公开(公告)号：US5627878A

公开(公告)日：1997-05-06

申请号：US444828

申请日：1995-05-18

申请人： Roger Strauch ,  Daniel H. Miller

发明人： Roger Strauch ,  Daniel H. Miller

IPC分类号： H04W4/12 ,  H04Q7/20

CPC分类号： H04W4/12

摘要： In the present telecommunication system, a wired network receives a plurality of electrical signals, such as voice signals and transmits them. A first communication device is connected to the wired network. The first communication device includes means for receiving the plurality of electrical signals, a first storage means for storing the plurality of electrical signals, a first playback means for retrieving a portion of the stored plurality of electrical signals, and a first control means for controlling the first playback means to transmit the retrieved portion of electrical signals. The portion of the stored plurality of electrical signals which are retrieved are then placed onto a wireless network which is in communication with a plurality of portable units. Each of the portable units has capability of communicating with the wireless network for receiving the electrical signals therefrom. Finally, the first communication unit causes the stored plurality of electrical signals stored on the first communication unit to be transmitted to a different one of the plurality of portable units.

摘要翻译： 在本电信系统中，有线网络接收诸如语音信号的多个电信号并发送它们。 第一通信设备连接到有线网络。 第一通信装置包括用于接收多个电信号的装置，用于存储多个电信号的第一存储装置，用于检索存储的多个电信号的一部分的第一重放装置，以及用于控制所述多个电信号的第一控制装置 第一重放装置，用于发送检索到的电信号部分。 所检索的存储的多个电信号的部分然后被放置在与多个便携式单元通信的无线网络上。 每个便携式装置具有与无线网络通信的能力，用于从其接收电信号。 最后，第一通信单元将存储在第一通信单元上的存储的多个电信号发送到多个便携式单元中的不同的一个。

公开(公告)号：US5745551A

公开(公告)日：1998-04-28

申请号：US144127

申请日：1993-10-27

申请人： Roger Strauch ,  Daniel H. Miller

发明人： Roger Strauch ,  Daniel H. Miller

IPC分类号： H04W4/12 ,  H04M11/00 ,  H04M1/64

CPC分类号： H04W4/12

摘要： In the present telecommunication system, a wired network receives a plurality of voice signals and transmits them. A first communication device is connected to the wired network. The first communication device includes means for receiving the plurality of voice signals, a first storage means for storing the plurality of voice signals, a first playback means for retrieving a portion of the stored plurality of voice signals, and a first control means for controlling the first playback means to transmit the retrieved portion of voice signals. The portion of the stored plurality of voice signals which are retrieved are then placed onto a wireless network which is in communication with a plurality of portable units. Each of the portable units has capability of communicating with the wireless network for receiving the voice signals therefrom, for storing a received voice signal, and for playing back the stored voice signal. Finally, the first communication unit causes the stored plurality of voice signals stored on the first communication unit to be transmitted to a different one of the plurality of portable units.

摘要翻译： 在本电信系统中，有线网络接收多个语音信号并发送它们。 第一通信设备连接到有线网络。 第一通信装置包括用于接收多个语音信号的装置，用于存储多个语音信号的第一存储装置，用于检索存储的多个语音信号的一部分的第一重放装置，以及用于控制 第一重放装置，用于发送检索到的部分语音信号。 所检索的所存储的多个语音信号的部分然后被放置在与多个便携式单元通信的无线网络上。 每个便携式单元具有与无线网络进行通信的能力，用于从其接收语音信号，用于存储所接收的语音信号，并用于回放存储的语音信号。 最后，第一通信单元将存储在第一通信单元上的存储的多个语音信号发送到多个便携式单元中的不同的一个。

公开(公告)号：US5442580A

公开(公告)日：1995-08-15

申请号：US248765

申请日：1994-05-25

申请人： Gerhard P. Fettweis

发明人： Gerhard P. Fettweis

IPC分类号： G06F7/544 ,  G06F7/38

CPC分类号： G06F7/5443

摘要： A parallel processing circuit and a digital signal processor employing such a parallel circuit employs a plurality of identical multiply and accumulate (MAC) processing units. Two input signals are supplied to each of the MAC processing units. In one embodiment, a delay or a shift register delays one of the input digital signal from one MAC to another MAC. A plurality of different processed signals can be generated simultaneously based upon the supplied input digital signals, greatly increasing processing capability without increasing clock speed or increasing bandwidth access to a memory.

摘要翻译： 采用这种并联电路的并行处理电路和数字信号处理器采用多个相同的乘法和累积（MAC）处理单元。 两个输入信号被提供给每个MAC处理单元。 在一个实施例中，延迟或移位寄存器将输入数字信号中的一个从一个MAC延迟到另一个MAC。 可以基于所提供的输入数字信号同时生成多个不同的处理信号，大大增加处理能力，而不增加时钟速度或增加对存储器的带宽访问。

公开(公告)号：US5461646A

公开(公告)日：1995-10-24

申请号：US428848

申请日：1995-04-25

申请人： Kiomars Anvari

发明人： Kiomars Anvari

IPC分类号： H04B7/08 ,  H04B17/00 ,  H04B7/10 ,  H04L1/02

CPC分类号： H04B7/0857 ,  H04B17/318

摘要： A diversity combiner for a digital receiver receives a plurality of complex baseband signals (S.sub.1 (t), S.sub.2 (t)) each having an associated receive signal strength-intensity signal (RSSI.sub.1, RSSI.sub.2). The combiner differentially detects each of the complex baseband signals (S.sub.1 (t), S.sub.2 (t)) to produce a plurality of differential signals (RX.sub.1 (t), RX.sub.2 (t)) in accordance with:RX.sub.1 (t)=S.sub.1 (t).multidot.S.sub.1 *(t-T), andRX.sub.2 (t)=S.sub.2 (t).multidot.S.sub.2 *(t-T)where S.sub.x * is the complex conjugate of S.sub.x and T is a symbol delay. The differential signals (RX.sub.1 (t), RX.sub.2 (t) ) are processed to produce a selected differential signal R(t). The selected differential signal R(t) is converted to produce a plurality of converted signals D.sub.1 (t) and D.sub.2 (t) in accordance with:D.sub.1 (t)=R(t).multidot.e.sup.-j2.pi.fstD.sub.2 (t)=R(t).multidot.e.sup.+j2.pi.fstThe converted signals D.sub.1 (t) and D.sub.2 (t) are further processed to produce timing (.tau.) and frequency (f.sub.e) error estimates by: ##EQU1## where C.sub.1 (t) and C.sub.-1 (t) are the averages of D.sub.1 (t) and D.sub.2 (t) respectively.

摘要翻译： 用于数字接收机的分集合并器接收每个具有相关联的接收信号强度 - 强度信号（RSSI1，RSSI2）的多个复基带信号（S1（t），S2（t））。 组合器根据下式对差分检测复基带信号（S1（t），S2（t））以产生多个差分信号（RX1（t），RX2（t））：RX1（t）= S1（ t）xS1 *（tT）和RX2（t）= S2（t）xS2 *（tT）其中Sx *是Sx和T的复共轭是符号延迟。 差分信号（RX1（t），RX2（t））被处理以产生所选择的差分信号R（t）。 所选择的差分信号R（t）被转换以产生多个转换信号D1（t）和D2（t）：D1（t）= R（t）xe-j2 pi fst D2（t）= R （t）xe + j2 pi fst转换的信号D1（t）和D2（t）被进一步处理，以通过以下方式产生定时（τ）和频率（fe）误差估计：其中C1（t）和 C-1（t）分别是D1（t）和D2（t）的平均值。

公开(公告)号：US5602767A

公开(公告)日：1997-02-11

申请号：US521112

申请日：1995-08-29

申请人： Gerhard P. Fettweis ,  Mihran Touriguian

发明人： Gerhard P. Fettweis ,  Mihran Touriguian

IPC分类号： G06F7/60 ,  G06F7/72 ,  G06F11/10 ,  H03M13/00 ,  H03M13/03 ,  H03M13/09 ,  H03M13/15 ,  G06F7/00 ,  G06F15/00

CPC分类号： H03M13/6569 ,  G06F7/726 ,  H03M13/033 ,  H03M13/09 ,  H03M13/151

摘要： The multiply/divide circuit uses an exclusive OR function of an ALU in a DSP. The result of the exclusive OR function through accumulators and shift registers which recycle the shifted signals back to the ALU, can be made to perform the multiply or divide function. When used in a DSP for telecommunication purposes, the multiply/divide circuit can perform convolution encoding and cyclic redundancy check, among other functions, specifically for the telecommunication application.

摘要翻译： 乘法/除法电路在DSP中使用ALU的异或功能。 通过将移位信号回送到ALU的累加器和移位寄存器的异或功能的结果可以进行乘法或除法功能。 当在DSP中用于电信目的时，乘法/除法电路可以执行卷积编码和循环冗余校验以及其他功能，具体用于电信应用。

公开(公告)号：US5581579A

公开(公告)日：1996-12-03

申请号：US523032

申请日：1995-09-01

申请人： Nan-Sheng Lin ,  Ravi Subramanian ,  Kenkichi Suzuki

发明人： Nan-Sheng Lin ,  Ravi Subramanian ,  Kenkichi Suzuki

IPC分类号： H04L7/033 ,  H04L7/04 ,  H04L27/152 ,  H04L27/22

CPC分类号： H04L27/152 ,  H04L7/0334 ,  H04L7/042

摘要： In a digital wireless communication system operating between a first unit and a second unit, the first unit transmits a digitally encoded RF signal at a first frequency in a plurality of a non-contiguous time slots to the second unit. The second unit receives the digitally encoded RF signals. The received RF digitally encoded signal is converted to an intermediate frequency (IF). An A to D converter samples the received IF digitally encoded signals and generates a plurality of discrete binary symbols during one of the plurality of non-contiguous time slots. A phase error signal is generated for each one of the plurality of discrete binary symbols. A frequency error signal is generated for the subsequent symbol in accordance with .DELTA.f(n+1)=.DELTA.f(n)+g.sub.1 (.crclbar.(n)-.crclbar.(n)). The conversion of the RF signal to intermediate frequency is controlled in response to the frequency error signal. The control is adjusted after the one time slot but prior to the commencement of a subsequent one of the plurality of non-contiguous time slots.

摘要翻译： 在第一单元和第二单元之间操作的数字无线通信系统中，第一单元以多个非连续时隙中的第一频率向第二单元发送数字编码的RF信号。 第二单元接收数字编码的RF信号。 所接收的RF数字编码信号被转换成中频（IF）。 A至D转换器对所接收的IF数字编码信号进行采样，并在多个非连续时隙之一产生多个离散二进制符号。 对于多个离散二进制符号中的每一个生成相位误差信号。 根据DELTA f（n + 1）= DELTA f（n）+ g1（（ - ）（n） - + E，otl（ - ）+ EE（n））为后续符号生成频率误差信号。 响应于频率误差信号来控制RF信号到中频的转换。 控制在一个时隙之后但是在多个非连续时隙中的后续的一个时间段的开始之前被调整。

公开(公告)号：US5553076A

公开(公告)日：1996-09-03

申请号：US236588

申请日：1994-05-02

申请人： Saman Behtash ,  Christopher Flores ,  Adel Ghanem

发明人： Saman Behtash ,  Christopher Flores ,  Adel Ghanem

IPC分类号： H04L12/28 ,  H04J3/16

CPC分类号： H04W28/26 ,  H04W4/12 ,  H04W48/08 ,  H04W56/0015 ,  H04W72/0446 ,  H04W84/12 ,  Y02B60/50

摘要： A protocol for wireless local area network communication between a base stationary unit and a plurality of wireless terminals is disclosed. The main features of this protocol is based upon channel reservation requests by active wireless terminals. Contention is resolved and authorization is granted with data message signals transmitted by the authorized wireless terminal either immediately for asynchronous service or periodically for a time-based service. The system further provides for the base stationary unit to query the receipt of the data message signal by the wireless terminal authorized to receive the transmission. If no response signal is received, then the base stationary unit would authorize for itself transmission of the data message to relay it, either "over the air" or via wired connection to another base stationary unit in another data cell. The synchronous nature of the method provides for power saving by allowing the receiver and/or transmitter to be powered down during idle and other time slots.

摘要翻译： 公开了一种用于基站固定单元与多个无线终端之间的无线局域网通信的协议。 该协议的主要特征是基于主动无线终端的信道预留请求。 竞争得到解决，授权由授权无线终端发送的数据消息信号立即进行异步服务或周期性地进行基于时间的服务。 该系统进一步提供基站固定单元，通过被授权接收传输的无线终端查询数据消息信号的接收。 如果没有接收到响应信号，则基站固定单元将授权本身传输数据消息以“通过空中”或通过有线连接将其中继到另一个数据信元中的另一个基站固定单元。 该方法的同步性质通过允许接收机和/或发射机在空闲和其他时隙期间断电来提供功率节省。

公开(公告)号：US5530907A

公开(公告)日：1996-06-25

申请号：US111339

申请日：1993-08-23

申请人： Kent Pavey ,  David Feitelberg

发明人： Kent Pavey ,  David Feitelberg

IPC分类号： G06K9/03 ,  H04N1/00 ,  G06F3/14 ,  G06F13/10

CPC分类号： H04N1/00127 ,  G06K9/033 ,  H04N1/00204 ,  H04N2201/0081 ,  H04N2201/0082 ,  H04N2201/0087

摘要： A modularly configured networked document processing system has a plurality of computers communicating over a local area network. The system has fax servers and scanners to convert documents into image signals, work stations to recognize character signals from the image signals, to process the character signals, and to display the unintelligible processed character signals for user intervention. In addition, the system has a gateway for communication to a mainframe computer.

摘要翻译： 模块化配置的联网文档处理系统具有通过局域网通信的多台计算机。 该系统具有传真服务器和扫描仪，用于将文档转换为图像信号，工作站识别来自图像信号的字符信号，处理字符信号，并显示不可理解的处理字符信号以供用户干预。 此外，该系统具有用于与主机通信的网关。