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    Wireless telecommunication base station for integrated wireless services with ATM processing
    2.
    发明授权
    Wireless telecommunication base station for integrated wireless services with ATM processing 失效
    无线电信基站，用于ATM处理的综合无线业务

    公开(公告)号：US5600633A

    公开(公告)日：1997-02-04

    申请号：US393784

    申请日：1995-02-24

    申请人： Gopal K. Jaisingh ,  Jesse E. Russell

    发明人： Gopal K. Jaisingh ,  Jesse E. Russell

    IPC分类号： H04Q3/00 ,  H04W88/08 ,  H04B1/66

    CPC分类号： H04W88/08 ,  H04N2007/145

    摘要： A wide variety of services both narrow band and broad band are provided to wireless stations both fixed and mobile by a flexible intelligent ATM base station. Such a base station provides two-way integrated voice, wireless date, wireless multimedia, and compressed video services to a wireless subscriber using different narrow band and wide band Common Air Interfaces (CAI). Uplink service includes narrow band signaling and bearer information signaling. By having a single base station perform these services, the number of station sites, required for a given level of service, may be significantly reduced and the spectrum utilization may be significantly increased.

    摘要翻译： 通过灵活的智能ATM基站向固定和移动的无线电台提供宽带和宽带的各种服务。 这样的基站使用不同的窄带和宽带公共空中接口（CAI）向无线用户提供双向集成语音，无线日期，无线多媒体和压缩视频服务。 上行服务包括窄带信令和承载信息信令。 通过使单个基站执行这些服务，可以显着减少给定级别的服务所需的站点数量，并且可以显着增加频谱利用率。

    FFT-based multitone DPSK modem
    4.
    发明授权
    FFT-based multitone DPSK modem 失效
    基于FFT的多音DPSK调制解调器

    公开(公告)号：US06148024A

    公开(公告)日：2000-11-14

    申请号：US810577

    申请日：1997-03-04

    申请人： Jin-Meng Ho ,  Gopal K. Jaisingh

    发明人： Jin-Meng Ho ,  Gopal K. Jaisingh

    IPC分类号： H04L27/34 ,  H04J11/00 ,  H04L27/18 ,  H04L27/26 ,  H04B1/38

    CPC分类号： H04L27/2649 ,  H04L27/2627

    摘要： A system and a method for transmitting coded information bits using multitone techniques on a frame-by-frame basis. For transmission, coded information bits are mapped into differential phase signals and absolute phase signals are generated based on differential phase signals. N complex symbols are then generated and inverse discrete Fourier transformed into N complex, time-domain samples, which are augmented with a cyclic prefix and suffix. The augmented N complex, time-domain samples are then separated into two real samples and converted into first and second baseband signals. The first and second baseband signals are impressed into quadrature carrier components to form in-phase and quadrature signal components which are combined into an RF signal prior to transmission. For reception, a received RF signal is non-coherently quadrature demodulated into first and second quadrature baseband signals. First and second quadrature sample sequences are generated by sampling the quadrature baseband signals in parallel. The added cyclic prefix and suffix are discarded, and N complex numbers are generated from the first and second quadrature (real) sample sequences. N channel-weighted tones are generated by performing a discrete Fourier transform on the N complex numbers. N phase difference signals are generated which are demapped into coded information bits according to a predetermined phase constellation.

    摘要翻译： 一种在逐帧的基础上使用多音频技术发送编码信息比特的系统和方法。 为了传输，将编码信息位映射到差分相位信号中，并且基于差分相位信号产生绝对相位信号。 然后生成N个复符号，并将离散傅立叶逆变换为N个复杂的时域采样，其被增加了循环前缀和后缀。 增强的N个复数，时域采样然后被分成两个实样，并转换成第一和第二基带信号。 第一和第二基带信号被加载到正交载波分量中以形成在传输之前被组合成RF信号的同相和正交信号分量。 对于接收，接收的RF信号被非相干正交解调为第一和第二正交基带信号。 通过并行对正交基带信号进行采样来生成第一和第二正交样本序列。 添加的循环前缀和后缀被丢弃，并且从第一和第二正交（实数）样本序列生成N个复数。 通过对N个复数进行离散傅立叶变换来生成N个信道加权音调。 产生N个相位差信号，其根据预定的相位星座被映射到编码信息比特中。