EP3202046A1 - Génération d'un signal d'émission à large bande - Google Patents

Génération d'un signal d'émission à large bande

Info

Publication number
EP3202046A1
EP3202046A1 EP14777321.2A EP14777321A EP3202046A1 EP 3202046 A1 EP3202046 A1 EP 3202046A1 EP 14777321 A EP14777321 A EP 14777321A EP 3202046 A1 EP3202046 A1 EP 3202046A1
Authority
EP
European Patent Office
Prior art keywords
transmit signal
signal generation
generation circuits
transmit
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14777321.2A
Other languages
German (de)
English (en)
Inventor
Bjoern Jelonnek
Marko FLEISCHER
Frank DECHEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Solutions and Networks Oy
Original Assignee
Nokia Solutions and Networks Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Solutions and Networks Oy filed Critical Nokia Solutions and Networks Oy
Publication of EP3202046A1 publication Critical patent/EP3202046A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
    • H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0483—Transmitters with multiple parallel paths

Definitions

  • the present invention relates to wideband transmit signal generation. More specifically, the present invention relates to an apparatus for wideband transmit signal generation, a method of operating the same, and a computer program product for carrying out the method of operating the same .
  • radio freguency (RF) units for modern/future mobile communication entities support transmission of such wideband transmit signals even with low power usage .
  • a wideband-enabled transmit signal path including e.g. a wideband digital pre-distortion (DPD) and a wideband power amplifier (PA), together with a single antenna.
  • DPD digital pre-distortion
  • PA wideband power amplifier
  • power amplifiers capable of supporting such wideband transmit signals are under development, these have to cope with several challenges such as reduced efficiency and higher freguency dependency of their non-linearity operation with a higher transmit signal bandwidth.
  • the complexity and implementation effort of the DPD increases in more than a guadratic manner with regard to transmit signal bandwidth. For example, with PA transistors having resonances in the region of 250 MHz, a significant degradation of the digital pre-distortion result is expected for a transmit signal with 400 MHz bandwidth.
  • an apparatus comprising a plurality of transmit signal generation circuits configured to generate a plurality of transmit signals having different freguency bands, a combination circuit configured to combine the plurality of transmit signals to generate an output transmit signal, the combination circuit comprising a plurality of bandpass filter circuits having mutually overlapping freguency responses for the plurality of transmit signal generation circuits, and a control circuit configured to control the plurality of transmit signal generation circuits in accordance with operating characteristics of the combination circuit.
  • the operating characteristics of the combination circuit may comprise the freguency responses of the bandpass filter circuits of the combination circuit.
  • each of the plurality of transmit signal generation circuits may comprise a power amplification circuit .
  • control circuit may be configured to control an input signal of the power amplification circuit of each of the transmit signal generation circuits for an overlap region of the freguency responses of the plurality of bandpass filter circuits .
  • control circuit may be configured to control the input signal of the power amplification circuit of each of the transmit signal generation circuits such that the resulting output signals are adjusted to combine with each other so as to produce a desired output transmit signal in the overlap region.
  • control circuit may be configured to control a digital pre- distortion circuit or an adaptive filter circuit arranged on an input side of the power amplification circuit.
  • control circuit may be configured to control one or more of the plurality of transmit signal generation circuits to switch off generation of the respective one or more transmit signals.
  • the combination circuit may be configured to generate a wideband output transmit signal using at least two of the plurality of transmit signals, wherein said wideband output transmit signal has a freguency band involving the freguency bands of the at least two transmit signals, or one or more narrowband output transmit signals respectively using one of the plurality of transmit signals, wherein said narrowband output transmit signal has a freguency band involving the freguency band of the one transmit signal.
  • control circuit may be configured to select the one or more transmit signals to be used for generating the output transmit signal in accordance with a loss of each of the transmit signal generation circuits in a predetermined freguency region.
  • control circuit may be configured to control the plurality of transmit signal generation circuits using at least one of measurements of each of the transmit signals and the output transmit signal.
  • control circuit may be configured to identify a transformation network in each of the plurality of transmit signal generation circuits, and to control the plurality of transmit signal generation circuits using the identified transformation network of each of the transmit signal generation circuits.
  • the apparatus may further comprise a plurality of circulators arranged on an output side of each of the plurality of transmit signal generation circuits, each circulator being configured to transfer the generated transmit signal to a respective bandpass filter in the combination circuit.
  • the control circuit may be configured to detect a loss of each of the transmit signal generation circuits in a predetermined freguency region of the freguency response of the respective bandpass filter using a reflected signal transferred from the respective bandpass filter by the respective circulator, and to control the plurality of transmit signal generation circuits using the detected loss of each of the transmit signal generation circuits.
  • the apparatus may further comprises a load modulation detection circuit configured to detect a load modulation between the plurality of transmit signal generation circuits, wherein the control circuit may be configured to control the plurality of transmit signal generation circuits using the detected load modulation.
  • the apparatus may comprise or be comprised by a radio freguency unit of a mobile communication entity.
  • a method of operating an apparatus comprising a plurality of transmit signal generation circuits and a combination circuit comprising a plurality of bandpass filter circuits having mutually overlapping freguency responses for the plurality of transmit signal generation circuits, the method comprising causing the plurality of transmit signal generation circuits to generate a plurality of transmit signals having different freguency bands, causing the combination circuit to combine the plurality of transmit signals to generate an output transmit signal, and controlling the plurality of transmit signal generation circuits in accordance with operating characteristics of the bandpass filter circuits.
  • the method may further comprise causing the combination circuit to generate a wideband output transmit signal using at least two of the plurality of transmit signals, wherein said wideband output transmit signal has a freguency band involving the freguency bands of the at least two transmit signals, or generate one or more narrowband output transmit signals respectively using one of the plurality of transmit signals, wherein said narrowband output transmit signal has a freguency band involving the freguency band of the one transmit signal.
  • a computer program product comprising computer-executable computer program code which, when the computer program code is executed on a computer, is configured to cause the computer to carry out a method according to the above method-related example aspect.
  • a technigue for generation of wideband transmit signals (or, stated in other words, support of transmission of wideband transmit signals) is provided.
  • the technigue according to exemplifying embodiments of the present invention is capable of avoiding deficiencies such as increased cost and/or size as well as reduced efficiency and/or increased complexity due to increased transmit signal bandwidth.
  • FIG. 1 shows a simplified block diagram of a basic structure of an apparatus according to exemplifying embodiments of the present invention
  • Figure 2 shows a diagram illustrating the principle of wideband coherent combining according to exemplifying embodiments of the present invention
  • Figure 3 shows diagrams illustrating different operation modes under the principle of wideband coherent combining according to exemplifying embodiments of the present invention
  • Figure 4 shows a block diagram of a first exemplary structure of a RF unit comprising an apparatus according to exemplifying embodiments of the present invention
  • Figure 5 shows a block diagram of a second exemplary structure of a RF unit comprising an apparatus according to exemplifying embodiments of the present invention
  • Figure 6 shows a block diagram of a third exemplary structure of a RF unit comprising an apparatus according to exemplifying embodiments of the present invention.
  • Figure 7 shows a flowchart of a method of operating an apparatus according to exemplifying embodiments of the present invention.
  • lines/arrows interconnecting individual blocks or entities are generally meant to illustrate an operational coupling there-between, which may be a physical and/or logical coupling, which on the one hand is implementation-independent (e.g. wired or wireless) and on the other hand may also comprise an arbitrary number of intermediary functional blocks or entities not shown.
  • Figure 1 shows a simplified block diagram of a basic structure of an apparatus according to exemplifying embodiments of the present invention.
  • an apparatus 100 comprises a plurality of transmit signal generation circuits 110 and 120, a combination circuit 130 and a control circuit 140.
  • Each of the transmit signal generation circuits 110, 120 is configured to generate a transmit signal, i.e. a narrowband transmit signal, wherein the thus generated transmit signals have different freguency bands.
  • the freguency bands of two narrowband transmit signals may partly overlap or adjoin each other.
  • the combination circuit 130 is configured to combine the plurality of transmit signals to generate an output transmit signal, and comprises a plurality of bandpass filter circuits BPFl, BPF2 having mutually overlapping freguency responses for - li
  • the control circuit 140 is configured to control the plurality of transmit signal generation circuits. Such control may be performed in accordance with operating characteristics of the combination circuit, such as e.g. the freguency responses of the bandpass filter circuits of the combination circuit 130. While the exemplary structure of Figure 1 illustrates two transmit signal generation circuits, it is to be noted that the present invention is not limited to such configuration. Rather, there may be an arbitrary number of transmit signal generation circuits, such as e.g. three or more. In such case, the freguency responses of a pair of bandpass filter circuits for two of the transmit signal generation circuits are mutually overlapping, respectively.
  • the combination circuit 140 is operable to combine the plurality of transmit signals to generate an output transmit signal under the principle of wideband coherent combining (CC) .
  • the principle of wideband coherent combining (CC) refers to a freguency- dependent combination of narrowband transmit signals using bandpass filter circuits with overlapping freguency responses.
  • the narrowband signals can be combined such that a desired output transmit signal in the overlap region can be generated.
  • the transmit signal generation circuits each comprise a power amplification circuit such as a power amplifier (PA)
  • PA power amplifier
  • the control circuit may control an input signal of the power amplification circuit of each of the transmit signal generation circuits for an overlap region of the freguency responses of the plurality of bandpass filter circuits. More specifically, the control circuit may control the input signal of the power amplification circuit of each of the transmit signal generation circuits such that the resulting output signals are adjusted to combine with each other so as to produce a desired output transmit signal in the overlap region.
  • the control of the plurality of transmit signal generation circuits may be based on various parameters, such as at least one of measurements of each of the transmit signals and the output transmit signal.
  • the control may be based on (a measurement of) one or more of the transmit signals, or may be based on (a measurement of) the output transmit signal, or may be based on both (a measurement of) one or more of the transmit signals and (a measurement of) the output transmit signal.
  • Figure 2 shows a diagram illustrating the principle of wideband coherent combining according to exemplifying embodiments of the present invention.
  • the horizontal axis represents the freguency
  • the dashed curve represents the freguency response of a first bandpass filter circuit denoted by BPFl corresponding to (the frequency band of the narrowband transmit signal of) a first transmit signal generation circuit
  • the chain line represents the frequency response of a second bandpass filter circuit denoted by BPF2 corresponding to (the frequency band of the narrowband transmit signal of) a second transmit signal generation circuit.
  • the rectangles represent individual frequency carriers, wherein the solid rectangles represent carriers in the frequency band of the first transmit signal generation circuit, and the hatched rectangles represent carriers in the frequency band of the second transmit signal generation circuit.
  • the principle of coherent combining (CC) is applied in the overlap region between the two frequency responses, which is represented by the dotted oval.
  • CC principle of coherent combining
  • the combination circuit 140 is operable in different operation modes, as outlined below.
  • Figure 3 shows diagrams illustrating different operation modes under the principle of wideband coherent combining according to exemplifying embodiments of the present invention .
  • the combination circuit operates in a first operation mode, in which a wideband output transmit signal is generated using two transmit signals (in general, at least two of a plurality of transmit signals) .
  • the resulting wideband output transmit signal has a freguency band involving the freguency bands of both (in general, the at least two) transmit signals.
  • the combination operates in a second operation mode, in which a narrowband output transmit signal is generated using one of the two (in general, the plurality of) transmit signals.
  • the resulting narrowband output transmit signal has a freguency band involving the freguency band of the one transmit signal.
  • the resulting narrowband output transmit signal may comprise a part of the other transmit signal in the overlap region, respectively. This is specifically effective when the same data signal is transmitted via both transmit signal paths.
  • the control circuit may control one or more of the plurality of transmit signal generation circuits to switch off generation of the respective one or more transmit signals. Namely, the control circuit may select one or more transmit signals to be used for generating the output transmit signal (i.e. switch on or activate generation thereof), thus setting the respective transmit signal/signals in a high power or switch-on state. Stated the other way round, deselect one or more transmit signals not to be used for generating the output transmit signal (i.e. switch off or deactivate generation thereof), thus setting the respective transmit signal/ signals in a low power or switch-off state.
  • such de-/selection may be made in accordance with a loss of each of the transmit signal generation circuits (or e.g. its power amplifier) in a predetermined freguency region such as the overlap region.
  • both transmit signal generation circuits can be used for the generation/provision of the output transmit signal in a freguency region in which both of them are effectively operable in view of their loss characteristics (e.g. when both transmit signal generation circuits or e.g. their power amplifiers exhibit a similar loss) .
  • a freguency region in which only one of the transmit signal generation circuits is effectively operable in view of their loss characteristics (e.g. when one of the transmit signal generation circuits or e.g.
  • the transmit signal generation circuit with the lower loss can be used for the generation/provision of the output transmit signal.
  • one or more of the plural transmit signal generation circuits may be controlled to be switched off when its/their freguency band/bands is/are not reguired for generation/provision of the output transmit signal .
  • each of the transmit signal generation circuits comprises a power amplifier PA and a digital pre-distortion circuit DPD (which could also be replaced or accompanied by any type of adaptive filter circuit) arranged on an input side of the power amplifier PA.
  • each of the transmit signal generation circuits exemplarily also comprises a digital-to-analog converter DAC, a local oscillator and a low-power transmit signal TX .
  • DAC digital-to-analog converter
  • TX low-power transmit signal
  • an exemplary RF unit comprises two transmit signal generation circuits (indicated by dashed boxes), a filter combiner and a control circuit, like the apparatus of Figure 1, as well as a circulator at the output of the filter combiner, and a duplex filter towards an antenna.
  • the circulators in the narrowband transmit signal paths are illustrated as part of the respective transmit signal generation circuits, it is to be noted that such illustration is made for explanatory purposes only without any limitation to such configuration. Namely, the circulators in the narrowband transmit signal paths may be also be arranged outside of the respective transmit signal generation circuits, as long as being arranged on an output side of each of the plurality of transmit signal generation circuits. That is, the circulator in each narrowband transmit signal path is configured to transfer the generated narrowband transmit signal to a respective bandpass filter in the filter combiner representing a combination circuit.
  • control of the transmit signal generation circuits may be based on various control inputs .
  • control inputs may comprise one or more of measurements of each of the narrowband transmit signals (as indicated by angled arrows between PA 0 /PA ! and the respective circulator) and a measurement of the output transmit signal (as indicated by an angled arrow between the adder in the filter combiner and the following circulator) .
  • a measurement of the output transmit signal i.e. the combined transmit signal, can be effectively used for ensuring a flat frequency characteristic, i.e. a (nearly) constant power, voltage or the like over the entire frequency band including the overlap region.
  • control inputs may comprise one or more of losses of the transmit signal generation circuits (e.g. PA 0 /PAi, the respective circulator, or the like) in a predetermined frequency region of the frequency response (such as the frequency region thereof) of the respective bandpass filter.
  • a loss of a transmit signal generation circuit e.g. PA 0 /PAi
  • PA 0 /PAi a transmit signal generation circuit
  • Such a loss of a transmit signal generation circuit may be obtained using a reflected signal transferred from the respective bandpass filter (to the control circuit) by the respective circulator (as indicated by arrows from between the respective circulator and the control block) . Based on the thus detected loss/losses, a loss-related control can be performed, as outlined above.
  • FIG. 5 shows a block diagram of a second exemplary structure of a RF unit comprising an apparatus according to exemplifying embodiments of the present invention.
  • the exemplary RF unit of Figure 5 is basically similar to that of Figure 4. Accordingly, the description of similar parts and functionalities is omitted, and only differences are described below.
  • an exemplary RF unit comprises two transmit signal generation circuits (indicated by dashed boxes), a filter combiner and a control circuit, like the apparatus of Figure 1, wherein the filter combiner is integrated with a duplex filter.
  • Figure 6 shows a block diagram of a third exemplary structure of a RF unit comprising an apparatus according to exemplifying embodiments of the present invention.
  • an exemplary RF unit comprises two transmit signal generation circuits (indicated by dashed boxes), a filter combiner and a control circuit, like the apparatus of Figure 1, as well as a circulator at the output of the filter combiner, and a duplex filter towards an antenna.
  • a load modulation detection circuit is provided in the control block or, stated in other words, load modulation detection means is realized by the control block.
  • load modulation detection circuit is configured to detect a load modulation between the plurality of transmit signal generation circuits (as indicated by angled arrows between PA 0 /PAi and the respective bandpass filter), and the control of the plurality of transmit signal generation circuits may be based on the detected load modulation.
  • Such load modulation may be based on transmit signals transferred between respective transmit signal generation circuits (such as a transfer of the transmit signal from PAi to PA 0 , and vice versa) and/or a reflected signal transferred from the respective bandpass filter back to the generating transmit signal generation circuit (such as a reflection of a signal from bandpass filter 0 to PA 0 , or the like) .
  • the load point/level of the respective transmit signal generation circuit e.g. the load resistance of PAo/PAi
  • a control similar to the above-outlined loss- related control can be performed. Taking into consideration one or more transferred signals in the control can be effectively used for generation/provision of an output transmit signal capable of compensating for such ( undesired/leaked) transfer or transfers.
  • control of the transmit signal generation circuits may be based on various control inputs, such as one or more of measurements of each of the narrowband transmit and a measurement of the output transmit signal, as described above in connection with Figure 4.
  • the control of the transmit signal generation circuits may additionally or alternatively be based on characteristics of a transformation network in any one of the transmit signal generation circuits (i.e. the transformation network in ⁇ 0 / ⁇ ) .
  • the control circuit in any one of Figures 4 to 6 may be configured to identify a transformation network in the transmit signal generation circuits, and to control the transmit signal generation circuits using the identified transformation network, respectively.
  • Figure 7 shows a flowchart of a method of operating an apparatus according to exemplifying embodiments of the present invention.
  • Such operating method is applicable for any apparatus comprising a plurality of transmit signal generation circuits and a combination circuit comprising a plurality of bandpass filter circuits having mutually overlapping freguency responses for the plurality of transmit signal generation circuits .
  • the plurality of transmit signal generation circuits are caused to generate a plurality of transmit signals having different freguency bands.
  • the combination circuit is caused to combine the plurality of transmit signals to generate an output transmit signal.
  • the plurality of transmit signal generation circuits are controlled in accordance with operating characteristics of the combination circuit, such as e.g. the frequency responses of the bandpass filter circuits . Details of such operating method are evident from the functional description of Figures 1 to 6 above .
  • Figure 7 merely shows an exemplary flowchart for illustrative purposes, in which an exemplary sequence of processes is illustrated.
  • the present invention is however not limited to the illustrated sequence of processes. Rather, the process 730 may precede or (at least partly) overlap with the process 720, or all of the processes 710 to 730 may be performed simultaneously or in parallel or may (at least partially) overlap. Also, two or more of the processes may be performed in a mutually adaptive/dependent manner.
  • An operating method may be implemented by respective functional elements, entities, modules, units, processors, or the like, as described below.
  • it may be implemented by any kind of controller, processor, or the like, by hardware or software (and/or firmware) or any combination thereof. That is, such operating method may be embodied as a computer program product, e.g. computer code instructions stored in a computer-readable memory.
  • the technigue according to exemplifying embodiments of the present invention is capable of avoiding deficiencies such as increased cost and/or size as well as reduced efficiency and/or increased complexity due to increased transmit signal bandwidth.
  • liguid radio concepts for wider bandwidths such as transmit signals with a bandwidth of several hundred MHz, e.g. 400 MHz or more, can be implemented .
  • the principle of wideband coherent combining (CC) is efficiently adopted for generating wideband transmit signals, especially in an overlapping region of freguency responses of respective bandpass filter circuits used in the signal combination.
  • exemplifying embodiments of the present invention enable an adeguate signal combination of different signals (e.g. signals for different freguency bands) being transmitted via plural transmit signal paths (without degradation DPD results, inaccurate impedance levels, additional load, etc., for example) .
  • respective functionalities, functional blocks or elements described above can be implemented by any known means, either in hardware and/or software, respectively, if it is only adapted to perform the described functions of the respective parts .
  • the mentioned method steps can be realized in individual functional blocks or by individual devices, or one or more of the method steps can be realized in a single functional block or by a single device.
  • any structural means such as a portion or other circuitry of an amplifier may refer to one or more of the following: (a) hardware-only circuit implementations (such as implementations in only analog and/or digital circuitry) and (b) combinations of circuits and software (and/or firmware), such as (as applicable) : (i) a combination of processor(s) or (ii) portions of proces sor ( s )/ software (including digital signal processor ( s )) , software, and memory (ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) circuits, such as a microproces sor ( s ) or a portion of a microprocessor ( s ) , that reguire software or firmware for operation, even if the software or firmware is not physically present. Also, it may also cover an implementation of merely a processor (or multiple processors) or portion of a processor and its (or their) accompanying software and/or firmware, any integrated circuit, or the like.
  • Any procedural step or functionality is suitable to be implemented as software/firmware or by hardware without changing the idea of the present invention.
  • Such software may be software code independent and can be specified using any known or future developed programming language, such as e.g. Java, C++, C, and Assembler, as long as the functionality defined by the method steps is preserved.
  • Such hardware may be hardware type independent and can be implemented using any known or future developed hardware technology or any hybrids of these, such as MOS (Metal Oxide Semiconductor), CMOS (Complementary MOS), BiMOS (Bipolar MOS), BiCMOS (Bipolar CMOS), ECL (Emitter Coupled Logic), TTL (Transistor-Transistor Logic), etc., using for example ASIC (Application Specific IC (Integrated Circuit)) components, FPGA (Field-programmable Gate Arrays) components, CPLD (Complex Programmable Logic Device) components or DSP (Digital Signal Processor) components.
  • MOS Metal Oxide Semiconductor
  • CMOS Complementary MOS
  • BiMOS Bipolar MOS
  • BiCMOS BiCMOS
  • ECL Emitter Coupled Logic
  • TTL Transistor-Transistor Logic
  • ASIC Application Specific IC
  • FPGA Field-programmable Gate Arrays
  • CPLD Complex Programmable Logic Device
  • DSP
  • a device/apparatus may be represented by a semiconductor chip, a chipset, or a (hardware) module comprising such chip or chipset; this, however, does not exclude the possibility that a functionality of a device/apparatus or module, instead of being hardware implemented, be implemented as software in a (software) module such as a computer program or a computer program product comprising executable software code portions for execution/being run on a processor.
  • a device may be regarded as a device/apparatus or as an assembly of more than one device/apparatus, whether functionally in cooperation with each other or functionally independently of each other but in a same device housing, for example.
  • Software in the sense of the present description comprises software code as such comprising code means or portions or a computer program or a computer program product for performing the respective functions, as well as software (or a computer program or a computer program product) embodied on a tangible medium such as a computer-readable (storage) medium having stored thereon a respective data structure or code means/portions or embodied in a signal or in a chip, potentially during processing thereof.
  • Apparatuses and/or means or parts thereof can be implemented as individual devices, but this does not exclude that they may be implemented in a distributed fashion throughout the system, as long as the functionality of the device is preserved. Such and similar principles are to be considered as known to a skilled person.
  • the present invention also covers any conceivable combination of method steps and operations described above, and any conceivable combination of nodes, apparatuses, modules or elements described above, as long as the above- described concepts of methodology and structural arrangement are applicable.
  • Such technigue exemplarily comprise an apparatus comprising a plurality of transmit signal generation circuits configured to generate a plurality of transmit signals having different freguency bands, a combination circuit configured to combine the plurality of transmit signals to generate an output transmit signal, the combination circuit comprising a plurality of bandpass filter circuits having mutually overlapping freguency responses for the plurality of transmit signal generation circuits, and a control circuit configured to control the plurality of transmit signal generation circuits in accordance with operating characteristics of the combination circuit, such as e.g. the freguency responses of the bandpass filter circuits of the combination circuit .

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Amplifiers (AREA)

Abstract

L'invention concerne une technique de génération d'un signal d'émission à large bande. Une telle technique comprend par exemple un appareil comprenant une pluralité de circuits de génération de signal d'émission conçu pour générer une pluralité de signaux d'émission ayant différentes bandes de fréquence, un circuit de combinaison conçu pour combiner la pluralité de signaux d'émission pour générer un signal d'émission de sortie, le circuit de combinaison comprenant une pluralité de circuits de filtre passe-bande ayant des réponses en fréquence se chevauchant mutuellement pour la pluralité de circuits de génération de signal d'émission, et un circuit de commande conçu pour commander la pluralité de circuits de génération de signal d'émission en fonction des caractéristiques de fonctionnement du circuit de combinaison, telles que, par exemple, les réponses en fréquence des circuits de filtre passe-bande du circuit de combinaison.
EP14777321.2A 2014-09-30 2014-09-30 Génération d'un signal d'émission à large bande Withdrawn EP3202046A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/070857 WO2016050273A1 (fr) 2014-09-30 2014-09-30 Génération d'un signal d'émission à large bande

Publications (1)

Publication Number Publication Date
EP3202046A1 true EP3202046A1 (fr) 2017-08-09

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Application Number Title Priority Date Filing Date
EP14777321.2A Withdrawn EP3202046A1 (fr) 2014-09-30 2014-09-30 Génération d'un signal d'émission à large bande

Country Status (2)

Country Link
EP (1) EP3202046A1 (fr)
WO (1) WO2016050273A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4217661A (en) * 1975-10-14 1980-08-12 Kahn Leonard R Audio signal transmission system and method incorporating automatic frequency correction
US20090052556A1 (en) * 2007-08-23 2009-02-26 Fernandez Andrew D Frequency interleaving method for wideband signal generation
US8767845B2 (en) * 2010-03-02 2014-07-01 The Aerospace Corporation Increased capacity communication links with spectrum sharing

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2016050273A1 *

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