公开(公告)号：WO1994019876A1

公开(公告)日：1994-09-01

申请号：PCT/US1994001150

申请日：1994-02-01

Applicant: QUALCOMM INCORPORATED

Inventor： QUALCOMM INCORPORATED ,  PADOVANI, Roberto ,  ZIV, Noam

IPC: H04B07/005

CPC classification number: H04W52/267 ,  H04B2201/70705 ,  H04L1/0046 ,  H04L1/08 ,  H04L1/201 ,  H04L25/0262 ,  H04W52/12 ,  H04W52/20 ,  H04W52/50

Abstract: In a communication system in which direct sequence spread spectrum modulation techniques are used, interference is generated in communications by remote stations since the communications share the same frequency spectrum. In order to increase system capacity the power level of the remote station transmitters are controlled by the local station. A setpoint in generated at the local station by a power control processor (118) and compared by a comparator (120) with the remote station signal strength measured at the local station by a power averager (114). The result of this comparison is used to generate power level adjustment commands by a command generator (122) which are transmitted to the remote station. The remote station is responsive to the power level adjustment commands for increasing or decreasing remote station transmitter power. In a spread spectrum communication system in which data is encoded at variable data rates, the local station determines via a rate determination processor (116) the rate at which received data was encoded by the transmitting remote station. The data is decoded by decoder (112) at each possible rate with error metrics generated that are representative of the quality of the data decoded at each rate. A rate decision algorithm is used by processor (116) to evaluate the error metrics and make a decision on the rate at which the data was transmitted. A pattern match of rate decisions is used by processor (118) to modify a setpoint so as to closely control the transmitting power of the remote station as a function of the quality of the received data.

Abstract translation: 在使用直接序列扩频调制技术的通信系统中，由于通信共享相同的频谱，所以在远程站的通信中产生干扰。 为了提高系统容量，远程站发射机的功率电平由本地站控制。 由本地站由功率控制处理器（118）产生并由比较器（120）与由功率平均器（114）在本地站测量的远程站信号强度进行比较的设定点。 该比较的结果被用于通过发送到远程站的命令发生器（122）产生功率电平调整命令。 远程站响应于用于增加或减少远程站发射机功率的功率电平调整命令。 在数据以可变数据速率编码的扩展频谱通信系统中，本地站经由速率确定处理器（116）确定接收的数据由发送的远程站编码的速率。 解码器（112）以每个可能的速率对数据进行解码，其中生成的误差度量代表以每个速率解码的数据的质量。 处理器（116）使用速率判定算法来评估误差量度并对数据发送的速率作出决定。 处理器（118）使用速率决定的模式匹配来修改设定点，以便根据接收到的数据的质量密切地控制远程站的发射功率。

公开(公告)号：WO1993020630A1

公开(公告)日：1993-10-14

申请号：PCT/US1993003065

申请日：1993-04-01

Applicant: QUALCOMM INCORPORATED

Inventor： QUALCOMM INCORPORATED ,  RUETH, Timothy, I. ,  WEAVER, Lindsay, A., Jr. ,  GILHOUSEN, Klein, S.

IPC: H04K01/00

CPC classification number: H04J13/10 ,  G06F7/584 ,  G06F2207/581 ,  G06F2207/583 ,  H03K3/84 ,  H04J13/0022 ,  H04L9/0662 ,  H04L2209/046 ,  H04L2209/12

Abstract: A maximal length linear sequence pseudorandom noise (PN) sequence generator for generating an augmented length PN sequence of length 2N. The PN generator includes circuitry (10) for generating a PN sequence of length 2N -1 chips. A sequence augmenting circuit (40, 42) is included which inserts at least one additional chip in the PN sequence at a predetermined position within the PN sequence so as to provide an output of an augmented PN sequence of length 2N chips. The generator may also include sequence shifting circuitry (30) which is responsive to a mask input for providing a predetermined shift in the output augmented PN sequence without incurring a transition period where the shifted output is invalid.

公开(公告)号：WO1993018601A1

公开(公告)日：1993-09-16

申请号：PCT/US1993001982

申请日：1993-03-04

Applicant: QUALCOMM INCORPORATED

Inventor： QUALCOMM INCORPORATED ,  TIEDEMANN, Edward, G., Jr. ,  WEAVER, Lindsay, A., Jr. ,  PADOVANI, Roberto

IPC: H04L27/30

CPC classification number: H04W74/0841 ,  H04B1/707 ,  H04B1/7103 ,  H04B7/2628 ,  H04B2201/709709 ,  H04J13/0022 ,  H04J13/10 ,  H04J13/16 ,  H04L1/188 ,  H04L1/1887 ,  H04W52/48 ,  H04W52/50 ,  H04W74/002 ,  H04W74/08 ,  H04W74/0833 ,  H04W74/0866

Abstract: Collisions between messages simultaneously transmitted by multiple spread spectrum transmitters are reduced by distributing the transmissions over the available resources of the receiver. Each mobile station uses one or more randomization methods to distribute its transmissions. Each mobile station includes a microprocessor (100); an encoder (140); a timing generator (136); a PN long code sequence generator (146); and XOR gate (152). The system is used in a CDMA mobile telephone system.

Abstract translation: 通过在接收机的可用资源上分发传输来减少由多个扩频发射机同时发送的消息之间的冲突。 每个移动台使用一种或多种随机化方法来分发其传输。 每个移动站包括微处理器（100）; 编码器（140）; 定时发生器（136）; PN长码序列发生器（146）; 和XOR门（152）。 该系统用于CDMA移动电话系统。

公开(公告)号：WO1993014588A1

公开(公告)日：1993-07-22

申请号：PCT/US1993000406

申请日：1993-01-19

Applicant: QUALCOMM INCORPORATED

Inventor： QUALCOMM INCORPORATED ,  PADOVANI, Roberto ,  TIEDEMANN, Edward, G., Jr. ,  WEAVER, Lindsay, A., Jr. ,  BUTLER, Brian, K.

IPC: H04L27/30

CPC classification number: H04L1/0057 ,  H04J3/1688 ,  H04J3/22 ,  H04J3/24 ,  H04J13/0048 ,  H04J13/18 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/0071 ,  H04L1/08

Abstract: In a CDMA cellular communication system, a forward CDMA channel is used to transmit information from a cell base to the mobile station. Conversely, a reverse CDMA channel is used to transmit information from the mobile station to the cell base station. The transmit portion of the mobile transceiver includes a microphone (12), a codec (16), a vocoder (14), a mask circuit (32), a convolutional encoder (22), a block interleaver (24), a 64-ary orthogonal modulator, an in-phase PN generator (38), a quadrature PN generator (40), filtering circuits (42, 44, 50, 52), a quadrature modulator (54) and a transmitter (56).

Abstract translation: 在CDMA蜂窝通信系统中，前向CDMA信道被用于从小区基站向移动台发送信息。 相反，使用反向CDMA信道来将信息从移动台传送到小区基站。 移动收发器的发送部分包括麦克风（12），编解码器（16），声码器（14），掩码电路（32），卷积编码器（22），块交织器（24） 同相PN发生器（38），正交PN发生器（40），滤波电路（42,44,50,52），正交调制器（54）和发射机（56）。

公开(公告)号：WO1993006550A1

公开(公告)日：1993-04-01

申请号：PCT/US1992008128

申请日：1992-09-25

Applicant: QUALCOMM INCORPORATED

Inventor： QUALCOMM INCORPORATED ,  ZEHAVI, Ephraim

IPC: G06F11/10

CPC classification number: H03M13/256 ,  H03M13/25 ,  H03M13/3776 ,  H03M13/41 ,  H04L1/0054 ,  H04L27/186 ,  H04L27/2332

Abstract: A decoder (32) for decoding trellis coded data in which the received signal is assigned a sector value by a sector value lookup table (38) corresponding to the phase of the signal in accordance with a predetermined signal space sectorization format. A Viterbi decoder (40) is used to reconstruct from the received signal an estimate of a data bit that was coded for transmission. This estimate is re-encoded by a convolutional encoder (46) and provided to a trellis output mapper (52) along with the sector value. The trellis mapper (52) in response to the input re-encoded estimate and sector value provides an estimate of an uncoded data bit transmitted with the coded data bit.

Abstract translation: 一种用于解码网格编码数据的解码器（32），其中根据预定的信号空间扇区格式，通过与信号的相位对应的扇区值查找表（38）向扇区值分配接收信号。 维特比解码器（40）用于从接收到的信号重建被编码用于传输的数据比特的估计。 该估计由卷积编码器（46）重新编码并与扇区值一起提供给网格输出映射器（52）。 响应于输入的重新编码的估计和扇区值，网格映射器（52）提供用编码数据位传输的未编码数据位的估计。

公开(公告)号：WO1992021181A1

公开(公告)日：1992-11-26

申请号：PCT/US1992004160

申请日：1992-05-17

Applicant: QUALCOMM INCORPORATED

Inventor： QUALCOMM INCORPORATED ,  AMES, William, G. ,  JACOBS, Irwin, M. ,  WEAVER, Lindsay, A., Jr. ,  GILHOUSEN, Klein, S.

IPC: H04B07/185

CPC classification number: G01S13/876 ,  G01S5/0009 ,  G01S5/12 ,  G01S13/46 ,  G01S2013/466

Abstract: A system and method for determining the position of an airborne object (12') using a fixed station (10) and a pair of earth orbit satellites (S1, S2) whose positions are known. Separate periodic signals are transmitted from the fixed station (10) via the first and second satellites (S1, S2) to the object (12') whose position is to be determined. The phase offset in periodic characteristics of the periodic signals as received from the first and second satellites (S1, S2) is measured at the object (12'). The phase offset corresponds to a relative time difference in propagation of the signals traveling two different paths to the object. The object (12') transmits via the first satellite (S1) a return signal indicative of the measured relative time difference. This return signal is activated some time in the future according to the object local time, which is slaved to receipt of the periodic signal sent through the first satellite. This future time is the start of the particular time period as decided by the fixed station's schedule. At the fixed station (10), an instantaneous round trip delay, determined by the time offset of the current transmission clock time relative to the receive clock time of reception of the return signal, along with the measured relative time difference sent back on the return signal, is used to calculate the distances between the first and second satellites (S1, S2) to the object. From these distances, along with the combined altitude of the object with the distance from the surface of the earth to the center of the earth, the position of the object is calculated.

Abstract translation: 一种使用固定站（10）和其位置已知的一对地球轨道卫星（S1，S2）来确定机载物体（12'）的位置的系统和方法。 分离的周期信号经由第一和第二卫星（S1，S2）从固定站（10）发送到其位置要确定的对象（12'）。 在物体（12'）处测量从第一和第二卫星（S1，S2）接收的周期性信号的周期特性中的相位偏移。 相位偏移对应于传播到对象的两个不同路径的信号的传播的相对时间差。 物体（12'）经由第一卫星（S1）发送指示所测量的相对时间差的返回信号。 该返回信号在将来根据对象本地时间被激活一段时间，该对象本地时间被接收通过第一卫星发送的周期信号。 这个未来时间是由固定电台的时间表决定的特定时间段的开始。 在固定站（10）处，由当前传输时钟时间相对于接收返回信号的接收时钟时间的时间偏移确定的瞬时往返延迟以及在返回时发回的测量的相对时间差 信号用于计算第一和第二卫星（S1，S2）之间的距离。 从这些距离，以及与地球表面到地球中心距离的物体的组合高度，计算物体的位置。