公开(公告)号：US20080198905A1

公开(公告)日：2008-08-21

申请号：US11815207

申请日：2006-01-19

Applicant: Xia Zhu ,  Yan Li

Inventor： Xia Zhu ,  Yan Li

IPC: H04B1/707

CPC classification number: H04B1/707 ,  H04B2201/70707

Abstract: The present invention provides a method for despreading spread signal used in a receiver of a wireless communication system, comprising the steps of: preprocessing spread signal to derive a group of spreading chips corresponding to a data symbol; processing Hie spreading chips to extract cophase components and orthogonal components of each of the spreading chips; and converting and combining the group of cophase components and orthogonal components according to a preset selecting signal to derive a group of despreading chips. The present invention further provides an apparatus for carrying out the above-mentioned method, which significantly simplifies the design of a dispreading circuit and reduces the area of the dispreading circuit

Abstract translation: 本发明提供了一种在无线通信系统的接收机中使用的解扩展扩展信号的方法，包括以下步骤：预处理扩展信号以导出对应于数据符号的扩展码组; 处理Hie扩展芯片以提取每个扩展芯片的同相分量和正交分量; 并根据预设的选择信号转换和组合同相分量组和正交分量，以得到一组去扩频芯片。 本发明还提供了一种用于执行上述方法的装置，其显着简化了分散电路的设计并减小了分散电路的面积

公开(公告)号：US07415084B2

公开(公告)日：2008-08-19

申请号：US10660842

申请日：2003-09-12

Applicant: Philip J. Pietraski ,  Alpaslan Demir ,  Donald M. Grieco

Inventor： Philip J. Pietraski ,  Alpaslan Demir ,  Donald M. Grieco

IPC: H03D1/04

CPC classification number: H04B1/70735 ,  H04B1/70755 ,  H04B1/7083 ,  H04B1/709 ,  H04B1/7103 ,  H04B2201/70707

Abstract: The invention provides embodiments to facilitate cell search. In one embodiment, received samples are split into a plurality of sample sets for processing. Each of the sets is processed and an accumulated result is divided by an estimated noise value. In another embodiment, a code correlator correlates the received signal with a primary synchronization code and an auxiliary code correlator having a same length as the code correlator correlates the received signal with a code having a low cross correlation with the primary synchronization code. In another embodiment, a division of an accumulated result with a noise estimate is performed using indexes of the most significant bits.

Abstract translation: 本发明提供了便于小区搜索的实施例。 在一个实施例中，将接收到的样本分成多个样本集进行处理。 处理每个集合，并将累积结果除以估计的噪声值。 在另一个实施例中，码相关器将接收的信号与主同步码相关，并且与码相关器具有相同长度的辅助码相关器将接收的信号与与主同步码具有低互相关的代码相关。 在另一个实施例中，使用最高有效位的索引来执行累积结果与噪声估计的分割。

公开(公告)号：US07406102B2

公开(公告)日：2008-07-29

申请号：US10613476

申请日：2003-07-02

Applicant: Robert W. Boesel ,  Theodore J. Myers ,  Tien Q. Nguyen

Inventor： Robert W. Boesel ,  Theodore J. Myers ,  Tien Q. Nguyen

IPC: H04L12/28

CPC classification number: H04B1/712 ,  H04B1/7117 ,  H04B2201/70701 ,  H04B2201/70707 ,  H04B2201/7071

Abstract: A method of multi-mode communications includes receiving signals from multiple sources at a plurality of sample buffers, referencing the plurality of sample buffers for a first source at one time and referencing the plurality of sample buffers for a second source at another time, and communicating data from the referenced plurality of sample buffers to a processing unit. The processing unit concurrently receives inputs from buffers in the plurality of sample buffers and outputs to other buffers in the plurality of sample buffers.

Abstract translation: 多模式通信的方法包括在多个采样缓冲器处接收来自多个源的信号，一次参考用于第一源的多个采样缓冲器，并在另一时间参考用于第二源的多个采样缓冲器，以及通信 从参考的多个采样缓冲器到处理单元的数据。 处理单元同时从多个采样缓冲器中的缓冲器接收输入，并输出到多个采样缓冲器中的其它缓冲器。

公开(公告)号：US20080089448A1

公开(公告)日：2008-04-17

申请号：US11546062

申请日：2006-10-11

Applicant: Lidwine Martinot ,  Aiguo Yan ,  Marko Kocic ,  Thomas J. Barber ,  John Zijun Shen

Inventor： Lidwine Martinot ,  Aiguo Yan ,  Marko Kocic ,  Thomas J. Barber ,  John Zijun Shen

IPC: H04L27/06

CPC classification number: H04B1/7105 ,  H04B2201/70707 ,  H04L25/0224

Abstract: A joint detection system and associated methods are provided. A joint detection system is configured to perform joint detection of received signals. The joint detection system includes a joint detector accelerator configured to perform an operation of the joint detection of the received signals, wherein the joint detection includes computing joint detection variables. The operation includes a multiply and accumulate operation resulting in a value in an accumulator, and the value in the accumulator includes a plurality of bits. The joint detector accelerator is configured to select a subset of bits of the plurality of bits of the value in the accumulator, where the subset of bits selected is configurable. The joint detector accelerator is further configured to store the subset of bits into a memory as a fixed point representation.

Abstract translation: 提供联合检测系统及相关方法。 联合检测系统被配置为执行接收信号的联合检测。 联合检测系统包括联合检测器加速器，其被配置为执行对接收信号的联合检测的操作，其中联合检测包括计算关节检测变量。 该操作包括产生累加器中的值的乘法和累加运算，累加器中的值包括多个位。 联合检测器加速器被配置为选择累加器中的值的多个比特的子集，其中选择的比特的子集是可配置的。 联合检测器加速器还被配置为将位的子集存储到存储器中作为固定点表示。

公开(公告)号：US20080089447A1

公开(公告)日：2008-04-17

申请号：US11665501

申请日：2005-10-14

Applicant: Masafumi Usuda ,  Anil Umesh ,  Takehiro Nakamura

Inventor： Masafumi Usuda ,  Anil Umesh ,  Takehiro Nakamura

IPC: H04B1/69

CPC classification number: H04B1/707 ,  H04B2201/70703 ,  H04B2201/70707 ,  H04L1/0039 ,  H04W4/18 ,  H04W88/08

Abstract: A radio base station related to the present invention includes: a signal storing unit configured to store baseband signals received and over-sampled; a format determining unit configured to determine transport formats of the baseband signals; and a despreader unit configured to despread the baseband signals stored in the signal storing unit, in accordance with the transport formats determined by the format determining unit, after the determination by the format determining unit.

Abstract translation: 与本发明有关的无线基站包括：信号存储单元，被配置为存储接收和过采样的基带信号; 格式确定单元，被配置为确定基带信号的传输格式; 以及解扩器单元，被配置为在由格式确定单元确定之后，根据由格式确定单元确定的传输格式来解扩存储在信号存储单元中的基带信号。

公开(公告)号：US20070298739A1

公开(公告)日：2007-12-27

申请号：US11746031

申请日：2007-05-08

Applicant: Subramanya Rao ,  Da-Shan Shiu ,  Jeremy Lin ,  Jeong Kim

Inventor： Subramanya Rao ,  Da-Shan Shiu ,  Jeremy Lin ,  Jeong Kim

IPC: H04B1/18

CPC classification number: H04B1/7077 ,  H04B1/70753 ,  H04B2201/70707

Abstract: Techniques for segmented CDMA searching are disclosed. In one aspect, a searcher comprises a plurality of storage elements selectable for performing a plurality of segmentable search tasks, each storage element operable for storage of and access to state information for one of the plurality of search tasks. In another aspect, a first search task is interrupted in progress, the state information for the first task is stored, a second search task is performed, and the first search task is continued using the stored state information. In yet another aspect, a search task is segmented into smaller search segments, sized to fit within contiguous available time in the searcher. Various other aspects of the invention are also presented. These aspects have the benefit of circuit area and search-time efficiency which translate into reduced costs, increased standby time, increased acquisition speed, higher quality signal transmission, increased data throughput, decreased power, and improved overall system capacity.

Abstract translation: 公开了分段CDMA搜索的技术。 在一个方面，搜索器包括可选择用于执行多个可分割搜索任务的多个存储元件，每个存储元件可操作用于存储和访问多个搜索任务之一的状态信息。 在另一方面，第一搜索任务在进行中中断，存储第一任务的状态信息，执行第二搜索任务，并且使用所存储的状态信息继续第一搜索任务。 在另一方面，搜索任务被分割成较小的搜索段，其大小适合于搜索者中的连续可用时间。 还提出了本发明的各种其它方面。 这些方面具有电路面积和搜索时间效率的优点，从而降低了成本，增加了待机时间，提高了采集速度，提高了信号传输质量，提高了数据吞吐量，降低了功耗，提高了整体系统容量。

公开(公告)号：US20070291821A1

公开(公告)日：2007-12-20

申请号：US11849944

申请日：2007-09-04

Applicant: W. Dobson ,  Dirk Ostermiller ,  Sy Prestwich ,  Scott Bevan

Inventor： W. Dobson ,  Dirk Ostermiller ,  Sy Prestwich ,  Scott Bevan

IPC: H04B1/69

CPC classification number: H04J13/0022 ,  H04B1/7093 ,  H04B2201/70703 ,  H04B2201/70707

Abstract: A spread spectrum communications system using long, scalable PN sequences to achieve variable communication rates using a low-complexity and scalable matched filter architecture to provide a large processing gain, robust recovery of multiple devices in long reach, high ambient-noise environments.

Abstract translation: 一种使用长度可扩展的PN序列的扩展频谱通信系统，可使用低复杂度和可扩展的匹配滤波器架构实现可变通信速率，以提供大的处理增益，长距离多个设备的强大恢复，高环境噪声环境。

公开(公告)号：US07292664B2

公开(公告)日：2007-11-06

申请号：US10684217

申请日：2003-10-10

Applicant: Francesco Pappalardo ,  Giuseppe Avellone ,  Elena Salurso ,  Agostino Galluzzo

Inventor： Francesco Pappalardo ,  Giuseppe Avellone ,  Elena Salurso ,  Agostino Galluzzo

IPC: H04L7/00

CPC classification number: H04B1/70735 ,  H04B1/708 ,  H04B1/7083 ,  H04B2201/70702 ,  H04B2201/70707

Abstract: To obtain frame synchronization and identify the cell codegroup in a cellular communication system (such as a system based upon the standard 3GPP FDD), there are available the synchronization codes organized in chips or letters transmitted at the beginning of respective slots. Slot synchronization is obtained previously in a first step of the operation of cell search. During a second step, there are acquired, by means of correlation or fast Hadamard transform, the energy values corresponding to the respective individual letters with reference to the possible starting positions of the corresponding frame within the respective slot. Operating in a serial way at the end of acquisition of the aforesaid energy values of the individual letters, or else operating in parallel, the energies of the corresponding words are determined. Of these energies only the maximum word-energy value and the information for the corresponding starting position are stored in a memory structure. Said maximum value and said starting position identify, respectively, the cell codes and the frame synchronization sought. One application is in mobile communication systems based upon standards such as UMTS, CDMA2000, IS95, or WBCDMA.

Abstract translation: 为了获得帧同步并在蜂窝通信系统（例如基于标准3GPP FDD的系统）中识别小区代码组，可以使用以相应时隙开头发送的芯片或字母组织的同步码。 在小区搜索的操作的第一步骤中先前获得了时隙同步。 在第二步骤中，通过相关或快速Hadamard变换，参照各个时隙内对应的帧的可能的起始位置获取与各个字母对应的能量值。 在单个字母的上述能量值的获取结束时以串行方式操作，或者并行操作，确定相应词语的能量。 在这些能量中，只有最大字能量值和对应起始位置的信息被存储在存储器结构中。 所述最大值和所述起始位置分别识别所述小区代码和所述帧同步。 一种应用是基于UMTS，CDMA2000，IS95或WBCDMA等标准的移动通信系统。

公开(公告)号：US20070253396A1

公开(公告)日：2007-11-01

申请号：US11824792

申请日：2007-07-02

Applicant: Jung-Lin Pan

Inventor： Jung-Lin Pan

IPC: H04B7/216

CPC classification number: H04B1/70757 ,  H04B1/707 ,  H04B1/7115 ,  H04B2201/70707 ,  H04L25/03038 ,  H04L2025/03375 ,  H04L2025/03477 ,  H04L2025/03617

Abstract: A method and apparatus for reducing the processing rate when performing chip-level equalization (CLE) in a code division multiple access (CDMA) receiver which includes an equalizer filter. Signals received by at least one antenna of the receiver are sampled at M times the chip rate. Each sample stream is split into M sample data streams at the chip rate. Multipath combining is preferably performed on each split sample data stream. The sample data streams are then combined into one combined sample data stream at the chip rate. The equalizer filter performs equalization on the combined sample stream at the chip rate. Filter coefficients are adjusted by adding a correction term to the filter coefficients utilized by the equalizer filter for a previous iteration.

Abstract translation: 一种用于在包括均衡器滤波器的码分多址（CDMA）接收机中执行码片级均衡（CLE）时降低处理速率的方法和装置。 由接收机的至少一个天线接收的信号以芯片速率的M倍采样。 每个样本流以码片速率被分成M个采样数据流。 优选对每个分割样本数据流执行多路径组合。 然后将样本数据流以码片速率组合成一个组合的采样数据流。 均衡器滤波器以码片速率对组合的采样流进行均衡。 通过将校正项加到由均衡器滤波器用于先前迭代的滤波器系数来调整滤波器系数。

公开(公告)号：US20070247356A1

公开(公告)日：2007-10-25

申请号：US11406644

申请日：2006-04-19

Applicant: Chun-nan Chen

Inventor： Chun-nan Chen

IPC: G01S5/14 ,  H04B1/00

CPC classification number: G01S19/34 ,  G01S19/24 ,  G01S19/29 ,  G01S19/30 ,  G01S19/37 ,  H04B1/7075 ,  H04B2001/70706 ,  H04B2201/70707

Abstract: A satellite signal adjustable time-division multiplexing receiver for GNSS and a method for acquiring and tracking satellite signal used in the receiver. The present invention executes correlation in an adjustable time-division multiplexing and uses a clock signal with a clock rate to control speed of correlation. The clock rate can be fixed or variable. In the case that the clock rate is variable, when the speed is required to be fast (e.g. in satellite acquisition mode), the clock rate is set to be high clock rate; when the speed needs not be so fast (e.g. in signal tracking mode), the clock rate can be lower down to reduce power consumption. The adjustable time-division multiplexing is arranged for respective domains such as visible satellite, code phase, Doppler frequency and tracking accuracy according to the clock rate.

Abstract translation: 用于GNSS的卫星信号可调时分多路复用接收机以及用于获取和跟踪在接收机中使用的卫星信号的方法。 本发明在可调时分复用中执行相关性，并且使用具有时钟速率的时钟信号来控制相关速度。 时钟频率可以是固定的或可变的。 在时钟速率可变的情况下，当速度要求快时（例如在卫星采集模式中），时钟频率被设定为高时钟频率; 当速度不需要如此快速（例如在信号跟踪模式中）时，可以将时钟速率降低以降低功耗。 根据时钟频率，对可视卫星，码相位，多普勒频率和跟踪精度等各个域进行可调时分复用。