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公开(公告)号：US20080013494A1
公开(公告)日：2008-01-17
申请号：US11768863
申请日：2007-06-26
IPC分类号： H04Q7/00
CPC分类号： H04W52/36 , H04B1/707 , H04B2201/70706 , H04B2201/709709
摘要： The invention is a method for limiting the peak transmit power in a CDMA communication system. At least one of first and second high transmit power regions are separated into a plurality of high transmit power subregions. The high transmit power subregions of the plurality of high subregions are shifted by time offsets of differing durations to provide a plurality of time offset subregions. First and second low transmit power regions are also provided. At least one of the first and second low transmit power regions is also separated into a plurality of transmit power subregions and the low transmit power subregions are shifted by time offsets of differing time durations. The subregions can be time offset by a predetermined time duration or by a random time duration.
摘要翻译： 本发明是限制CDMA通信系统中的峰值发射功率的方法。 第一和第二高发射功率区域中的至少一个被分离成多个高发射功率子区域。 多个高次区域中的高发射功率子区域被不同持续时间的时间偏移移位以提供多个时间偏移子区域。 还提供了第一和第二低发射功率区域。 第一和第二低发射功率区域中的至少一个也被分离成多个发射功率子区域，并且低发射功率子区域被不同持续时间的时间偏移量偏移。 这些子区域可以被时间偏移预定的持续时间或随机的持续时间。
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2.发明授权Method and apparatus for reducing amplitude variations and interference in communication signals, such as in wireless communication signals employing inserted pilot symbols 有权用于减少通信信号中的振幅变化和干扰的方法和装置，例如在采用插入导频符号的无线通信信号中公开(公告)号：US06310869B1
公开(公告)日：2001-10-30
申请号：US09144402
申请日：1998-08-31
申请人： Jack Holtzman , Daisuke Terasawa , Leonid Razoumov
发明人： Jack Holtzman , Daisuke Terasawa , Leonid Razoumov
IPC分类号： H04J1300
CPC分类号： H04W52/04 , H04B1/707 , H04B1/7103 , H04B2201/70701 , H04B2201/70706 , H04J13/004 , H04J13/0048 , H04J13/12 , H04L27/2615 , H04L2025/03777
摘要： 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.
摘要翻译： 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平均幅度大的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。
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3.发明授权Method and system for handoff between an asychronous CDMA base station and a synchronous CDMA base station 失效异步CDMA基站与同步CDMA基站之间切换的方法和系统公开(公告)号：US06982971B2
公开(公告)日：2006-01-03
申请号：US09809896
申请日：2001-03-15
申请人： Edward G. Tiedemann, Jr. , Daisuke Terasawa , Sandip Sarkar , Yu-Cheun Jou , Joseph P. Odenwalder
发明人： Edward G. Tiedemann, Jr. , Daisuke Terasawa , Sandip Sarkar , Yu-Cheun Jou , Joseph P. Odenwalder
IPC分类号： H04Q7/00
CPC分类号： H04W36/0094 , H04B1/70735 , H04J3/0638 , H04J3/0682 , H04W56/0015 , H04W56/0055
摘要： A method and system that enables faster acquisition of the forward link signal of a target base station in a mixed network of synchronous and asynchronous base stations is disclosed. The serving base station transmits in a neighbor list an estimated timing error 417 between the serving base station and a target base station. By utilizing the timing information, a mobile station estimates the relative time offset 408 between forward link signals received from the serving base station and signals received from the target base station. Timing information acquired during handoff enables accurate updating of the estimated timing error 417 subsequently transmitted in the neighbor lists by the base stations.
摘要翻译： 公开了一种能够更快地获取同步和异步基站的混合网络中的目标基站的前向链路信号的方法和系统。 服务基站在邻居列表中发送服务基站和目标基站之间的估计定时错误417。 通过利用定时信息，移动台估计从服务基站接收的前向链路信号与从目标基站接收的信号之间的相对时间偏移408。 在切换期间获取的定时信息使得能够准确地更新基站随后在邻居列表中发送的估计定时误差417。
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4.发明授权Method for handoff between an asynchronous CDMA base station and a synchronous CDMA base station 失效异步CDMA基站与同步CDMA基站之间切换的方法公开(公告)号：US06724739B1
公开(公告)日：2004-04-20
申请号：US09515041
申请日：2000-02-25
IPC分类号： H04Q700
CPC分类号： H04B1/7075 , H04B2201/70701 , H04W36/0083 , H04W36/14
摘要： An improved method for facilitating handoff between an asynchronous and a synchronous base station. A method for determining a pilot channel PN offset of a pilot channel transmitted by a wireless base station. In a first embodiment, the method includes correlating a PN sequence with a received pilot signal to acquire a PN frame timing, receiving at least one search code burst aligned with the PN frame timing, the at least one search code burst signifying the pilot channel PN offset, and comparing the at least one search code burst to a set of codewords, each codeword representing a predetermined PN offset. From the search code bursts, the mobile station is able to quickly determine the PN offset of the transmitting base station, and thereby identify it. Methods for transmitting a complementary set of forward link channels are also disclosed.
摘要翻译： 一种用于促进异步和同步基站之间切换的改进方法。 一种用于确定由无线基站发送的导频信道的导频信道PN偏移的方法。 在第一实施例中，该方法包括将PN序列与接收到的导频信号相关联以获取PN帧定时，接收与PN帧定时对准的至少一个搜索码突发，表示导频信道PN的至少一个搜索码突发 偏移，并且将所述至少一个搜索码突发与一组码字进行比较，每个码字表示预定的PN偏移。 从搜索码突发中，移动站能够快速地确定发射基站的PN偏移，从而识别它。 还公开了用于发送互补的一组前向链路信道的方法。
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公开(公告)号：US07254118B1
公开(公告)日：2007-08-07
申请号：US09576063
申请日：2000-05-22
IPC分类号： H04Q7/00
CPC分类号： H04W56/0065 , H04B7/2668 , H04W24/08 , H04W36/18 , H04W56/001
摘要： A novel and improved method and apparatus, in a WCDMA communication system (100), for informing a mobile station (101) of a downlink data frame time offset by determining the downlink data frame time offset, and transmitting the downlink data frame time offset via an Active Set Update message transmitted from a cell (102 or 103) to mobile station (101). Once an Active Set Update message is received, the data frame time offset information is provided to a timing block (201) which may determine data frame boundary of each downlink signal. Timing block (201) may then adjust the PN sequence timing corresponding to the downlink signal associated with the data frame time offset such that corresponding data symbols in each data frame are correctly soft combined in a combiner (210).
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公开(公告)号：US07082109B2
公开(公告)日：2006-07-25
申请号：US10093685
申请日：2002-03-07
IPC分类号： G08C17/00
CPC分类号： H04W52/36 , H04B1/707 , H04B2201/70706 , H04B2201/709709
摘要： The invention is a method for limiting the peak transmit power in a CDMA communication system. At least one of first and second high transmit power regions are separated into a plurality of high transmit power subregions. The high transmit power subregions of the plurality of high subregions are shifted by time offsets of differing durations to provide a plurality of time offset subregions. First and second low transmit power regions are also provided. At least one of the first and second low transmit power regions is also separated into a plurality of transmit power subregions and the low transmit power subregions are shifted by time offsets of differing time durations. The subregions can be time offset by a predetermined time duration or by a random time duration.
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7.发明授权Data buffer structure for asynchronously received physical channels in a CDMA system 有权用于在CDMA系统中异步接收的物理信道的数据缓冲器结构公开(公告)号：US06624767B1
公开(公告)日：2003-09-23
申请号：US09655666
申请日：2000-09-06
申请人： Da-Shan Shiu , Avneesh Agrawal , Daisuke Terasawa
发明人： Da-Shan Shiu , Avneesh Agrawal , Daisuke Terasawa
IPC分类号： H03M700
CPC分类号： H03M13/271 , H04B1/707
摘要： A receiver unit for use in a CDMA system and including a channel processor, a buffer, and a data processor. The channel processor processes samples for one or more physical channels for each time interval to provide symbols. The buffer is operated as a number of memory banks. Each memory bank is associated with a respective time interval and stores symbols associated with that time interval. The data processor retrieves symbols for a particular “traffic” from one or more memory banks and processes the retrieved symbols. For the W-CDMA system, each traffic includes one or more radio frames for a particular transmission time interval. The receiver unit typically further includes a controller that directs the storage and retrieval of symbols to and from the memory banks and a decoder that decodes symbols processed by the data processor. For each time interval, radio frames for physical channels received starting within that time interval can be stored to permutated locations of designated sections of the memory bank. 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.
摘要翻译： 一种用于CDMA系统并包括信道处理器，缓冲器和数据处理器的接收器单元。 信道处理器针对每个时间间隔处理一个或多个物理信道的采样以提供符号。 缓冲器作为多个存储体操作。 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。 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。 接收器单元通常还包括一个控制器，其指示将符号存储和检索到存储器组和从存储体中解码，以及解码器，其对由数据处理器处理的符号进行解码。 对于每个时间间隔，在该时间间隔内开始接收的物理信道的无线电帧可被存储到存储体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。
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公开(公告)号：US06456606B1
公开(公告)日：2002-09-24
申请号：US09275524
申请日：1999-03-24
申请人： Daisuke Terasawa
发明人： Daisuke Terasawa
IPC分类号： H04B7216
摘要： In a CDMA system in which the base stations are not each time aligned with one another, the handoff process accommodates the handoff by allowing for frame alignment. For example, frame alignment may be accomplished through the use of a selected set or may be remote unit aligned without reference to external sources. In addition, the neighbor list may included additional entries.
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公开(公告)号：US08331330B2
公开(公告)日：2012-12-11
申请号：US12763646
申请日：2010-04-20
IPC分类号： H04B7/216
CPC分类号： H04B1/70735 , H04B2201/70707 , H04B2201/7071
摘要： Techniques for efficient searching in asynchronous systems, such as W-CDMA, as well as multi-mode searching, are disclosed. In one aspect, step one and step three search are performed in a single search engine. In another aspect, a search engine is configurable to search the offsets of a slot in step one search, producing sequential hypothesis energies, and peak detecting and sorting those energies. In yet another aspect, the peak detector and sorter are configurable to perform step one searching or step three/multimode searching. 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.
摘要翻译： 公开了用于在诸如W-CDMA的异步系统中进行有效搜索的技术以及多模式搜索。 在一个方面，在单个搜索引擎中执行步骤1和步骤3搜索。 在另一方面，搜索引擎可配置为在步骤一搜索中搜索时隙的偏移量，产生顺序假设能量，以及峰值检测和排序这些能量。 在另一方面，峰值检测器和分类器可配置为执行步骤一搜索或步骤三/多模式搜索。 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。
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公开(公告)号：US07965688B2
公开(公告)日：2011-06-21
申请号：US11768863
申请日：2007-06-26
IPC分类号： H04B7/215
CPC分类号： H04W52/36 , H04B1/707 , H04B2201/70706 , H04B2201/709709
摘要： The invention is a method for limiting the peak transmit power in a CDMA communication system. At least one of first and second high transmit power regions are separated into a plurality of high transmit power subregions. The high transmit power subregions of the plurality of high subregions are shifted by time offsets of differing durations to provide a plurality of time offset subregions. First and second low transmit power regions are also provided. At least one of the first and second low transmit power regions is also separated into a plurality of transmit power subregions and the low transmit power subregions are shifted by time offsets of differing time durations. The subregions can be time offset by a predetermined time duration or by a random time duration.
摘要翻译： 本发明是限制CDMA通信系统中的峰值发射功率的方法。 第一和第二高发射功率区域中的至少一个被分离成多个高发射功率子区域。 多个高次区域中的高发射功率子区域被不同持续时间的时间偏移移位以提供多个时间偏移子区域。 还提供了第一和第二低发射功率区域。 第一和第二低发射功率区域中的至少一个也被分离成多个发射功率子区域，并且低发射功率子区域被不同时间持续时间的时间偏移量偏移。 这些子区域可以被时间偏移预定的持续时间或随机的持续时间。
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