DE102014214555A1 - Radio receiver for a motor vehicle, motor vehicle, method and computer program for a radio receiver - Google Patents

Abstract

Embodiments relate to a radio receiver (10) for a motor vehicle (20), a motor vehicle (20), a method and a computer program for a radio receiver (10). The radio receiver (10) for a motor vehicle (20) comprises a receiving device (12) which is designed to provide a received signal, wherein the received signal comprises at least two transmission bands of different radio systems. The radio receiver (10) further comprises a signal processing device (14), which is designed to scan the received signal into a baseband and, based on the received signal in the baseband, to determine baseband signals for the at least two radio systems.

Description

Technical area

Embodiments relate to a radio receiver for a motor vehicle, a motor vehicle, a method and a computer program for a radio receiver, in particular, but not exclusively, having a reception concept for the combined direct scanning of transmission bands of a plurality of radio systems.

background

In the context of conventional technology, several radio systems and dedicated receivers are known, which are also used in vehicles. The various radio systems, such as e.g. Broadcasting systems, mobile radio systems, navigation systems, etc., use different transmission bands and access technologies. Relevant radio services include e.g. cellular, broadcasting, ad hoc, localization and security (also called "safety") services. For example, relevant radio services are implemented in the automotive context by multiple receivers, each via antennas with corresponding downstream high-frequency modules, which also Engl. "Radio Frequency Front Ends (RFFE)".

In these services, electromagnetic waves carrying informational content are modulated onto a high-frequency signal for wireless transmission from a transmitter to a receiver over a channel. This transmission case comprises all possible types of transmission and reception, for example from a transmitting antenna to a receiving antenna (also referred to as "single input single output (SISO)") or from several transmitting antennas to several receiving antennas (also "multiple input multiple output (MIMO). ").

Further information about reception concepts can be found, for example, in the publications DE 20 2007 009 431 U1 . EP 1 978 647 A2 and US 2009/0147898 A1 being found.

Summary

Embodiments of the present invention are based on the finding that receiver structures in a motor vehicle can be simplified if a plurality of radio signals, i. Radio signals from multiple radio systems, can be processed together. Through direct or bandpass sampling, transmission bands of multiple systems or services can be basebanded and then further processed.

Therefore, embodiments provide a radio receiver for a motor vehicle. The radio receiver comprises a receiving device, which is designed to provide a received signal, wherein the received signal comprises at least two transmission bands of different radio systems. The radio receiver further comprises a signal processing device, which is designed to scan the received signal into a baseband and to determine base band signals for the at least two radio systems based on the received signal in the baseband. Embodiments may therefore enable a simplified receiver structure since sampling in the transmission bands of multiple wireless systems can be performed in concert.

In embodiments, at least one of the radio systems may correspond to a mobile radio system, a navigation system, a terrestrial broadcasting system, a wireless local area network, WLAN, or a satellite-supported broadcasting system. In this respect, several radio services can be provided with a radio receiver in embodiments. For example, at least one of the radio systems can correspond to a mobile radio system and another of the radio systems to a broadcasting system.

In some embodiments, the receiving device may further be configured to receive a high frequency signal and to shift at least one of the at least two transmission bands in a high frequency range to obtain the received signal. In this respect, a signal preprocessing in the high frequency range take place, which allows a spectral adjustment of the transmission bands to a downstream scan, thus simplifying the receiver structure. In this case, for example, two center frequencies of the at least two transmission bands in the high-frequency signal can have a greater distance from each other than in the received signal. In other words, the transmission bands in the high-frequency range can first be moved closer to each other in order then to further process the collapsed signal. In the high-frequency signal, a highest and a lowest frequency, which are assigned to the two transmission bands, can then have a greater distance from each other in the frequency range than in the received signal. The received signal, then with lower bandwidth, can then be sampled. In some embodiments, the receiving device may include at least one mixer and at least one local oscillator for shifting the at least one transmission band in the high frequency range. In other words, an analog signal processing in the high frequency range, the can be kept relatively low cost, done before a scan.

Embodiments can thus further be based on the knowledge that a low-cost analog signal processing in the high-frequency range can be carried out in order to conveniently arrange the transmission bands of the radio systems to be received before they are then scanned in the high-frequency range. In some embodiments, the receiving means may further comprise a bandpass filter for filtering the at least one transmission band from the high frequency signal and obtaining a bandpass signal for the at least one transmission band, the receiving means being further adapted to supply the bandpass signal for the at least one transmission band in the high frequency range shift and combine with at least one other transmission band to obtain the received signal. In this respect, embodiments may allow (de) -fragmentation or (de) -partitioning of the transmission range.

The receiving device, in some embodiments, may be further configured to adjust a level of at least one of the transmission bands. This can allow an improved reception quality of the respective service. Moreover, the receiving device may be configurable with respect to the transmission bands and the shift in the high frequency range. This may allow adaptation of the radio receiver to new radio systems or transmission bands. In some embodiments, the receiving means for shifting the at least one transmission band in the high frequency range may comprise a controllable oscillator. As a result, flexibility with regard to the services in question or transmission bands can be achieved in a cost-effective manner.

The receiving device can be designed to provide the received signal as a bandpass signal and thus possibly enable a bandpass sampling. In embodiments, the radio receiver may further comprise at least one receiving antenna coupled to the receiving device, wherein the antenna is adapted to receive the at least two transmission bands of the at least two radio systems. As such, embodiments may allow for a simple implementation since only one receive antenna can be used to receive multiple radio services. In some embodiments, the receive signal in the baseband may include a bandwidth of 10 MHz or more. Embodiments may therefore provide a low cost receiver structure for a wide range of bandwidths. The signal processing means may comprise an analog-to-digital converter for basing the received signal on the baseband by sub-sampling or bandpass sampling. In this respect, embodiments can save on the complexity of conventional receivers, since expenditure for intermediate frequency ranges and parallel reception can be saved.

Embodiments also provide a motor vehicle with a radio receiver as described above. Embodiments further provide a method for a radio receiver for a motor vehicle. The method comprises providing a received signal, wherein the received signal comprises at least two transmission bands of different radio systems. The method further comprises sampling the received signal to convert the received signal to baseband and determining baseband signals for the at least two wireless systems based on the baseband receive signal.

Embodiments further provide a computer program for performing at least one of the above-described methods when the computer program runs on a computer, a processor or a programmable hardware component. Embodiments also provide a digital storage medium that is machine or computer readable and that has electronically readable control signals that can cooperate with a programmable hardware component to perform one of the methods described above.

Brief Description

Embodiments are explained below with reference to the accompanying figures. Show it:

1 an embodiment of a radio receiver;

2 an illustration of signal processing in one embodiment;

3 a representation of a spectrum in one embodiment;

4 an antenna and controller architecture in a motor vehicle;

5 a block diagram for explaining the signal processing in a super heterodyne receiver;

6 a representation of a universal air interface in one embodiment;

7 a comparison of a decentralized receiver structure and a central receiver structure in one embodiment;

8th a block diagram illustrating the signal processing in one embodiment;

9 a block diagram illustrating a partitioning in an embodiment;

10 an illustration of a possible flexibility in an embodiment;

11 a further comparison of a decentralized receiver structure and a central receiver structure in one embodiment; and

12 a flowchart of an embodiment of a method.

description

Various embodiments will now be described in more detail with reference to the accompanying drawings, in which some embodiments are illustrated. In the figures, the thickness dimensions of lines, layers and / or regions may be exaggerated for the sake of clarity.

In the following description of the attached figures, which show only some exemplary embodiments, like reference characters may designate the same or similar components. Further, summary reference numerals may be used for components and objects that occur multiple times in one embodiment or in a drawing but are described together in terms of one or more features. Components or objects which are described by the same or by the same reference numerals may be the same, but possibly also different, in terms of individual, several or all features, for example their dimensions, unless otherwise explicitly or implicitly stated in the description.

Although embodiments may be modified and changed in various ways, exemplary embodiments are illustrated in the figures as examples and will be described in detail herein. It should be understood, however, that it is not intended to limit embodiments to the particular forms disclosed, but that embodiments are intended to cover all functional and / or structural modifications, equivalents and alternatives that are within the scope of the invention. Like reference numerals designate like or similar elements throughout the description of the figures.

Note that an element referred to as being "connected" or "coupled" to another element may be directly connected or coupled to the other element, or intervening elements may be present. Conversely, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements. Other terms used to describe the relationship between elements should be interpreted in a similar manner (e.g., "between" versus "directly in between," "adjacent" versus "directly adjacent," etc.).

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the embodiments. As used herein, the singular forms "a," "a," "an," and "the" are also meant to include the plural forms unless the context clearly indicates otherwise. Furthermore, it should be understood that the terms such as e.g. "Including," "including," "having," "comprising," "comprising," and / or "having," as used herein, indicating the presence of said features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more features, integers, steps, operations, elements, components, and / or groups thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly assigned to one of ordinary skill in the art to which the embodiments pertain. Further, it should be understood that terms, e.g. those that are defined in commonly used dictionaries are to be interpreted as having the meaning consistent with their meaning in the context of the relevant art, and not to be interpreted in an idealized or overly formal sense, unless this is so is explicitly defined.

1 illustrates an embodiment of a radio receiver 10 for a motor vehicle. The radio receiver comprises a receiving device 12 adapted to provide a received signal, the received signal comprising at least two transmission bands of different radio systems. In embodiments, the receiving device may include typical receiver components contain. Among them, for example, one or more antennas 16 (or may the receiving device 12 for coupling with one or more antennas 16 be formed), one or more filters, one or more amplifiers, one or more diplexers, one or more duplexers, etc. fall. The radio receiver 10 further comprises a signal processing device 14 configured to sample the received signal into a baseband and to determine based on the baseband receive signal baseband signals for the at least two radio systems. In embodiments, the signal processing device may include one or more analog-to-digital (A / D) converters (ADCs) and one or more processors, or any controller or processor or programmable hardware component. For example, the signal processing device 14 also be partially realized as software that is programmed for a corresponding hardware component. In this respect, the signal processing device 14 be implemented as programmable hardware with appropriately adapted software. Any processors, such as digital signal processors (DSPs) can be used. Embodiments are not limited to a particular type of processor. There are any processors or even more processors for implementing signal processing device 14 conceivable.

The signals, for example received signal and signals in the transmission bands, can, viewed in the frequency domain, be in a very high range and require manipulation in order to transform the signal components into a lower frequency range. This should be based on the 2 be explained in more detail. 2 shows an illustration of the signal processing in an embodiment. The 2 puts on the left side a transmitting antenna 30 representing a transmitter. This sends signals in the form of electromagnetic waves (EM waves) to a radio receiver 20 in a motor vehicle 20 is installed. Here and below, the term "vehicle" means any means of locomotion, such as two-wheelers, cars, buses, trains, airplanes, ships, etc. The radio receiver 10 , or its receiving device 12 , is with a receiving antenna 16 coupled. In general, the radio receiver 10 in embodiments at least one receiving antenna 16 include, with the receiving device 12 is coupled. The receiving antenna 16 may be configured to receive the at least two transmission bands of the at least two radio systems. In the considered embodiment of the 2 has the receiving antenna 16 a plurality of antenna elements and is designed to receive a plurality of received signals, also known as MIMO receiving antenna.

As the 2 shows the radio receiver receives 10 a high-frequency signal (RF signal) and converts this into one or more baseband signals (BB signal). In the high frequency range, it can be critical to digitally evaluate and process the signals. The signal conversion is done by the radio receiver 10 , which is also called system component high-frequency front end (also called "Radio Frequency Front End (RFFE)) realizes.

The 3 illustrates a representation of several bands S ₁ , S ₂ ,..., S _n as baseband signals and associated transmission band signals. 3 shows a representation of the respective amplitudes over the frequency f in GHz. By way of example, the signals in the transmission band are arranged in a range of 0.690 to 6 GHz, and it can be seen that the signals in the transmission range are in the form of spaced-apart bandpass signals whose bandwidths add up to a total bandwidth in the baseband, like the arrow in FIG 3 suggests. It is assumed that the individual bands in the baseband range directly adjoin one another, as in the 3 is shown.

After a variety of services to be offered to the vehicle user, the vehicle could 20 (the sink in the telecommunications sense) in the conventional sense, a group of decentralized antennas according to the physical properties of the services and the following include a group of decentralized RFFEs. For the individual sub-components (antenna or RFFE), multiple regional variants result, which can be attributed to different technical boundary conditions as well as frequency-regulatory requirements in the respective target markets.

The manipulation of the frequency components is conventionally multi-level (via intermediate frequencies), in order to arrive at the end in a low frequency range (baseband). Status quo is a variety of decentralized RFFE controllers and antennas. It is a variety of components to be integrated. This should be based on the 4 be made clearer. 4 shows an antenna and controller architecture in a motor vehicle. In the conventional arrangement, there are several roof and window antennas, in total eg 20 antennas, with associated chipsets, in total eg 8 chipsets, which are coupled to the roof and / or window antennas. Overall, several receivers are thus formed for different radio systems, eg for broadcasting such as AM amplitude modulation (AM), frequency modulation (FM), digital audio broadcasting (DAB), digital video broadcast terrestrial (DVB-T), mobile radio systems of the 2. Generation (2G), 3rd Generation (3G) and 4th Generation (4G), Wireless Fidelity (WiFi), Intelligent Transport Systems Generation 5 (IST-5G), Global Navigation Satellite System (GNSS), Satellite Digital Audio Radio Services (SDARS), etc.

The conventional antennas are usually narrow-band or limited multiband-capable single radiator. Within the RFFEs, conventional frequency conversion approaches such as an n-type super heterodyne receiver are mostly used. 5 illustrates a block diagram for explaining signal processing in a super heterodyne receiver. This radio signals are initially from a receiving antenna 100 received and through a bandpass filter 102 (BP filter) filtered before the received signal by means of an RF amplifier 104 is reinforced. The amplified received signal is then a mixer 106 supplied with a local oscillator 108 (also Engl. "Voltage Controlled Oscillator (VCO)") is coupled. The mixed signal then becomes an image bandpass filter for image rejection 110 fed and the bandpass filtered signal again through another RF amplifier 112 strengthened. The components mixer 106 , Local oscillator 108 , another bandpass filter 110 and RF amplifiers 112 can do it in one step 114 be summarized, which outputs an intermediate frequency signal. That from the stage 114 output signal then passes through one or more other signal processing stages 116 . 118 , denoted by 1, 2, ..., n here as an example. The last stage 118 that have the same components as the first stage 114 is designed for the corresponding implementation to the last intermediate frequency or in the baseband. A demodulator 120 then demodulates the signal and a low frequency amplifier (LF amplifier) 122 then amplifies the baseband signal thus obtained.

This type of conventional receiver works for a system because the components are narrowband - multi-standard capability is not given. At the same time, this means that an RFFE can only be used in one market region. Due to the large number of components required for implementation, there is also an increased susceptibility to errors. In addition, there is an oversupply of hardware that is not used efficiently. Each service is assigned an RFFE so that RFFE hardware corresponding to temporary reduced usage of the services is idle.

The rigid structure in a variety of existing RFFEs, which is reflected by precisely tuned components (e.g., filters, mixers, local ozillators, etc.) for a particular service, presents a number of disadvantages. The ongoing harmonization of global frequencies, such as recommendations from the upcoming World Radiocommunication Conference 2015 of the International Telecommunication Union (ITU), is repartitioning the frequency plan. This results in regulatory obligations (in Germany implemented by the Federal Network Agency) liabilities, which must be complied with by law. In concrete terms, this means that services can be allocated new frequencies, which, due to the lack of flexibility of conventional RFFEs, can render them unusable and completely replace them with new ones to ensure connectivity. At the same time, it is noticeable that the lifetime of a vehicle is significantly greater than the lifetime of a mobile radio standard. With the increase in mobility services integrated into the vehicle, efficient vehicle networking can be essential.

Also in the production of the vehicle results in the inflexible decentralized RFFE hardware, a considerable overhead in terms of installation. Because different frequency translations of the services are necessary for different regions of the world, on the one hand for all these cases a special RFFE has to be produced and on the other hand the correct RFFEs have to be built into it depending on the delivery of the vehicle. By using a decentralized networking architecture, multiple ECUs / RFFEs are used by a variety of suppliers. The car manufacturer appears at this point as a system integrator. The parallel use of multiple controllers / RFFEs operating independently of one another may result in interference situations, such as Long Term Evolution (LTE) and DVB-T. Since the controllers / RFFEs work independently and no centrally coordinated radio resource management takes place, these interferences are difficult or costly to be resolved.

Embodiments therefore provide the radio receiver described above 10 ready, which can realize a central universal air interface. 6 shows a representation of a universal air interface in one embodiment. The 6 shows that in this embodiment, the air interface can be operated via a plurality of receiving antennas, here in total, for example 11 Antennas. The received signals become the receiving device 12 , which is designed here as a broadband RFFE with about 10MHz bandwidth supplied. In other words, the received signal in the baseband may include a bandwidth of 10 MHz or more. The signal processing device 14 then processes the signals digitally and provides baseband signals for the at least two radio systems. As already described above, the several various radio systems in embodiments by the radio receiver 10 be received. For example, at least one of the radio systems can be a mobile radio system, a navigation system, a terrestrial broadcasting system, a wireless local area network, WLAN, a car-to-car communication system (for example a system for the ad-hoc communication between vehicles), or a satellite-based broadcasting system. For example, at least one of the radio systems may correspond to a mobile radio system and another of the radio systems to a broadcasting system.

7 illustrates a comparison of a decentralized receiver structure and a central receiver structure in one embodiment. A central architecture can enable a more cost-effective implementation of hybrid radio resource management. The 7 shows on the left a decentralized architecture with several glass and roof antennas for the different radio systems. The various antennas are coupled to a plurality of receivers or control units (also called "electronic control unit (ECU)"). The individual control units are coupled to a display unit (also called "head unit (HU)"), which represents any information, such as set radio stations, reception level information or navigation information. The individual ECUs are assigned to the functions, ie the reception of the respective radio service. The individual receiving systems coexist, are independent of each other, and may possibly interfere with each other. Overall, the complexity is relatively high and increased effort is needed to integrate the various systems into the vehicle.

The 7 shows right an embodiment of a vehicle 20 with an embodiment of the radio receiver 10 who with the HU 124 is coupled. The receiving device 12 is with a broadband antenna 16 coupled to receive the two or more radio systems, for example, for receiving high frequency signals in a range of 690MHz to 6GHz. In general, the radio receiver 10 in embodiments at least one receiving antenna 16 include, with the receiving device 12 is coupled. The receiving antenna 16 may be configured to receive the at least two transmission bands of the at least two radio systems. In some embodiments, the central platform of the radio receiver 10 allow access to all relevant network interfaces. The radio receiver 10 can provide increased flexibility and be designed for broadband reception and frequency agile. Due to the central architecture, at least in some embodiments, an active load and network management can be made possible.

The system used in the 7 is a multi-system antenna 16 (broadband) as well as a central transceiver or radio receiver 10 which can process the complete spectrum with the relevant services on a physical level. In some embodiments, on the one hand, a sophisticated system implementation can be used to generate a reduced or minimal architecture and, on the other hand, intelligent signal conditioning and processing can be carried out.

The essential characteristics of such a central RFFE 10 are reconfigurability as well as frequency agility to provide the necessary functions. It is therefore also referred to as reconfigurable RFFE (RRFFE). One possible implementation is based on a sample / digitization close to the base of the antenna 16 , For this purpose, the radio receiver may, for example, use direct sampling, subsampling or bandpass sampling. The RFFE 10 In the ideal case, ie in some embodiments, it can be realized by a minimal architecture consisting of a low-noise reception amplifier 12a and bandpass filters 12b as receiving device 12 , and an analog-to-digital converter 14 (Also English "analog-to-digital converter (ADC)") as a signal processing device 14 like this in the 8th is shown. 8th shows a block diagram illustrating the signal processing in one embodiment. The receiving device 12 is configured to provide the received signal as a bandpass signal. In addition, the signal processing device comprises 14 an analog-to-digital converter for sub-sampling or bandpass sampling the receive signal to baseband.

By suitable scanning methods, e.g. Direct sampling or subsampling, which takes into account higher Nyquist zones, is possible in some embodiments digitizing. One possible implementation is based on the bandpass sampling of the signals. This can result in a significant reduction in hardware.

Depending on the performance of the two components, the complete services can be implemented with just one architecture. The minimum sampling frequency f _{s of} the spectrum is no longer f _s > 2f _max with the highest occurring in all services frequency f _max , but only f _s > 2B with the total bandwidth B, which is composed by adding the single bandwidths of the services. This can result in a reduction of the sampling frequency in the context of signal processing in the GHz range and can be exploited in exemplary embodiments. An algorithm for calculating valid minimum sampling frequencies with respect to imposed boundary conditions may allow influencing the robustness of the frequency conversion. Depending on the use of different conductive components, a corresponding sampling frequency can be found.

In some embodiments, when limited by the hardware, intelligent partitioning of the services may take place, similar to the superheterodyne concept. However, with the advantage of a reduced hardware usage, because the implementation is avoided on intermediate frequencies and the guaranteed flexibility with respect to the parallel reception of different services. In partitioning, the dynamics and coexistence of the signals to each other can be taken into account. 9 illustrates an embodiment with partitioning that accommodates analog preprocessing for spectrum aggregation and level matching. 9 shows a further embodiment of a radio receiver 10 with a receiving antenna 16 , a receiving device 12 and a signal processing device 14 ,

In the embodiment of 9 is the receiving device 12 further configured to receive a high frequency signal and to shift at least one of the at least two transmission bands in a high frequency range to obtain the received signal. In the reception facility 12 There is a multiband spectrum aggregation by means of analog downwards mixing. The receiving device 12 includes a multiplexer 12c which distributes the high-frequency signal to, for example, three paths. The embodiment of 9 shows as an example a division into three paths for three transmission bands bands I, II and III. In other embodiments, only two or any other number of bands are conceivable. In 9 It is assumed that band I is at frequencies f <f _{g, 1} , band II at frequencies f _{g, 1} <f <f _{g, 2} and band III at frequencies f _{g, 2} <f <f _{g, 3} , with f _{g, 1} <f _{g, 2} <f _{g, 3} , refers.

9 shows in the path for Band I a bandpass filter 12DI , which first converts the signal into a bandpass signal, before it by means of a receive amplifier 12ai amplified and again through a bandpass filter 12Bi is filtered. In the path for Band II, the signal is also first bandpass filtered 12dII before passing through a receiving amplifier 12aii a level adjustment is performed. The level adjustment can be done here relative to the signals of the other paths. In other words, in this embodiment, the receiving device 12 configured to adjust a level of at least one of the transmission bands. The level adjusted signal then becomes a mixer 12eII supplied with a local oscillator 12fII which provides a harmonic signal with the frequency f _{LO, 1 is} mixed with the level-adjusted signal. The output of the mixer 12bii is then another bandpass filter 12bii downstream, which suppresses game frequencies. The path for band III is accordingly with bandpass filter 12dIII , Receiver amplifier 12aIII , Mixer 12eIII , Local oscillator 12fIII with frequency f _{LO, 2} and bandpass filter 12bIII built up. The frequencies f _{LO, 1} , f _{LO, 2 of} the local oscillators 12fII and 12fIII are adapted to the corresponding bands.

The bands II and III are therefore shifted in the frequency domain. The output signals of the individual paths are then combined with a summation element 12g to the actual received signal for the signal processing device 14 added up and the signal processing device 14 made available. Two center frequencies of the at least two transmission bands (eg Band I and II, Band II and III or Band I and II) have a greater distance in the high-frequency signal than in the received signal. The total bandwidth of the signal to be processed for the signal processing device 14 was thus reduced. In the high-frequency signal, a highest and a lowest frequency associated with the two transmission bands (eg Band I and II, Band II and III or Band I and II) have a greater distance from one another in the frequency range than in the received signal.

In other words, the receiving device comprises 12 at least one mixer here 12eII . 12eIII and at least one local oscillator 12fII . 12fIII to shift the at least one transmission band in the high frequency range. The receiving device 12 also has a bandpass filter 12DI . 12dII . 12dIII , to filter out the at least one transmission band from the high frequency signal and to obtain a bandpass signal for the at least one transmission band. The receiving device 12 is further configured to shift the bandpass signal for the at least one transmission band in the high frequency range and to combine it with at least one other transmission band (summing element 12g ) to receive the received signal.

The signal processing device 14 includes another bandpass filter 14b and an ADC 14a for bandpass sampling, we also talk about down-aliasing or super-Nyquist sampling. In the embodiment of 9 First, a selective division into several paths (bands I, II, III) takes place in the sense of partitioning. Subsequently, a level adjustment (receive amplifier 12ai . 12aii . 12aii ), Adjustment of the center frequency (mixer 12eII . 12eII and local oscillators 12fII . 12fIII ), Band limitation ( 12Bi . 12bii . 12bIII . 14b ) as well as digitization ( 14a ).

The flexibility of the RFFE 10 includes on the one hand the service change. This changes the composition of the frequency aggregation. On the other hand, the number of parallel services received can vary. Or a service is assigned a new frequency, either through a regulatory reorientation or a relocation with a different frequency plan. All this can be taken into account by newly calculated sampling frequencies, taking into account the component parameters, which are finally used by the ADC 14a can be adjusted.

The intelligent digitization through a central, reconfigurable and frequency agile RFFE 10 , which can process all signals in real time with a reduced or even minimal architecture, enables near-frequency conversion with low signal power losses through a short electrical path to the RRFFE 10 , The receiving device 12 is configurable with respect to the transmission bands and the shift in the high frequency range. In the embodiment of 9 includes the receiving device 12 for shifting the at least one transmission band in the high-frequency range, a controllable oscillator ( 12fII . 12fIII ). The controllability is implemented there via the adjustable frequency (f _{LO, 1} , f _{LO, 2} ).

With the minimal or reduced hardware realization focused in a single RFFE 10 it can reduce sources of error and minimize or reduce the number of components. The requirements for the RFFE 10 For example, they can be variably satisfied by calculated sampling frequencies, with the considerably reduced sampling frequency playing a central role as a function of signal bandwidths. In addition, by appropriate parameterization in the calculation of the sampling frequencies any or at least increased flexibility and agility can be ensured. The compact RFFE 10 can enable unnecessary inter-tunable settings on multiple RFFEs 10 and to reduce or minimize errors. Reconfigurability and frequency agility can provide improved forward compatibility, reduce the complexity of the networking architecture, and increase flexibility. There may be a direct cost advantage by reducing country variants (eg, item numbers), at the same time there are new opportunities for customizing, eg in the used car area (fleet vehicles) by reconfiguring the ECU to allow new functions (no hardware replacement required) and at novel sales models, such as car sharing.

10 illustrates an illustration of possible flexibility in an embodiment that may enable hybrid radio resource management and scalability of the connection options. 10 Illustrated on the left side of an embodiment of a motor vehicle 20 with a radio receiver described above 10 , In the motor vehicle as a multi-radio compatibility is achieved because the radio receiver 10 is designed for several radio standards (also "multistandard radio front-end"). The number of control units or separate radio receiver in the motor vehicle 20 can thus be reduced compared to conventional concepts. The 10 shows in the middle an illustration for illustrating the forward compatibility of the embodiment, which allows a reduction of the discrepancy between the life expectancy of a vehicle and that of a communication system. In this respect, the exemplary embodiment is already adapted to future communication systems by the achieved degree of configurability and allows a corresponding later adaptation. 10 symbolizes on the right side the adaptability of the embodiment to new frequency allocations or regional frequency allocation differences. The above-described aggregation or defragmentation allows adaptation to different frequency bands, which may entail future and regional spectral adjustments. In addition, regional variations in hardware can be reduced, which can provide advantages in mounting and adapting the vehicles.

11 shows a further comparison of a decentralized receiver structure and a central receiver structure in one embodiment. The comparison of a decentralized (left) and central (right) networking architecture by means of technical and non-technical performance indicators illustrates the advantages of exemplary embodiments. In the 11 On the left, the conventional architecture is shown, which has several parallel systems (subsystems 1 .. N), which may possibly interfere with each other (interference). In the 11 In this case, signal processing on layer 1 (also "animal 1", or physical layer) is assumed. The 11 shows for the conventional system several individual antennas "ANT. _{# 1} , ... ANT. _#N , several radio receivers (also English "transceiver control Units (TCU _{# 1} , ... TCU _#N ) ") and several HUs, which also engl. "Access Units (AU _{# 1} , ... AU _{# N} )" are called.

In embodiments, for example, antennas of the individual systems can be combined or unified, for example by the use of broadband antennas. As described above, the individual transceivers may also be implemented by an embodiment of a radio receiver 10 be summarized or unified. Signal processing devices, such as multiple controllers or controllers, may also be grouped or unified. The 11 On the right shows an embodiment with a broadband antenna 16 , a universal RFFE 10 according to an embodiment and a central controller (AU / HU) performing interference management, coexistence management, and strategic connection management for the vehicle. In the exemplary embodiment, the number of required components and the performance tests (also known as "Key Performance Indicators (KPI)"), which were carried out, for example, by performance tests of the individual components in the conventional architecture, are reduced. These can now be carried out easily and also centralized.

12 shows a flowchart of an embodiment of a method for a radio receiver for a motor vehicle. The method includes providing 22 a received signal, wherein the received signal comprises at least two transmission bands of different radio systems. The method further includes sampling 24 the received signal for converting the received signal into a baseband and determining 26 baseband signals for the at least two radio systems based on the received baseband signal. Another embodiment is a computer program for performing at least one of the methods described above when the computer program runs on a computer, a processor, or a programmable hardware component. Another embodiment is also a digital storage medium that is machine or computer readable and that has electronically readable control signals that can cooperate with a programmable hardware component to perform one of the methods described above.

The features disclosed in the foregoing description, the appended claims and the appended figures may be taken to be and effect both individually and in any combination for the realization of an embodiment in its various forms.

Although some aspects have been described in the context of a device, it will be understood that these aspects also constitute a description of the corresponding method, so that a block or a component of a device is also to be understood as a corresponding method step or as a feature of a method step. Similarly, aspects described in connection with or as a method step also represent a description of a corresponding block or detail or feature of a corresponding device.

Depending on particular implementation requirements, embodiments of the invention may be implemented in hardware or in software. The implementation may be performed using a digital storage medium, such as a floppy disk, a DVD, a Blu-Ray Disc, a CD, a ROM, a PROM, an EPROM, an EEPROM or FLASH memory, a hard disk, or other magnetic disk or optical memory are stored on the electronically readable control signals, which can cooperate with a programmable hardware component or cooperate such that the respective method is performed.

A programmable hardware component may be integrated by a processor, a central processing unit (CPU), a graphics processing unit (GPU), a computer, a computer system, an application-specific integrated circuit (ASIC) Circuit (IC = Integrated Circuit), a system on chip (SOC) system, a programmable logic element or a field programmable gate array with a microprocessor (FPGA = Field Programmable Gate Array) may be formed.

The digital storage medium may therefore be machine or computer readable. Thus, some embodiments include a data carrier having electronically readable control signals capable of interacting with a programmable computer system or programmable hardware component such that one of the methods described herein is performed. One embodiment is thus a data carrier (or a digital storage medium or a computer readable medium) on which the program is recorded for performing any of the methods described herein.

In general, embodiments of the present invention may be implemented as a program, firmware, computer program, or computer program product with program code or data, the program code or data Data is operative to perform one of the methods when the program is run on a processor or a programmable hardware component. The program code or the data can also be stored, for example, on a machine-readable carrier or data carrier. The program code or the data may be present, inter alia, as source code, machine code or bytecode as well as other intermediate code.

Another embodiment is further a data stream, a signal sequence, or a sequence of signals that represents the program for performing any of the methods described herein. The data stream, the signal sequence or the sequence of signals can be configured, for example, to be transferred via a data communication connection, for example via the Internet or another network. Embodiments are also data representing signal sequences that are suitable for transmission over a network or a data communication connection, the data representing the program.

For example, a program according to one embodiment may implement one of the methods during its execution by, for example, reading or writing one or more data into memory locations, optionally switching operations or other operations in transistor structures, amplifier structures, or other electrical, optical, magnetic or caused by another operating principle working components. Accordingly, by reading a memory location, data, values, sensor values or other information can be detected, determined or measured by a program. A program can therefore acquire, determine or measure quantities, values, measured variables and other information by reading from one or more storage locations, as well as effect, initiate or execute an action by writing to one or more storage locations and control other devices, machines and components ,

The embodiments described above are merely illustrative of the principles of the present invention. It will be understood that modifications and variations of the arrangements and details described herein will be apparent to others of ordinary skill in the art. Therefore, it is intended that the invention be limited only by the scope of the appended claims and not by the specific details presented in the description and explanation of the embodiments herein.

LIST OF REFERENCE NUMBERS

10

radio receiver

12

receiver

12a (I-III)

receiver amplifier

12b (I-III)

Bandpass filter

12c

multiplexer

12d (I-III)

Bandpass filter

12e (II-III)

 mixer

12f (II-III)

local oscillator

12g

Summation member

14

Signal processing device

14a

ADC

14b

Bandpass filter

20

motor vehicle

22

Provide

24

Scan

26

Determine

100

receiving antenna

102

BP filter

104

RF amplifier

106

mixer

108

VCO

110

BP filter

112

RF amplifier

114

1st processing stage

116

2nd processing stage

118

n. processing stage

120

demodulator

122

NF-amplifier

124

Head Unit

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 202007009431 U1 [0004]
• EP 1978647 A2 [0004]
• US 2009/0147898 A1 [0004]

Claims (18)

A radio receiver ( 10 ) for a motor vehicle ( 20 ), with a receiving device ( 12 ) configured to provide a reception signal, the reception signal comprising at least two transmission bands of different radio systems; and a signal processing device ( 14 ) configured to sample the received signal to baseband and to determine base band signals for the at least two radio systems based on the baseband receive signal. Radio receiver ( 10 ) according to claim 1, wherein at least one of the radio systems corresponds to a mobile radio system, a navigation system, a terrestrial broadcasting system, a wireless local area network, WLAN, or a satellite-supported broadcasting system. Radio receiver ( 10 ) according to one of the preceding claims, wherein at least one of the radio systems corresponds to a mobile radio system and another of the radio systems to a broadcasting system. Radio receiver ( 10 ) according to one of the preceding claims, in which the receiving device ( 12 ) is further configured to receive a high frequency signal and to shift at least one of the at least two transmission bands in a high frequency range to obtain the received signal. Radio receiver ( 10 ) according to claim 4, wherein two center frequencies of the at least two transmission bands in the high-frequency signal have a greater distance from each other than in the received signal. Radio receiver ( 10 ) according to claim 4, wherein in the high-frequency signal, a highest and a lowest frequency, which are assigned to the two transmission bands, in the frequency range have a greater distance from one another than in the received signal. Radio receiver ( 10 ) according to one of claims 4 to 6, wherein the receiving device ( 12 ) at least one mixer ( 12eII ; 12eIII ) and at least one local oscillator ( 12fII ; 12fIII ) to shift the at least one transmission band in the high frequency range. Radio receiver ( 10 ) according to one of claims 4 to 7, wherein the receiving device ( 12 ) a bandpass filter ( 12DI ; 12dII ; 12dIII ) in order to filter out the at least one transmission band from the high-frequency signal and to obtain a band-pass signal for the at least one transmission band, the receiving device ( 12 ) is further adapted to shift the bandpass signal for the at least one transmission band in the high frequency range and to combine it with at least one other transmission band ( 12g ) to receive the received signal. Radio receiver ( 10 ) according to one of claims 4 to 8, wherein the receiving device ( 12 ) is further adapted to adjust a level of at least one of the transmission bands. Radio receiver ( 10 ) according to one of claims 4 to 9, wherein the receiving device ( 12 ) with respect to the transmission bands and the shift in the high frequency range is configurable. Radio receiver ( 10 ) according to one of claims 4 to 10, wherein the receiving device ( 12 ) for shifting the at least one transmission band in the high-frequency range, a controllable oscillator ( 12fII ; 12fIII ). Radio receiver ( 10 ) according to one of the preceding claims, in which the receiving device ( 12 ) is configured to provide the received signal as a bandpass signal. Radio receiver ( 10 ) according to one of the preceding claims, further comprising at least one receiving antenna ( 16 ) connected to the receiving device ( 12 ), wherein the receiving antenna ( 16 ) is adapted to receive the at least two transmission bands of the at least two radio systems. Radio receiver ( 10 ) according to one of the preceding claims, wherein the received signal in the baseband comprises a bandwidth of 10 MHz or more. Radio receiver ( 10 ) according to one of the preceding claims, wherein the signal processing device ( 14 ) an analog-to-digital converter ( 14a ) to baseband the received signal by sub-sampling or bandpass sampling. Motor vehicle ( 20 ) with a device according to one of the preceding claims. Method for a radio receiver for a motor vehicle, with provision ( 22 ) of a received signal, wherein the received signal comprises at least two transmission bands of different radio systems; Scanning ( 24 ) of the received signal for converting the received signal into a baseband; and Determine ( 26 ) of baseband signals for the at least two radio systems based on the received signal in baseband.  Computer program for carrying out the method according to the preceding claim, when the computer program runs on a computer, a processor or a programmable hardware component.

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