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1.发明授权
公开(公告)号：US5031193A
公开(公告)日：1991-07-09
申请号：US435650
申请日：1989-11-13
申请人： Frederick G. Atkinson , Gerald P. Labedz , Duane C. Rabe , Joseph J. Schuler , Alton P. Werronen
发明人： Frederick G. Atkinson , Gerald P. Labedz , Duane C. Rabe , Joseph J. Schuler , Alton P. Werronen
CPC分类号： H04B7/0845 , H04L1/06 , H04B7/084 , H04B7/0857 , H04B7/0888
摘要： A method and appartus for diversity reception in a communication system wherein at least a dual branch receiver is provided with a stored replica of expected reference information that is correlated with the received time-dispersed signals to obtain an estimate of the transmission channel's impulse response as seen by each branch, and determine, among other things, phase error between the branch local oscillators and the time-dispersed signals. Matched filters are constructed which then coherently align the time-dispersed signals from each branch with that branch's local oscillator, also constituting the first part of the equalization. The diversity processing stage may perform bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, following each by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal. In digital modulated carrier systems, providing expected reference information eliminates the neeed for carrier recovery feedback for each branch while performing part of the equalization process.
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公开(公告)号：US5515374A
公开(公告)日：1996-05-07
申请号：US414457
申请日：1995-03-31
CPC分类号： H04J3/1682
摘要： A method (300) and apparatus (200) provide for determining when a digital packet data signal and a voice signal are being concomitantly transmitted on a voice channel of a communication system. A sample of the transmitted signal (110) is compared (310) to a pre-transmitted sample of the digital packet data signal (108). In response to the comparison, a digital packet data transceiver hops (314-320) from the first voice channel to a different voice channel for transmitting the digital packet data signal when voice signals are present.
摘要翻译： 方法（300）和装置（200）提供用于确定数字分组数据信号和语音信号何时在通信系统的语音信道上同时发送。 将发送信号（110）的采样与数字分组数据信号（108）的预先发送的采样进行比较（310）。 响应于比较，当语音信号存在时，数字分组数据收发器从第一语音信道跳到（314-320）到不同的话音信道，用于发送数字分组数据信号。
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公开(公告)号：US5638375A
公开(公告)日：1997-06-10
申请号：US277724
申请日：1988-11-30
CPC分类号： H03G3/3078 , H04J3/10
摘要： In a communications system having transmissions containing certain information-of-interest at predetermined intervals in the transmission, there is provided a method for isolating and processing that information-of-interest. The method comprises sensing the start of a transmission and isolating for processing as the information-of-interest, the information received about instant(s) predeterminally removed in time from the sensed start of transmission. Thus, the information-of-interest is isolated principally on the basis of elapsed time.The method for isolating and processing that information-of-interest is further characterized by sensing the start of a transmission from the received signal power of the transmission exceeding a predetermined threshold; AGCing the transmission and attenuating the AGC'd transmission from a maximum level to a desired level before the information-of-interest is expected to arrive; isolating for processing as the information-of-interest, the information received about instant(s) predeterminally removed in time from the sensed start of transmission, by timing the expected interval between the instant that the start of the transmission is sensed and the predetermined instant that the information-in-interest should arrive (whereby the information-of-interest is isolated principally on the basis of elapsed time); tagging the information isolated about that instant for processing; and beginning processing with information just preceeding the isolated information (whereby the reliability of the information detection is enhanced by one-to-several bits).
摘要翻译： 在具有在传输中以预定间隔包含某些感兴趣的信息的传输的通信系统中，提供了一种用于隔离和处理该感兴趣的信息的方法。 该方法包括：感测开始传输并隔离用于处理的信息作为感兴趣的信息，从感测的传输开始在时间上预先从移动中接收关于即时的信息。 因此，感兴趣的信息主要是基于经过的时间来隔离。 用于隔离和处理该感兴趣的信息的方法进一步的特征在于：从传输的接收信号功率超过预定阈值来检测传输的开始; 在感兴趣的信息预期到达之前，AGC发送和衰减AGC的传输从最大级别到期望的级别; 隔离以作为感兴趣的信息进行处理，通过定时检测到感测到发送开始的时刻与预定时刻之间的期望间隔，接收关于从感测到的发送开始在时间上预先去除的即时的信息 感兴趣的信息应该到达（主要是基于经过的时间隔离利益信息）; 标记关于该时刻分离的信息进行处理; 并且开始处理刚刚在隔离信息之前的信息（由此信息检测的可靠性被增加一到几位）。
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4.发明授权Method and apparatus for signal strength measurement and antenna selection in cellular radiotelephone systems 失效蜂窝无线电话系统中信号强度测量和天线选择的方法和装置
公开(公告)号：US4704734A
公开(公告)日：1987-11-03
申请号：US829872
申请日：1986-02-18
CPC分类号： H04B7/2621 , H04B7/0808 , H04B7/0825 , H04W16/24
摘要： A method and apparatus for determining which sector antenna of a sectorized cellular radiotelephone system is receiving the strongest radio signal is disclosed. The signal strength of sector antennas is sequentially sampled, converted to digital representations, and stored according to which antenna received the signal. The digital representations are recalled from storage and the strongest signal along with an identification of the receiving antenna are determined. This determination may be used in the handoff process or in detecting when a remote unit requires a handoff.
摘要翻译： 公开了一种用于确定扇区化蜂窝无线电话系统的哪个扇区天线正在接收最强无线电信号的方法和装置。 扇区天线的信号强度被顺序采样，转换为数字表示，并根据天线接收到信号进行存储。 数字表示是从存储器调用的，确定最强信号以及接收天线的标识。 该确定可以在切换过程中使用或者在远程单元需要切换时检测。
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公开(公告)号：US4694484A
公开(公告)日：1987-09-15
申请号：US830145
申请日：1986-02-18
CPC分类号： H04W88/08
摘要： A fixed site station for cellular systems is disclosed. A plurality of radio transceivers are removably disposed in apertures of the common equipment housing and are provided unique parameters of operation by the system controller dependent upon the aperture in which the transceiver is located and the antenna configuration of the cell being served.
摘要翻译： 公开了一种用于蜂窝系统的固定站点。 多个无线电收发机可拆卸地设置在公共设备外壳的孔中，并且由系统控制器提供独特的操作参数，取决于收发器所在的孔径和正在服务的小区的天线配置。
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