving lobes of the respective second groups are also aligned without overlap or predominantly without overlap to each other.
  • the first group of the n-type radiator arrangements are electrically connected to the first group of the n antenna terminals of the respective beamforming network and the second group of the n-radiator arrangements to the second group of n antenna connections of the respective beamforming network are electrically connected.
  • the first group of n-type radiator arrangements are electrically connected to the second group of the n antenna terminals of the respective beamforming network and the second group of n-type radiator arrangements to the first group of n antenna terminals of the respective beamforming network. Network are electrically connected.
  • the mobile radio system according to the invention has the particular advantage that the signals that are fed to the beamforming network, must have no particular phase relationship to each other.
  • the emission or reception lobes of a group of Abstrahlish. Receiving lobes also overlap significantly, but then it would have to be ensured that the individual signals that are emitted via these emission or reception lobes, are coherent (have no phase angle to each other).
  • the mobile radio system would have to be calibrated accordingly so that, for example, different cable lengths of the connection cables between the signal generation and detection device and the respective signal connections of the first and the second group on the beamforming network can be excluded.
  • this is very expensive and can be avoided with the inventive solution presented here.
  • FIGS. 1A and 1B are identical to FIGS. 1A and 1B:
  • FIGS. 2A to 2C a representation of a mobile radio system with a beamforming network and a multiple antenna system, wherein Figure 1B describes the structure of the first and second group of n-radiator arrangements; FIGS. 2A to 2C:
  • FIGS. 3A and 3B are identical to FIGS. 3A and 3B.
  • FIGS. 4A to 4D are identical to FIGS. 4A to 4D.
  • FIGS. 5A, 5B are identical to FIGS. 5A, 5B.
  • radiator array consisting of several beam-forming networks and radiator arrangements
  • FIG. 6 a flow chart illustrating a method according to the invention for
  • FIG. 1A simply describes a mobile radio system 1 or an assembly for a mobile radio system 1, which comprises at least one beamforming network 2 and a multiple antenna system 3.
  • a mobile radio system 1 which can be referred to as a base station, for example, a broadcast beam 1 1 can be generated, through which the mobile radio cell can be lit.
  • the multiple antenna system 3 in this case comprises at least one row of radiators 16i, which has a first group 4a of n radiator arrangements 4a ls 4a n and a second group 4b of n radiator arrangements 4b i, ..., 4b n , with n> 2.
  • the multiple antenna system 3 transmits and / or receives via both groups 4a, 4b of n-type radiator arrays 4a ls 4a n and 4b ls 4b n, respectively, in two linear, circular or elliptical polarizations, the polarization is aligned with the first group 4a of the n-emitter assemblies 4a l 5 ..., n 4a to the polarization of the second group 4b of the n- radiator arrangements 4b ls 4b n decoupled.
  • a decoupled orientation can be present, for example, if both groups 4a, 4b are differently polarized, for example orthogonal, preferably -45 ° and + 45 °.
  • FIG. 1B shows how the multiple antenna system 3 is composed of the first group 4a of n radiator arrangements 4a ls 4a n and the second group 4b of n radiator arrangements 4b ls 4b n . It can be seen that the n-type radiator arrangements 4a 1 5 4a n or 4b 1 5 4b n of both groups 4a, 4b are oriented differently, which causes a different polarization, which indicates that they are aligned with each other decoupled. This means that the first group 4a of the n-type radiator arrangements 4a 1 5
  • the first and the second group 4a, 4b preferably comprise the same number of antenna element arrangements n- 4a ls 4a and 4b n ls 4b n.
  • Figure 1B is shown also that in each case one of the n-emitter assemblies 4a l 5 ... 4a of the first group 4a and the n-emitter assemblies 4a ls n ...
  • the 4a of the second group 4b n is a patch radiator shaped or dipole-shaped radiator device 5 l Form 5 5 n , which is preferably in the form of a vector dipole, a Wiendipols or a Dipolquadrats formed.
  • the multiple antenna system 3 also comprises a reflector, not shown, on which the n radiator devices 5 1 5 5 n are arranged directly or indirectly.
  • the entire multiple antenna system 3 is preferably accommodated in a rotor.
  • the n-radiator devices 5 ls ..., 5 n are shown by dashed lines in FIG. 1B for a better overview. They are spaced apart from each other along a horizon- talen or predominantly horizontal plane 6, which is shown in dashed lines in Figure 1A.
  • the beamforming network 2 comprises a first group 7a of n antenna terminals 7a 1 5 7a n and a second group 7b of n antenna terminals 7b 1 5 7b n .
  • Antenna terminals 7a l 5 7a n is electrically connected to the first group 4a of the n-type radiator arrangements 4a l 5 4a n .
  • one of the n antenna terminals 7a 1, 7a n is in each case electrically conductively connected to one of the n radiator arrangements 4a 1, ..., 4a n .
  • the second group 7b of the n-antenna connections 7b i,..., 7b n is also electrically conductively connected to the second group 4b of the n-radiator arrangements 4b i,..., 4b n .
  • the beamforming network 2 is designed to set via the first group 4a of the n-radiator arrangements 4a l 5 4a n of the multiple antenna system 3, a first group 8a of radiating or receiving lobes 8a l 5 8a n illuminating different areas of the mobile radio cell.
  • These radiation or reception lobes 8a l 5 8 a n can also be referred to as beams.
  • the second group 4b with also n radiator arrangements 4b l 5 4b n of the multiple antenna system 3.
  • a second group 8b of Abstrahl- or reception lobes 8b l 5 8b n are set, which also illuminate different areas of the mobile radio cell ,
  • each emission or reception lobe 8a 1 5 8a n of the first group 8a is congruent with a respective emission lobe 8b i,..., 8b n of the second group 8b.
  • a respective emission lobe 8b i,..., 8b n of the second group 8b there are for ease of illustration, only six radiating or receiving lobes 8a l 5 8a and 8b l5 n n 8b of the first and second groups 8a and 8b.
  • n-emitting and receiving lobes 8a 1 5 8a n or 8b i, 8b n of each group 8a, 8b could also be formed.
  • the beamforming network 2 also includes a first group 9a of n signal terminals 9a i? 9a n and a second group 9b of n signal terminals 9bi, 9b n .
  • the beamforming network 2 comprises two Butler matrices 2a, 2b or two otman lenses.
  • the first Butler matrix 2a and the first Rotman lens having the first group 4a of n-emitter assemblies 4a ls n 4a is electrically connected.
  • the Butler matrices 2a, 2b are each formed as nxn matrices, where n is at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 1 1, 12, 13, 14, 15 or 16 corresponds. Preferably, n is straight.
  • Each Butler matrix 2a, 2b preferably has as many antenna terminals 7a and 7b n l 5 7a 7b l5 n as the first or second group 4a, 4b radiator arrangements 4a 4a ls n or 4bi, 4b n.
  • Each Butler matrix 2a, 2b in turn has as many signal terminals 9ai, 9a n or 9bi, 9b n as antenna terminals 7a l 5 7a n
  • the mobile radio system 1 also comprises a signal generation and detection device 10.
  • the signal generation and detection device 10 is connected to the n signal connections 9a i? ..., 9a n of the first group 9a and the n-signal terminals 9 bi, 9b n electrically conductively connected to the second group 9b.
  • the signal generation and detection device 10 comprises means for generating signals, in particular analog signals, and for detecting signals, in particular for converting analog signals into digital signals.
  • the signal generation and detection device 10 preferably comprises, in addition to a processor unit, an A / D converter or D / A converter, mixer and filter.
  • the signal generation and detection means 10 comprises for each of the n signal terminals 9a ls 9a n or 9b l 5 9b n of the first and second group 9a, 9b a corresponding A / D converter and / or a D / A converter and at least one mixer and at least one filter.
  • the signal generation and detection device 10 is configured to generate a signal for a broadcast beam 1 1 and to supply this signal to a plurality of the n signal connections 9 a l 9 a n of the first group 9 a, and to supply this signal to a plurality of the n signal terminals 9bi, 9b n of the second group 9b.
  • the beamforming network 2 is then configured to receive the signal which is applied to a plurality of the n signal terminals 9a i? 9b n or 9b i,. , , , 9b n of the first and second groups 9a, 9b is applied in such a way that it is emitted over a plurality of emission or reception lobes 8a 1 5 8a n or 8bi, 8b n of the first and the second group 8a, 8b becomes.
  • 8a n corresponds to the first group 8a.
  • a signal is to be received by the signal generation and detection device 10.
  • a signal which is emitted, for example, from a mobile terminal in the coverage area of the mobile radio system 1 this can by the corresponding radiating or receiving lobe 8a l 5 8a n of the first group 8a or by the corresponding radiating or Receiving lobe 8bi, 8b n of the second group 8b are received.
  • This signal is then supplied to the first group 7a with n antenna terminals 7a 1 5 7a n or the second group 7b with n antenna terminals 7b i, 7b n .
  • the beamforming network 2 converts this information accordingly, so that the signal is output to one of the n signal terminals 9a 1 5 9a n of the first group 9a and to one of the n signal terminals 9b 1 5b n of the second group 9b0.
  • FIG. 2A shows an antenna diagram as it may result for the mobile radio system 1 according to FIG. 1A.
  • the antenna diagram is logarithmic in Decibel applied.
  • the emission or reception lobes 8a 1 5 8a n of the first group 8a are superimposed on the emission or reception lobes 8b i, 8b n of the second group 8b.
  • side lobes are still displayed, which are disregarded for further understanding of the application.
  • the individual radiating or receiving lobes 8a l 5 8a n or 8 bi, 8b n of the first and second groups 8a, 8b are in terms of their position and orientation is formed such that they illuminate the mobile radio cell completely and preferably not radiate to the neighboring mobile radio cells.
  • a broadcast beam could 1 1 set as he
  • Figure 2B for the first group 8a or for the second group 8b, which is congruent with the first group 8a, is shown.
  • the peculiarity of Figure 2B is that the signal all n-signal terminals 9a l 5 9a n of the first group 9a and all n-signal terminals 9a l 5 9b n the second group 9b with a specially optimized phase position (not all phases must be exact be the same in order to be able to set an optimal broadcast beam 1 1 in each application), preferably with the same phase angle. For this reason, in the antenna diagram of FIG. 2B no destructive interferences are formed in the emission lobes 8a ls 8a n or 8bi, 8b n of the first or second group 8a, 8b. Such a coherent phase position can be achieved when the mobile radio system 1 has been extensively calibrated.
  • destructive interferences 12 may occur in one or more directions, as can be seen in FIG. 2C. In these areas of the mobile radio cell where these destructive interferences 12 are present, the signal which is transmitted via the broadcast beam 1 1 can not be received by the corresponding mobile terminals. The same applies to the receive direction if corresponding phase differences between the n signal terminals 9a i? 9a n or 9bi, 9b n of the first and the second group 9a, 9b of the beamforming network 2 and the signal generation and detection device 10 are present. To avoid such destructive interference 12, as already explained, an extensive calibration is necessary.
  • FIGS 3 A and 3B show a mobile radio system 1 according to the invention, in which the signals to be transmitted via the broadcast beam 1 1, different signal propagation times to the respective signal terminals 9a l 5 9a n of the first group 9a and the signal terminals 9b i , ..., 9b n of the second group 9b.
  • the beamforming network 2 and the multiple antenna arrangement 3, like the signal generation and detection device 10, are constructed according to the description of the previous figures, and therefore reference is made to them.
  • n no longer all emission or reception lobes 8ai, 8a n of the first group 8a and not all Abstrahlging. Receiving lobes 8 bi, n is the second group 8b used 8b to form the broadcast-Beam 1.
  • the beam-forming network 2 is excluded to about the first group 4a of the n-emitter assemblies 4a l 5 4 n of the multiple antenna system 3, a first group 8 of radiating or receiving lobes 8AI, 8a set n, illuminate the different areas of the mobile radio cell and are aligned without overlap or predominantly overlap with each other.
  • te group 8b of Abstrahl- or reception lobes 8bi, 8b n set that illuminate different areas of the mobile radio cell and are aligned without overlap or predominantly overlap with each other.
  • the signal generation and detection device 10 also comprises at least one switching device 13.
  • This is configured to have a plurality of the n signal connections 9a l 5 9a n of the first group 9a with one another and also with a plurality, but not all, of the n signal connections 9b l 5 9b n of the second group 9b to be electrically connected to each other, so that the signal generating and detecting means 10 the signal for the broadcast beam simultaneously to the respective signal terminals 9a l 5 9a n and 9b l 5 9b n the first and second group 9a, 9b transmitted.
  • the switching device 13 is formed to each have a plurality of connected with each other even or even-numbered signal terminals 9a l 5 9a of the first group, each with several 9a n odd and odd signal terminals 9b i, ..., n 9b of the second group to electrically 9b connect.
  • 9a i ..., 9a n of the first group 9a
  • 9b i 9b n of the second group 9b
  • FIGS. 4A and 4B show an antenna diagram of the mobile radio system 1 according to the invention.
  • those emission beams or reception lobes 8ai,... 8a n of the first group 8a are shown whose signal terminals 9a i? 9a n of the first group 9a of the beamforming network 2 connected to the signal generation and detection device 10 and are fed by this.
  • the signal generation and detection device 10 could also receive and / or process the respective data or signals at the corresponding signal terminals 9ai,... 9a n of the first group 9a.
  • FIGS. 3A and 3B for the sake of clarity, only three emission or reception lobes 8a 1, 5 8a n of the first group 8a are excited.
  • the generated or used emission lobes or reception lobes 8ai, 8a n of the first group 8a are arranged mutually overlap-free or predominantly overlap-free relative to one another.
  • the same also applies to the emission or reception lobes 8b i, 8b n of the second group 8b.
  • FIG. 4C shows an antenna diagram of the mobile radio system 1 according to the invention when between the signals at the inputs of the n Signal line terminals 9a i? 9a n or 9bi, 9b n of the first and second group 9a, 9b, which are used to generate the broadcast beam 1 1, the same phase conditions or specially optimized phase positions prevail, the signals consequently at the respective n signal line terminals 9a i? 9a n or 9b i, ..., 9b n of the first and second group 9a, 9b have the same phase position, so that a broadcast beam 1 1 is formed, which illuminates the mobile radio cell as possible. This would be the optimal case, which can only be achieved safely by a corresponding calibration. However, due to the construction according to the invention or the activation of the mobile radio system 1 according to the invention, no destructive interferences occur even without a corresponding calibration.
  • FIG. 4D shows how an antenna diagram of the mobile radio system 1 according to the invention can look if the corresponding phases at the signal terminals 9a i? 9a n or 9 bi, 9b n of the two groups 9a, 9b, which are used for the broadcast beam 1 1, arbitrarily diced are aligned with each other. In this case, however, there are no destructive interferences 12, as they are still shown in Figure 2C. Nevertheless, the mobile radio cell is still illuminated optimally.
  • the position or orientation of the two groups 8a, 8b of radiating or receiving lobes 8a l 5 8a n or 8 bi, 8b n set such that between two adjacent radiating and receiving lobes 8AI, 8a n or 8 bi, 8b n the same group 8a or 8b is a radiation or reception lobe 8b i, ..., 8b n or 8a l 5 ..., 8a n of the other group 8b or 8a, whereby the broadcast beam 1 1 according to the invention is formed ,
  • the first group 4a of n-type radiator arrangements 4a ls 4a n and the second group 4b of n-radiator arrangements 4b ls 4b n are polarized orthogonal to one another, in particular at an angle of +45 ° and at an angle of -45 ° with respect to a horizontal plane 6.
  • Other types of polarization would also be conceivable.
  • the currents emitted by the radiator arrangements 4a i? 4a n and 4b l 5 4b n of the two groups 4a and 4b formed n-radiating devices 5 l 5 5 n arranged in a row along the horizontal plane 6 adjacent to each other.
  • the mobile radio system 1 can comprise a radiator array 15.
  • the mobile radio system 1 comprises a plurality of m radiator rows 16 l 5 16 m , which are preferably constructed the same.
  • Each of these further emitter rows 16 2 , 16 m preferably comprises up to or more than n emitter devices 5 ls ..., 5 n .
  • each radiator row 16 l 5 16 m is arranged one above the other. This means in particular that each radiator row 16 l 5 16 m 16 m 5 is parallel to the other rows of emitters 16 disposed l. This means that each radiator L series with its n-emitter devices 5 5 n 16 extends 5 16 m ls horizontal, for example in the X direction, whereas the individual radiators rows 16 l added 5 16 m in the vertical direction, for example in the Y direction, are arranged to each other and wherein the main emission direction then extends in the Z direction.
  • each additional row of emitters 16 2 , 16 m there is another beamforming network (not shown) for each additional row of emitters 16 2 , 16 m .
  • This is preferably constructed the same as the previously described beam-forming network 2.
  • the other beam-forming networks are electrically connected to the antenna element arrangements of the further emitter rows 16 2, 16 m.
  • the beam-forming networks 2 are adapted to the position or orientation of the two groups 8a, 8b of radiating or receiving lobes 8a l 5 8a n, 8b l 5 8b n each of the m emitter rows 16 l determine 5 16 m such that for two vertically adjacent rows of emitters 16 l 5 16 m, the following applies: a) the emission or reception lobes 8a 1 5 8a n of the respective first groups 8a are aligned without overlapping or predominantly without overlapping (in the antenna diagram); and
  • each of the m emitter rows 16 l 5 16 m is in turn electrically connected to its own beamforming network 2, preferably with two butler matrices 2 a, 2 b or two otman lenses.
  • the Butler matrices 2a, 2b of two successive, adjacent radiator rows 16 l 5 16 m are connected to different signal terminals 9a i? 9a n or 9bi, 9b n fed.
  • 16 l 5 16 m in a row of emitters only straight signal terminals 9a i?
  • each n dipole-shaped radiator devices 5i, n 5 there are two additional 2a Rotman lenses or Butler matrices, 2b.
  • the signal generation and detection device 10 must also be adapted to the changed circumstances. In this case, it is ensured that no destructive interferences occur even when the antenna array 15 is used, which comprises a plurality of rows of emitters 16 l 5 16 m each, or up to or more than n emitter devices 5 l 5 5 n About this emitter or antenna array 15, a broadcast beam 1 1 is generated.
  • m n. It would also be possible that m> n or m ⁇ n.
  • dashed line are the emission or reception lobes 8b l 5 8b n the second group 8b for three rows of radiators 16 l 5 16 m with each n-
  • FIG. 5B shows a further advantage of the mobile radio system 1 according to the invention.
  • the first groups 4a of up to n radiator arrangements 4a ls 4a n of two vertically adjacent rows of radiators 16 l 5 16 m are alternately connected either to the first group 7a (solid line) of up to n antenna terminals 7a l 5 7a n of the respective beamforming Network 2 or with the second group 7b (dashed line) of up to n antenna terminals 7b l 5 7b n of the respective beamforming network 2 electrically connected.
  • the second groups 4b this is exactly the opposite.
  • the first group 4a of up to n radiator arrangements 4a l 5 4a n of a row of radiators 16i is electrically connected to the first group 7a (solid line) of up to n antenna terminals 7a ls 7a n of the respective beamforming network 2.
  • the first group 4a of up to n-emitter assemblies 4a ls 4a n the other hand, with the second group 7b (broken line) of up to n-antenna terminals 7b l 5 7b is n of the respective beam-forming network electrically connected.
  • the individual radiator devices 5 l 5 5 n of the radiator rows 16 2 , ..., 16 m best possible decoupled.
  • FIG. 6 shows a flow chart which explains how the broadcast beam 1 1 is generated.
  • a corresponding mobile radio system 1 is required, as has already been described.
  • This includes a multiple antenna system 3 and a beamforming network 2.
  • the beamforming network 2 selects or sets a first group 8a of emission lobes 8a 1s , 8a n , the n of the multiple antenna system 3 illuminate different areas of the mobile radio cell via the first group 4a of n-emitter assemblies 4a ls 4a and do not overlap or predominantly free of overlap aligned.
  • the beamforming network 2 selects or sets a second group 8b of radiation or reception lobes 8b ls 8b n , respectively, which via the second group 4b of n radiator arrangements 4b i, 4b n of the Multiple antenna system 3 different areas of the mobile radio cell illuminate and are aligned without overlap or predominantly without overlap to each other.
  • the beamforming network 2 determines the position or orientation of the two groups 8a, 8b of emission or reception lobes 8ai, 8a n and 8b 1 5 8b n so that between two adjacent emission fields or receive lobes 8a ls 8a n or 8b ls 8b n the one group 8a or 8b is a radiation or reception lobe 8b l 5 8b n or 8a l 5 8a n the other group 8b or 8a, which ultimately the broadcast beam 1 is formed.
  • the invention is not limited to the described embodiments. In the context of the invention, all described and / or drawn features can be combined with each other as desired.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

Système de radio mobile (1) comprenant un réseau de formation de faisceau (2) et un système multi-antennes (3) prévu pour générer un faisceau de diffusion (11). Le système multi-antennes (3) comprend un premier groupe (4a) d'agencements d'antennes rayonnantes n (4a1,..., 4an) et un deuxième groupe (4b) d'agencements d'antennes rayonnantes n (4b1,..., 4bn). Le réseau de formation de faisceau (2) est relié électriquement au système multi-antennes (3) et est formé pour régler un premier groupe (4a) de lobes de rayonnement et/ou de réception sans chevauchement (4a1,..., 4an) par le biais du premier groupe (8a) d'agencements d'antennes rayonnantes n (8a1,..., 8an) et pour régler un deuxième groupe (4b) de lobes de rayonnement et/ou de réception sans chevauchement (4b1,...,4bn) par le biais du deuxième groupe (8b) d'agencements d'antennes rayonnantes n (8b1,...., 8bn, la position des lobes de rayonnement et/ou de réception (8a1,..., 8an;8b1,..., 8bn étant fixée de telle sorte qu'entre deux lobes de rayonnement et/ou de réception adjacents (8a1,..., 8an;8b1,..., 8bn) d'un groupe (8a; 8b) se situe un lobe de rayonnement et/ou de réception (8b1,..., 8bn;8a1,...8an) de l'autre groupe (8b; 8a).
EP18721721.1A 2017-05-17 2018-04-24 Système de radio mobile comprenant un réseau de formation de faisceau et un système multi-antennes prévu pour générer un faisceau de diffusion et procédé correspondant Withdrawn EP3625894A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017110725.8A DE102017110725A1 (de) 2017-05-17 2017-05-17 Mobilfunksystem mit einem Beamforming-Netzwerk und einem Mehrfachantennensystem, um ein Broadcast-Beam zu erzeugen sowie ein entsprechendes Verfahren hierfür
PCT/EP2018/060422 WO2018210535A1 (fr) 2017-05-17 2018-04-24 Système de radio mobile comprenant un réseau de formation de faisceau et un système multi-antennes prévu pour générer un faisceau de diffusion et procédé correspondant

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US6356771B1 (en) * 1998-07-10 2002-03-12 Ericsson, Inc. Radio communications system with adaptive polarization
US6577879B1 (en) * 2000-06-21 2003-06-10 Telefonaktiebolaget Lm Ericsson (Publ) System and method for simultaneous transmission of signals in multiple beams without feeder cable coherency
SE523685C2 (sv) 2001-11-29 2004-05-11 Ericsson Telefon Ab L M TX-diversitet med två fasta strålar
EP1983660A1 (fr) * 2007-04-16 2008-10-22 Nokia Siemens Networks Oy Transmetteur/récepteur configurable à antennes multiples
US20090005120A1 (en) * 2007-06-28 2009-01-01 Elektrobit Wireless Communications Oy Transmission method for common channels

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DE102017110725A1 (de) 2018-11-22

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