Compensator

Abstract

Compensator (40) for compensating for line and / or coupling losses when connecting a mobile communication device (10) to an external antenna structure (50, 60), in particular to an external vehicle antenna structure, wherein the compensator (40) has a first signal path (41) for connecting the mobile communication device to a first external antenna (50) of the external antenna structure (50, 60), wherein the compensator (40) has a second signal path (42) for connecting the mobile communication device to a second external antenna (60) of the external antenna structure (50, 60), characterized in that the signal processing in one of the two signal paths (41, 42) is dependent on the signal processing in the other signal path (42, 41) and / or dependent on measured values ​​determined in the other signal path (42, 41).

Description

[0001] The present invention relates to a compensator for compensating for line and / or coupling losses when connecting a mobile communication device to an external antenna structure. In particular, the compensator according to the invention can be used when connecting a mobile communication device to an external vehicle antenna structure.

[0002] Furthermore, systems for wirelessly coupling the mobile communication device to the external antenna structure are known. These typically feature a coupling structure for wireless connection to the antenna structure of the mobile communication device. The coupling structure is usually located in the area of ​​a receptacle for the mobile communication device and couples wirelessly to the antenna structure of the mobile communication device, so that the transmitted signals from the mobile communication device can be forwarded to the external antenna and the signals received by the external antenna can be forwarded to the antenna structure of the mobile communication device. In DE 10 2007 039 879 A1, the coupling structure has a single connection, which is connected to an external antenna via an antenna cable.In parallel with forwarding the mobile phone signals, the system can establish a Bluetooth interface to the mobile phone, through which the mobile phone can be controlled via a control unit or connected to a hands-free system.

[0003] Most compensators known from the prior art support only one signal path to and from the mobile communication device and therefore have only one connection for the high-frequency mobile communication signals to an external antenna and one connection to a coupling structure for coupling to the mobile communication device. Such compensators are known, for example, from DE 10 2009 027 358 A1, EP 1 841 083 A2, EP 2 304 877 B1, EP 1 371 144 B1, US 6 175 748 B1 and US 2003 / 0 100 351 A1.

[0004] The publication JP H11-122137 A shows a compensator for compensating for line losses between a mobile phone and the first and second external antennas of a vehicle. The mobile phone has two antenna connectors, which are connected to the two antennas via the compensator in a fixed configuration. Received signals are amplified in both signal paths of the amplifier. Transmitted signals from the mobile phone are transmitted and amplified in only one of the amplifier's signal paths.

[0005] The object of the present invention is to provide an improved compensator which also supports extended functionalities of modern mobile communication devices and / or modern mobile communication standards.

[0006] This problem is solved in a first aspect of the invention by a compensator according to claim 1 and in a second aspect of the invention by a compensator according to claim 6. Advantageous embodiments of the present invention are the subject of the dependent claims.

[0007] The present invention comprises, in a first aspect, a compensator for compensating for line and / or coupling losses when connecting a mobile communication device to an external antenna structure, wherein the compensator has a first signal path for connecting the mobile communication device to a first external antenna of the external antenna structure. According to the invention, the compensator further comprises a second signal path for connecting the mobile communication device to a second external antenna of the external antenna structure.

[0008] The inventors of the present invention recognized that the compensators known from the prior art do not support the MIMO functionality used in mobile communication standards such as LTE, and therefore lead to performance losses, for example with regard to data rate and availability. In contrast, the second signal path provided by the invention, which allows connection to a second external antenna, supports the MIMO functionality of such methods.

[0009] The compensator according to the invention preferably has two connections for linking to a coupling structure for connecting to the mobile communication device and two connections for linking to the first and second antennas. The two external antennas can be connected to the compensator separately. Furthermore, two connections of the coupling structure for linking to the mobile communication device can also be connected to the compensator separately. The coupling structure can serve for wireless linking to the mobile communication device, but alternatively, it can also be connected to the mobile communication device via a wired connection, in which case the coupling structure essentially consists of signal lines.

[0010] Preferably, the signal paths each connect one of the terminals for connection to the coupling structure and one of the terminals for connection to an external antenna. In particular, the signal transmission via the two signal paths takes place separately. Furthermore, the two signal paths of the compensator according to the invention can be two parallel signal paths.

[0011] In a preferred embodiment of the present invention, the two signal paths of the compensator according to the invention can be configured differently. In particular, the control unit that adjusts the gain for the two signal paths can be configured differently in the two signal paths.

[0012] According to the invention, the different design of the two signal paths reduces the circuit complexity, which would otherwise have to be operated with two identical signal paths, while still providing good MIMO functionality.

[0013] In a preferred embodiment of the present invention, amplification occurs in both the uplink and downlink directions in the first signal path, while in the second signal path, amplification occurs only in the downlink, or only in the uplink, and preferably only in the downlink. This allows for a significantly simpler circuit design for the second signal path, while still achieving MIMO functionality in at least one direction. This addresses the fact that LTE currently only supports MIMO functionality in the downlink.

[0014] Preferably, the connection of the two terminals of the compensator according to the invention to the mobile communication terminal and in particular to the coupling structure is carried out in such a way that both up-link and down-link signals are transmitted via the first signal path, while only or predominantly down-link signals are transmitted via the second signal path.

[0015] According to the present invention, signal processing in one of the two signal paths is performed depending on the signal processing in the other signal path and / or depending on measured values ​​determined in the other signal path. This reduces the circuit complexity, since data that would be acquired anyway for signal processing in a first signal path can also be used for signal processing in the other signal path.

[0016] Preferably, the signal processing in the second signal path is carried out depending on the signal processing in the first signal path and / or depending on measured values ​​determined in the first signal path.

[0017] In a preferred embodiment, the frequency selection in one of the signal paths can be set depending on the frequency selection in the other signal path. In particular, the currently used mobile communication operating mode and / or the currently used mobile communication frequency band can be determined in one of the signal paths by evaluating the signals, and the frequency selection in both signal paths can be set based on the results. Specifically, the frequency selection in the second signal path can be set depending on the currently used mobile communication operating mode and / or the currently used mobile communication frequency band determined in the first signal path.

[0018] Alternatively or additionally, the necessary gain for both signal paths can be determined and set based on measured values ​​in one signal path. In particular, the gain in the second signal path can be adjusted depending on the gain in the first signal path.

[0019] Furthermore, it can be provided that the signal processing is carried out by evaluating the uplink signals in at least one of the signal paths, and preferably in the first signal path. In particular, the signal processing in the second signal path can be based on measured values ​​of the uplink signals in the first signal path.

[0020] Furthermore, the currently used mobile communication operating mode and / or the currently used mobile communication frequency band can be determined from the uplink signals. This data is preferably used to control signal processing and, in particular, for frequency selection and / or signal separation.

[0021] Furthermore, the amplification in the second signal path can be adjusted depending on the currently used mobile communication operating mode. In particular, it can be configured that the second signal path is switched on or off depending on the currently used mobile communication operating mode. Preferably, the second signal path is only activated if the currently used mobile communication operating mode actually supports MIMO operation. If the operating mode does not support MIMO operation, the second signal path is switched off to avoid interference with the first signal path.

[0022] The currently used mobile communication mode can be determined, as described above, based on the signals in one of the signal paths, and in particular based on the uplink signal and / or in the first signal path. Alternatively, the information on the current mobile communication mode can also be obtained directly from the mobile communication device via a communication channel, as will be explained in more detail below.

[0023] According to a second aspect, the present invention comprises a compensator for compensating for line and / or coupling losses when connecting a mobile communication device to an external antenna structure, wherein the compensator has a first signal path for connecting the mobile communication device to a first external antenna of the external antenna structure. The invention provides that the compensator has a communication interface via which a communication channel with a mobile communication device can be established. The present invention takes advantage of the fact that modern mobile communication devices typically already have certain communication interfaces via which data for the operation of the mobile communication device can be read out. These are preferably used in the compensator to improve system performance.

[0024] Preferably, the signal processing in the first signal path can be configured based on data received by the compensator from the mobile device via the communication channel. Besides improving system performance, this can also potentially reduce the complexity of signal evaluation within the compensator, as the measured values ​​can be supplemented or replaced by data provided directly by the mobile device.

[0025] The data that the compensator receives from the mobile communication device may include, in particular, data on the currently used mobile communication operating mode and / or the currently used mobile frequency band and / or the current transmit level and / or the current receive level of the mobile communication device.

[0026] Furthermore, the data received from the mobile communication device can be used to configure signal path separation and / or frequency selection and / or amplification in the compensator. In particular, the data relating to the currently used mobile communication operating mode can be used to configure the appropriate signal path separation for separating the uplink and downlink signals, and especially the corresponding frequency selection and / or time selection.

[0027] Furthermore, the gain in the signal path can be adjusted based on the current receive level and / or transmit level of the mobile terminal, and in particular in the up-link by comparing the current transmit level of the mobile terminal with a measured up-link signal level in the compensator, and / or in the down-link by comparing the current receive level of the mobile terminal with a down-link signal level measured in the compensator.

[0028] In a preferred embodiment of the present invention, the communication channel through which the compensator communicates with the mobile communication device is a wireless communication channel. For example, this can be Near-Field Communication (NFC), Bluetooth, and / or WLAN. Such a wireless communication channel is particularly useful when the compensator is used to connect a mobile phone to an external antenna. If, on the other hand, the compensator is used to connect a permanently installed mobile communication device to an external antenna, the communication channel can, of course, also be wired.

[0029] In one possible embodiment of the present invention, the compensator can include a transmitting and / or receiving unit and / or an antenna for the wireless communication channel. Such a configuration can be used in particular when the compensator is arranged relatively close to a mounting and / or support for the mobile communication device.

[0030] Alternatively, the compensator can also be connected via a signal line to a transmitter and / or receiver unit and / or an antenna for a wireless communication channel. In particular, the transmitter and / or receiver unit and / or antenna is located in the area of ​​a mounting and / or storage area for the mobile communication device and is connected to the compensator via a signal line. This allows the compensator to be positioned further away from the mounting and / or storage area for the mobile communication device. In this case, a transmitter and / or receiver unit and / or antenna for the wireless communication channel that is already located in the area of ​​such a mounting and / or storage area can be used or shared.

[0031] It may be provided that a connection of the compensator for coupling the first signal path of the compensator to the mobile communication device is also used for communication with the mobile communication device and, in particular, for communication with the transmitting and / or receiving unit and / or antenna for the wireless communication channel. In particular, frequency separation is achieved in this process.

[0032] The second aspect of the present invention, as just described, can be used independently of the first aspect of the present invention described above. Likewise, the first aspect can also be used independently of the second aspect.

[0033] In particular, the first aspect can also be used even if no communication interface is provided to establish a communication channel between the compensator and the mobile communication device. Furthermore, the second aspect can also be used even if the compensator only has one signal path and therefore can only establish a connection with a single external antenna.

[0034] The present invention also comprises a combination of the first and second aspects. In particular, the compensator according to the second aspect, as described in more detail above, can have a second signal path for connecting the mobile communication device to a second external antenna of the external antenna structure. In such a combination of the first and second aspects, it is preferably provided that the signal processing in the two signal paths is adjusted depending on data that the compensator receives from the mobile communication device via the communication channel. Preferably, the adjustment for the two communication channels is carried out differently.

[0035] Preferred embodiments of a compensator according to the invention, both according to the first and the second aspect, are described in more detail below: The present invention can initially be used with any external antenna structures.

[0036] If the external antenna structure has a first and a second external antenna, the first external antenna of the external antenna structure can be a primary external antenna, and the second external antenna can be a secondary antenna.

[0037] Furthermore, the first and second external antennas can be arranged within a single component, e.g., in a roof antenna, or spatially separated in two components, e.g., one antenna in a roof antenna and the other in a side mirror. The external antenna structure can therefore also be a distributed antenna structure.

[0038] The compensator according to the invention is preferably used in the automotive sector, in particular for connecting a mobile communication device to an external vehicle antenna structure. The vehicle antenna structure can be, in particular, a roof antenna and / or an antenna arranged in an exterior mirror.

[0039] The present invention can be used with any mobile communication device. The mobile communication device can, for example, be a device whose antenna structure is wirelessly connected via a coupling structure, wherein the coupling structure is then connected to the vehicle's external antenna structure via the compensator according to the invention. In particular, the mobile communication devices can be portable devices, and especially mobile phones such as smartphones.

[0040] However, the mobile communication device can also be a unit permanently installed in the car, which, for example, provides a data connection via the mobile network. In this case, the connection between the mobile communication device and the compensator can be wired.

[0041] The compensator according to the invention serves to amplify the mobile radio frequency signals and preferably amplifies both transmitting signals from the mobile communication terminal, which are forwarded to the external antenna structure (up-link), and received signals, which are forwarded from the external antenna structure to the mobile communication terminal (down-link).

[0042] The compensator according to the invention can comprise at least one isolation arrangement for separating the uplink signal and the downlink signal in the first signal path. In particular, depending on the active mobile communication operating mode, the signal separation can be performed according to frequency or time. The active mobile communication operating mode can be detected either by analyzing the signal in the signal path, and in particular the uplink signal, and / or the data provided by the mobile communication device can be used to control the isolation arrangement.

[0043] Preferably, no isolating arrangement is provided in the second signal path to separate the uplink and downlink signals. This allows the second signal path to be designed considerably more simply, with amplification preferably only occurring in the downlink direction in the second signal path.

[0044] Furthermore, the compensator according to the invention can include frequency selection in the first signal path and / or in the second signal path. The frequency selection is preferably based on the currently used mobile communication operating mode and / or the currently used mobile communication frequency band. This data can also be determined by analyzing the signal, in particular the uplink signal, and / or obtained from the mobile communication terminal. The frequency selection preferably involves a controllable frequency filter. In a possible embodiment of the present invention, the frequency selection in the second signal path can be controlled depending on the first signal path, and in particular based on a current mobile communication operating mode and / or a current mobile communication frequency band determined in the first signal path.

[0045] Furthermore, the compensator can include a measuring arrangement for measuring the signal level of the uplink signal and / or the downlink signal in the first signal path. Preferably, a separation arrangement is provided which divides the first signal path into an uplink signal path and a downlink signal path, with a measuring arrangement for measuring the signal level being provided in each of these sub-signal paths. Furthermore, a measuring arrangement for measuring the signal level of the uplink signal and / or the downlink signal can be provided in the second signal path, preferably only a measuring arrangement for measuring the downlink signal being provided in the second signal path. In particular, no separation between the uplink signal and the downlink signal is required in the second signal path.

[0046] The measurement setups can each consist of a signal coupler and a power measurement.

[0047] Furthermore, the compensator according to the invention can have at least one amplifier each for the up-link signal and the down-link signal in the first signal path, wherein the amplifiers are preferably arranged in the respective sub-signal paths of the first signal path. In the second signal path, at least one amplifier is preferably provided for the down-link signal. A power amplifier is preferably provided as the amplifier for the up-link signal, and a low-noise amplifier (LNA) is used for each of the down-link signals.

[0048] The compensator according to the invention can be designed such that the gain setting in the compensator is carried out according to at least one of the following variants: According to a first approach, the gain in the downlink path can be adjusted based on the gain and / or measured values ​​of the uplink path, particularly the signal level of the uplink path. Specifically, the gain in the respective downlink paths of the first and second signal paths can be adjusted based on the gain and / or measured values ​​of the uplink path of the first signal path. In particular, the same and / or similar values ​​can be used for the gains in the uplink and downlink. By comparing the signal level of the uplink signal with a predefined value, the coupling loss can be determined, and the gains can be adjusted to compensate for the coupling loss.

[0049] According to a second variant, the gain in the down-link path can be adjusted based on measured values ​​relating to the down-link path, and in particular based on the signal level of the down-link path. Preferably, the gain in the respective down-link paths of the first and second signal paths can each be adjusted separately based on measured values ​​relating to the respective down-link path.

[0050] According to a third variant, the gain in the downlink path can be adjusted based on measured values ​​of the downlink path and an uplink path. In particular, the coupling attenuation can be determined by comparing the signal level of the uplink signal with a predefined value and used, together with the signal level of the downlink signal, to adjust the gain.

[0051] According to a fourth variant, the gain in the down-link path can be adjusted based on data received from the mobile terminal regarding a received signal level measured by the mobile terminal, and in particular by comparison with a signal level of a down-link path of the compensator. Specifically, the gain in the respective down-link paths of the first and second signal paths can be adjusted separately based on data regarding received signal levels measured by the mobile terminal for a primary and a secondary antenna connection of the mobile terminal, and preferably on measured values ​​for the respective down-link path.

[0052] According to a fifth variant, the gain in the uplink path can be adjusted based on data received from the mobile terminal regarding the transmit power output of the mobile terminal, and preferably in comparison to measured values ​​of the uplink path, and in particular in comparison to a signal level of the uplink path of the compensator. The gain in the uplink path can be adjusted based on data received from the mobile terminal regarding a transmit signal level measured by the mobile terminal at a primary antenna connection. Preferably, the gain is applied only in the uplink path of the first signal path, while no gain is applied to the uplink signal in the second signal path.

[0053] The data received by the mobile device can be in the form of analog and / or digital data, preferably in the form of digital data via a digital communication channel. The communication interface is preferably a data interface.

[0054] Furthermore, according to the invention, several different methods can be provided for adjusting the gain in the compensator, wherein the compensator selects at least one method based on operating conditions. The selectable methods implemented in the compensator can be the variants described above.

[0055] Preferably, the selection in the compensator is based on the mobile device type and / or on a check to see whether data can be received from the mobile device or not.

[0056] In addition to the compensator according to the invention, the present invention further comprises a system for wirelessly coupling a mobile communication device to an external antenna structure, comprising a compensator according to the first and / or second aspect of the present invention as described in more detail above, and a coupling structure for wirelessly coupling to an antenna structure of a mobile communication device. The first signal path of the compensator is connected to and / or connectable with at least one first connection of the coupling structure.

[0057] In particular, the system according to the invention can serve to connect the mobile communication device to an external vehicle antenna structure.

[0058] Preferably, the coupling structure has at least two connections, wherein the compensator according to the invention is preferably connected to the at least two connections of the coupling structure.

[0059] The coupling structure according to the invention, with at least two connections, can be configured in a variety of ways. In particular, it can be a continuous coupling structure that nevertheless has two spatially separated connections. The introduction and extraction of signals at different positions within the coupling structure can already result in significantly different coupling qualities when connecting to the antenna structure of the mobile communication device. In other possible configurations, the coupling structure has separate and / or spatially separated coupling elements, each with at least one connection. The coupling structure preferably enables connection to several different antennas of a mobile communication device, and especially of a mobile phone.

[0060] In one possible embodiment of the system according to the invention, it further comprises a connection unit which connects the first signal path of the compensator to one of the at least two terminals of the coupling structure, depending on the coupling quality. In particular, the connection unit can connect the terminal of the coupling structure with the better coupling quality to the first signal path of the compensator. If more than two terminals are provided, the terminal with the best coupling quality is preferably connected to the first signal path. In particular, it can be provided that the terminal of the coupling structure with the better coupling quality with regard to the uplink signals of the mobile communication device is always connected to the first signal path of the compensator.This optimally supports a compensator according to the invention, in which, according to a preferred embodiment, amplification of the up-link signals only takes place in the first signal path.

[0061] In one possible embodiment, the connection unit can evaluate the coupling quality between the antenna structure of the mobile communication device and the at least two connections of the coupling structure during normal communication operation of the mobile communication device and / or continuously and / or for both connections simultaneously and / or during transmission operation of the mobile communication device. In particular, this ensures that the connection with the best coupling quality is always connected to the first signal path.

[0062] If the compensator has two signal paths, the connecting unit preferably connects at least two terminals of the coupling structure to the first and second signal paths of the compensator. Preferably, the at least two terminals of the coupling structure are connected separately to the first and second signal paths of the compensator via the connecting unit.

[0063] In particular, the connection unit can connect the first signal path and the second signal path of the compensator to a terminal of the coupling structure, and especially connect them separately to a terminal of the coupling structure. This supports the MIMO functionality according to the invention.

[0064] Preferably, the connection to the first signal path can be made based on the coupling quality as described above, with the connection point having the best coupling quality being preferably connected to the first signal path. The second signal path can be connected to a connection point of the coupling structure with the second-best coupling quality, or to a connection point that fulfills a MIMO criterion with respect to the connection point of the coupling structure connected to the first signal path and, in particular, provides the best MIMO functionality. From a technical perspective, the connection point with the second-best coupling quality does not necessarily have to deliver the best performance for MIMO operation. Therefore, a predefined assignment of the connection point of the coupling structure to the second signal path is conceivable, depending on the connection point with the best coupling quality that is connected to the first signal path. This could, for example,The connection with the greatest spatial distance (relative to the respective coupling area) to the connection with the best coupling quality should always be the one with the greatest spatial distance. This fixed assignment could be implemented using logic circuits or a lookup table.

[0065] The coupling structure can be arranged in the area of ​​a support and / or receptacle for the mobile communication device. In particular, the mobile communication device can be placed in any position, at least within a support and / or receptacle area. Preferably, a transmitting and / or receiving unit and / or an antenna for a wireless communication interface with the mobile communication device is provided in the support and / or receptacle area.

[0066] Preferably, the compensator is connected to the transmitting and / or receiving unit and / or the antenna via a signal line to provide a communication channel with the mobile communication device. In particular, a wireless communication interface already provided in the area of ​​the receiver and / or mounting can be used. The signal line connecting the compensator to the transmitting and / or receiving unit and / or the antenna for the wireless communication interface can, in particular, be used to connect the compensator to a port of the coupling structure, for example, by frequency separation of the corresponding signals. If necessary, however, a separate signal line can also be used.

[0067] The present invention will now be described in more detail with reference to an exemplary embodiment and drawings.

[0068] This shows: Fig. 1: An embodiment of a system according to the invention with an embodiment of a compensator according to the first aspect of the present invention in a schematic representation, Fig. 2: a block diagram of the construction of an embodiment of a compensator according to the first aspect of the present invention, Fig. 3: an embodiment of a system and a compensator according to the first and second aspects of the present invention in a schematic representation, Fig. 4: a further embodiment of a system of a compensator according to the invention in accordance with the first and second aspects of the present invention in a schematic representation and Fig. 5: a block diagram of the construction of a compensator according to the first and second aspects of the present invention.

[0069] In Fig. Figure 1 shows an embodiment of a system according to the invention, comprising a coupling structure 20, a connection unit 30, and an embodiment of a compensator 40 according to the invention. The system according to the invention serves to couple a mobile communication terminal 10, in this embodiment a mobile phone, to a first external antenna 50 and a second external antenna 60 of an external antenna system. The first external antenna 50 can be a primary external antenna, and the second external antenna can be a secondary external antenna.

[0070] The first and second external antennas can, in particular, be the first and second external vehicle antennas of an external vehicle antenna structure. The first and second external antennas can, for example, be part of a vehicle roof antenna structure. However, the external antenna structure can also be a distributed structure, such that, for example, one external antenna is designed as a roof antenna and the other is located in the area of ​​a side mirror.

[0071] The coupling structure 20 serves for wireless coupling to an antenna structure of the mobile communication device 10, thereby enabling the transmission of mobile radio frequency signals between the mobile communication device 10 and the first external antenna 50 and second external antenna 60. For this purpose, the coupling structure has at least two connections 21 and 22. In the exemplary embodiment, the coupling structure 20 has two coupling elements 23 and 24 arranged in the area of ​​the mounting and / or support 25, each of which is contacted via a connection 21 and 22, respectively. Alternatively, the coupling structure can also have a spatially connected coupling element that is contacted at two different, spatially separated locations via connections 21 and 22.

[0072] The coupling structure 20 is typically arranged in the area of ​​a receptacle and / or storage area 25 for the mobile communication device 10, wherein the receptacle and / or storage area 25 is typically located in the vehicle interior, for example in the area of ​​a center console. Preferably, the mobile communication device can be placed in any position within the receptacle and / or storage area.

[0073] The compensator 40 according to the invention has a first signal path 41 for connection to the first external antenna 50, and a second separate signal path 42 for connection to the second external antenna 60. The first signal path 41 has a connection 44 for connection to the first external antenna 50, the connection being made via a signal line 37. The second signal path has a connection 46 for connection to the second external antenna 60, the connection being made via the signal line 38. The signal lines 37 and 38 can be coaxial lines, and the connections 44 and 46 can be coaxial connecting elements, in particular coaxial sockets and / or plugs.

[0074] The compensator 40 according to the invention further comprises two terminals 43 and 45 for connection to the coupling structure 20. The at least two terminals 21 and 22 of the coupling structure 20 are connected via a connecting unit 30 to the two terminals 43 and 45 of the first and second signal paths of the compensator 40 according to the invention.

[0075] The terminal 43 of the compensator is assigned to the first signal path 41, and the terminal 45 to the second signal path 42. In the exemplary embodiment, the connection between the coupling structure 20 or the connecting unit 30 and the compensator 40 according to the invention is again made via signal lines 35 and 36, which are connected to the terminals 43 and 45 of the compensator. Here too, the signal lines 35 and 36 can be coaxial lines, and the terminals 43 and 45 can be coaxial connecting elements, in particular coaxial sockets and / or plugs. In the exemplary embodiment, the connecting unit 30 is integrated into the coupling structure 20 and has terminals 33 and 34, which are connected to the terminals 43 and 45 of the compensator 40 via the connecting lines 35 and 36.

[0076] In the exemplary embodiment, the connection unit 30 is designed such that it determines the coupling quality of the connections 21 and 22 of the coupling structure 20 to the antenna structure of the mobile communication terminal 10 and establishes the connection between the first and second connections of the coupling structure and the two connections 43 and 45 of the compensator 40 based on this coupling quality.

[0077] In one possible embodiment of the present invention, the connection unit can determine the coupling quality during the ongoing mobile communication operation of the mobile communication device. The coupling quality is preferably determined continuously and / or simultaneously for both connections 21 and 22. This ensures that optimal coupling to the mobile communication device is achieved for the respective mobile communication frequency band and / or mobile communication operating mode used, and that the device can be placed in essentially any position and moved during operation while still maintaining good coupling.

[0078] Preferably, the coupling quality is evaluated by the connection unit 30 with regard to the uplink signal of the mobile communication device, i.e., based on the transmit signal of the mobile communication device. Preferably, the connection of the coupling structure with the best coupling quality with regard to the uplink signal is connected to the first signal path 41 of the compensator. Since only two connections of the coupling structure are available in the exemplary embodiment, the other connection is always connected to the second signal path 42.

[0079] If the coupling structure has more than two connections, the selection of the connection that is connected to the second signal path can be made based on the coupling quality and / or on a MIMO criterion depending on the connection connected to the first signal path 41, in particular to provide the best possible MIMO functionality.

[0080] With current mobile communication standards, and especially with LTE, mobile devices only have MIMO functionality in the downlink, meaning they receive mobile signals via a primary and a secondary antenna. The uplink, i.e., the transmission of mobile signals, occurs only via the primary antenna. The connection unit 30 ensures that the uplink signals transmitted by the primary antenna are transferred to the first external antenna via the first signal path 41. The amplifier provided in the first signal path compensates for coupling losses during the connection of the mobile device and / or line losses. The first signal path 41 also provides amplification of the downlink signals.In contrast, the second signal path 42 of the compensator does not provide amplification of up-link signals, but supports the MIMO functionality in the down-link by amplifying the down-link signals.

[0081] As in Fig. As already indicated in Section 1, the first signal path 41 of the compensator according to the invention thus has a different signal processing configuration than the second signal path 42. In particular, it is provided that the first signal path 41 amplifies both uplink and downlink signals. The second signal path 42, on the other hand, only amplifies downlink signals. This allows the compensator according to the invention to be designed considerably more simply in this preferred embodiment than if both signal paths had to provide the same functionality. Nevertheless, the MIMO functionality is fully supported in the downlink.

[0082] The compensator according to the invention with two separate signal paths 41 and 42 for connection to a first and second external antenna can, however, not only be used in the case described in Fig. The embodiment of a system according to the invention shown in Figure 1 is used. Rather, a compensator according to the invention could also be used if the connecting unit 30 were omitted, and the two terminals 43 and 45 of the compensator 40 were permanently connected to two terminals 21 and 22 of a coupling structure, and / or if the connecting unit 30 were designed differently.

[0083] The compensator according to the invention is used in such an arrangement, in which it is connected to a coupling structure for wireless connection with a mobile communication device, in particular to compensate for coupling losses when coupling the antenna structure of the mobile communication device to the coupling structure, as well as to compensate for line losses.

[0084] The compensator according to the invention can also be used in other applications, for example, in connecting a mobile communication device installed in a motor vehicle to the vehicle's external antenna structure. In particular, the compensator can serve to compensate for line losses when connecting a vehicle's head unit to the external vehicle antenna structure. The head unit can, in particular, provide a data connection for the vehicle via a mobile network. In this application, the compensator, with its two signal paths, is preferably connected to a primary and a secondary antenna output of the mobile communication device via signal lines.

[0085] In Fig. Figure 2 is a simplified block diagram of an embodiment of a compensator according to the invention, as described in the first aspect, i.e., with two separate signal paths 41 and 42. The first signal path 41, consisting of two partial signal paths 41' and 41" and connecting terminal 43 to terminal 44, is shown at the top of the block diagram. The second signal path 42, consisting of a single signal path and connecting terminal 45 to terminal 46, is shown at the bottom.

[0086] The first signal path 41 has arrangements A1 and A2 at its input on both sides for separating the uplink and downlink signals. The first signal path is thus divided by these two signal separation arrangements into a first sub-signal path 41' for the uplink signals and a second sub-signal path 41" for the downlink signals. Depending on the active mobile communication technology, the signal separation is performed either by frequency (e.g., UMTS, LTE FDD) or time (LTE TDD).

[0087] Along the two partial signal paths 41' and 41" arrangements for signal extraction (B1 in the up-link signal path 41' and B2 in the down-link signal path 41") are provided, which extract a partial signal from the respective signal path and supply it to a power measurement C1 or C2.

[0088] The second signal path 42 has a similar structure to the down-link signal path 41' of the first signal path. However, instead of signal separation devices, only adjustable filter structures E1 and E2 are provided at the input and output, which select the frequency band. Time-based signal separation is not required, as there is no separation into sub-signal paths for the up-link and down-link signals.

[0089] The second signal path 42 can optionally also include a signal extraction arrangement B3, which feeds a partial signal to a power measurement C3. This allows the received power (including RSSI) to be optionally measured in the active frequency band.

[0090] The first two sub-signal paths 41' and 41" each contain adjustable amplifier circuits D1 and D2, respectively, while the second signal path 42 contains an adjustable amplifier circuit D3. Amplifier circuit D1 in the up-link sub-signal path 41 of the first signal path is a power amplifier, while amplifier circuits D2 and D3 in their respective down-link signal paths are low-noise amplifiers (LNAs).

[0091] The analysis of the signals and the control of the individual components in the first and second signal paths are carried out by the controller F. This controller has, for example, the following functionalities: The controller F detects the currently active mobile communication mode and, in particular, the currently active mobile communication method (e.g., GSM / UMTS / LTE) and the currently active mobile communication frequency band based on the uplink signal extracted from the uplink sub-signal path 41' of the first signal path 41. The extraction and power measurement are performed via components B1 and C1.

[0092] The controller F, based on the active mobile communication method and / or the active mobile communication frequency band, controls both the signal separation arrangement A1 and A2 and the adjustable filter structures E1 and E2. Furthermore, the controller F can be configured to switch off the second signal path 42 if the currently active mobile communication method does not support MIMO, i.e., if, for example, mobile communication is currently taking place via GSM. This prevents interference at the mobile communication device.

[0093] Furthermore, the control unit F performs a power evaluation of at least the uplink signal in the uplink sub-signal path 41' of the first signal path, and preferably also in the two downlink signal paths 41" and 42. The control unit also adjusts the gain in both the uplink and downlink directions. In particular, amplifiers D1, D2, and D3 are controlled by the control unit F.

[0094] Various methods for determining and adjusting the gain are conceivable, which are carried out automatically by the controller F. Possible methods for gain adjustment in the case of the Fig. In the exemplary embodiment shown in section 2, the following two methods are conceivable, among others: 1. The coupling loss can be estimated by comparing the signal level of the uplink signal with an expected transmit signal level of the mobile device and compensated for, at least in the uplink, by adjusting the gain accordingly. Furthermore, the gain in the two downlink paths can be adjusted depending on the gain in the uplink path, and in particular with the same or similar values ​​as in the uplink path, while adhering to normative requirements. Specifically, the gain in the uplink subpath 41 can be set identically to the gain in the downlink subpath 41" of the first signal path and / or the gain in the second signal path 42. 2. The gains in the two downlink paths can be adjusted based on the measured received power values ​​(via B2 / C2 and B3 / C3) from the external antennas 50 and 60, in compliance with normative specifications. In particular, the measured levels of the downlink signals can be compared with the desired levels, and the gains adjusted accordingly. Alternatively, if necessary, the gains in the two downlink paths can also be adjusted solely by measuring the power in downlink path 41" of the first signal path. The uplink gain can be adjusted as described in option 1. 3. Furthermore, a combination of the methods described in points 1 and 2 can be implemented such that the coupling loss is determined by comparing the signal level in the uplink with an expected signal level, whereby the gain in the uplink path is directly adjusted to compensate for the coupling loss, and for the gain in the two downlink paths, the levels of the received signals are additionally measured and incorporated into the adjustment of the gain together with the coupling loss. In particular, this allows not only the coupling loss but also potentially weak reception conditions to be compensated for.

[0095] Furthermore, it is conceivable to adjust the gain based on additional data provided by the mobile communication device. For this purpose, the compensator preferably has a communication interface for establishing a communication channel with the mobile communication device, as described in more detail below. The following methods, in particular, can be used as further methods for adjusting the gain: 4. The downlink gains can be adjusted based on the received power values ​​measured in the compensator (via B2 / C2 and B3 / C3) and additional information from the mobile terminal regarding the received signal levels measured by the terminal. Specifically, the mobile terminal can measure the received signal level for a first and second antenna, particularly a primary and a secondary antenna. This data is then read from the compensator and used to adjust the respective gains in the two downlink paths. The uplink gain, on the other hand, can be adjusted as described above under Option 1. 5. The adjustment of the gain in both the up-link and the gains in the two down-link paths can be based on the powers measured in the compensator (via B1 / C1, B2 / C2 and B3 / C3) and additional information from the mobile terminal about the transmit level or the measured receive levels.

[0096] The compensator may support several and / or all of the methods described above and flexibly select the appropriate method depending on the mobile device type and / or on a check to see if additional information can be provided by the mobile device. In particular, methods 4 or 5 are preferably used when information can be provided by the mobile device, while methods 1 to 3 are preferably used when no information can be provided. Preferably, the compensator supports at least one of the methods listed under 1 to 3, and at least one of the methods listed under 4 and 5.

[0097] As mentioned above, the implementation of procedures 4 and 5 requires a communication channel between the compensator and the mobile communication device.

[0098] In Fig. Figure 3 now shows an embodiment of a system according to the invention and of a compensator according to the second aspect of the present invention, wherein the compensator has a communication interface 71 for providing a communication channel 70 with a mobile communication terminal 10.

[0099] The communication interface of the compensator 40 according to the second aspect of the present invention is preferably a data interface for communication with the mobile communication device 10. The data received from the mobile communication device can be used to optimize the system performance of the compensator by utilizing additional information supplied by the mobile communication device, and / or to reduce the complexity of the compensator's design. In particular, information on one or more of the following values ​​can be retrieved from the mobile communication device or provided to the compensator: received level, transmitted level, active mobile communication operating mode, and / or active mobile communication frequency band.

[0100] If data on the received and / or transmitted signal levels are transmitted to the compensator, this data can be used to adjust the gain in the compensator. This is preferably done as described above.

[0101] If data on the active mobile communication operating mode and / or the active mobile communication frequency band are also transmitted to the compensator, the control of the separation arrangements for signal separation (for example in the first signal path) and / or the control of adjustable filter structures for selecting the respective active frequency band can be carried out on the basis of this data, and / or a check of the current mobile communication operating mode and / or the current mobile communication frequency band determined by the controller F on the basis of the analysis of the signals within the compensator can be carried out.

[0102] Various protocols and standards are conceivable for data transfer between the compensator and the mobile device. Depending on the application, the communication channel can be wired or wireless.

[0103] If the compensator is used to compensate for line losses when connecting a permanently installed mobile communication device in a vehicle, particularly a head unit, the communication channel between the mobile communication device and the compensator can be wired. Specifically, communication can take place via one of the signal lines used to transmit the high-frequency mobile communication signals. This communication can be separated from the high-frequency mobile communication signals by using a different frequency range.

[0104] If, on the other hand, the compensator is used to compensate for coupling losses during the wireless connection of a mobile device to a coupling structure, the communication channel is preferably also wireless. For example, communication can take place via WLAN, Bluetooth, or Near Field Communication (NFC). Various standards and / or methods for communication with the mobile device are conceivable, particularly with regard to how the corresponding data is read from the mobile device and which command set is used for this purpose.

[0105] At the in Fig. In the embodiment described in Figure 3, the compensator 40 communicates directly and wirelessly with the mobile communication device 10. For this purpose, the communication interface 71 of the compensator 40 has an antenna 72, via which the wireless communication channel 70 is established directly with the mobile communication device. Such a configuration can be used in particular when the coupling structure 20 and the compensator 40 are arranged in close proximity. Fig. In this case, the connections of the coupling structure 20 are directly coupled to the connections of the compensator 40, or via a short intermediate piece 35 and 36. It would also be conceivable to integrate the compensator into the coupling structure 20.

[0106] At the in Fig. In contrast, the embodiment described in section 4 provides that wireless communication with the mobile communication device 10 is effected by an additional device 74, which is arranged in close proximity to the coupling structure 20 and preferably in the same housing as the coupling structure 20. In modern mobile communication terminals in vehicles, so-called "cradles," additional functionalities such as wireless power charging and near-field communication (NFC) can be integrated alongside the coupling structure for pure mobile communication. According to the invention, the NFC functionality can also be used for wireless data exchange with the mobile communication device.

[0107] In this case, the coupling structure 20, and thus the mounting and / or support for the mobile communication device, can also be arranged spatially separated from the compensator 40. Preferably, communication between the arrangement 74, which provides wireless communication to the mobile communication device, and the interface 71 of the compensator 40 is wired.

[0108] At the in Fig. In the embodiment shown in Figure 4, a separate connecting line 73 is provided for this purpose. Alternatively, however, one of the coaxial cables 35 or 36, via which the high-frequency mobile communication signals are exchanged between the compensator and the coupling structure, could also be used for data transmission and for establishing communication between the interface 71 and the arrangement 74. In particular, a frequency separation from the high-frequency mobile communication signals can be implemented.

[0109] The arrangement 74, which is located in the area of ​​the coupling structure 20, can in particular be a transmitter / receiver unit with an antenna 75, which establishes the wireless communication channel 70 to the mobile communication device 10. As already explained in more detail above, WLAN, Bluetooth or Near Field Communication (NFC) can be used for wireless communication, for example. The arrangement 74 can also be used by other components in the vehicle, if necessary.

[0110] In Fig. Figure 5 shows a block diagram of a compensator 40 designed to provide a communication channel. This was merely an addition to the block diagram in Figure 5. Fig. 2, so that with regard to the already in Fig. The above representation refers to the 2 included components.

[0111] Additionally, the compensator 40 has a data interface 71, which allows bidirectional communication between the compensator's control unit F and the mobile communication device. In particular, the data interface 71 allows information to be retrieved from the mobile communication device, especially information on the received signal level, the transmitted signal level, the active mobile communication operating mode, and the active mobile communication frequency band.

[0112] In Fig. Figure 5 illustrates all three alternatives for providing the communication channel described in more detail above: In a first variant, wireless communication can take place directly between the compensator and the mobile communication device, for which the compensator is equipped with an antenna 72, which is controlled by the data interface 71. In a second variant, either the antenna or a transmit / receive unit with an antenna can be arranged separately from the compensator and communicate via a wired connection with the compensator's data interface 71. For this purpose, either a separate signal line 73 can be connected to the data interface 71, or the wired communication takes place via the connection 43 or 45, which is used for the mobile radio frequency signals. Fig. Figure 5 shows a connection 74 between data interface 71 and port 43.

[0113] The use of a data interface and communication according to the invention between the control unit F of the compensator and the mobile communication device can also be used if the compensator only has one signal path and thus only allows connection to a single external antenna.

[0114] In this case, the in Fig. In the block diagram shown in Figure 5, the second signal path 42 with the components arranged along this signal path could simply be omitted. The first signal path, however, could operate in the same way as described above in more detail with regard to the embodiment with two signal paths.

[0115] In this case, in particular, the information received from the mobile terminal 10 can be used to adjust the gain in the uplink or downlink of the first signal path, as described in more detail above for the first signal path of the first embodiment. Specifically, the gain in the downlink can be adjusted based on the received power values ​​measured in the compensator and additional information from the mobile terminal about the received level measured by the mobile terminal, and / or the gain in the uplink can be adjusted based on the power measured in the compensator in the uplink and additional information from the mobile terminal about the transmitted level. In particular, the information provided by the mobile terminal can relate to the signal levels of the mobile terminal's primary antenna.

[0116] Preferably, however, the second aspect of the present invention is used in combination with the first aspect, i.e., in a compensator with a first and a second signal path.

[0117] The present invention is not limited, in either aspect, to use with only one or only two separate signal paths. Rather, it is also conceivable to use more than two parallel signal paths to further improve the MIMO functionality.

[0118] The first aspect of the present invention extends the attenuation compensation provided by the compensator to include MIMO functionality, particularly in the downlink direction. This results in improved system performance and / or reliability.

[0119] This preferred design results in less circuit complexity, since attenuation compensation in the uplink direction always occurs in a fixed signal path. Advantageously, a suitable connection unit is used for this purpose to link to the coupling structure.

[0120] The use of a data interface according to the second aspect enables optimization of system performance through additional information from the mobile device and is preferably used in combination with the first aspect.

Claims

Compensator (40) for compensating for line and / or coupling losses when connecting a mobile communication device (10) to an external antenna structure (50, 60), in particular to an external vehicle antenna structure, wherein the compensator (40) has a first signal path (41) for connecting the mobile communication device to a first external antenna (50) of the external antenna structure (50, 60), wherein the compensator (40) has a second signal path (42) for connecting the mobile communication device to a second external antenna (60) of the external antenna structure (50, 60), characterized in that the signal processing in one of the two signal paths (41, 42) is dependent on the signal processing in the other signal path (42, 41) and / or dependent on measured values ​​determined in the other signal path (42, 41). Compensator according to claim 1 with two connections (43, 45) for connection to a coupling structure (20) for coupling to the mobile communication terminal (10) and two connections (44, 46) for connection to the first and the second external antenna (50, 60), wherein the two signal paths (41, 42) preferably each connect one of the connections (43, 45) for connection to a coupling structure and one of the connections (44, 46) for connection to an external antenna and / or wherein the two signal paths (41, 42) are preferably parallel signal paths. Compensator according to claim 1 or 2, wherein the two signal paths (41, 42) are configured differently, wherein preferably the control which adjusts the gain for the two signal paths is configured differently in the two signal paths and / or wherein preferably in the first signal path (41) gain is provided in both the up-link (41') and the down-link (41"), while in the second signal path (42) gain is provided only in the down-link or only in the up-link and preferably only in the down-link. Compensator according to one of the preceding claims, wherein the signal processing in the second signal path (42) is performed depending on the signal processing in the first signal path (41) and / or depending on measured values ​​determined in the first signal path (41), and / or wherein the frequency selection (E1, E2) and / or gain (D3) in one of the signal paths (42) is set depending on the frequency selection (A1, A2) and / or gain (D1, D2) in the other signal path (41), wherein preferably the frequency selection and / or gain in the second signal path (42) is set depending on the frequency selection and / or gain in the first signal path (41). Compensator according to one of the preceding claims, wherein the signal processing is carried out by evaluating the uplink signals (41') in at least one of the signal paths—and preferably in the first signal path (41)—and wherein the currently used mobile communication operating mode and / or the currently used mobile communication frequency band is preferably determined on the basis of the uplink signals (41') and is used to control the signal processing and in particular the frequency selection (E1, E2) and / or signal separation (A1, A2), and / or wherein the frequency selection (E1, E2) in the second signal path (42) is set depending on a currently used mobile communication operating mode and / or a currently used mobile communication frequency band determined in the first signal path (41), and / or wherein the gain (D3) in the second signal path (42) is set depending on a currently used mobile communication operating mode.wherein the second signal path (42) is preferably switched on or off depending on the currently used mobile communication operating mode. Compensator (40) for compensating for line and / or coupling losses when connecting a mobile communication terminal (10) to an external antenna structure (50), in particular to an external vehicle antenna structure, wherein the compensator (40) has a first signal path (41) for connecting the mobile communication terminal to a first external antenna (50) of the external antenna structure (50), characterized in that the compensator (40) has a communication interface (71) via which a communication channel (70) with the mobile communication terminal (10) can be established. Compensator according to claim 6, wherein the signal processing in the first signal path (41) is adjusted depending on data which the compensator (40) receives from the mobile communication terminal (10) via the communication channel (70), wherein the data preferably includes data on the currently used mobile communication operating mode and / or the currently used mobile communication frequency band and / or the current transmit level and / or the current receive level of the mobile communication terminal, and / or wherein a signal path separation (A1, A2) and / or a frequency selection (E1, E2) and / or an amplification (D1, D2, D3) is adjusted depending on data which the compensator receives from the mobile communication terminal via the communication channel (70). Compensator according to claim 6 or 7, wherein the communication channel (70) is a wireless communication channel, in particular NFC, Bluetooth and / or WLAN, and / or wherein the compensator is preferably connected to a transmit and / or receive unit (74) and / or antenna (75) for the wireless communication channel via a signal line (35, 73), and / or wherein a connection (43) of the compensator for coupling the first signal path (41) of the compensator to the mobile terminal (10) is also used for communication with the transmit and / or receive unit (74) and / or antenna (75). Compensator according to one of claims 6 to 8, wherein the compensator has a second signal path (42) for connecting the mobile communication terminal to a second external antenna (60) of the external antenna structure (50, 60), in particular according to one of claims 1 to 5, wherein the signal processing in the two signal paths (41, 42) is set depending on data which the compensator receives from the mobile communication terminal via the communication channel (70), wherein the setting for the two signal paths (41, 42) is preferably different. Compensator according to one of the preceding claims, comprising at least one separation arrangement (A1, A2) for separating the up-link signal (41') and the down-link signal (41") in the first signal path (41), wherein preferably no separation arrangement for separating the up-link signal and the down-link signal is provided in the second signal path (42), and / or comprising a frequency selection (A1, A2, E1, E2) in the first signal path and / or in the second signal path, wherein the frequency selection (E1, E2) in the second signal path is preferably controlled depending on the first signal path, and / or comprising a measuring arrangement (B1 / C1;B2 / C2) for measuring the signal level of the up-link signal (41') and / or the down-link signal (41") in the first signal path (41) and / or with a measuring arrangement (B3 / C3) for measuring the signal level of the up-link signal and / or the down-link signal and preferably only the down-link signal in the second signal path (42) and / or with at least one amplifier (D1, D2) each for the up-link signal and the down-link signal in the first signal path (41) and / or one amplifier (D3) for the down-link signal in the second signal path (42).; Compensator according to one of the preceding claims, wherein the gain adjustment in the compensator is carried out according to at least one of the following methods: - Adjustment of the gain in the down-link path as a function of the gain and / or measured values ​​with respect to the up-link path, in particular as a function of the signal level of the up-link path, wherein preferably the adjustment of the gain in the down-link paths of the first and the second signal path is carried out as a function of the gain and / or measured values ​​with respect to the up-link path of the first signal path; - Adjustment of the gain in the down-link path as a function of measured values ​​with respect to the down-link path, in particular as a function of the signal level of the down-link path, wherein preferably the adjustment of the gain in the down-link paths of the first and the second signal path is carried out separately as a function of measured values ​​for the respective down-link path;- Adjustment of the gain in the down-link path depending on measured values ​​relating to the down-link path and an up-link path, wherein the coupling attenuation is preferably determined by comparing the signal level of the up-link signal with a predetermined value, and is used together with the signal level of the down-link signal to adjust the gain; - Adjustment of the gain in the down-link path depending on data received from the mobile terminal device regarding a received level measured by the mobile terminal device and preferably further depending on the signal level in the down-link path of the compensator, wherein the adjustment of the gain in the down-link paths of the first and the second signal path is preferably carried out separately depending on data on received levels measured by the mobile terminal device for a primary and a secondary antenna connection of the mobile terminal device and preferably measured values ​​for the respective down-link path;- Adjusting the gain in the uplink path depending on data received from the mobile terminal regarding the transmit power emitted by the mobile terminal and preferably measured values ​​relating to the uplink path, in particular depending on the signal level of the uplink path, wherein preferably the gain is only applied in the uplink path of the first signal path, and / or wherein adjusting the gain in the uplink path depending on data received from the mobile terminal regarding a transmit signal level measured by the mobile terminal at a primary antenna connection. Compensator according to one of the preceding claims, wherein several different methods are provided for adjusting the gain in the compensator, and the compensator selects at least one method based on operating conditions, wherein the selection is preferably based on the type of mobile terminal device and / or the ability to obtain data from the mobile terminal device. System for wireless coupling of a mobile communication terminal (10) to an external antenna structure (50, 60), in particular to an external vehicle antenna structure, comprising a compensator (40) according to one of the preceding claims and a coupling structure (20) for wireless coupling to an antenna structure of the mobile communication terminal (10), wherein the first signal path (41) of the compensator is connected and / or connectable to at least one first connection (21, 22) of the coupling structure (20), wherein the coupling structure (20) preferably has at least two connections (21, 22). System according to claim 13, comprising a connection unit (30) which connects the first signal path (41) of the compensator (40) to one of the at least two terminals (21, 22) of the coupling structure (20) depending on the coupling quality, wherein preferably the connection unit (30) connects the terminal (21, 22) of the coupling structure (20) with the better coupling quality to the first signal path (41) of the compensator, wherein the connection unit (30) preferably evaluates the coupling quality between the antenna structure of the mobile communication device (10) and the at least two terminals (21, 22) of the coupling structure (20) during the normal communication operation of the mobile communication device (10) and / or continuously and / or for both terminals (21, 22) simultaneously and / or for the transmit operation of the mobile communication device (10), and / or wherein the connection unit (30) at least two connections (21,22) of the coupling structure (20) are connected and / or connectable to a first signal path (41) and a second signal path (42) of the compensator, wherein preferably the at least two terminals (21, 22) of the coupling structure (20) are connected and / or connectable to the first and second signal paths of the compensator (40) separately via the connection unit (30), wherein the connection unit preferably connects the first signal path (41) and the second signal path (42) of the compensator each to a terminal (21, 22) of the coupling structure, wherein the connection of the first signal path (41) is preferably based on the coupling quality and the connection of the second signal path (42) is based on the coupling quality and / or the terminal selected for the first signal path. System according to claim 13 or 14, wherein the coupling structure (20) is arranged in the area of ​​a support and / or receptacle (25) for the mobile communication device (10), wherein preferably a transmitting and / or receiving unit (74) and / or antenna (75) for a wireless communication interface with the mobile communication device (10) is provided in the area of ​​the support and / or receptacle (25), wherein the compensator (40) is preferably connected to the transmitting and / or receiving unit (74) and / or antenna (75) via a signal line (35, 73) in order to provide a communication channel (70) with the mobile communication device (10), wherein the signal line is preferably a signal line (35) for connection with a terminal (21, 22) of the coupling structure.

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