CN100409582C - 无线通信系统接收器阵列 - Google Patents

无线通信系统接收器阵列 Download PDF

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CN100409582C
CN100409582C CNB2003801056451A CN200380105645A CN100409582C CN 100409582 C CN100409582 C CN 100409582C CN B2003801056451 A CNB2003801056451 A CN B2003801056451A CN 200380105645 A CN200380105645 A CN 200380105645A CN 100409582 C CN100409582 C CN 100409582C
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sampling
receiver array
path
filter
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CN1723626A (zh
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G·里普马
E·瓦格纳
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Infineon Technologies AG
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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
    • H04B1/0021—Decimation, i.e. data rate reduction techniques
    • 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
    • H04B1/001—Channel filtering, i.e. selecting a frequency channel within the SDR system
    • 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
    • H04B1/0028—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 baseband stage
    • H04B1/0039—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 baseband stage using DSP [Digital Signal Processor] quadrature modulation and demodulation
    • 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

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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

一种无线通信系统接收器阵列，具有一模拟射频输入区段(13)且具有被从此向下游连接的一数字信号处理装置(5)，其中该数字信号处理装置(5)系具有一模拟/数字转换器(7)，之后为一数字混合级及一取样单元。取样单元的取样因子系可切换来达成各种系统有利实施。

Description

无线通信系统接收器阵列
技术领域
本发明涉及无线通信系统接收器阵列。
背景技术
如欧规数字增强型无线电话系统(DECT)，国际数字通讯技术(WDCT)，蓝芽(Bluetooth)或类似者的无线数字通信系统要求接收器适用于传输及接收经由空气接口被传送且供应基带信号给解调器的射频信号以复杂有利方式尽量不失真。除了高感度的外，此例中亦预期高集成度，低成本，低功率消耗及可应用至不同数字通信系统的弹性。例如，为了开发数字技术，无温度相依的优点，此例中至少部分接收器电路为数字信号处理组件型式。为了促成低成本接收器实施，预期相同接收器支持不同行动无线标准。例如，若可同时使用欧规数字增强型无线电话系统欧洲电话标准及美国国际数字通讯技术标准的接收器，则可以相当低成本来制造装置。为了集成功能，这些接收器可被设计为具有低中频(低IF)的接收器。
先前接收器概念使用一装置中的独立接收模块或不同标准的独立完整接收器单元。可替代的是，电路被用于提供不同接收频宽间的复杂切换的模拟侧上。例如，欧规数字增强型无线电话系统例中之中频为频道分隔的一半，而国际数字通讯技术例中其使用全部频道分隔。因为欧规数字增强型无线电话系统例中的频道分隔为国际数字通讯技术的频道分隔的一半，所以中频相同被明定为864kHz。因此，针对被预期接收两系统的接收器，必须可以用于滤波器及解调器的相同中频来切换频宽。即使于数字实施中，频宽都必须可以相同中频作切换。然而，固定中频亦视保持不变的采样速率而定。因此必须改变滤波器及解调器的系数。
DE 1 006 042 A1揭示以一标准，例如欧规数字增强型无线电话系统标准操作的传统接收器。
发明内容
因此，本发明以提供可以不同标准，最低复杂性操作于通信系统的无线通信系统接收器阵列目的为基础。
依据本发明，此目的由以下的特征来达成。
根据本发明的无线通信系统接收器阵列，具有一模拟射频输入区段且具有被从此向下游连接的一数字信号处理装置，其中该数字信号处理装置具有一模拟/数字转换器，之后为一数字混合级及一取样单元，其中在该取样单元中至共享解调电路的信号路径具有拥有不同取样特性的至少两取样路径，同时一取样路径选择装置被提供，以至少在一第一及一第二取样路径之间进行选择。
提供至少两个取样路径不同取样字符确保可以保证最低复杂性的不同标准对通信系统作数字信号处理。一改进提供第一取样处理被执行于一取样级段，而适用于各标准的该取样处理于细分为不同取样路径之后被执行，其各被与不同标准作连结。
第二实施例中，无先前取样被执行，而各标准所要求的取样被完整执行于各路径中。
最后，本发明提供适当频道滤波器及/或输入放大器被选择于模拟射频输入级及取样路径的选择。
附图说明
本发明将参考附图被详细解释如下，其中：
图1显示无线通信系统接收器阵列的设计方块图，
图2显示第一实施例，及
图3显示第二实施例。
具体实施方式
图1显示供应被接收信号至输入滤波器2的接收天线1方块图。被滤波于输入滤波器2或射频带通滤波器的信号被供应至通常为低噪声滤波器(LNA)的输入放大器。来自输入放大器3的输出信号被供应至第一混合级4，其中复合混合被执行来形成复合中频，其具有其间90度相移的组成I及Q。这两个组成I及Q于通过频道滤波器16之后被供应至数字/模拟转换首先被执行的数字信号处理单元5，之后为该组成I及Q可于输出侧被提供至使用复合组成I及Q来制造实际输出信号OUT的解调器6方式的数字信号处理。
图2显示详细方块图型式的第一实施例。中频fif处的两模拟组成I及Q被供应至数字/模拟转换器7，其于该处被以采样速率fs采集。采样处理以对频道频宽过度采样为基础。
明确地说，此意义如下：依据欧规数字增强型无线电话系统标准的资料速率为Rbits＝1.152Mbit/s。依据国际数字通讯技术标准的资料速率仅为一半，也就是为Rbits国际数字通讯技术＝576Mbit/s。若fs＝72×Rbits的采样速率被提供作为欧规数字增强型无线电话系统标准，则因为资料速率为国际数字通讯技术标准fs＝144×Rbits的一半，所以此对国际数字通讯技术标准产生相同采样速率fs。
数字化I及Q组成接着被供应至具有可将信号转换为所谓基带的复合数字混和器的数字信号处理单元5，使得频宽与中频无关。此避免使用复合带通滤波器，且可使用简单低通滤波器。数字混合级8之后，该信号被供应至取样单元15。
图2所述实施例中，此取样单元15首先具有由因子n执行取样的第一取样级9。视所选择路径而定，信号路径装置11现在从第一取样级9供应输出信号至第二取样级10或至可旁通该第二取样级的旁通14。取样由第二取样级10中的因子m来执行。来自旁通14或第二取样级10的下游再次加入两路径。针对接收器预期不仅顺从欧规数字增强型无线电话系统标准亦顺从国际数字通讯技术标准的特定情况，取样处理使用n＝8被执行于第一取样级9，而使用m＝2被执行于第二取样级10。
针对欧规数字增强型无线电话系统标准，经由信号选择装置11的旁通路径14被选择用于进一步信号处理，使经由8全部取样可被提供给取样单元15。针对国际数字通讯技术标准，经由第二取样级10的路径是经由信号路径选择装置11被选择。此例中，附加取样以m＝2被执行。此产生国际数字通讯技术标准经由16全部取样。因此，用于欧规数字增强型无线电话系统标准及国际数字通讯技术标准的取样单元15端处的信号，具有采样速率对位速率的相同比率。此意指如被执行滤波及均衡的数字滤波器装置12及解调电路6的所有接续功能块可不作任何改变而被使用。此外，虽然此亦设想用于适用于两个或更多标准的先前装置，但射频输入侧上的切换必须被与取样级15的切换平行执行。此意指不仅输入滤波器2必须针对该标准被设定为适当频率及频宽，低噪声输入放大器亦必须被提供对应该被选择标准的适当匹配频宽。此可以不同滤波器及放大器路径视该被选择标准被提供或滤波器及放大器可以适当型式切换的方式来达成。
因为先前实施例已以欧规数字增强型无线电话系统标准及国际数字通讯技术标准基础作说明，现在应提及本发明不仅被限于组合这两标准于一接收器电路中。例如，可使用附加标准或其它标准。此例中，可经由适当选择采样及取样来采用如本发明的概念及/或提供两标准以上的装置。此情况中，附加路径必须被提供对应被要求取样单元15。
基本上对应图2所述实施例的图3所述实施例中，相同部件被提供相同参考符号。说明因其被限制为图3的差异于路径被分割之前并无被用于两标准的取样被执行。
第一取样级9’及第二取样级10’被提供n’及m’个别取样，其中各全部取样处理依据被选择标准来执行。此情况为无论何时，用于其中一标准的取样不为用于个别其它标准的取样倍数。
再次，两个以上路径可被提供于此例中。

Claims (7)

1. 一种无线通信系统接收器阵列，具有一模拟射频输入区段(13)且具有被从此向下游连接的一数字信号处理装置(5)，其中该数字信号处理装置(5)具有一模拟/数字转换器(7)，之后为一数字混合级及一取样单元(15)，其特征为
在该取样单元(15)中至共享解调电路(6)的信号路径具有拥有不同取样特性的至少两取样路径，同时一取样路径选择装置(11)被提供，以至少在一第一及一第二取样路径之间进行选择。
2. 如权利要求1的该接收器阵列，其特征为该至少两取样路径至少其一具有一取样滤波器(10；9’，10’)。
3. 如权利要求1的该接收器阵列，其特征为
该取样路径选择装置(11)之前为一共享取样滤波器(9)。
4. 如权利要求3的该接收器阵列，其特征为该至少两取样路径至少其一具有一取样滤波器(10；9’，10’)。
5. 如权利要求3的该接收器阵列，其特征为该取样路径之一为用于该取样滤波器之一的一旁通路径(14)。
6. 如权利要求1-5中任一项的该接收器阵列，其特征为
该射频输入区段(13)之后为用于不同频道频宽的可切换频道滤波器，而其中被选择频道频宽被与预定取样路径相连结。
7. 如权利要求6的该接收器阵列，其特征为
该频道滤波器(2)之前为一射频输入电路，该射频输入电路的带中频可被调谐至该预定接收频率。
CNB2003801056451A 2002-12-10 2003-12-02 无线通信系统接收器阵列 Expired - Fee Related CN100409582C (zh)

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EP1570580A1 (de) 2005-09-07
DE10257666A1 (de) 2004-08-05
CN1723626A (zh) 2006-01-18
EP1570580B1 (de) 2007-07-25
US20050276351A1 (en) 2005-12-15
WO2004054122A1 (de) 2004-06-24
AU2003292994A1 (en) 2004-06-30

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