公开(公告)号：NO20010828D0

公开(公告)日：2001-02-19

申请号：NO20010828

申请日：2001-02-19

Applicant: QUALCOMM INC

Inventor： LUNDBY STEIN A ,  HOLTZMAN JACK M ,  TIEDEMANN JR EDWARD G ,  TERASAWA DAISUKE

IPC: H04B1/707 ,  H04B1/7097 ,  H04B7/005 ,  H04B

Abstract: A method for limiting peak transmit power in a CDMA communication system by transmitting a first communication signal having a first high transmit power region, and transmitting a second communication signal having a second high transmit power region. A first and a second communication signal are time offset to prevent the first and second high transmit power regions from occurring simultaneously. Time shifting only a portion of the first and second communication signals is also taught. The first and second communication signals can also include respective first and second low transmit power regions. The time offset can be selected to align one of the first and second high transmit power regions with one of the first and second low transmit power regions. The total transmit power signal can be determined and the time offset can be selected to minimize a peak level of the total transmit power signal. The communication signals are separated into a plurality of portions and portions of the first and second communication signals are time offset to re-order the sequence of transmission of the plurality of portions.

公开(公告)号：AU5696999A

公开(公告)日：2000-03-21

申请号：AU5696999

申请日：1999-08-30

Applicant: QUALCOMM INC

Inventor： LUNDBY STEIN A ,  TIEDEMANN EDWARD G JR ,  HOLTZMAN JACK ,  TERASAWA DAISUKE

IPC: H04B1/707 ,  H04W52/00 ,  H04W52/36 ,  H04B7/26

Abstract: A first signal (74a) and a second signal (74b) are time-offset by a period to. Careful selection of the period to allows the peak-to-average transmit power ratio to be reduced.

公开(公告)号：CA2340942A1

公开(公告)日：2000-03-02

申请号：CA2340942

申请日：1999-08-17

Applicant: QUALCOMM INC

Inventor： LUNDBY STEIN A ,  TERASAWA DAISUKE ,  HOLTZMAN JACK M ,  TIEDEMANN EDWARD G JR

IPC: H04B1/707 ,  H04B1/7097 ,  H04B7/005 ,  H04L27/26

Abstract: A method for limiting peak transmit power in a CDMA communication system by transmitting a first communication signal having a first high transmit power region, and transmitting a second communication signal having a second high transmit power region. A first and a second communication signal are time offset to prevent the first and second high transmit power regions from occurring simultaneously. Time shifting only a portion of the first and seco nd communication signals is also taught. The first and second communication signals can also include respective first and second low transmit power regions. The time offset can be selected to align one of the first and secon d high transmit power regions with one of the first and second low transmit power regions. The total transmit power signal can be determined and the tim e offset can be selected to minimize a peak level of the total transmit power signal.

公开(公告)号：WO0221729A3

公开(公告)日：2002-06-13

申请号：PCT/US0127626

申请日：2001-09-05

Applicant: QUALCOMM INC

Inventor： AGRAWAL AVNEESH ,  TERASAWA DAISUKE

IPC: H04J13/20 ,  H04B1/7117 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04Q7/38 ,  H04B1/707

CPC classification number: H04J13/0044 ,  H04B7/2628 ,  H04B2201/70705 ,  H04B2201/709709

Abstract: Techniques for recovering data transmitted on a physical channel in which channelization code is not known at the time of the data recovery. A modulated signal is received and processed to provide received samples (612). A hypothesized channelization code (e.g., an OVSF code in the W-CDMA system) is selected (616) and used to process the received samples to generate partially processed symbols (618). The hypothesized channelization code is a "base" code that can be used to generate all possible channelization codes that may have been used for the physical channel. Intermediate results representative of the partially processed symbols are stored (622) and, upon determination of the actual channelization code (624), further processed (626) in accordance with the actual and hypothesized channelization codes to provide the final results. The additional processing includes partitioning the intermediate results into sets, scaling each intermediate result in a particular set with a scaling factor (+1 or 1) determined by the actual and hypothesized channelization codes, and combining the scaled results in each set to obtain a final result. In the STTD mode in the W-CDMA system, the final results from multiple actual OVSF code intervals can be selectively combine to obtain a recovered symbol (628).

Abstract translation: 用于恢复在数据恢复时信道化代码未知的物理信道上传输的数据的技术。 接收并处理调制信号以提供接收采样（612）。 假定的信道化码（例如，W-CDMA系统中的OVSF码）被选择（616）并用于处理所接收的采样以生成部分处理的码元（618）。 假设的信道化码是一个“基本”码，可用于生成所有可能用于物理信道的可能的信道化码。 代表部分处理的符号的中间结果被存储（622），并且在确定实际信道化代码（624）时，根据实际的和假设的信道化代码进一步处理（626）以提供最终结果。 附加处理包括将中间结果划分成集合，用由实际和假定信道化码确定的缩放因子（+1或1）将每个中间结果缩放到特定集合中，并组合每个集合中的缩放结果以获得最终 结果。 在W-CDMA系统中的STTD模式中，来自多个实际OVSF码间隔的最终结果可以被选择性地组合以获得恢复符号（628）。

公开(公告)号：WO0221715A3

公开(公告)日：2002-05-30

申请号：PCT/US0126945

申请日：2001-08-28

Applicant: QUALCOMM INC

Inventor： SHIU DA-SHAN ,  AGRAWAL AVNEESH ,  TERASAWA DAISUKE

IPC: H03M13/27 ,  H04B1/707

CPC classification number: H03M13/271 ,  H04B1/707

Abstract: A receiver unit (136) for use in a CDMA system and including a channel processor (810), a buffer (512), and a data processor (516). The channel processor (510) processes samples for one or more physical channels for each time interval to provide symbols (612). The buffer is operated as a number of memory banks (FIG. 3). Each memory bank is associated with a respective time interval and stores symbols associated with that time interval, The data processor (516) retrieves symbols for a particular "traffic" from one or more memory banks and processes the retrieved symbols (622, 624). For the W-CDMA system, each traffic includes one or more radio frames for a particular transmission time interval. The receiver unit (136) typically further includes a controller (520) that directs the storage and retrieval of symbols (614) to and from the memory banks and a decoder (518) that decodes (624) symbols processed by the data processor. For each time interval, radio frames for physical channels received starting within that time interval can be stored (614) to permutated locations of designated sections of the memory bank (FIG. 7). Radio frames associated with a particular CCTrCH can be stored to contiguous sections of the memory bank. Symbols for a particular traffic can be retrieved from one or more memory banks in permutated order.

Abstract translation: 一种用于CDMA系统并包括信道处理器（810），缓冲器（512）和数据处理器（516）的接收机单元（136）。 信道处理器（510）针对每个时间间隔处理一个或多个物理信道的样本以提供符号（612）。 缓冲器作为多个存储体（图3）操作。 每个存储体与相应的时间间隔相关联并且存储与该时间间隔相关联的符号。数据处理器（516）从一个或多个存储体检索特定“流量”的符号并处理所检索的符号（622,624）。 对于W-CDMA系统，每个业务包括用于特定传输时间间隔的一个或多个无线电帧。 接收机单元（136）通常进一步包括控制器（520），其将存储和存储符号（614）的存储和检索引导到存储体和从解码器（518）解码器（518），解码器（624）由数据处理器处理的符号（624）。 对于每个时间间隔，可以将在该时间间隔内开始的物理信道的无线电帧存储（614）到存储体（图7）的指定部分的排列位置。 与特定CCTrCH相关联的无线帧可以存储到存储体的相邻部分。 可以根据排列顺序从一个或多个存储体检索特定业务的符号。

公开(公告)号：WO2004021585A3

公开(公告)日：2004-06-03

申请号：PCT/US0327269

申请日：2003-08-29

Applicant: QUALCOMM INC

Inventor： SENDONARIS ANDREW ,  SHIU DA-SHAN ,  PATTERSON DAVID M ,  SUBRAHMANYA PARVATHANATHAN ,  TERASAWA DAISUKE

IPC: H04J13/00 ,  H04Q7/38 ,  H04B1/707

CPC classification number: H04B1/70754

Abstract: A method and apparatus for using information about a mobile terminal's location relative to a base station can improve performance of a communication system. In addition, information about the mobile terminal's velocity relative to the base station may be used to improve performance of the communication system. The location information may be used to estimate a nominal PN offset, and a set of PN offset to use, for processing communication signals. The velocity information may be used to estimate a nominal frequency of the communication signals.

Abstract translation: 使用关于移动终端相对于基站的位置的信息的方法和装置可以提高通信系统的性能。 另外，可以使用关于移动终端相对于基站的速度的信息来改善通信系统的性能。 可以使用位置信息来估计用于处理通信信号的标称PN偏移和要使用的一组PN偏移。 速度信息可以用于估计通信信号的标称频率。

公开(公告)号：WO03026147A3

公开(公告)日：2003-06-19

申请号：PCT/US0230001

申请日：2002-09-19

Applicant: QUALCOMM INC

Inventor： RAO SUBRAMANYA P ,  VENKATESAN SIVARAMA ,  GHO GWANG-HYUN ,  AGRAWAL AVNEESH ,  TERASAWA DAISUKE

IPC: H04B1/7073 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/7083 ,  H04B1/709 ,  H04B1/7093 ,  H04Q7/38 ,  H04B1/707 ,  H04B7/26

CPC classification number: H04B1/7077 ,  H04B1/70735 ,  H04B1/70752 ,  H04B1/7083 ,  H04B1/709 ,  H04B1/7093 ,  H04B2201/70701 ,  H04B2201/70707

Abstract: Techniques for searching in asynchronous systems are disclosed. In one aspect, a plurality of codes, such as SSCs, are correlated with a received signal at a plurality of offsets to produce a code/slot energy corresponding to each code/slot boundary pair. Unique subsets of the code/slot energies are summed to produce code sequence energies, the maximum of which indicates a located code sequence and slot boundary. In another aspect, the correlation is performed by sub-correlating the received signal with a common sequence, and performing a Fast Hadamard Transform FHT on the results. In yet another aspect, one sub-correlator can be used to search a plurality of peaks simultaneously. Various other aspects of the invention are also presented. These aspects collectively 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: 公开了在异步系统中搜索的技术。 在一个方面，诸如SSC的多个代码与多个偏移处的接收信号相关，以产生对应于每个代码/时隙边界对的代码/时隙能量。 代码/时隙能量的独特子集被相加以产生代码序列能量，其最大值表示定位的代码序列和时隙边界。 在另一方面，通过将接收到的信号与公共序列进行子相关并且对结果执行快速Hadamard变换FHT来执行相关性。 在另一方面，可以使用一个子相关器同时搜索多个峰值。 还提出了本发明的各种其它方面。 这些方面共同具有电路面积和搜索时间效率的优点，其转化为降低的成本，增加的待机时间，增加的采集速度，更高质量的信号传输，增加的数据吞吐量，降低的功率以及改善的整体系统容量。

公开(公告)号：WO0013337A3

公开(公告)日：2000-06-08

申请号：PCT/US9919734

申请日：1999-08-30

Applicant: QUALCOMM INC

Inventor： HOLTZMAN JACK ,  TERASAWA DAISUKE ,  RAZOUMOV LEONID

IPC: H04B1/707 ,  H04B1/7103 ,  H04B7/005 ,  H04B7/26 ,  H04J11/00 ,  H04J13/00 ,  H04J13/12 ,  H04L25/03 ,  H04L27/26 ,  H04W52/04

CPC classification number: H04W52/04 ,  H04B1/707 ,  H04B1/7103 ,  H04B2201/70701 ,  H04B2201/70706 ,  H04J13/004 ,  H04J13/0048 ,  H04J13/12 ,  H04L27/2615 ,  H04L2025/03777

Abstract: Several methods and corresponding apparatus reduce peak to average power in signals transmitted in a wireless communications system, particularly with respect to pilot symbols transmitted from a base station to several user stations. A large peak to average amplitude of inserted pilot symbols has been found to result from a common sign chip position that exists in orthogonal codes, such as Walsh codes. In a first embodiment, the Walsh codes are multiplied by a random value of +/- 1. Under a second embodiment, the common sign chip position is eliminated in each Walsh code. The user station then inserts the missing chip position to regain orthogonality. In a third embodiment, the base station transmits pilot symbols, on a separate pilot channel, in only symbol positions that user stations expect to find pilot symbols. Under a fourth embodiment, each Walsh code is randomly shifted.

Abstract translation: 几种方法和相应的装置减少了在无线通信系统中发送的信号中的峰均功率，特别是关于从基站发送到若干用户站的导频符号。 已经发现插入的导频符号的峰值到峰值的平均幅度是由诸如沃尔什码之类的正交码中存在的公共符号码片位置产生的。 在第一实施例中，沃尔什码乘以+/- 1的随机值。在第二实施例中，在每个沃尔什码中消除了共用码片位置。 然后用户站插入丢失的芯片位置以重新获得正交性。 在第三实施例中，基站在单独的导频信道上仅发送用户站希望找到导频符号的符号位置的导频符号。 在第四实施例中，每个沃尔什码随机移位。