CN1768483A - 用于接收模拟接收信号的接收单元和方法 - Google Patents

用于接收模拟接收信号的接收单元和方法 Download PDF

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CN1768483A
CN1768483A CNA2004800090657A CN200480009065A CN1768483A CN 1768483 A CN1768483 A CN 1768483A CN A2004800090657 A CNA2004800090657 A CN A2004800090657A CN 200480009065 A CN200480009065 A CN 200480009065A CN 1768483 A CN1768483 A CN 1768483A
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receiving
receiving element
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J·帕斯索克
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Robert Bosch GmbH
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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
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • H04B1/0007—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
    • 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
    • H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
    • 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
    • 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
    • H04B1/006—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 switches 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • H04B1/28—Circuits for superheterodyne receivers the receiver comprising at least one semiconductor device having three or more electrodes
    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
    • H04B1/406—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency with more than one transmission mode, e.g. analog and digital modes

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Superheterodyne Receivers (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

具有至少两个用于模拟接收信号的信号接收机(2a，2b，2c)、用于将模拟接收信号转换成数字接收信号的模数转换器(ADC)、和用于数字接收信号的信号处理单元(12)的接收单元(1)，具有至少一个位于信号接收机(2a，2b，2c)的输出端上的、用于将模拟接收信号相加的加法器(11)，其中该加法器(11)以其输出端连接到共同的模数转换器(ADC)的输入端上，并且信号处理单元(12)被构造用于使所相加的接收信号分离。

Description

用于接收模拟接收信号的接收单元和方法
本发明涉及一种接收单元，该接收单元具有至少两个按照数字或模拟标准的用于模拟接收信号的信号接收机，具有用于将模拟接收信号转换成数字接收信号的模数转换器，以及具有用于数字接收信号的信号处理单元。
本发明还涉及一种用于利用这种接收单元接收模拟接收信号、尤其是无线电广播信号的方法。
用于接收调幅(AM)和调频(FM)接收信号的常规的无线电广播接收机常常具有多于一个的信号接收机，例如以便在第一频道上接收音频信号，而同时在第二频道上接收数据。例如可以按照无线电数据标准(RDS)来对数据进行编码，或在交通消息频道(Traffic MessageChannel，TMC)中传输数据。也可以将多个信号接收机用于利用接收设备来接收诸如调频(FM)、数字音频广播(DRB)、数字无线电广播调制(Digital Radio Mondiale，DRM)、带内同频(In Band on Channel，IBoC)或卫星数字音频无线电业务(SDARS)的多种无线电广播标准。在这里，同时的数据和音频信号接收也是可以设想的。也可以将多个信号接收机用于观察分别可接收的发送机地形。如果在一种标准中发送机的信号质量下降了，则可以转接到具有另一个发送机的相同内容的发送机上。
模拟接收信号利用信号接收机由天线来接收，并且在带通滤波之后在前置放大级中被放大。经带通滤波和放大的模拟接收信号利用由振荡器控制的混频器而被混频到中间频率上，进行中间频率滤波，并且再次被放大。在信号接收机中如此被处理的模拟接收信号分别利用针对每个信号接收机的模数转换器而转换成数字接收信号，并且在随后的信号处理单元中以数字方式进行进一步处理。在此情况下，对模数转换器的性能要求是比较高的。模数转换器应该具有高的扫描速度、大的动态性能和尽可能小的消耗功率，并且可以尽可能与其它的功能一起集成到集成电路中。
但是多个模数转换器目前所需要的芯片面积和消耗功率太大。
所以，本发明的任务是提供一种改进的接收单元，利用该接收单元可以降低模数转换器的芯片面积、成本和功率需求。
利用根据本发明的那种类型的接收单元通过以下方式来解决该任务，即将至少一个加法器连接到信号接收机的输出端上，以便将模拟接收信号相加。加法器利用其输出端连接到共同的模数转换器的输入端上。在此，随后的信号处理单元被构造用于使所相加的接收信号分离。
因此建议将一个共同的模数转换器用于多个信号接收机，其中事先将各个模拟接收信号累加，并且稍后在数字部分中使所累加的共同的数字接收信号重新分离。
这具有以下优点，即仅仅需要一个唯一的模数转换器。尤其是当将具有不同接收频率的模拟接收信号累加时，在数字部分中能够很容易地实现分离。然后可以由信号处理单元借助频道滤波很容易滤出这些接收频率。
为此，如果信号接收机具有用于将模拟接收信号混频到不同的中间频率上的混频器，则是有利的。
在此情况下，至少一个信号接收机应该被构造用于将模拟接收信号混频到中间频率上，并且至少一个另外的信号接收机应该被构造用于接收和滤波规定的接收频带，以及将该接收频带加到中间频率信号上。以此方式可以容易地在数字信号接收机中使中间频率信号与其余的接收频带分离。通过所规定的接收频带的数字化，能够容易地进一步观察发送机地形以及从该接收频带中提取数据。
此外，如果将多个信号接收机设置用于同时接收在不同的频道上的和/或按照不同的发送标准的模拟接收信号，则是有利的。因此可以接收不同的接收频道和不同的标准，并且在接收单元的数字部分中进一步处理。
此外，本发明的任务是提供一种用于接收模拟接收信号的改进的方法，该方法对于接收单元要求较小的花费。该任务利用这种类型的方法通过以下步骤来解决：
-同时接收多个模拟接收信号，
-将模拟接收信号相加，
-对相加接收信号进行模数转换，以及
-将数字相加接收信号分成与多个模拟接收信号相对应的多个数字接收信号。
以下示范性地借助附图来详细阐述本发明。
图1展示了具有多个信号接收机和分别用于每个信号接收机的模数转换器的常规接收单元的框图；
图2展示了具有多个信号接收机和一个共同的模数转换器的本发明接收单元的框图。
从图1中可以看出常规接收单元的框图，该接收单元用于同时接收在相同或不同接收频道上的和/或按照相同发送标准的多个模拟接收信号。每个信号接收机2具有包括带通滤波器4和前置放大器5的前置放大级3。前置放大级3的输入端被连接到天线6上，而前置放大级3的输出端分别被连接到混频器7上。通过振荡器8来控制混频器7，以便将模拟接收信号混频到中间频率ZF上。中间频率信号ZF在中间频率滤波器9中被滤波，并且随后利用放大器10来放大。
每个信号接收机2a具有模数转换器ADC，以便将所放大的模拟的中间频率信号转换成数字接收信号，并且随后利用未示出的信号处理单元以数字方式进行进一步处理。
从图2中可以看出具有三个信号接收机2a、2b和2c的本发明接收单元的框路。两个信号接收机2a和2b以已知的方式具有前置放大级3、带有振荡器8的混频器7、中间频率滤波器9和放大器10。第三信号接收机2c仅仅具有包括带通滤波器4和前置放大器5的前置放大级3，使得在接收频率上、而不是在中间频率ZF上转送由带通滤波器4所规定的接收频带。于是在相应的频率上利用加法器11将模拟接收信号累加成一个共同的模拟接收信号，其中应采用不同的中间频率ZF1和ZF2，以便稍后能够容易地通过数字频道滤波来划分该共同的接收信号。
利用一个共同的模数转换器ADC将相加接收信号转换成数字接收信号，并且在随后的数字信号处理单元12中进行处理。在数字信号处理单元12中通过频道滤波来重新划分各个接收信号。

Claims (5)

1.一种接收单元，具有至少两个用于模拟接收信号的信号接收机(2a，2b，2c)、用于将所述模拟接收信号转换成数字接收信号的模数转换器(ADC)、和用于所述数字接收信号的信号处理单元(12)，其特征在于至少一个位于所述信号接收机(2a，2b，2c)的输出端上的、用于将所述模拟接收信号相加的加法器(11)，其中所述加法器(11)以其输出端连接到共同的模数转换器(ADC)的输入端上，并且所述数字信号处理单元(12)被构造用于使所相加的接收信号分离。
2.按权利要求1的接收单元，其特征在于，所述信号接收机(2)具有用于将所述模拟接收信号混频到不同的中间频率(ZF)上的混频器(7)。
3.按权利要求1或2的接收单元，其特征在于，至少一个信号接收机(2a，2b)被构造用于将模拟接收信号混频到中间频率(ZF)上，而至少一个另外的信号接收机(2c)被构造用于接收和滤波所规定的接收频带，以及将该接收频带加到中间频率信号上。
4.按上述权利要求之一的接收单元，其特征在于，所述多个信号接收机(2)被设置用于同时接收在不同频道上的和/或按照不同的发送标准的模拟接收信号。
5.用于利用按上述权利要求之一的接收单元来接收模拟接收信号、尤其是无线电广播信号的方法，其特征在于，
-同时接收多个模拟接收信号，
-将所述模拟接收信号相加，
-对相加接收信号进行模数转换，以及
-将数字相加接收信号分成与所述多个模拟接收信号相对应的多个数字接收信号。
CNA2004800090657A 2003-04-04 2004-02-27 用于接收模拟接收信号的接收单元和方法 Pending CN1768483A (zh)

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DE10315408A DE10315408A1 (de) 2003-04-04 2003-04-04 Empfangseinheit und Verfahren zum Empfangen einer analoger Empfangssignale
DE10315408.6 2003-04-04

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CN103684568A (zh) * 2012-09-12 2014-03-26 罗伯特·博世有限公司 接收系统

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CN103684568A (zh) * 2012-09-12 2014-03-26 罗伯特·博世有限公司 接收系统
CN103684568B (zh) * 2012-09-12 2018-04-24 罗伯特·博世有限公司 接收系统

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