WO2023097461A1 - Procédé de réception multiporteuse et récepteur multiporteuse - Google Patents

Procédé de réception multiporteuse et récepteur multiporteuse Download PDF

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Publication number
WO2023097461A1
WO2023097461A1 PCT/CN2021/134462 CN2021134462W WO2023097461A1 WO 2023097461 A1 WO2023097461 A1 WO 2023097461A1 CN 2021134462 W CN2021134462 W CN 2021134462W WO 2023097461 A1 WO2023097461 A1 WO 2023097461A1
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WIPO (PCT)
Prior art keywords
signal
carrier
filter
carrier signal
processing circuit
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PCT/CN2021/134462
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English (en)
Chinese (zh)
Inventor
朱昌富
邱煦
裴金亮
王德雨
黄江
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海能达通信股份有限公司
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Priority to PCT/CN2021/134462 priority Critical patent/WO2023097461A1/fr
Publication of WO2023097461A1 publication Critical patent/WO2023097461A1/fr

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    • 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
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference

Definitions

  • the present application relates to the technical field of communications, and in particular to a multi-carrier receiving method and a multi-carrier receiver.
  • Wideband multi-carrier receivers have great advantages in circuit miniaturization, cost control, and IF frequency planning, but are limited by the Signal to Noise Ratio (Signal to Noise Ratio, SNR), spurious free dynamic range (Spurious Free Dynamic Range, SFDR) and other specifications, the dynamic range of the receiver is much lower than that of the superheterodyne receiver, and it is easily affected by in-band interference signals.
  • SNR Signal to Noise Ratio
  • spurious free dynamic range Spurious Free Dynamic Range
  • the present application provides a multi-carrier receiving method and a multi-carrier receiver, which can improve the dynamic range of the receiver.
  • the technical solution adopted by this application is: provide a multi-carrier receiver, the multi-carrier receiver includes: a signal processing circuit and a plurality of receiving circuits, each receiving circuit includes a processing circuit and a filtering circuit connected to each other The switching circuit, the processing circuit is used to down-convert the multi-carrier signal to obtain the intermediate frequency signal; the filter switching circuit includes a selection circuit and a plurality of filters, and the filter bandwidths of the multiple filters are different, and the selection circuit is used to select from multiple filters Select one of the filters to filter the intermediate frequency signal to obtain the filtered signal; the signal processing circuit is connected to each receiving circuit to detect whether there is a strong carrier signal in the multi-carrier signal, and there is a strong carrier signal in the multi-carrier signal , control the selection circuit in at least two receiving circuits to select one of the filters to be connected to the processing circuit, so that the strong carrier signal and other carrier signals in the multi-carrier signal are filtered through different filters, wherein the strong carrier signal is
  • each receiving circuit includes a processing circuit and a filter switching circuit connected to each other, the filter switching circuit includes a selection circuit and a plurality of filters, and the filtering bandwidths of the plurality of filters are different
  • the method includes: using the processing circuit to perform multiple The carrier signal is down-converted to obtain an intermediate frequency signal; a filter is used to select one of the filters from multiple filters to filter the intermediate frequency signal to obtain a filtered signal; the signal processing circuit is used to detect whether there is a strong carrier signal in the multi-carrier signal, and When there is a strong carrier signal in the multi-carrier signal, control the selection circuit in at least two receiving circuits to select one of the filters to be connected to the processing circuit, so that the strong carrier signal and other carrier signals in the multi-carrier signal enter different filters respectively device, wherein the strong carrier signal is a carrier signal
  • the multi-carrier receiver includes a signal processing circuit and a plurality of receiving circuits, each receiving circuit includes a processing circuit and a filter switching circuit, and the processing circuit performs down-conversion on the multi-carrier signal to obtain a corresponding Intermediate frequency signal;
  • the filter switching circuit includes a selection circuit and a plurality of filters with different filter bandwidths, and the selection circuit selects a filter from all filters, so that the filter filters the intermediate frequency signal to obtain a filtered signal; in multi-carrier signals
  • the signal processing circuit controls the selection circuits in at least two receiving circuits, so that the selection circuit selects a corresponding filter to connect with the processing circuit, so that the strong carrier signal and The other carrier signals in the multi-carrier signal enter different filters respectively; since multiple filters with different filter bandwidths are designed on each receiving path, selecting an appropriate filter to filter the intermediate frequency signal can improve the pass-through of the filter.
  • FIG. 1 is a schematic structural diagram of an embodiment of a multi-carrier receiver provided by the present application
  • FIG. 2 is a schematic structural diagram of an embodiment of a receiving circuit provided by the present application.
  • FIG. 3 is a schematic structural diagram of another embodiment of a multi-carrier receiver provided by the present application.
  • Fig. 4 is the structural representation of processing circuit, filter switching circuit and signal processing circuit that the application provides;
  • Fig. 5 is a schematic diagram of the frequencies and signal strengths of four carrier signals provided by the present application.
  • Fig. 6 is the schematic diagram that demodulates 4 kinds of carrier signals shown in Fig. 5;
  • Fig. 7 is another schematic diagram of the frequencies and signal strengths of four carrier signals provided by the present application.
  • Fig. 8 is another schematic diagram of demodulating the 4 kinds of carrier signals shown in Fig. 5;
  • Fig. 9 is another schematic diagram of demodulating the four carrier signals shown in Fig. 5;
  • Fig. 10 is a schematic flowchart of an embodiment of a multi-carrier receiving method provided by the present application.
  • the input level of the base station receiver is much higher than -23dBm, which is extremely extreme.
  • the signal strength is greater than 0dBm.
  • FIG. 1 is a schematic structural diagram of an embodiment of a multi-carrier receiver provided by the present application
  • FIG. 2 is a schematic structural diagram of an embodiment of a receiving circuit provided by the present application.
  • the multi-carrier receiver includes: Each receiving circuit 10 and a signal processing circuit 20, each receiving circuit 10 includes a processing circuit 11 and a filter switching circuit 12 connected to each other.
  • the processing circuit 11 is used to obtain the carrier signal, and down-convert the multi-carrier signal to obtain an intermediate frequency signal; specifically, the multi-carrier signal includes a plurality of carrier signals, and the frequency difference of the plurality of carrier signals can be a fixed value, and the carrier signal is For the radio frequency signal, the processing circuit 11 can perform frequency mixing processing on the radio frequency signal to realize down-conversion.
  • the filter switching circuit 12 includes a selection circuit 122 and a plurality of filters 121, the filter bandwidths of the plurality of filters 121 are all different, and the selection circuit 122 is used to select one of the filters 121 from the plurality of filters 121 to filter the intermediate frequency signal, Obtain the filtered signal; Specifically, the bandwidth of the filter 121 with the widest bandwidth in the plurality of filters 121 is greater than the signal bandwidth of the multi-carrier signal, and the filter 121 can be a bandpass filter (Bandpass filter, BPF), each filter 121 is connected to the selection circuit 122, and different filter bandwidths can be selected for multiple filters 121 according to the needs or the frequency of the carrier signal, for example: the number of carrier signals is 2, and 2 filters are set in each filter switching circuit 12 Filter 121, their filter bandwidths are respectively: 500KHz, 2MHz; or the number of carrier signals is greater than 2, and the frequency interval between two adjacent carrier signals is 250KHz, then the carrier signal with the highest frequency and the carrier signal with the lowest frequency The
  • each filter switching circuit 12 denoted as F1, F2 and F3, and the filter F1
  • the bandwidth of the filter F2 is less than the frequency interval between two adjacent carrier signals, that is, less than 250KHz.
  • the bandwidth of the filter F2 is greater than the frequency interval between two adjacent carrier signals and less than/equal to the carrier signal with the highest frequency and the carrier signal with the lowest frequency.
  • the bandwidth of the filter F3 is the largest and greater than the signal bandwidth of the multi-carrier signal, for example: the number of carrier signals is 4, the filtering bandwidth of the filter F1-F3 can be set to: 100KHz, 1MHz and 5MHz, of course,
  • the bandwidth of the filter 121 is only shown as an example, and is not used to limit the application.
  • the specific value of the bandwidth of each filter 121 can be set according to specific application requirements.
  • a certain filter 121 in the filter switching circuit 12 can be connected to the processing circuit 11 and the signal processing circuit 20 through the selection circuit 122 by default, for example: assuming that the receiving circuit 10 includes four filters 121, the default Four filters 121 are connected to the processing circuit 11 and the signal processing circuit 20 . It can be understood that the number of filters 121 in each receiving circuit 10 or the default connected filter 121 can be different; 20; in the second receiving circuit 10, the third filter 121 is connected to the processing circuit 11 and the signal processing circuit 20 by default.
  • the filter 121 connected by default is a filter with a wider bandwidth, and the filtering bandwidth of the filter with a wider bandwidth is greater than the frequency interval between the carrier signal with the highest frequency and the carrier signal with the lowest frequency;
  • the number of carrier signals is 4 and the frequency interval of the carrier signals is 250 KHz.
  • the bandwidth of the filter with a wider bandwidth may be 1 MHz.
  • the signal processing circuit 20 is respectively connected with each receiving circuit 10, and it is used to detect whether there is a strong carrier signal in the multi-carrier signal, and when there is a strong carrier signal in the multi-filtered signal, control the selection circuit in at least two receiving circuits 10 122 selects one of the filters 121 to be connected to the processing circuit 11, so that the strong carrier signal and other carrier signals in the multi-carrier signal are filtered through different filters 121 respectively, and the other carrier signals are except for the strong carrier signal in the multi-carrier signal
  • a strong carrier signal is a carrier signal with a signal strength greater than a preset signal strength, and the preset signal strength can be a signal strength threshold set according to experience or application needs, for example: -30dBm.
  • the detection of the signal strength of the multi-carrier signal is essentially the detection of the signal strength of the filtered signal output by the receiving circuit 10, that is, after the signal processing circuit 20 receives the filtered signal output by the receiving circuit 10, it The signal strength of the filter signal is detected, and the signal strength of the filtered signal is compared with the preset signal strength. If it is judged that the signal strength of the filtered signal is greater than the preset signal strength, it indicates that one of the received multiple carrier signals has a lower signal strength. Large signal, in order to reduce the impact of this strong signal on other carrier signals, the signal processing circuit 20 generates a control signal, and sends the control signal to the filter switching circuit 12 to filter the intermediate frequency signal in the filter switching circuit 12 The device 121 switches.
  • an appropriate filter 121 can be selected according to the frequency interval between the highest frequency of the carrier signal and the lowest frequency of the carrier signal, for example: assuming that the highest frequency and the lowest frequency If the frequency interval is about 1 MHz, then the filter 121 with a filter bandwidth of 1 MHz can be used to filter the multi-carrier signal.
  • the filter in the IF receiving circuit is a broadband filter, which has no suppression effect on the useful or interfering signals in the band.
  • the solution provided in this embodiment has different design features on the IF receiving path. Multiple filters with filtering bandwidth, according to the signal strength of the carrier signal in the multi-carrier signal and the bandwidth of the carrier signal, select the appropriate filter to filter the intermediate frequency signal, and play a certain role in the signal outside the passband of the filter.
  • the suppression effect (above 30dB) reduces the influence of interference signals, and can improve the dynamic range of the receiver, better meet the application scenarios such as vehicle or portable, and improve the applicability of the product.
  • FIG. 3 is a schematic structural diagram of another embodiment of a multi-carrier receiver provided by the present application.
  • the multi-carrier receiver includes: a plurality of receiving circuits 10 , a signal processing circuit 20 and an antenna 30 .
  • the antennas 30 are respectively connected to a plurality of receiving circuits 10 , and are used to transmit received multi-carrier signals to the plurality of receiving circuits 10 .
  • Each receiving circuit 10 is connected to the antenna 30, which includes a processing circuit 11, a filter switching circuit 12 and an ADC 13.
  • the processing circuit 11 is used for down-converting the multi-carrier signal to obtain an intermediate frequency signal.
  • the processing circuit 11 includes: a first amplifier 111, a digital step attenuator (Digital Step Attenuator, DSA) 112, a fourth filter 113, a second amplifier 114, a fifth filter 115, Local oscillator 116 and mixer 117, first amplifier 111 is connected with antenna 30, and it can be low noise amplifier (Low Noise Amplifier, LNA), and it is used for amplifying carrier signal; DSA 112 is output to first amplifier 111
  • the carrier signal of the fourth filter 113 is attenuated; the fourth filter 113 filters the carrier signal of the DSA 112 output; the second amplifier 114 amplifies the carrier signal of the fourth filter 113 output; the fifth filter 115 outputs the second amplifier 114
  • the carrier signal is filtered; the local oscillator 116 is used to generate a local oscillator signal; the mixer 117 is used to mix the local oscillator signal and the carrier signal output
  • the local oscillator 116 can also be shared by multiple receiving circuits 10, that is, the local oscillator 116 is connected to the mixer 117 in each processing circuit 11, so that one local oscillator 116 is used to generate a local oscillator signal, which helps to reduce the overall volume of the circuit and lower the cost.
  • the filter switching circuit 12 includes a plurality of filters 121 with different filter bandwidths and a selection circuit 122 , and the selection circuit 122 includes a first selection circuit 1221 and a second selection circuit 1222 .
  • the first selection circuit 1221 is connected to the processing circuit 11 and the signal processing circuit 20, and is used to select the filter 121 corresponding to the first control signal and connect the intermediate frequency signal to The signal is transmitted to the filter 121, so that the filter 121 filters the intermediate frequency signal to obtain a filtered signal.
  • the second selection circuit 1222 is connected to the signal processing circuit 20, and is used for selecting the filter 121 corresponding to the first control signal to be connected to the signal processing circuit 20 after receiving the second control signal output by the signal processing circuit 20, that is, the second The filter 121 selected by the first selection circuit 1221 is the same as the filter 121 selected by the second selection circuit 1222 , so as to transmit the filtered signal filtered by the filter 121 to the signal processing circuit 20 .
  • the first selection circuit 1221 is a first single-pole multi-throw switch
  • the first single-pole multi-throw switch includes a first input terminal and a plurality of first output terminals (not marked in the figure), the first input terminal is connected to the processing circuit 11, and a plurality of first output terminals are respectively connected to the filter 121, that is, a plurality of first output terminals are in one-to-one correspondence with a plurality of filters 121
  • the second selection circuit 1222 is a second single-pole multi-throw switch
  • the second single-pole multi-throw switch includes multiple second input terminals and second output terminals (not marked in the figure), and the multiple second input terminals are respectively connected to the filter 121, that is, multiple second input terminals and multiple filter terminals 121 correspond to each other, and the second output terminal is connected to the signal processing circuit 20 .
  • FIG. 4 uses an example in which the number of filters 121 is three for illustration, but it is not limited thereto, and the number of filters 121
  • the ADC 13 is used to perform analog-to-digital conversion processing on the filtered signal to obtain a digital signal, which is a digital intermediate frequency signal.
  • the receiving circuit 10 also includes a third amplifier 14 and a sixth filter 15 arranged between the filter switching circuit 12 and the ADC 13, the third amplifier 14 can be an adjustable gain amplifier (Variable Gain Amplifier, VGA), to amplify the filter signal; the sixth filter 15 can be a BPF, to filter the filter signal output by the VGA, and filter out the interference signal.
  • VGA adjustable Gain Amplifier
  • the signal processing circuit 20 is connected with the receiving circuit 10, and it is used to detect the signal strength of the carrier signal.
  • the control processing circuit 11 is connected with the corresponding filter 121, so that the strong carrier signal
  • the other carrier signals in the multi-carrier signal are filtered through different filters 121 respectively.
  • the signal processing circuit 20 is a digital processing chip, as shown in Figure 4, the digital processing chip is connected with the ADC 13 and the selection circuit 122, and the digital processing chip is used to identify the signal strength of the digital signal.
  • the signal processing circuit 20 is also used to judge whether the frequency of the strong carrier signal is the minimum or maximum value of the frequency of the carrier signal in the multi-carrier signal, obtain the judgment result and control the filter switching circuit 12 based on the judgment result.
  • the signal processing circuit 20 is used to control the selection circuit 122 in one of the receiving circuits 10 to select from multiple Select the filter 121 with the widest bandwidth in the device 121 to be connected to the processing circuit 11 to obtain a filter signal corresponding to a strong carrier signal, and control the selection circuit 122 in another receiving circuit 10 to select from multiple filters 121 and multi-carrier A filter 121 matching the bandwidth of other carrier signals in the signal is connected to the processing circuit 11 to obtain filtered signals corresponding to other carrier signals in the multi-carrier signal.
  • multiple receiving circuits 10 include a first receiving circuit and a second receiving circuit (not shown in the figure), and multiple filters 121 with different filtering bandwidths include a first filter and a second filter (not shown in the figure), the filtering bandwidth of the first filter is greater than the filtering bandwidth of the second filter; the first receiving circuit is used to demodulate the strong carrier signal, and the signal processing circuit 20 is used to control the first receiving circuit
  • the processing circuit 11 is connected with the first filter in the first receiving circuit; the second receiving circuit is used to demodulate at least part of the carrier signal except the strong carrier signal, and the signal processing circuit 20 is used to control the second receiving circuit
  • the processing circuit 11 in is connected to the second filter in the second receiving circuit.
  • multiple receiving circuits 10 also include a third receiving circuit (not shown in the figure), and multiple filters 121 with different filtering bandwidths also include a third filter (not shown in the figure) , the filtering bandwidth of the second filter is greater than the filtering bandwidth of the third filter, the carrier signal with a frequency greater than that of the strong carrier signal in the multi-carrier signal is recorded as the first carrier signal, and the frequency in the multi-carrier signal is smaller than that of the strong carrier signal The carrier signal of the frequency is denoted as the second carrier signal.
  • the signal processing circuit 20 is also used to control the selection circuit 122 in one of the receiving circuits 10 (i.e.
  • the filter 121 selected to match the bandwidth of the first carrier signal is connected to the processing circuit 11 to obtain a filter signal corresponding to the first carrier signal, and to control another receiving circuit 10 ( That is, the selection circuit 122 in the second receiving circuit) selects the first filter to be connected to the processing circuit 11, obtains a filter signal corresponding to a strong carrier signal, and is used to control the filter signal in another receiving circuit 10 (that is, the third receiving circuit)
  • the selection circuit 122 selects the filter 121 matching the bandwidth of the second carrier signal from the first filter and the second filter and connects it to the processing circuit 11 to obtain a filtered signal corresponding to the second carrier signal.
  • the signal processing circuit 20 is also used to control the selection circuit 122 in one of the receiving circuits 10 to select the filter with the widest bandwidth from multiple filters when there is no strong carrier signal in the multi-carrier signal.
  • the device is connected with the processing circuit 11 to obtain the filtered signal corresponding to the multi-carrier signal.
  • the number of receiving circuits 10 is determined by the number of carrier signals and the number of demodulated signals that need to be obtained. For example, if the number of carrier signals is greater than 3, then the number of receiving circuits 10 is at least 3 and less than or equal to The quantity of carrier signal, if only in order to separate strong signal from other carrier signals, then the quantity of demodulation signal is at most 3, can only set 3 receiving circuits 10 at this moment, if for strong signal and other carrier signal If the carrier signals of different frequency bands or each carrier signal of other carrier signals are demodulated separately, more receiving circuits 10 need to be provided to obtain a corresponding number of demodulated signals.
  • the multiple receiving circuits 10 also include a fourth receiving circuit (not shown in the figure), the fourth receiving circuit is connected to the signal processing circuit 20, and it is used to scan and monitor whether there is a strong carrier signal, and Feedback to the processing circuit 20, the working principles of the first to fourth receiving circuits will be described in detail below.
  • a multi-carrier signal includes 4 carrier signals, and the frequency interval between two adjacent carrier signals is 250KHz.
  • the filtering bandwidth of the first filter is 5MHz
  • the filtering bandwidth of the second filter is 1MHz
  • the filtering bandwidth of the third filter is 150KHz.
  • combination 1 and combination 4 can be classified into the same category (combination A), and combination 2 and combination 3 can be classified into the same category (combination B).
  • the first to fourth receiving circuits all select the second filter to be connected to the processing circuit 11 and the signal processing circuit 20 through the selection circuit 122, that is, select a filter with a wider bandwidth (ie, the second filter) for filtering , receiving the multi-carrier signal and the second filter can guarantee the integrity of the received carrier signal by four receiving circuits; then, the signal processing circuit 20 detects the signal strength of the carrier signal and determines whether the The filters in the first to third receiving circuits are switched, and the specific processing process is as follows.
  • Figure 6 is a simplification of Figure 3, omitting other circuit elements in Figure 3 except the filter and signal processing circuit, the RXD2 receiving channel where the fourth receiving circuit (not marked in the figure) is used for Scan to monitor whether there is a strong carrier signal, and use the second filter for filtering, that is, use a filter with a wider bandwidth, so that all carrier signals can pass through; when there is no strong carrier signal, for example, as shown in Figure 7 It shows that the signal strengths corresponding to the carrier signals f1-f4 are all lower than the preset signal strength; the four carrier signals are demodulated according to the normal receiving mode, and the carrier signals are demodulated through the RX-Main receiving channel where the first receiving circuit is located, and use The first filter performs filtering to ensure that more carrier signals pass through, thereby improving the sensitivity of the receiver.
  • the RXD2 receiving channel where the fourth receiving circuit is located is used to scan and monitor whether there is a strong carrier signal, and use the second filter for filtering; taking the combination 1 shown in Figure 5 as an example, when a strong carrier signal appears , the four carrier signals are respectively demodulated by different receiving channels, the strong carrier signal f1 enters the RX Main receiving channel where the first receiving circuit is located for demodulation, the first filter is selected, and the carrier signals f2-f4 pass through the second receiving circuit where The RXD0 receiving channel is demodulated, and the second filter is used for filtering to ensure that the carrier signals f2-f4 can all pass through.
  • the RXD2 receiving channel where the fourth receiving circuit is located is used to scan and monitor whether there is a strong carrier signal, and use the second filter for filtering; taking the combination 2 shown in Figure 5 as an example, when a strong carrier signal appears , the four carrier signals are respectively demodulated by different receiving channels, the normal carrier signal f1 enters the RX Main receiving channel where the first receiving circuit is located for demodulation, and is filtered by the third filter to filter out other carrier signals, Reduce interference; the strong carrier signal f2 enters the RXD0 receiving channel where the second receiving circuit is located for processing, and uses the first filter for filtering; the normal carrier signal f3-f4 enters the RXD1 receiving channel where the third receiving circuit is demodulated, and uses The second filter performs filtering to ensure that the carrier signals f3-f4 can all pass through.
  • the technical solution provided by this embodiment can improve product performance, increase the dynamic range of the receiver, and solve the problem of near-far effect in multi-carrier receivers, so that in the application scenarios of integrated vehicle, portable, etc., there will be no blocking caused by strong signals
  • the sensitivity is reduced to avoid problems such as dropped words or no voice in the remote handset.
  • FIG. 10 is a schematic flowchart of an embodiment of a multi-carrier receiving method provided by the present application. The method is applied to the multi-carrier receiver in the above-mentioned embodiment.
  • Step 101 Using a processing circuit to down-convert the multi-carrier signal to obtain an intermediate frequency signal.
  • Step 102 Using a selection circuit to select one filter from a plurality of filters to filter the intermediate frequency signal.
  • the first to fourth receiving circuits all select the second filter to be connected to the processing circuit and the signal processing circuit through the selection circuit, that is, select a filter with a wider bandwidth for filtering, and pass through the four receiving circuits Receiving multi-carrier signals and selecting a filter with a wider bandwidth can ensure the integrity of the received carrier signal.
  • Step 103 Use the signal processing circuit to detect the carrier signal with the strongest signal strength among the multi-filtered signals, and record it as a strong carrier signal.
  • Step 104 When there is a strong carrier signal in the multi-carrier signal, control the selection circuits in at least two receiving circuits to select one of the filters to be connected to the processing circuit, so that the strong carrier signal and other carrier signals in the multi-carrier signal pass through respectively Different filters are used for filtering.
  • a strong carrier signal is a carrier signal whose signal strength is greater than a preset signal strength.
  • the structure and working principle of the multi-carrier receiver are the same as those of the above-mentioned embodiment of the multi-carrier receiver, and will not be repeated here.
  • This embodiment provides a method for improving the dynamic range of a wideband receiver.
  • a plurality of filter channels with different filter bandwidths are designed. According to the difference between the highest frequency of the carrier signal and the lowest frequency of the carrier signal, The frequency difference between them, select the appropriate filter channel to process the carrier signal, and suppress the signal outside the passband of the filter, thereby improving the dynamic range of the receiver and the in-band blocking index, which can be applied to the transceiver in the communication system transmitter or multicarrier receiver.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente demande divulgue un procédé de réception multiporteuse et un récepteur multiporteuse. Le récepteur multiporteuse comprend un circuit de traitement de signal et une pluralité de circuits de réception, un circuit de réception comprend un circuit de traitement et un circuit de commutation de filtrage, et le circuit de traitement effectue une conversion descendante sur un signal multiporteuse pour obtenir un signal de fréquence intermédiaire. Le circuit de commutation de filtrage comprend un circuit de sélection et une pluralité de filtres, la pluralité de filtres ont chacun une largeur de bande de filtre différente, et le circuit de sélection sélectionne un filtre pour filtrer le signal de fréquence intermédiaire. Le circuit de traitement de signal détecte si un signal de porteuse puissant existe dans le signal multiporteuse ou non, et lorsque le signal de porteuse puissant existe dans le signal multiporteuse, les circuits de sélection dans au moins deux circuits de réception sont commandés pour sélectionner l'un des filtres à connecter au circuit de traitement, de sorte que le signal de porteuse puissant et d'autres signaux de porteuse dans le signal multiporteuse sont filtrés au moyen de différents filtres, respectivement, et le signal de porteuse puissant est un signal de porteuse dont l'intensité de signal est supérieure à une intensité de signal prédéfinie. Au moyen du procédé ci-dessus, la présente demande peut améliorer une plage dynamique du récepteur.
PCT/CN2021/134462 2021-11-30 2021-11-30 Procédé de réception multiporteuse et récepteur multiporteuse WO2023097461A1 (fr)

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Cited By (1)

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CN117998227A (zh) * 2024-04-02 2024-05-07 杭州海康威视数字技术股份有限公司 一种对讲系统、方法及装置

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CN103947121A (zh) * 2011-11-17 2014-07-23 美国博通公司 用于非连续载波聚合方案的接收机
US20210168003A1 (en) * 2019-12-03 2021-06-03 Harris Global Communications, Inc. Communications system having multiple spread carriers and associated methods

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Publication number Priority date Publication date Assignee Title
US20030216122A1 (en) * 2002-05-17 2003-11-20 Cordone Sean S. Multiple carrier adaptive notch filter
CN1777073A (zh) * 2004-11-15 2006-05-24 中兴通讯股份有限公司 实现多载波接收信号强度指示的装置
CN103947121A (zh) * 2011-11-17 2014-07-23 美国博通公司 用于非连续载波聚合方案的接收机
US20210168003A1 (en) * 2019-12-03 2021-06-03 Harris Global Communications, Inc. Communications system having multiple spread carriers and associated methods

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