公开(公告)号：US5991330A

公开(公告)日：1999-11-23

申请号：US884002

申请日：1997-06-27

申请人： Erik Dahlman ,  Maria Gustafsson ,  Riaz Esmailzadeh

发明人： Erik Dahlman ,  Maria Gustafsson ,  Riaz Esmailzadeh

IPC分类号： H04B1/7073 ,  H04B1/7075 ,  H04L7/00 ,  H04Q7/38 ,  H04B15/00

CPC分类号： H04B1/70752 ,  H04B1/70735 ,  H04B2201/70701

摘要： Each frame of a pilot channel transmission in a spread spectrum communications system is divided into a plurality of synchronization slots. Each of the synchronization slots includes a pilot code, and at least one of the synchronization slots further includes a framing synchronization code. To extract frame and slot synchronization information from the pilot channel transmission, pilot code timing is first identified by applying a matched filter or correlation to a received pilot signal, identifying peaks, and using the peaks to find a timing reference indicative of synchronization slot boundaries. Next, the set of known framing synchronization codes are correlated with the received signal over the included found synchronization slots. Given that the location within the frame of the known framing synchronization code(s) is known, once a correlation match is found at a certain slot location, the boundary of the frame (i.e., the frame synchronization) relative thereto is then also known.

摘要翻译： 扩频通信系统中的导频信道传输的每一帧被分成多个同步时隙。 每个同步时隙包括导频代码，并且至少一个同步时隙还包括成帧同步码。 为了从导频信道传输中提取帧和时隙同步信息，首先通过对接收到的导频信号应用匹配的滤波器或相关性来识别导频代码定时，识别峰值，并且使用该峰值找到指示同步时隙边界的定时参考。 接下来，已知的成帧同步码的集合通过所包含的已发现的同步时隙与接收的信号相关。 假定已知成帧同步码的帧内的位置是已知的，一旦在某个时隙位置处找到相关匹配，则帧的边界（即，帧同步）也是已知的。

公开(公告)号：US6163533A

公开(公告)日：2000-12-19

申请号：US847655

申请日：1997-04-30

申请人： Riaz Esmailzadeh ,  Maria Gustafsson

发明人： Riaz Esmailzadeh ,  Maria Gustafsson

IPC分类号： H04B7/26 ,  H04J13/00 ,  H04J13/10 ,  H04J13/16 ,  H04L12/56 ,  H04W72/04 ,  H04W74/08 ,  H04B7/216

CPC分类号： H04W74/004 ,  H04B2201/70701 ,  H04B2201/709709 ,  H04J13/0029 ,  H04J13/0033 ,  H04J13/107 ,  H04J13/16 ,  H04W28/06 ,  H04W72/0466 ,  H04W74/0833

摘要： A method, system, and apparatus assigns each sector in a cell a unique preamble spreading code and a unique long-code which is concatenated with a signature-associated short code to spread the data in the data field. The period selected for the long-code can be relatively long in duration (e.g., up to hours or days in length). The widths of the transmission time slots are set equal to the length of the preambles. Subsequent to the preamble period, the matched filter is still enabled to receive the preambles of other random access requests. Therefore, the matched filter can be utilized continuously and more efficiently. Additionally, the length of the data field is not restricted. The method of concatenated spreading of the data field portion of the random access packet allows a user to generate a packet which is as long as desired. Moreover, there is very little danger that the resulting packet will collide with other random access request packets.

摘要翻译： 一种方法，系统和装置将单元中的每个扇区分配唯一的前导码扩展码和独特的长码，其与签名相关联的短码连接以在数据字段中扩展数据。 为长码选择的期间可以在持续时间（例如长达数小时或数天）内相对较长。 传输时隙的宽度被设置为等于前导码的长度。 在前导码周期之后，匹配滤波器仍然能够接收其他随机接入请求的前同步码。 因此，可以连续且更有效地利用匹配滤波器。 另外，数据字段的长度不受限制。 随机接入分组的数据字段部分的级联扩展的方法允许用户生成与期望一样长的分组。 而且，所产生的分组与其他随机接入请求分组会发生冲突的危险性很小。

公开(公告)号：US20090005107A1

公开(公告)日：2009-01-01

申请号：US12198918

申请日：2008-08-27

申请人： Riaz Esmailzadeh ,  Takashi Yano ,  Nobukazu Doi

发明人： Riaz Esmailzadeh ,  Takashi Yano ,  Nobukazu Doi

IPC分类号： H04B7/00

CPC分类号： H04W52/24 ,  H04W52/362

摘要： A method and apparatus for controlling the power of a signal transmitted between a base station and a mobile terminal which constitute a mobile communication system. At least one of the base station and the mobile terminal has functions to compare a predetermined reference value and a necessary transmission power obtained as a result of transmission power control in order to compensate for a signal intensity fluctuation occurring on a link between the base station and the mobile terminal, temporarily stopping the transmission if the necessary transmission power is larger than a predetermined permissible value, and transmit the signal if the necessary transmission power is equal to or smaller than the predetermined permissible value.

摘要翻译： 一种用于控制在构成移动通信系统的基站和移动终端之间传输的信号的功率的方法和装置。 基站和移动终端中的至少一个具有将预定参考值和作为发送功率控制的结果获得的必要发送功率进行比较的功能，以便补偿基站与基站之间的链路上发生的信号强度波动 如果必要的发送功率大于预定的允许值，则暂时停止发送，并且如果必要的发送功率等于或小于预定的允许值则发送该信号。

公开(公告)号：US06961362B2

公开(公告)日：2005-11-01

申请号：US09892459

申请日：2001-06-28

申请人： Masayuki Ariyoshi ,  Riaz Esmailzadeh

发明人： Masayuki Ariyoshi ,  Riaz Esmailzadeh

IPC分类号： H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04J13/00 ,  H04W52/04 ,  H04W52/12 ,  H04B1/69

CPC分类号： H04W52/08 ,  H04B1/7107 ,  H04W52/12 ,  H04W52/20 ,  H04W52/24

摘要： The purpose of the present invention is to offer a structure of a CDMA system having a power control method and interference cancellers which can effectively increase the system capacity and is resistant to sudden changes on the communication path, and to achieve a power control method with a fast response capable of preventing unnecessary increases in the transmission power (and multiple access interference) of the uplink by reflecting the values of the post-interference cancellation signal-to-interference power ratio in the generation of power control command information. The invention is directed to a power control method in a communication system for performing communications by code-division multiple access between a mobile station and base station, wherein a multiple access interference signal contained in a reception signal from the mobile station is cancelled, a post-interference cancellation signal-to-interference power ratio of the reception signal currently received is estimated, a power control command is generated by comparing the estimated post-interference cancellation signal-to-interference power ratio and a target value for power control, and transmitting this power control command to the mobile station to control the transmission power of the mobile station.

摘要翻译： 本发明的目的是提供具有功率控制方法和干扰消除器的CDMA系统的结构，其可以有效地增加系统容量并且抵抗通信路径上的突然变化，并且实现具有 能够通过在生成功率控制命令信息中反映干扰后消除信号与干扰功率比的值来防止上行链路的发送功率（和多址干扰）的不必要的增加的快速响应。 本发明涉及一种通信系统中的功率控制方法，用于通过移动站与基站之间的码分多址进行通信，其中包含在来自移动台的接收信号中的多址干扰信号被取消， 估计当前接收到的接收信号的干扰消除信号与干扰功率比，通过比较估计的干扰后消除信号与干扰功率比和用于功率控制的目标值，生成功率控制命令，并发送 该功率控制命令到移动台来控制移动台的发射功率。

公开(公告)号：US06463296B1

公开(公告)日：2002-10-08

申请号：US09251018

申请日：1999-02-16

申请人： Riaz Esmailzadeh ,  Paul Peter Butovitsch

发明人： Riaz Esmailzadeh ,  Paul Peter Butovitsch

IPC分类号： H04Q720

CPC分类号： H04W52/06 ,  H04W52/24 ,  H04W52/36 ,  H04W52/40

摘要： A method for controlling the power transmission levels in a spread spectrum or CDMA cellular system is disclosed, in which the decision to increase or decrease the transmission power level of a mobile station or base station, and the amount of any such increase or decrease made, is based on the weighted combination of a plurality of factors that indicate existing channel conditions. For example, the weight can be set according to the reliability of each channel condition factor involved.

摘要翻译： 公开了一种用于控制扩频或CDMA蜂窝系统中的功率传输电平的方法，其中增加或减少移动台或基站的发射功率电平的决定以及任何这种增加或减少的量， 基于指示现有信道条件的多个因素的加权组合。 例如，可以根据所涉及的每个信道条件因素的可靠性设置权重。

公开(公告)号：US07545789B2

公开(公告)日：2009-06-09

申请号：US10834001

申请日：2004-04-29

申请人： Riaz Esmailzadeh ,  Takashi Yano ,  Nobukazu Doi

发明人： Riaz Esmailzadeh ,  Takashi Yano ,  Nobukazu Doi

IPC分类号： H04B7/216

CPC分类号： H04W72/1278 ,  H04B1/707 ,  H04B7/2628 ,  H04W74/008 ,  H04W74/04 ,  H04W74/0833

摘要： In order to accomplish efficient communication of data between a base station and a plurality of mobile terminals, particular orthogonal codes are transmitted from the mobile stations to the base station as alert signals indicating the presence of data to be transmitted. The base station checks whether particular orthogonal codes are contained in the alert signals, and when the particular orthogonal codes are detected in the alert signals, information representing the detected orthogonal codes and the schedules for transmitting the data from the mobile terminals to the base station are transmitted from the base station to the mobile terminals as an alert response to the alert signals. When the information representing the orthogonal codes used for the alert signals are contained in the alert response transmitted from the base station to the mobile terminals, the data waiting to be transmitted is transmitted from the mobile terminals to the base station according the data transmission schedules in the alert response.

公开(公告)号：US07421283B2

公开(公告)日：2008-09-02

申请号：US11544655

申请日：2006-10-10

申请人： Riaz Esmailzadeh ,  Takashi Yano ,  Nobukazu Doi

发明人： Riaz Esmailzadeh ,  Takashi Yano ,  Nobukazu Doi

IPC分类号： H04B7/00 ,  H04B17/00

CPC分类号： H04W52/24 ,  H04W52/362

摘要： A method and apparatus for controlling the power of a signal transmitted between a base station and a mobile terminal which constitute a mobile communication system. At least one of the base station and the mobile terminal has functions to compare a predetermined reference value and a necessary transmission power obtained as a result of transmission power control in order to compensate for a signal intensity fluctuation occurring on a link between the base station and the mobile terminal, temporarily stopping the transmission if the necessary transmission power is larger than a predetermined permissible value, and transmit the signal if the necessary transmission power is equal to or smaller than the predetermined permissible value.

摘要翻译： 一种用于控制在构成移动通信系统的基站和移动终端之间传输的信号的功率的方法和装置。 基站和移动终端中的至少一个具有将预定参考值和作为发送功率控制的结果获得的必要发送功率进行比较的功能，以便补偿基站与基站之间的链路上发生的信号强度波动 如果必要的发送功率大于预定的允许值，则暂时停止发送，并且如果必要的发送功率等于或小于预定的允许值则发送该信号。

公开(公告)号：US07065055B1

公开(公告)日：2006-06-20

申请号：US09665200

申请日：2000-09-18

申请人： Jonas Karlsson ,  Riaz Esmailzadeh

发明人： Jonas Karlsson ,  Riaz Esmailzadeh

IPC分类号： H04B1/44

CPC分类号： H04B1/7103 ,  H04B1/7107 ,  H04B2201/70705 ,  H04B2201/70707

摘要： Method and apparatus for minimizing the processing delay incurred by an IC receiver over conventional receivers in a CDMA cellular system are disclosed. The method and apparatus involve operating the conventional receiver and the IC receiver in parallel to each other. Data from the conventional receiver are then used to supplement data from the IC receiver in order to minimize the delays incurred by the IC receiver.

摘要翻译： 公开了一种用于最小化IC接收机在CDMA蜂窝系统中的常规接收机所引起的处理延迟的方法和装置。 所述方法和装置包括相互并行地操作常规接收器和IC接收器。 然后使用来自常规接收机的数据来补充来自IC接收机的数据，以便最小化由IC接收器引起的延迟。

公开(公告)号：US06546260B2

公开(公告)日：2003-04-08

申请号：US09729272

申请日：2000-12-05

申请人： Riaz Esmailzadeh ,  Takashi Yano ,  Nobukazu Doi

发明人： Riaz Esmailzadeh ,  Takashi Yano ,  Nobukazu Doi

IPC分类号： H04Q7720

CPC分类号： H04W52/24 ,  H04W52/362

摘要： A method and apparatus for controlling the power of a signal transmitted between a base station and a mobile terminal which constitute a mobile communication system. At least one of the base station and the mobile terminal has functions to compare a predetermined reference value and a necessary transmission power obtained as a result of transmission power control in order to compensate for a signal intensity fluctuation occurring on a link between the base station and the mobile terminal, temporarily stopping the transmission if the necessary transmission power is larger than a predetermined permissible value, and transmit the signal if the necessary transmission power is equal to or smaller than the predetermined permissible value.

摘要翻译： 一种用于控制在构成移动通信系统的基站和移动终端之间传输的信号的功率的方法和装置。 基站和移动终端中的至少一个具有将预定参考值和作为发送功率控制的结果获得的必要发送功率进行比较的功能，以便补偿基站与基站之间的链路上发生的信号强度波动 如果必要的发送功率大于预定的允许值，则暂时停止发送，并且如果必要的发送功率等于或小于预定的允许值则发送该信号。

公开(公告)号：US6111869A

公开(公告)日：2000-08-29

申请号：US907088

申请日：1997-08-06

申请人： Riaz Esmailzadeh ,  Takashi Yano ,  Nobukazu Doi

发明人： Riaz Esmailzadeh ,  Takashi Yano ,  Nobukazu Doi

IPC分类号： H04B1/707 ,  H04B7/26 ,  H04J13/18 ,  H04W4/00 ,  H04W72/04 ,  H04W72/12 ,  H04W74/04 ,  H04W74/08 ,  H04W92/10 ,  H04B7/216

CPC分类号： H04B7/2628 ,  H04B1/707

摘要： In order to accomplish efficient communication of data between a base station and a plurality of mobile terminals, particular orthogonal codes are transmitted from the mobile stations to the base station as alert signals indicating the presence of data to be transmitted. The base station checks whether particular orthogonal codes are contained in the alert signals, and when the particular orthogonal codes are detected in the alert signals, information representing the detected orthogonal codes and the schedules for transmitting the data from the mobile terminals to the base station are transmitted from the base station to the mobile terminals as an alert response to the alert signals. When the information representing the orthogonal codes used for the alert signals are contained in the alert response transmitted from the base station to the mobile terminals, the data waiting to be transmitted is transmitted from the mobile terminals to the base station according the data transmission schedules in the alert response.