CN1235388A - 分集式天线系统 - Google Patents

分集式天线系统 Download PDF

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Publication number
CN1235388A
CN1235388A CN99104705A CN99104705A CN1235388A CN 1235388 A CN1235388 A CN 1235388A CN 99104705 A CN99104705 A CN 99104705A CN 99104705 A CN99104705 A CN 99104705A CN 1235388 A CN1235388 A CN 1235388A
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level
branch
value
gap
calculate
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CN99104705A
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蒂莫西·詹姆斯·思帕特
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Nokia of America Corp
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Lucent Technologies Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0845—Weighted combining per branch equalization, e.g. by an FIR-filter or RAKE receiver per antenna branch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2682—Time delay steered arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

为了减少多路径传播的影响,提出了分集式天线系统,其中阵列中的每个天线有各自的分支抽头延迟线,在此延迟线中各抽头输出信号被加权并相加。然后,和值需要按照提高信噪比的方式加以合并。披露一个这样的分集式天线系统,其中每个分支的分支权重W1S至WMS是按照一定的方法确定。

Description

分集式天线系统
本发明涉及分集式天线系统。
本发明的背景说明参照蜂窝式移动电话系统，例如，GSM。读者可以容易地想到其他的应用。
上行线路通信因多路径传播，采用相同信道干扰的移动站，和综合噪声而质量下降。为了减少多路径传播的影响，已建议采用分集式天线，其中一个阵列的每个天线有各自的分支抽头延迟线，在此延迟线中抽头输入信号被加权并相加。然后，和值需要按照提高信噪比的方式加以合并。常规的合并技术依赖于信道响应的估算，并称之为最大比率合并(maximal ratio combining)。脉冲响应测量可能不精确，导致次最佳合并。
按照本发明提供这样一个分集式天线系统，它包括：天线阵列，每个天线有各自的分支抽头延迟线，在此延迟线中分支抽头输出信号被抽头权重加权并相加；加权装置，对每个分支延迟线和值加上分支权重；和求和装置，对加权的和值求和，每个分支的分支权重是这样确定的：
把分支的相加的分支输出信号的实部与设定电平进行比较；
把逻辑0符号值赋予落在设定电平一侧的那些相加的分支抽头输出信号，以及把逻辑1符号值赋予落在该设定电平另一侧的那些相加的分支抽头输出信号；
计算赋予逻辑0值的那些信号的电平的平均值，以及计算赋予逻辑1值的那些信号的电平的平均值；
计算赋予逻辑0值的每个信号的电平与相应平均值之间的差距，以及计算赋予逻辑1值的每个信号的电平与相应平均值之间的差距；
计算与平均值之间的差距的和；
计算所有信号的电平与设定电平之间的差距；
计算所有信号电平与设定电平之间的差距的和；
计算与平均值之间差距的和对所有符号电平与设定电平之间差距的和之比率；
设定取决于该比率之倒数的分支权重。
最好是，抽头权重是这样设定，使每个分支抽头延迟线是一个匹配滤波器。
现在，结合附图描述本发明的一个实施例，这些附图是：
图1是自适应天线系统及其抽头延迟线的示意图；和
图2是在训练序列期间从接收器输出的信号的电平示范图。
参照这两个附图，M个天线的阵列中每个天线2连接到各自的接收器4。被此阵列接收的信号是高斯最小频移键控(GMSK)调制信号。这些信号被消旋(de-rotated)以去除加到GMSM调制中的差分相位编码。从每个接收器输出的消旋信号被馈入到各自的抽头延迟线6，此延迟线可以是物理的或是由一个或多个处理器模拟的。在每个抽头中，信号被权重设定装置8加上各自的权重W11至Wm1，并在加法器12中相加。从每个均衡器输出的和值在加法器28中相加。
每个分支中的权重通过传统的滑动相关技术计算，导致一个匹配滤波器过程，即，权重的设置使它们与在每个分支中测得的信道状态相匹配。
赋予逻辑0或逻辑1的符号值的临时判定取决于加法器12的输出y1至ym的实部的电平是正或负。因此，设定的零判定电平16(见图2)把逻辑0符号电平18与逻辑1符号电平20区分开。
计算设定电平16与赋予逻辑0值的各符号电平18之间的差距d0的平均值22。计算设定电平16与赋予逻辑1值的各符号电平20之间的差距d1的平均值24。
计算赋予逻辑0值的每个符号电平18与相应平均值22之间的差距。计算赋予逻辑1值的每个符号电平24与相应平均值24之间的差距。
计算所有与平均值之间的差距的和。
计算所有符号电平与设定判定电平16之间的差距。
计算所有符号电平与设定判定电平16之间的差距的和。
计算与平均值之间的差距的和对所有符号电平与设定电平之间的差距的和之比率(品质因素比率)。这个比率越小，分支响应中的置信度越好。有m个计算出的品质因素比率。
加法器12产生的和值自身被权重设置器26中的权重W1S至WMS加权，再在加法器28中相加。这些权重正比于各个分支的品质因素比率之倒数。

Claims (2)

1．一种分集式天线系统，包括：天线阵列，每个天线有各自的分支抽头延迟线，在此延迟线中分支抽头输出信号被加上抽头权重并相加；加权装置，对每个分支延迟线之和值加上分支权重；以及求和装置，对加权的和值相加，每个分支的分支权重由以下确定：
把分支的相加的抽头输出信号的实部与设定电平进行比较；
把逻辑0符号值赋予落在该设定电平一侧的那些相加分支抽头输出信号，以及把逻辑1符号值赋予落在该设定电平另一侧的那些相加分支抽头输出信号；
计算赋予逻辑0值的那些信号的电平的平均值，以及计算赋予逻辑1值的那些信号的电平的平均值；
计算赋予逻辑0值的每个信号的电平与相应平均值之间的差距，以及计算赋予逻辑1值的每个信号的电平与相应平均值之间的差距；
计算与平均值之间差距的和；
计算所有信号的电平与设定电平之间的差距；
计算所有信号的电平与设定电平之间的差距的和；
计算与平均值之间的差距的和对所有符号的电平与设定电平之间的差距的和之比率；和
设定取决于该比率之倒数的分支权重。
2．按照权利要求1的天线系统，其中抽头权重是这样设定，使每个分支抽头延迟线是一个匹配滤波器。
CN99104705A 1998-04-03 1999-04-01 分集式天线系统 Pending CN1235388A (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP98302654.3 1998-04-03
EP98302654A EP0948081A1 (en) 1998-04-03 1998-04-03 Diversity antenna system

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CN1235388A true CN1235388A (zh) 1999-11-17

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EP (1) EP0948081A1 (zh)
JP (1) JP3634661B2 (zh)
KR (1) KR100337249B1 (zh)
CN (1) CN1235388A (zh)
AU (1) AU721254B2 (zh)
BR (1) BR9901219A (zh)
CA (1) CA2265208C (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1780272B (zh) * 2004-11-19 2011-01-05 上海宣普实业有限公司 路径合并和相关的方法

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KR100322021B1 (ko) * 1999-03-22 2002-03-20 윤종용 다이버시티 안테나간의 이격거리 결정방법

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GB2229580B (en) * 1989-02-08 1993-07-21 Stc Plc Adaptive array processor
EP0449327B1 (en) * 1990-03-30 1998-07-15 Nec Corporation Noise-immune space diversity receiver
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JP2982504B2 (ja) * 1992-07-31 1999-11-22 日本電気株式会社 適応受信機
JP2780576B2 (ja) * 1992-08-05 1998-07-30 日本電気株式会社 干渉波除去装置
US5481570A (en) * 1993-10-20 1996-01-02 At&T Corp. Block radio and adaptive arrays for wireless systems
US5724390A (en) * 1994-03-02 1998-03-03 Lucent Technologies Inc. MLSE before derotation and after derotation
US5550872A (en) * 1994-10-24 1996-08-27 Motorola, Inc. Method and apparatus for Fast Fourier Transform based maximal ratio combining
JPH08298483A (ja) * 1995-04-27 1996-11-12 Matsushita Electric Ind Co Ltd ダイバーシチ受信装置
AT408933B (de) * 1996-05-20 2002-04-25 Josef Dipl Ing Fuhl Verfahren und vorrichtung zur erhöhung der teilnehmerkapazität von zellularen mobilfunknetzen

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1780272B (zh) * 2004-11-19 2011-01-05 上海宣普实业有限公司 路径合并和相关的方法

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JP3634661B2 (ja) 2005-03-30
US6104768A (en) 2000-08-15
CA2265208C (en) 2001-05-08
KR100337249B1 (ko) 2002-05-17
AU2353999A (en) 1999-10-14
AU721254B2 (en) 2000-06-29
EP0948081A1 (en) 1999-10-06
JP2000013291A (ja) 2000-01-14
CA2265208A1 (en) 1999-10-03
BR9901219A (pt) 2000-02-01
KR19990082829A (ko) 1999-11-25

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