公开(公告)号：US20090129443A1

公开(公告)日：2009-05-21

申请号：US11922868

申请日：2006-06-26

申请人： Toshinori Suzuki

发明人： Toshinori Suzuki

IPC分类号： H04B1/00

CPC分类号： H04L5/0021 ,  H04B7/12 ,  H04J11/0026 ,  H04J13/12 ,  H04L5/0044 ,  H04L25/0204 ,  H04L25/022 ,  H04L2025/03414

摘要： A transmitter (1) comprises a spreading code generating part (11) that uses the set values of adjacent parameters to generate spreading codes from a row or column vector in a spreading code matrix comprising trigonometric functions the arguments of which are the adjustment parameters; and a signal multiplexing part (12) that performs spread and multiplex processes of information using the spreading codes. The transmitter (1) arranges the signals, which have been subjected to the spread and multiplex processes, onto a plurality of subchannels for transmission.

摘要翻译： 发射机（1）包括扩展码产生部分（11），其使用相邻参数的设置值从扩展码矩阵中的行或列向量生成扩展码，所述扩展码矩阵包括其参数是调整参数的三角函数; 以及信号复用部分（12），其使用扩展码执行信息的扩展和多路复用处理。 发射机（1）将已经经过扩频和多路复用处理的信号排列在多个子信道上进行传输。

公开(公告)号：US20090110033A1

公开(公告)日：2009-04-30

申请号：US12328917

申请日：2008-12-05

申请人： Steve Shattil

发明人： Steve Shattil

IPC分类号： H04B1/00

CPC分类号： H04L1/04 ,  H04B1/7174 ,  H04B7/0697 ,  H04B7/12 ,  H04J13/0077 ,  H04J14/02 ,  H04J14/0298 ,  H04L5/0021 ,  H04L27/2637 ,  H04L27/2697

摘要： Carrier Interferometry (CI) provides wideband transmission protocols with frequency-band selectivity to improve interference rejection, reduce multipath fading, and enable operation across non-continuous frequency bands. Direct-sequence protocols, such as DS-CDMA, are provided with CI to greatly improve performance and reduce transceiver complexity. CI introduces families of orthogonal polyphase codes that can be used for channel coding, spreading, and/or multiple access. Unlike conventional DS-CDMA, CI coding is not necessary for energy spreading because a set of CI carriers has an inherently wide aggregate bandwidth. Instead, CI codes are used for channelization, energy smoothing in the frequency domain, and interference suppression. CI-based ultra-wideband protocols are implemented via frequency-domain processing to reduce synchronization problems, transceiver complexity, and poor multipath performance of conventional ultra-wideband systems. CI allows wideband protocols to be implemented with space-frequency processing and other array-processing techniques to provide either or both diversity combining and sub-space processing. CI also enables spatial processing without antenna arrays. Even the bandwidth efficiency of multicarrier protocols is greatly enhanced with CI. CI-based wavelets avoid time and frequency resolution trade-offs associated with conventional wavelet processing. CI-based Fourier transforms eliminate all multiplications, which greatly simplifies multi-frequency processing. The quantum-wave principles of CI improve all types of baseband and radio processing.

摘要翻译： 载波干涉测量（CI）提供具有频带选择性的宽带传输协议，以改善干扰抑制，减少多径衰落，并使能跨非连续频带的操作。 直接序列协议（如DS-CDMA）与CI一起提供，以大大提高性能并降低收发器的复杂性。 CI引入了可用于信道编码，扩展和/或多次访问的正交多相代码的族。 与常规DS-CDMA不同，CI编码对于能量扩展不是必需的，因为一组CI载波具有固有的宽的聚合带宽。 相反，CI码用于信道化，频域中的能量平滑和干扰抑制。 基于CI的超宽带协议通过频域处理实现，以减少传统超宽带系统的同步问题，收发器复杂度和差的多径性能。 CI允许使用空间频率处理和其他阵列处理技术来实现宽带协议，以提供分集组合和子空间处理中的一个或两者。 CI还支持无天线阵列的空间处理。 CI可以大大提高多载波协议的带宽效率。 基于CI的小波避免了与常规小波处理相关的时间和频率分辨率权衡。 基于CI的傅里叶变换消除了所有的乘法，这大大简化了多频处理。 CI的量子波原理改进了所有类型的基带和无线电处理。

公开(公告)号：US07508790B2

公开(公告)日：2009-03-24

申请号：US10879854

申请日：2004-06-28

申请人： Yu-Cheun Jou

发明人： Yu-Cheun Jou

IPC分类号： H04B7/216 ,  H04J1/08

CPC分类号： H04L5/005 ,  H04L5/0021 ,  H04L5/0053 ,  H04L5/0064 ,  H04L27/262 ,  H04L27/2657

摘要： A method and apparatus for transmitting broadcast information in a multi-carrier communication system. The Sync Channel of the multi-carrier system is transmitted a 1.25 MHz channel bandwidth (i.e., over a single carrier), and to specify the preferred channels for the Sync Channel transmission instead of the preferred channels for the entire multi-carrier system. The Sync Channel Message will carry additional information indicating the center frequency of a multi-carrier system within a reserved set of frequency bands and indicating the frequency of a single carrier system in the reserved set of frequency bands. Considering the A block of the PCS band again, the preferred channels for Sync Channel transmission can be selected as channels 75, 150 and 225. This selection ensures that one of the preferred channels will always be used by any multi-carrier system regardless of the location of its center channel.

公开(公告)号：US20090041092A1

公开(公告)日：2009-02-12

申请号：US11996284

申请日：2006-07-20

申请人： Hak Seong KIM ,  Bong Hoe Kim ,  Dong Wook Roh ,  Joon Kui Ahn ,  Dong Youn Seo ,  Jung Hoon Lee

发明人： Hak Seong KIM ,  Bong Hoe Kim ,  Dong Wook Roh ,  Joon Kui Ahn ,  Dong Youn Seo ,  Jung Hoon Lee

IPC分类号： H04B1/707 ,  H04L27/28 ,  H04L5/12

CPC分类号： H04L5/0037 ,  H04B1/707 ,  H04L5/0021 ,  H04L5/0046

摘要： A method of transmitting data in a multi-carrier communication system is disclosed. More specifically, the method includes mapping at least one data symbol to at least one subcarrier of a first frequency domain and at least one data symbol to at least one subcarrier of a second frequency domain, wherein the first frequency domain and the second frequency domain are mutually exclusive and the at least one data symbol mapped to the at least one subcarrier of the second frequency domain is multiplied by a spreading code, transforming the at least one data symbol mapped to the first frequency domain and the at least one data symbol mapped to the second frequency domain by an inverse discrete Fourier transform (IDFT) module, and transmitting the transformed data symbols to a receiving end.

摘要翻译： 公开了一种在多载波通信系统中发送数据的方法。 更具体地，该方法包括将至少一个数据符号映射到第一频域的至少一个子载波和至少一个数据符号至第二频域的至少一个子载波，其中第一频域和第二频域为 映射到第二频域的至少一个子载波的至少一个数据符号被乘以扩展码，变换映射到第一频域的至少一个数据符号和映射到第一频域的至少一个数据符号 通过逆离散傅里叶变换（IDFT）模块的第二频域，并将变换的数据符号发送到接收端。

公开(公告)号：US20090016412A1

公开(公告)日：2009-01-15

申请号：US11911309

申请日：2006-02-27

申请人： Naoki Okamoto

发明人： Naoki Okamoto

IPC分类号： H04B1/707

CPC分类号： H04J13/10 ,  H04L5/0021 ,  H04L5/0046 ,  H04L5/0048 ,  H04L5/006 ,  H04L27/2615

摘要： Interference of multiplexed signals is reduced in an MC-CDMA communication system.A wireless communication apparatus performing a wireless communication by combining a multicarrier transmission system with a spread spectrum includes: a rearrangement control part that ranks each subcarrier in accordance with a magnitude of received power based on received power information indicating received power of each subcarrier received from a communicating apparatus and groups subcarriers in descending or ascending order of the rank in accordance with a spreading factor; and a rearrangement part that distributes a spread code to each of the groups.

摘要翻译： 多路复用信号的干扰在MC-CDMA通信系统中减少。 通过组合具有扩展频谱的多载波传输系统来执行无线通信的无线通信装置包括：重新布置控制部，其根据接收到的功率信息，根据接收到的功率信息，根据从第 根据扩频因子按等级的降序或升序对子载波进行分组; 以及向每个组分配扩展码的重新排列部分。

公开(公告)号：US20080291820A1

公开(公告)日：2008-11-27

申请号：US12096874

申请日：2006-07-25

申请人： Hyung-Soo Lim ,  Yu-Ro Lee ,  Dong-Seung Kwon

发明人： Hyung-Soo Lim ,  Yu-Ro Lee ,  Dong-Seung Kwon

IPC分类号： H04J14/00 ,  H04J13/04

CPC分类号： H04L5/0021 ,  H04J13/0048 ,  H04J13/18 ,  H04L5/0007 ,  H04L5/0039 ,  H04L5/0064 ,  H04L5/0073

摘要： The present invention relates to a method for allocating a frequency domain spread code in a base station of a multi-carrier code division multiple access (MC-CDMA) communication system. A code allocation priority is established based on interference between previously allocated spread codes and a newly allocated spread code so as to minimize the interference caused by channel fading or a synchronization error according to a transmitting or receiving timing offset when a scheduler of the base station in the MC-CDMA communication system allocates a subcarrier group to the plurality of user terminals or channels, and the spread code is allocated to the plurality of user terminals or channels according to the established priority, by the scheduler of the base station.

摘要翻译： 本发明涉及一种在多载波码分多址（MC-CDMA）通信系统的基站中分配频域扩频码的方法。 基于先前分配的扩展码和新分配的扩展码之间的干扰建立码分配优先级，以便当基站的调度器处于发送或接收定时偏移时，根据发送或接收定时偏移最小化由信道衰落或同步误差引起的干扰 MC-CDMA通信系统向多个用户终端或信道分配子载波组，并且由基站的调度器根据建立的优先级将扩频码分配给多个用户终端或信道。

公开(公告)号：US20080212693A1

公开(公告)日：2008-09-04

申请号：US11597587

申请日：2005-05-20

申请人： Charles Razzell

发明人： Charles Razzell

IPC分类号： H04L27/28

CPC分类号： H04L27/2602 ,  H04B1/692 ,  H04B1/707 ,  H04L5/0021 ,  H04L5/0048 ,  H04L5/0064 ,  H04L25/0224 ,  H04L25/03159 ,  H04L27/2607 ,  H04L2025/03414

摘要： A method and apparatus for transmitting and receiving high-bandwidth OFDM signals, while limiting the complexity of the OFDM signal processing is described. Bandwidth expansion is achieved by repetition of whole OFDM symbols with the polarity of repetitions determined by a long PN code. This technique ensures a perfectly white spectrum. Use of zero-suffix OFDM symbols allows a large tolerance to multipath channels, even while maintaining a single, low-rate RAKE finger for despreading in the receiver.

摘要翻译： 描述了在限制OFDM信号处理的复杂度的同时发送和接收高带宽OFDM信号的方法和装置。 带宽扩展通过重复整个OFDM符号来实现，具有由长PN码确定的重复极性。 这种技术确保了完美的白光谱。 使用零后缀OFDM符号允许对多径信道的大容限，即使在维持单个低速RAKE手指以在接收机中进行解扩。

公开(公告)号：US20080058975A1

公开(公告)日：2008-03-06

申请号：US11819921

申请日：2007-06-29

申请人： Samuli Visuri ,  Bernd Bandemer

发明人： Samuli Visuri ,  Bernd Bandemer

IPC分类号： G06F19/00

CPC分类号： H04L25/0252 ,  H04L5/0007 ,  H04L5/0021 ,  H04L5/0023 ,  H04L5/006 ,  H04L5/0075 ,  H04L25/0204 ,  H04L25/0242

摘要： There is provided a base station comprising: an estimation unit for estimating a second or higher order statistics for each user terminal in a set of user terminals to be served; an estimation unit for estimating a scheduling metric based on the estimated second or higher order statistics; and a scheduling unit for controlling scheduling based on the estimated scheduling metric.

摘要翻译： 提供了一种基站，包括：估计单元，用于估计要服务的一组用户终端中的每个用户终端的第二或更高阶统计; 估计单元，用于基于估计的第二或更高阶统计量来估计调度度量; 以及调度单元，用于基于估计的调度度量来控制调度。

公开(公告)号：US07336600B2

公开(公告)日：2008-02-26

申请号：US10748550

申请日：2003-12-29

申请人： Chih-Chun Feng ,  Yung-Hua Hung ,  Chun-Hung Liu

发明人： Chih-Chun Feng ,  Yung-Hua Hung ,  Chun-Hung Liu

IPC分类号： H04J11/00

CPC分类号： H04L27/2655 ,  H04J11/0069 ,  H04L5/0021 ,  H04L27/2613 ,  H04L27/2656 ,  H04L27/2662

摘要： A method for synchronizing and identifying the cell code (scrambling code) of a cell in an orthogonal frequency division multiplexing (OFDM) based cellular communication system is provided. In this method, desired cell is found by utilizing a frame structure of OFDM symbols and through a corresponding cell search procedure, where the frame structure has periodic signal pattern and contains the information about the cell code of the desired cell in common pilot channel (CPICH) signal. And, the cell search method utilizes the periodic property of the frame structure to detect frame timing, and the correlation property of CPICH signal to identify the cell code. The cell search method of the present invention offers the advantages of good link quality, fast acquisition, and low power consumption.

摘要翻译： 提供了一种在基于正交频分复用（OFDM）的蜂窝通信系统中同步和识别小区的小区码（扰码）的方法。 在该方法中，通过利用OFDM符号的帧结构并通过相应的小区搜索过程找到所需小区，其中帧结构具有周期性信号模式，并且在公共导频信道（CPICH）中包含关于期望小区的小区码的信息 ）信号。 并且，小区搜索方法利用帧结构的周期属性来检测帧定时，以及CPICH信号的相关性以识别小区码。 本发明的小区搜索方法具有良好的链路质量，快速采集和低功耗的优点。

公开(公告)号：US20080025255A1

公开(公告)日：2008-01-31

申请号：US11492566

申请日：2006-07-25

申请人： Deepshikha Garg ,  Radhakrishna Canchi

发明人： Deepshikha Garg ,  Radhakrishna Canchi

IPC分类号： H04Q7/00

CPC分类号： H04L27/2608 ,  H04L5/0021 ,  H04L5/0064 ,  H04L5/023

摘要： Disclosed is a wireless communications system having multiple communication channel types in a multi-carrier system. The different channel types, which correspond to different data rates, are allocated depending on the type of session being initialized (its data rate requirements). This is accomplished using different orthogonal code lengths with different carriers and their subcarriers. An orthogonal code length is assigned to a carrier and used with its subcarriers to create a set of assignable channels having differing data rates. The association between a carrier and an orthogonal code length can be dynamically reassigned depending on the needs of active sessions.

摘要翻译： 公开了一种在多载波系统中具有多个通信信道类型的无线通信系统。 根据正在初始化的会话的类型（其数据速率要求）分配与不同数据速率相对应的不同信道类型。 这是使用具有不同载波及其子载波的不同正交码长度完成的。 将正交码长度分配给载波并与其子载波一起使用以创建具有不同数据速率的一组可分配信道。 可以根据活动会话的需要来动态地重新分配载波和正交码长度之间的关联。