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    • 5. 发明申请
    • ANTENNA DIAGRAM SWITCHING FOR IMPROVING THE PROPERTIES OF A RADIO LINK
    • 天线图切换以改善无线电连接功能
    • WO2009019183A2
    • 2009-02-12
    • PCT/EP2008060014
    • 2008-07-30
    • CONTINENTAL AUTOMOTIVE GMBHCHAKAM GUY-AYMARWEINBERGER MARTINSCHAEFER ANDREAS
    • CHAKAM GUY-AYMARWEINBERGER MARTINSCHAEFER ANDREAS
    • H01Q1/32H01Q3/00H01Q7/00H01Q9/16H01Q9/42
    • H01Q1/3241H01Q3/00H01Q7/00H01Q9/16H01Q9/42
    • The invention relates to an antenna array comprising an antenna (1) and a switching element (2), one terminal (2a) of which is electrically connected to a first coupling point (7) on the antenna (1) and the other terminal (2b) of which is electrically connected to a first impedance (3). The position of the first coupling point (7) on the antenna (1) as well as the type and magnitude of the first impedance (3) are selected such that the directivity of the antenna array (10) in a first switched state of the switching element (2) is rotated by an angle of more than zero degrees relative to the directivity of the antenna array (10) in a second switched state of the switching element (2), and/or the polarization characteristics (21) of the antenna array (10, 30, 40) in a first switched state of the switching element (2, 38a) are rotated by an angle of more than zero degrees relative to the polarization characteristics of the antenna array (10, 30, 40) in a second switched state of the switching element (2, 38a).
    • 本发明涉及的天线装置与天线(1)和开关元件(2),其一个端子(2A)上的天线的电连接到第一连接点(7)(1)和其他端子(2B)与 第一阻抗(3)电连接,其中所述第一Ankoppelpunkts(7)上的天线(1)和所述第一阻抗的类型和大小的位置(3)被选择为使得所述天线组件的方向性(10)首先在 切换所述开关元件(2)相对于所述天线组件的方向性的状态(10)通过超过零度的角度在所述开关元件(2)和/或所述天线装置的偏振特性(21)的第二开关状态下旋转(10,30,40) 在通过的角度的开关元件(2,38A)到所述天线组件相对于(10,30,40),在所述开关元件(2,38A)的第二开关状态的极化特性的第一切换状态 转过零度以上。
    • 6. 发明申请
    • METHOD FOR REDUCING THE OUT-OF-BAND EMISSION IN AM TRANSMITTERS FOR DIGITAL TRANSMISSION
    • 法降低带外辐射的IN AM电台数字传输
    • WO02071663A3
    • 2003-10-02
    • PCT/EP0200431
    • 2002-01-17
    • DEUTSCHE TELEKOM AGRUDOLPH DIETMARSCHAEFER ANDREAS
    • RUDOLPH DIETMARSCHAEFER ANDREAS
    • H04H20/49H04J11/00H04L27/34H04H1/00
    • H04L27/3405H04H20/46
    • The problem associated with digital transmission using existing AM transmitters is that the out-of-band emission that occurs must be reduced in order to comply with the ITU mask, as the shoulder distances that can be achieved by the AM transmitters are not sufficient for a satisfactory compensation. The signals that are required to control the AM transmitters, (amplitude signal and phase-modulated RF signal), are formed from the digital modulation signal by a Cartesian } polar transformation, whereby the bandwidth for the amplitude signal and RF signal reaches a value, which causes an unacceptable out-of-band emission. To prevent this, the invention provides methods for digital modulation, which avoid the zero point by a wide margin in their vector diagram representations, i.e. which form a "hole" around the 0/0 point. Modulation methods of this type are referred to as offset modulations and coded modulations. A variant of 16APSK is particularly suitable, as a higher net data throughput can be achieved with only 16 set points and negligible error protection coding is required. To transmit an OFDM signal, the "hole" in the vector diagram is obtained by offsetting the zero crossings for the I(t) and Q(t) signals and the latter is achieved by the insertion of a pulse into the subsequent component, e.g. I(t), if the other component Q(t) already falls short of a defined threshold value. A BPSK test sequence for measuring the radio channel can be used by means a modification, in which a modulation signal is formed by inserting a pulse between two pulses with a change of sign bit, said modulation signal having a "hole" around the 0/0 point. The size of the hole can be adjusted by the inserted pulse.
    • 与现有的AM发射机的数字传输导致了必须被最小化以符合ITU-掩模因为通过AM站间距肩可实现的是不足以足够的补偿发生在带外辐射的问题。 所需的用于控制AM发射机信号 - 振幅信号和相位调制的RF信号 - 通过变换笛卡尔从数字调制信号形成}极性,其中,所述振幅信号和RF信号的带宽达到值,这导致不可接受的带外辐射。 为了避免这种情况,在矢量图所示,当程序已经提出了用于数字调制零顺广泛,这是一个“洞”周围的0/0点的形式。 称为调制方法偏移调制和编码调制。 特别合适的是16APSK的一个变种,因为高的净数据吞吐量只有16集点实现,需要一点差错编码。 用于OFDM信号的传输中,“孔”在矢量图通过以下事实实现了零个杜赫通道为I(T) - 和Q相加(t)的信号,并且这被实现,即,随后的部件,例如。 B. I(t)的,当另一分量Q(t)的下降到低于定义的阈值的脉冲被加到。 使用用于测量无线电信道到BPSK测试序列可以通过修改来实现,如我们通过插入具有符号改变,其中由0/0点,一个“洞”,它的插入通过的尺寸已在矢量图两个脉冲之间的脉冲形成的调制信号 脉冲可以被设置。