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    • 43. 发明授权
    • Digital video broadcast-terrestrial (DVB-T) receiver interoperable with a GSM transmitter in a non-interfering manner using classmark change procedure
    • 数字视频广播地面(DVB-T)接收机可以使用类标改变程序以非干扰方式与GSM发射机互操作
    • US06892076B2
    • 2005-05-10
    • US10164176
    • 2002-06-05
    • Juha MaalismaaMarko Leinonen
    • Juha MaalismaaMarko Leinonen
    • H04B1/38H04B15/00H04Q7/20H04B1/00H04M1/00
    • H04L1/0001H04B1/3805H04B15/00
    • A method and a device used for displaying wideband information to a user has a return channel made through a cellular mobile terminal (CMT) providing interactivity. The device (10) has a first antenna (12) and a second antenna (20), a receiver (14, 16) that is coupled to the first antenna and a transmitter (24) that is coupled to the second antenna. The method includes, prior to receiving information in a symbol-wise manner with the receiver in a first band of radio frequencies, generating a notification of reception with the receiver by asserting a DVB_RX_ON signal (16A) and, in response to the notification, requesting a change of transmitter transmission frequencies from a second band of radio frequencies to a third band of radio frequencies that is predetermined to avoid interference with the reception of the information in the first band of radio frequencies. The transmitter is preferably a cellular mobile terminal transmitter, and the request for a change can be made by initiating a Classmark Change procedure with a cellular mobile terminal wireless network. In one embodiment the first band of radio frequencies comprises a DVB-T 470-862 MHz reception band, the second band of radio frequencies comprises a GSM 880-915 MHz transmission band, and the third band of radio frequencies comprises a higher GSM band, such as the GSM 1800 MHz band or the European 3G band. In other embodiments, such as one practiced in the United States, the CMT call may be rerouted from the CMT 800 MHz band to the CMT 1900 MHz band.
    • 用于向用户显示宽带信息的方法和设备具有通过提供交互性的蜂窝移动终端(CMT)制成的返回信道。 设备(10)具有第一天线(12)和第二天线(20),耦合到第一天线的接收机(14,16)和耦合到第二天线的发射机(24)。 该方法包括:在以符号方式接收第一无线电频带中的接收机的信息之前,通过断言DVB_RX_ON信号(16A)产生与接收机的接收通知,并且响应该通知, 请求将发射机传输频率从第二无线电频带改变到预定的第三频段,以避免干扰第一无线电频段中的信息。 发射器优选地是蜂窝移动终端发射机,并且可以通过利用蜂窝移动终端无线网络发起类别改变过程来进行改变请求。 在一个实施例中,无线电频率的第一频带包括DVB-T 470-862MHz接收频带,第二频段包括GSM 880-915MHz传输频带,而第三频段包括更高的GSM频段, 如GSM 1800 MHz频段或欧洲3G频段。 在其他实施例中,例如在美国实施的实施例,CMT呼叫可以从CMT800MHz频带重新路由到CMT 1900MHz频带。