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51.发明授权Methodology for received signal enhancement utilizing delay diversity processing 失效使用延迟分集处理的接收信号增强方法
公开(公告)号：US6118807A
公开(公告)日：2000-09-12
申请号：US535947
申请日：1995-09-28
IPC分类号： H04B1/7073 , H04B1/7117 , H04N5/225 , A61F2/06 , H04L27/30
CPC分类号： H04B1/7073 , H04B1/7117
摘要： A delay diversity processor for use in receiving direct sequence spread spectrum data utilizes multipath signals to enhance bit synchronization performance by integrating the magnitude of each multipath signal to allow for erratic fluctuations in the multipath signal. As a result, the receiver is less prone to sudden signal strength variation that might trigger erroneous bit resynchronization. The delay diversity processor comprises a first circuit which determines a magnitude value for each of a plurality of correlated signal samples of individual data bits of plural data streams of the received spread spectrum data. A second circuit integrates each of the magnitude values over a period of time corresponding to receipt of a plurality of the individual data bits. The integrated magnitude values provide a measure of confidence of a particular one of the correlated signal samples with respect to remaining ones of the correlated signal samples. The correlated signal sample having the most consistently high measure of confidence is thus most likely to contain reliable and valid data. In an embodiment of the delay diversity processor, the digital delay circuit of the second circuit provides for resetting of the integrated magnitude values within following interruption of receipt of the spread spectrum data. The data values within the digital delay circuit can be reset either to zero, or to a predetermined value. The use of a predetermined value improves the ability of the delay diversity processor to generate valid data following an interruption of the spread spectrum data.
摘要翻译： 用于接收直接序列扩展频谱数据的延迟分集处理器利用多径信号来增强比特同步性能，通过对每个多路径信号的幅度进行积分以允许多径信号中的不稳定波动。 结果，接收机不太容易发生可能触发错误位重新同步的突发信号强度变化。 延迟分集处理器包括第一电路，其确定接收到的扩展频谱数据的多个数据流的各个数据比特的多个相关信号样本中的每一个的幅度值。 第二电路在对应于多个单独数据位的接收的一段时间内对每个幅度值进行积分。 集成的幅度值提供相对于相关信号样本中的特定一个相对于相关信号样本中的剩余信号样本的置信度的量度。 因此，具有最一致的高置信度的相关信号样本最有可能包含可靠且有效的数据。 在延迟分集处理器的实施例中，第二电路的数字延迟电路提供在接收扩展频谱数据的随后中断之前复位积分幅度值。 数字延迟电路内的数据值可以重置为零或预定值。 使用预定值提高延迟分集处理器在扩展频谱数据的中断之后产生有效数据的能力。
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公开(公告)号：US6118806A
公开(公告)日：2000-09-12
申请号：US320680
申请日：1999-05-27
申请人： Sumaru Niida , Toshinori Suzuki
发明人： Sumaru Niida , Toshinori Suzuki
IPC分类号： H04J13/00 , H04B1/7115 , H04B7/02 , H04B7/08 , H04L1/02 , H04L1/06 , H04B15/00 , H04K1/00 , H04L27/30
CPC分类号： H04B1/712 , H04B7/0865 , H04L1/06
摘要： An apparatus for combining signals includes RAKE receivers 10, 20, noise-power measuring apparatuses 30, 40, and a branch combiner 50. The RAKE receivers 10, 20 are the same in number as the antenna branches, and each RAKE receiver combines received signals by using a weight based on an amplitude of each received signal. Each of the noise-power measuring apparatus 30, 40 measures a sum of an interference power and a background-noise power in an output signal from each RAKE receiver. The branch combiner 50 multiplies the output signal from each RAKE receiver by an inverse of the sum measured by the noise-power measuring apparatus, and then adds up the value obtained by each multiplication.
摘要翻译： 用于组合信号的装置包括RAKE接收机10,20，噪声功率测量装置30,40和分支组合器50.RAW接收机10,20的数量与天线分支相同，并且每个RAKE接收机组合接收信号 通过使用基于每个接收信号的振幅的权重。 每个噪声功率测量装置30,40测量来自每个RAKE接收机的输出信号中的干扰功率和背景噪声功率之和。 分支组合器50将来自每个RAKE接收机的输出信号乘以由噪声功率测量装置测量的和的倒数，然后将通过每次相乘得到的值相加。
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公开(公告)号：US6108369A
公开(公告)日：2000-08-22
申请号：US890793
申请日：1997-07-11
申请人： Fredrik Ovesjo , Erik Dahlman
发明人： Fredrik Ovesjo , Erik Dahlman
CPC分类号： H04J13/0044 , H04B7/264 , H04J13/0077 , H04J13/20
摘要： Variable spreading factors and multi-code transmissions are flexibly accommodated by assigning spreading codes in accordance with the described techniques. Spreading codes are assigned so that the control channel is orthogonal to all physical channels in the composite spread spectrum signal. Power balance between in-phase (I) and quadrature (Q) branches in the transmitter is also provided by assigning physical channels to appropriate branches and splitting physical channels, where necessary.
摘要翻译： 可变扩展因子和多码传输通过根据所描述的技术分配扩展码来灵活地适应。 分配扩展码使得控制信道与复合扩频信号中的所有物理信道正交。 发射机的同相（I）和正交（Q）分支之间的功率平衡也是通过将物理信道分配给适当的分支和分割物理信道来提供的。
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公开(公告)号：USRE36791E
公开(公告)日：2000-07-25
申请号：US252842
申请日：1994-06-02
申请人： Alan C. Heller
发明人： Alan C. Heller
CPC分类号： G07C9/00111 , G01S5/06 , G06K7/0008
摘要： A radiolocation system for multipath environments, such as for tracking objects in a semiconductor fabrication facility (FIGS. 1a-1b), includes an array of receivers (20) distributed within the tracking area, coupled to a system processor (40) over a LAN. A TAG transmitter (30) located with each object transmits, at selected intervals, spread spectrum TAG transmissions including at least a unique TAG ID. In a high resolution embodiment, object location is accomplished by time-of-arrival (TOA) differentiation, with each receiver (FIG. 2b) including a TOA trigger circuit (64) for triggering on arrival of a TAG transmission, and a time base latching circuit (65) for latching the TOA count from an 800 MHz time base counter. In a low resolution embodiment, each receiver of the array is assigned a specific location-area, and receives TAG transmissions almost exclusively from TAGs located in that area, thereby eliminating the need for any time-of-arrival circuitry.
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55.发明授权Method and apparatus for spreading and despreading data in a spread-spectrum communication system 有权用于在扩频通信系统中扩展和解扩数据的方法和装置
公开(公告)号：US6091759A
公开(公告)日：2000-07-18
申请号：US200397
申请日：1998-11-24
申请人： Ron Rotstein , Yuda Yehuda Luz , Robert John Corke
发明人： Ron Rotstein , Yuda Yehuda Luz , Robert John Corke
CPC分类号： H04J13/0048 , H04B1/707 , H04L27/2626 , H04L5/026
摘要： A current mode of operation is provided to a Walsh spreader (203), and based on the current mode of operation, the Walsh spreader (203) either varies a Walsh code at a symbol rate, or holds the Walsh code constant. During multi-carrier transmission a first symbol within a data stream (210) is spread with a first Walsh code, while symbols immediately preceding and following the first symbol are spread by a another, differing Walsh code. The sequence of Walsh codes exiting the spreader (201) is further scrambled by a pair of Pseudo-Noise (PN) codes (224) that are held constant for three Walsh code periods during multi-carrier transmission, and are not held constant during direct-spread transmission.
摘要翻译： 向沃尔什扩展器（203）提供当前操作模式，并且基于当前操作模式，沃尔什扩展器（203）以符号速率改变沃尔什码，或者维持沃尔什码恒定。 在多载波传输期间，数据流（210）内的第一符号以第一沃尔什码扩展，而紧邻第一符号之前和之后的符号由另一不同的沃尔什码扩展。 离散扩展器（201）的沃尔什码序列进一步被多载波传输期间的三个沃尔什码周期保持恒定的伪噪声（PN）码对（224）加扰，并且在直接 扩展传输。
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公开(公告)号：US6088381A
公开(公告)日：2000-07-11
申请号：US996843
申请日：1997-12-23
申请人： Thomas C. Myers, Jr.
发明人： Thomas C. Myers, Jr.
CPC分类号： H04J13/00 , H04B10/25752 , H04J1/04 , H04W88/085
摘要： A system for transporting radio frequency (RF) signals across a RF network comprises a central transport unit and a remote transport unit. The frequencies of at least some of the RF signals to be transported hop in accordance with predetermined hopping sequences. The central transport unit uses the hopping sequences to convert the hopping frequencies into fixed frequencies for efficient transport through the RF network. The remote transport unit uses the hopping sequences to convert the fixed frequencies back to the original hopping frequencies. The transport system is also capable of reverse operation in the direction from the remote transport unit to the central transport unit.
摘要翻译： 用于在RF网络上传送射频（RF）信号的系统包括中央传输单元和远程传输单元。 要传输的至少一些RF信号的频率根据预定的跳频序列跳跃。 中央传输单元使用跳频序列将跳频转换成固定频率，以通过RF网络进行有效的传输。 远程传输单元使用跳频序列将固定频率转换回原始跳频。 运输系统还能够在从远程运输单元到中央运输单元的方向上反向运行。
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公开(公告)号：US6069915A
公开(公告)日：2000-05-30
申请号：US895431
申请日：1997-07-16
CPC分类号： H04B1/7075 , H04B1/70755 , H04B1/709 , H04B2201/7071
摘要： A code acquisition circuit for acquiring code synchronization between an n-chip spreading code of a received spread spectrum radio signal and an n-chip local reference code generated by a code generator within a receiver, includes a variable delay means which operates to introduce a delay shift into the said received radio signal. A correlator operates to correlate n-chips of the local reference code with n-samples of the received signal communicated thereto, and generates a correlation signal representative of a result of the correlation. A code acquisition controller operates in combination with the correlation signal to maintain the delay shift for at least one correlation and thereafter to change the delay shift, wherein the delay shift is a fraction of one chip period.
摘要翻译： 一种用于获取接收的扩频无线电信号的n码片扩展码与由接收机内的码发生器产生的n码片本地参考码之间的码同步的码获取电路，包括：可变延迟装置，用于引入延迟 移入所述接收到的无线电信号。 相关器操作以将本地参考码的n码与所传送的接收信号的n样本相关，并产生表示相关结果的相关信号。 代码获取控制器与相关信号相结合地操作，以维持至少一个相关的延迟移位，此后改变延迟移位，其中延迟偏移是一个码片周期的一小部分。
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公开(公告)号：US6061359A
公开(公告)日：2000-05-09
申请号：US969343
申请日：1997-11-28
IPC分类号： H04B1/707 , H04B7/212 , H04B7/216 , H04B15/00 , H04J13/00 , H04J13/10 , H04K1/00 , H04L12/28 , H04L12/56 , H04L27/30
摘要： A system and method for encoding and transmitting data with a spread-spectrum packet-switched system. Data to be transmitted by a packet transmitter are encoded for privacy and to restrict intelligent receipt of the data to the intended recipient. The encoded data is demultiplexed into sub-data-sequence signals which are spread-spectrum processed and then combined as a multichannel spread-spectrum signal. The multichannel spread-spectrum signal is concatenated with a header to output a packet-spread-spectrum signal which is transmitted over radio waves to a packet receiver. The packet receiver obtains timing for the multichannel spread-spectrum signal from the header. The multichannel spread-spectrum signal is then despread and multiplexed as received-encoded data. The received-encoded data is decoded by the intended recipient and is stored in a receiver memory for output.
摘要翻译： 一种利用扩频分组交换系统对数据进行编码和发送的系统和方法。 由数据包发送器发送的数据被编码为隐私并且将数据的智能接收限制到预期的接收者。 编码数据被解复用为子数据序列信号，其被扩频处理，然后被组合为多通道扩频信号。 多信道扩频信号与报头相连，以将通过无线电波传输的分组扩展频谱信号输出到分组接收机。 分组接收机从报头获得多信道扩频信号的定时。 然后将多通道扩频信号解扩和复用为接收编码数据。 接收编码的数据由预期接收者解码并存储在接收机存储器中用于输出。
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公开(公告)号：US6047015A
公开(公告)日：2000-04-04
申请号：US546554
申请日：1995-10-20
申请人： Masatoshi Watanabe , Kazuyuki Miya , Osamu Kato
发明人： Masatoshi Watanabe , Kazuyuki Miya , Osamu Kato
CPC分类号： H04B1/709 , H04B1/692 , H04B7/2628
摘要： A mobile radio apparatus includes a base station and a mobile station which communicate with each other by a hybrid code division multiple access scheme. The base station selects a hopping pattern in a frequency hopping method so as to completely avoid overlapping of a carrier for a forward link signal with a carrier for a reverse link signal at the same time, and transmits the forward link signal in a predetermined frequency band. The mobile station similarly transmits the reverse link signal. The mobile station has a multiplier for multiplying the forward link signal by a carrier at the same frequency as the carrier for the forward link signal to derive a received signal, a communication channel correlator for detecting a correlation of the received signal to separate a communication channel signal, a received power level detector circuit for detecting a received power level of the communication channel signal, and a transmission power level control signal for controlling a transmission power level of the reverse link signal, when transmitted to the base station, based on the received power level of the communication channel signal, using a carrier at the same frequency as the carrier for the forward link signal when the received power level of the communication channel signal is detected.
摘要翻译： 移动无线电设备包括通过混合码分多址方案相互通信的基站和移动台。 基站以跳频方式选择跳频图案，以便完全避免前向链路信号的载波与用于反向链路信号的载波同时重叠，并且将预定频带中的前向链路信号 。 移动站类似地发送反向链路信号。 移动站具有乘法器，用于将前向链路信号乘以与用于前向链路信号的载波相同频率的载波以导出接收信号;通信信道相关器，用于检测接收信号的相关性以分离通信信道 信号，用于检测通信信道信号的接收功率电平的接收功率电平检测器电路，以及发送功率电平控制信号，用于当基于接收到的信号发送到基站时控制反向链路信号的发送功率电平 当检测到通信信道信号的接收功率电平时，使用与前向链路信号的载波相同频率的载波的通信信道信号的功率电平。
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公开(公告)号：US6031865A
公开(公告)日：2000-02-29
申请号：US905376
申请日：1997-08-04
CPC分类号： H04L27/2042 , H04B1/707
摘要： A transmitter for a communication system transmits consecutive chips of a signal shifted in phase +/-90 degrees +/- nan angle between 0 degrees and 45 degrees which is a function of a spreading gain.
摘要翻译： 用于通信系统的发射机传输在0度和45度之间以+/- 90度+/-纳角的相位偏移的信号的连续码片，这是扩展增益的函数。
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