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    Method and apparatus for a CDMA random access communication system
    1.
    发明授权
    Method and apparatus for a CDMA random access communication system 失效
    CDMA随机接入通信系统的方法和装置

    公开(公告)号：US06542493B1

    公开(公告)日：2003-04-01

    申请号：US09330380

    申请日：1999-06-11

    申请人： Karl E. Moerder

    发明人： Karl E. Moerder

    IPC分类号： H04B7216

    CPC分类号： H04W74/004 ,  H04J13/0048 ,  H04J13/18 ,  H04W74/0833

    摘要： In a system in which multiple remote units compete for limited communication resources, a remote unit accesses the system by randomly selecting a first sequence from a set of predetermined sequences. The remote unit transmits a data bit stream modulated with the first sequence beginning at one of a set of recurring admission boundaries. If the remote unit determines that the data bit stream has not been successfully received at a hub station, it randomly selects a second sequence from the set of predetermined sequences. The remote unit transmits the data bit stream modulated with the second sequence beginning at one of the set of recurring admission boundaries.

    摘要翻译： 在多个远程单元竞争有限通信资源的系统中，远程单元通过从一组预定序列中随机选择第一序列来访问系统。 远程单元发送以从一组重复进入边界中的一个开始的第一序列调制的数据比特流。 如果远程单元确定在中心站尚未成功接收到数据比特流，则从该组预定序列中随机选择第二个序列。 远程单元以从该组重复进入边界中的一个开始的以第二序列调制的数据比特流发送。

    Signal encryption and distribution system for controlling scrambling and selective remote descrambling of television signals
    3.
    发明授权
    Signal encryption and distribution system for controlling scrambling and selective remote descrambling of television signals 失效
    信号加密和分配系统，用于控制电视信号的扰频和选择性远程解扰

    公开(公告)号：US4613901A

    公开(公告)日：1986-09-23

    申请号：US498800

    申请日：1983-05-27

    申请人： Klein S. Gilhousen ,  Charles F. Newby, Jr. ,  Karl E. Moerder

    发明人： Klein S. Gilhousen ,  Charles F. Newby, Jr. ,  Karl E. Moerder

    IPC分类号： H04K1/00 ,  H04N7/167 ,  H04L9/00

    CPC分类号： H04N7/1675

    摘要： A system and method for scrambling and selectively descrambling television signals that are transmitted to subscribers' descramblers in a subscription television system. A working key signal is generated by processing an "initialization vector" signal in accordance with the DES algorithm upon the algorithm being keyed by either a common category key signal or some other key signal. A unique encryption keystream is generated by processing the initialization vector signal in accordance with the DES algorithm upon the algorithm being keyed by the working key signal. A television signal is scrambled in accordance with the unique encryption keystream to provide a scrambled television signal. A plurality of unique encrypted category key signals individually addressed to different selected subscribers' descramblers are generated by processing the initial common category key signal in accordance with the DES algorithm upon the algorithm being keyed by a plurality of different "unit key" signals unique to different selected descramblers. The scrambled television signal, the initialization vector signal, and the plurality of encrypted category key signals are broadcast to the descramblers. A corresponding tier of DES algorithms are employed at the descrambler to reproduce the encryption keystream; and the TV signal is descrambled in accordance therewith. Each descrambler has its unique unit key signal stored in a secure memory for use in reproducing the common category key signal when the descrambler is addressed by its unique encrypted category key signal.

    摘要翻译： 一种用于加扰和选择性地解扰电视信号的系统和方法，所述电视信号被发送到订阅电视系统中的订户的解扰器。 通过根据DES算法处理“初始化向量”信号，通过公共类别密钥信号或一些其它密钥信号进行加密，生成工作密钥信号。 通过根据DES算法处理初始化向量信号，通过工作密钥信号进行加密，产生唯一的加密密钥流。 根据唯一的加密密钥流对电视信号进行加扰以提供加扰的电视信号。 通过根据DES算法处理初始的公共类别密钥信号来生成多个独特的加密类别密钥信号，该算法由多个不同的独特的“单位密钥”信号键入 选择的解扰器。 扰频电视信号，初始化矢量信号和多个加密的类别键信号被广播到解扰器。 在解扰器上采用对应的DES算法来再现加密密钥流; 并且电视信号根据其解扰。 每个解扰器具有存储在安全存储器中的唯一单元密钥信号，用于当解密器通过其唯一的加密类别密钥信号寻址时用于再现公共类别密钥信号。

    Method and apparatus for multiple access in a communication system
    4.
    发明授权
    Method and apparatus for multiple access in a communication system 有权
    用于通信系统中多次访问的方法和装置

    公开(公告)号：US07203204B2

    公开(公告)日：2007-04-10

    申请号：US11042491

    申请日：2005-01-24

    申请人： Bruce L. Carneal ,  Karl E. Moerder ,  Donald W. Becker ,  Min Zhu

    发明人： Bruce L. Carneal ,  Karl E. Moerder ,  Donald W. Becker ,  Min Zhu

    IPC分类号： H04Q7/20 ,  H04B7/00

    CPC分类号： H04W74/02 ,  H04L1/1867

    摘要： A communication system comprising three communication resources: a contention-type access block, a non-contention access block and a second non-contention access block called a reserved block. Each time that a remote unit has a block of data to transfer to a hub station, it sends the block of data over the contention-type access block. It also sends a corresponding notification message over the reserved block. If the hub station receives the notification message but not the block of data, it sends a response message to the remote unit which designates a resource within the non-contention access block. The remote unit then sends the block of data to the hub station over the designated resource.

    摘要翻译： 一种包括三个通信资源的通信系统：竞争型接入块，非竞争接入块和被称为保留块的第二非竞争接入块。 每当远程单元有一块数据传输到中心站时，它将通过争用型访问块发送数据块。 它还通过保留块发送相应的通知消息。 如果中心站接收到通知消息而不是数据块，则向远程单元发送指定非竞争接入块内的资源的响应消息。 然后，远程单元通过指定的资源将数据块发送到中心站。

    Method and apparatus for calibration of a wireless transmitter
    8.
    发明授权
    Method and apparatus for calibration of a wireless transmitter 有权
    无线发射机校准方法和装置

    公开(公告)号：US06256483B1

    公开(公告)日：2001-07-03

    申请号：US09407641

    申请日：1999-09-28

    申请人： Karl E. Moerder ,  Donald W. Becker

    发明人： Karl E. Moerder ,  Donald W. Becker

    IPC分类号： H04B1700

    CPC分类号： H04W52/52 ,  H03G3/3042 ,  H03G3/3047 ,  H04B17/13 ,  H04W52/36

    摘要： When an installed wireless remote unit is operating in the field, routine operation is interrupted to enter a calibration mode. In calibration mode, the compression point of a circuit element is determined by applying a series of different drive levels to the circuit element. Based upon the determination of the compression point, a maximum transmission point is selected for the remote unit. Upon resumption of normal operation, the remote unit uses the maximum transmission point to limit the signal power level transmitted over the wireless link. As time passes or operating conditions change, the calibration process is re-executed.

    摘要翻译： 当安装的无线遥控单元在现场操作时，常规操作中断进入校准模式。 在校准模式中，电路元件的压缩点通过将一系列不同的驱动电平施加到电路元件来确定。 基于压缩点的确定，为远程单元选择最大传输点。 在恢复正常操作时，远程单元使用最大传输点来限制通过无线链路传输的信号功率电平。 随着时间的流逝或操作条件的改变，校准过程被重新执行。

    Digital audio companding and error conditioning
    9.
    发明授权
    Digital audio companding and error conditioning 失效
    数字音频压扩和错误调节

    公开(公告)号：US4809274A

    公开(公告)日：1989-02-28

    申请号：US091911

    申请日：1987-09-04

    申请人： Gordon K. Walker ,  Ron D. Katznelson ,  Paul Moroney ,  Karl E. Moerder

    发明人： Gordon K. Walker ,  Ron D. Katznelson ,  Paul Moroney ,  Karl E. Moerder

    IPC分类号： H04B14/04 ,  H03G7/00 ,  H03K7/02 ,  H03M20060101 ,  H03M7/30 ,  H04B1/64 ,  H04B15/00 ,  H04H20/88 ,  H04L1/08 ,  G06F11/10

    CPC分类号： H03G7/007 ,  H03M7/3053

    摘要： A system for companding digital audio signal samples processes the digital audio signal samples to correct errors induced by the compression and expansion processes. These errors are calculated prior to compressing the samples. Such errors are calculated in accordance with a predetermined compression process and a predetermined expansion process; and the digital audio signal samples are corrected in accordance with such calculations prior to compression. The compression process includes providing a 3-bit gain word for a block of 70 samples. The gain word is computed in accordance with the position of the most significant "1" bit in the sample(s) having the peak magnitude. Each individual sample is processed in accordance with the block gain word to compress the sample by reducing the number of magnitude bits. The error calculation process includes calculating an error signal by subtracting a calculated reproduced digital audio signal sample from the digital audio signal sample to be compressed, filtering the error signal by noise-spectral filtering and adding the filtered error signal to the next-providing digital audio signal sample to provide a corrected digital audio signal sample for compression. The error calculation process also includes calculating an error value based upon the effect of using a single gain word for compressing a block of samples. The error value is subtracted from the corrected digital audio signal sample prior to compression. The gain word is forward error corrected by (5,1) encoding to enable detection and correction of both single-bit and double-bit errors in transfer by majority voting. The sign bit and the most significant magnitude bits of the compressed samples are forward error corrected to enable detection and correction of single-bit errors in transfer and to enable detection and concealment of double-bit errors in transfer.

    摘要翻译： 用于压缩数字音频信号样本的系统处理数字音频信号样本以校正由压缩和扩展过程引起的误差。 在压缩样品之前计算这些误差。 这样的误差根据预定的压缩处理和预定的扩展处理来计算; 并且在压缩之前根据这样的计算校正数字音频信号样本。 压缩过程包括为70个样本的块提供3位增益字。 根据具有峰值幅度的采样中最高有效“1”位的位置来计算增益字。 根据块增益字来处理每个单独的样本，以通过减少幅度比特数来压缩样本。 误差计算处理包括通过从要压缩的数字音频信号样本中减去计算出的再现数字音频信号样本来计算误差信号，通过噪声频谱滤波对误差信号进行滤波，并将滤波后的误差信号加到下一个提供的数字音频 信号采样以提供用于压缩的校正数字音频信号样本。 误差计算处理还包括基于使用单个增益字来压缩采样块的效果来计算误差值。 在压缩之前从校正的数字音频信号样本中减去误差值。 增益字是通过（5,1）编码进行前向误差校正，以便通过多数表决来传输单位和双位错误的检测和校正。 压缩样本的符号位和最高有效幅度位是前向纠错的，以便能够检测和校正传输中的单位错误，并能够检测和隐藏传输中的双位错误。

    Descrambler subscriber key production system utilizing key seeds stored in descrambler
    10.
    发明授权
    Descrambler subscriber key production system utilizing key seeds stored in descrambler 失效
    解密器用户密钥生产系统利用存储在解扰器中的密钥种子

    公开(公告)号：US4634808A

    公开(公告)日：1987-01-06

    申请号：US589741

    申请日：1984-03-15

    申请人： Karl E. Moerder

    发明人： Karl E. Moerder

    IPC分类号： H04K1/00 ,  H04L9/06 ,  H04L9/08 ,  H04L9/14 ,  H04N7/167 ,  H04L9/00

    CPC分类号： H04N7/1675

    摘要： A system for reproducing in a descrambler of a subscriber communication network a subscriber key signal that is unique to the descrambler and was used in encrypting a key signal that must be decrypted for use in descrambling a signal received by the descrambler. The scrambled signal is received by the descrambler together with the encrypted key signal and a key generation number containing an address for accessing a predetermined area in a memory contained in the descrambler. The system includes a circuit for providing a subscriber key generation signal that is unique to the descrambler; a subscriber key generator for reproducing the unique subscriber key signal by processing the subscriber key generation signal in accordance with a predetermined encryption algorithm upon the algorithm being keyed by a prescribed subscriber key seed signal that is unique to the descrambler; a secure memory storing a plurality of different subscriber key seed signals, and for providing the prescribed seed signal to key the algorithm when the area of the memory containing the prescribed seed signal is accessed by the address contained in the received key generation number; and a circuit for accessing the first memory with the address contained in the received key generation number. The subscriber key generation signal is formed by combining the received key generation number with a unique subscriber address signal that is stored in a second memory of the descrambler.

    摘要翻译： 一种用于在用户通信网络的解扰器中再现用于解扰器唯一的用户密钥信号并且用于加密必须被解密以用于解扰解扰器接收的信号的密钥信号的系统。 加扰信号由加密密钥信号和包含用于访问包含在解扰器中的存储器中的预定区域的地址的密钥生成号码与解密器一起接收。 该系统包括用于提供除扰器唯一的用户密钥生成信号的电路; 用户密钥发生器，用于通过根据预定的加密算法处理用户密钥生成信号来再现唯一的用户密钥信号，该算法被解密器唯一的规定的用户密钥种子信号加密; 存储多个不同用户密钥种子信号的安全存储器，并且当包含所述规定的种子信号的存储器的区域被所接收的密钥生成号码中包含的地址访问时，提供规定的种子信号来键入该算法; 以及用于接收包含在所接收的密钥生成号码中的地址的第一存储器的电路。 订户密钥生成信号通过将接收到的密钥生成号码与存储在解扰器的第二存储器中的唯一用户地址信号进行组合来形成。