公开(公告)号：US5151919A

公开(公告)日：1992-09-29

申请号：US628359

申请日：1990-12-17

申请人： Paul W. Dent

发明人： Paul W. Dent

IPC分类号： H04Q7/38 ,  H04B1/7107 ,  H04B7/204 ,  H04J11/00

CPC分类号： H04B1/71072 ,  H04B2001/71077 ,  H04B2201/70703

摘要： Substractive CDMA demodulation optimally decodes a coded information signal embedded in may other overlapping signals making up a received, composite signal. A radio receiver correlates a unique code corresponding to the desired signal to be decoded with the composite signal. Moreover, after each information signal is successfully decoded, it is recoded and removed from the composite signal. As a result, subsequent correlations are performed with greater accuracy. Substractive CDMA demodulation is enhanced by decoding the composite signal in the order of strongest to weakest signal strength. Interference caused by the presence of the strongest information signal and the composite signal during the decoding of weaker signals is removed. The individual information signals are assigned a unique block error correction code with is correlated with the composite signal using Fast Walsh transforms. Correlated signals are recoded using inverted Fast Walsh transforms and removed from the composite signal.

公开(公告)号：US5060266A

公开(公告)日：1991-10-22

申请号：US556102

申请日：1990-07-20

申请人： Paul Dent

发明人： Paul Dent

IPC分类号： H04L9/12 ,  H04W12/00

CPC分类号： H04L9/12 ,  H04L9/0656 ,  H04L2209/80 ,  H04W12/02

摘要： A system for the synchronization of encryption devices in a digital cellular communications system. Each of the encryption devices includes a multi-bit counter and generates a pseudo-random keystream which is combined with the data to be encrypted. The keystream is a function of the multi-bit counter value which is periodically incremented in response to a series of clock pulses. To allow proper decryption of the encrypted data, the system of the present invention provides continuous or very frequent updates of the transmitter counter value which may be used to reset the receiver counter and to resynchronize the system without the necessity of reinitialization and repetition of the intervening clock pulses.

摘要翻译： 一种用于在数字蜂窝通信系统中同步加密设备的系统。 每个加密装置包括多比特计数器，并产生与要加密的数据组合的伪随机密钥流。 密钥流是响应于一系列时钟脉冲而周期性增加的多位计数器值的函数。 为了允许加密数据的适当解密，本发明的系统提供可以用于重置接收器计数器并重新同步系统的发射机计数器值的连续或非常频繁的更新，而不需要重新初始化和重复中间 时钟脉冲。

公开(公告)号：US5357454A

公开(公告)日：1994-10-18

申请号：US735805

申请日：1991-07-25

申请人： Paul W. Dent

发明人： Paul W. Dent

IPC分类号： G06F17/14 ,  G06F15/40

CPC分类号： G06F17/145

摘要： A processor for generating a Walsh transform by substantially simultaneously calculating M combinations of M input values, wherein M=2.sup.N and the input values are two's-complement binary values, has N stages electrically connected in sequence, wherein each stage has a criss-cross network of M conductors electrically connected in a predetermined pattern to a set of M/2 butterflies, the butterflies having devices for calculating sums and differences of respective values presented by their respective criss-cross networks and presenting the sums and differences to respective conductors of the next stage's criss-cross network. The input values are presented to the criss-cross network of the first stage serially and least-significant-bit first, and substantially synchronously therewith, the Walsh transform of the input values is serially produced by the butterflies of the N-th stage.

摘要翻译： 一种用于通过基本上同时计算M个输入值的M个组合来生成沃尔什变换的处理器，其中M = 2N，并且输入值是二进制补码二进制值，其中N个级依次电连接，其中每个级具有交叉网络 的M个导体以预定图案电连接到一组M / 2蝴蝶，蝴蝶具有用于计算由它们各自的十字交叉网络呈现的相应值的和和差异的装置，并将和差和差值呈现给下一个 舞台的十字交叉网络。 输入值以第一级串联和最低有效位为前提，并与其大致同步地呈现给十字交叉网络，输入值的沃尔什变换由第N级的蝴蝶串联产生。

公开(公告)号：US5345598A

公开(公告)日：1994-09-06

申请号：US866554

申请日：1992-04-10

申请人： Paul W. Dent

发明人： Paul W. Dent

IPC分类号： H04B7/26 ,  H04B7/005

CPC分类号： H04W52/346 ,  H04W52/44 ,  Y02B60/50

摘要： Measurements of mobile signal strength received at the base station are used to determine the portion of power that should be transmitted by the base station to a particular mobile. Each of a plurality of mobiles measure the relative strength of the base station signal specifically intended for that mobile. The relative strength is compared to either the total base station signal power or to a cumulative ranking of the power of signals intended for other mobiles. That comparison is used to determine whether the mobile should increase or decrease its power.

摘要翻译： 使用在基站处接收的移动信号强度的测量来确定应由基站向特定移动台传输的功率部分。 多个移动台中的每一个测量专门针对该移动台的基站信号的相对强度。 将相对强度与总基站信号功率或旨在用于其他移动台的信号的功率的累积等级进行比较。 该比较用于确定移动应用是增加还是减少其功率。

公开(公告)号：US5276764A

公开(公告)日：1994-01-04

申请号：US713776

申请日：1991-06-12

申请人： Paul W. Dent

发明人： Paul W. Dent

IPC分类号： H03G7/08 ,  H03M3/02 ,  H04B1/64 ,  G10L3/02

CPC分类号： H04B1/64 ,  H03M3/022

摘要： A device and a method for processing an analog input signal (S) which varies widely in amplitude, such as speech, for the purpose of reducing the ratio of maximum to minimum amplitude variations of an output signal (P), after the processing, to the square root of the ratio existing before processing in order better to transmit said signal through a channel of restricted dynamic range in the presence of additive noise. The device comprises a converter (2) arranged to change the input signal (S) into a stream of integer numbers (N1,N2,N3 . . .). The numbers in the stream represent in some proportional way the instantaneous value of the input signal (S) divided by a reference voltage (R). This reference voltage (R) is generated by a smoothed amplitude measuring device (4) in proportion to the amplitude of the output signal (P) that is produced, when the number stream is reconverted to an analog signal waveform by means of a converter (6) working with a constant reference voltage. A device and a method for processing a signal of compressed amplitude variation, such as might be produced by the method and device described above, in order to produce a signal of amplitude variation restored to the normal range, being the square of the compressed range is also disclosed.

摘要翻译： 为了将处理之后的输出信号（P）的最大值与最小振幅变化的比率减小到处理之后的处理模拟输入信号（S）的装置和方法，该模拟输入信号（S）的幅度变化很大，例如语音， 在处理之前存在的比率的平方根，以便在存在加性噪声的情况下更好地通过受限动态范围的信道传输所述信号。 该装置包括转换器（2），其被设置为将输入信号（S）改变成整数（N1，N2，N3 ...）流。 流中的数字以一定比例的方式表示输入信号（S）的瞬时值除以参考电压（R）。 当通过转换器将数字流重新转换为模拟信号波形时，该参考电压（R）由平滑的幅度测量装置（4）产生，与产生的输出信号（P）的幅度成比例 6）使用恒定的参考电压。 为了产生恢复到作为压缩范围的平方的正常范围的幅度变化的信号，可以通过上述方法和装置产生压缩振幅变化信号的装置和方法， 也披露。

公开(公告)号：US5187675A

公开(公告)日：1993-02-16

申请号：US761380

申请日：1991-09-18

申请人： Paul W. Dent ,  Jaap C. Haartsen

发明人： Paul W. Dent ,  Jaap C. Haartsen

IPC分类号： G06F7/02 ,  G06F7/22 ,  G06F7/38

CPC分类号： G06F9/30021 ,  G06F7/026 ,  G06F7/22

摘要： An electronic comparator for selecting and outputting the larger of first and second electrical, binary-coded input values presented bit-serially, most-significant-bit first, has first and second input terminals; a logical exclusive-OR gate; a first resettable flip-flop; a second flip-flop; and a device for selecting one of the input values as an output of the comparator. In a second embodiment, the electronic comparator has first and second input terminals; a logical exclusive-OR gate; a first flip-flop synchronized with a train of bitclock pulses; a second resettable flip-flop; a third flip-flop; and a device for selecting one of the input values as an output of the comparator. Devices for generating traceback signals indicating which input values were selected and a signal indicating that the maximum value has been identified are also disclosed.

摘要翻译： 电子比较器用于选择和输出第一和第二电子二进制编码的输入值中较大的第二和第二输入端，其中，第一和第二输入端有位串行，最高有效位。 逻辑异或门; 第一个可复位触发器; 第二个触发器 以及用于选择输入值之一作为比较器的输出的装置。 在第二实施例中，电子比较器具有第一和第二输入端; 逻辑异或门; 与一串比特时钟脉冲同步的第一个触发器; 第二可复位触发器; 第三个触发器 以及用于选择输入值之一作为比较器的输出的装置。 还公开了用于产生指示哪些输入值被选择的回溯信号的装置和指示已经识别出最大值的信号。

公开(公告)号：US5146615A

公开(公告)日：1992-09-08

申请号：US390254

申请日：1989-08-07

申请人： Roy F. Hodsdon ,  Douglas M. Dickson

发明人： Roy F. Hodsdon ,  Douglas M. Dickson

IPC分类号： H04B1/38 ,  H04M1/02 ,  H04M1/725

CPC分类号： H04M1/72575 ,  H04B1/3833 ,  H04M1/0254 ,  H01H2221/002 ,  H01H2221/056 ,  H01H2221/066 ,  H01H2223/034 ,  H04B2001/3894 ,  H04M1/0283

摘要： A radio transceiver comprising a housing including a front cover, a plurality of interchangeable control panels adapted for selective alternative attachment to the front cover, and a plurality of interchangeable keypads adapted for selective alternative attachment to the front cover in underlying relationship with a respective one of the control panels, wherein each control panel is configured for use with a similarly configured one of the keypads. Each of the control panels comprises a relatively thin planar member having front and rear faces and defined by upper, lower and a pair of side edges, and includes a projection or locking bar extending along and away from the upper edge, and fastening means located adjacent the lower edge. A standardized electronic circuit board is provided within the unit, some or all of the switches included on the circuit being accessible, depending on the particular keypad and control panel employed.

摘要翻译： 一种无线电收发器，包括壳体，所述壳体包括前盖，适于选择性地替代附接到所述前盖的多个可互换控制面板，以及多个可互换键盘，其适于以与所述前盖相对应的下一个 控制面板，其中每个控制面板被配置为与类似配置的键盘之一一起使用。 每个控制面板包括相对薄的平面构件，其具有前表面和后表面并且由上，下和一对侧边缘限定，并且包括沿着或远离上边缘延伸的突出物或锁定杆，以及紧邻装置 下边缘。 根据所使用的特定键盘和控制面板，在该单元内提供标准化的电子电路板，包括在电路中的部分或全部开关是可访问的。

公开(公告)号：US5218619A

公开(公告)日：1993-06-08

申请号：US739446

申请日：1991-08-02

申请人： Paul W. Dent

发明人： Paul W. Dent

IPC分类号： H04B1/707 ,  H04B1/709 ,  H04B1/7107 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04Q7/38

CPC分类号： H04B1/71072 ,  H04B1/709 ,  H04B7/2628 ,  H04J13/00 ,  H04J13/0048 ,  H04B2001/71077 ,  H04B2201/70703

摘要： Subtractive CDMA demodulation optimally decodes a coded information signal embedded in many other overlapping signals making up a received, composite signal. A radio receiver correlates a unique code corresponding to the desired signal to be decoded with the composite signal. Moreover, after each information signal is successfully decoded, it is recoded and removed from the composite signal. Subtractive CDMA demodulation is enhanced by decoding the composite signal in the order of strongest to weakest signal strength. The individual information signals are spread using block error correction codes which are correlated with the composite signal using Fast Walsh transforms. Correlated signals identified as the largest transform component are removed from the composite signal and the remaining composite signal is reformulated using an inverted Fast Walsh transform. Any residual error or interference caused during the extraction of a transform component is removed by recorrelating the composite signal using the index of that transform component.

摘要翻译： 减法CDMA解调对嵌入在构成接收的复合信号的许多其他重叠信号中的编码信息信号进行最佳解码。 无线电接收机将与要解码的期望信号相对应的唯一码与复合信号相关联。 此外，在每个信息信号被成功解码之后，它被重新编码并从复合信号中去除。 通过以最强到最弱的信号强度的顺序解码复合信号来增强减法CDMA解调。 使用与使用快速沃尔什变换的复合信号相关的块误差校正码来扩展个体信息信号。 识别为最大变换分量的相关信号从复合信号中去除，并且使用反向快速沃尔什变换重新设计剩余的复合信号。 通过使用该转换分量的索引重新相关复合信号来消除在提取变换分量期间引起的任何残余误差或干扰。

公开(公告)号：US5237586A

公开(公告)日：1993-08-17

申请号：US857433

申请日：1992-03-25

申请人： Gregory E. Bottomley

发明人： Gregory E. Bottomley

IPC分类号： H04B1/00 ,  H04B1/10 ,  H04B1/709 ,  H04B1/7115 ,  H04B1/7117 ,  H04B1/712

CPC分类号： H04B1/7115 ,  H04B1/709 ,  H04B1/7117 ,  H04B1/712

摘要： A modified RAKE receiver, referred to as a WRAKE receiver, is used in CDMA communications. It is particularly adaptable to a subtractive CDMA system. The receiver includes a radio receiver for receiving and demodulating a composite signal of overlapping transmitted signals (spread signals), a sampler to sample the received signals, a selector for selecting different groups of samples, a correlator for correlating the samples with known despreading codes and a comparator to determine the symbol transmitted. The receiver also includes a combiner which combines either different groups of samples together or combines different correlation values together. The sample groups selected are channel independent and combine data received from different time shifts. Likewise, the sample groups for each channel and the correlation values are time-of-arrival independent.

公开(公告)号：USD337984S

公开(公告)日：1993-08-03

申请号：US694019

申请日：1991-05-01

申请人： Richard Lindahl

设计人： Richard Lindahl