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    • 7. 发明授权
    • Universal wireless radiotelephone system
    • 通用无线电话系统
    • US5574775A
    • 1996-11-12
    • US329038
    • 1994-10-25
    • Robert R. Miller, IIB. Waring Partridge, IIIJesse E. RussellRobert E. Schroeder
    • Robert R. Miller, IIB. Waring Partridge, IIIJesse E. RussellRobert E. Schroeder
    • H04B1/40H04W36/14H04W88/06H04Q7/22
    • H04W88/06H04B1/005H04B1/0057H04B1/006H04B1/40H04B1/406H04W36/14H04W76/02
    • A universal wireless radiotelephone communication apparatus is operative in both a first radiotelephone communication system including a first base station having a wide area of coverage, transmitting radiotelephone signals at a first band of frequencies and in a second radiotelephone communication system including a second base station having a localized area of coverage, transmitting radiotelephone signals at a second band of frequencies higher than said first band of frequencies. The second band of frequencies is optimally selected with an offset of less than twice a frequency contained within said first band. The wireless radiotelephone communication apparatus has a common baseband circuitry for operating with both the first base station covering the wide area and with the second base station covering the local area, the common baseband circuitry processing received radiotelephone signals from both base stations and processes signals generated by a user of the handset for transmission to either of these base stations.
    • 通用无线电话电话通信装置在包括具有广泛覆盖区域的第一基站的第一无线电话通信系统中工作,以第一频带频率发射无线电话信号和在包括第二基站的第二无线电话通信系统中, 局部覆盖区域,在高于所述第一频带的频率的第二频带上发射无线电话信号。 频率的第二频带被最佳地选择,其偏移小于包含在所述第一频带内的频率的两倍。 无线无线电话通信装置具有共同的基带电路,用于与覆盖广域的第一基站和覆盖局域的第二基站同时操作,公共基带电路处理来自两个基站的接收的无线电话信号,并处理由两个基站产生的信号 用于传输到这些基站中的任何一个的手机的用户。