公开(公告)号：EP1005190B1

公开(公告)日：2007-01-17

申请号：EP99309095.0

申请日：1999-11-16

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Mujtaba, Syed Aon

IPC: H04L5/14 ,  H04L5/02

CPC classification number: H04L5/023 ,  H04L5/143

公开(公告)号：EP1158824A2

公开(公告)日：2001-11-28

申请号：EP01304255.1

申请日：2001-05-14

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Mujtaba, Syed Aon ,  Gabara, Thaddeus John

IPC: H04Q7/30

CPC classification number: H04W16/32

Abstract: A control technique for a communication system in which a microcell base station is co-located with a macrocell base station. The microcell base station tracks hot spots as they move within the macrocell. The microcell base station may utilize a two-dimensional (2-D) antenna array, which is co-located with the macro cell antenna. The two-dimensional antenna is steerable in both the horizontal and vertical directions. The size of the microcell coverage area depends upon the distance from the cell site antenna as well as the dimensionality of the array, which determines the angular spread of the beam. Filter tap weights may be adjusted to point the beam to any desired location in the macrocell. The orthogonality between the macrocell and the microcell may be obtained either in the frequency domain or in the code domain, depending upon the system in which it is implemented.

Abstract translation: 一种用于其中微小区基站与宏小区基站位于同一位置的通信系统的控制技术。 微小区基站在宏小区内移动时跟踪热点。 微小区基站可以利用与宏小区天线共同定位的二维（2-D）天线阵列。 二维天线在水平和垂直两个方向都是可操纵的。 微小区覆盖区域的大小取决于距离小区站点天线的距离以及阵列的维数，这决定了射束的角度扩展。 可以调整滤波器抽头权重以将波束指向宏单元中的任何所需位置。 宏单元和微小区之间的正交性可以在频域或代码域中获得，这取决于其实现的系统。

公开(公告)号：EP0967730B1

公开(公告)日：2009-10-21

申请号：EP99304665.5

申请日：1999-06-15

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Mujtaba, Syed Aon

IPC: H03M13/41

CPC classification number: H03M13/6563 ,  H03M13/3961 ,  H03M13/4107 ,  H03M13/4169 ,  H03M13/6577

公开(公告)号：EP0917325A3

公开(公告)日：2002-04-17

申请号：EP98308978.0

申请日：1998-11-03

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Mujtaba, Syed Aon

IPC: H04L27/02

CPC classification number: H04L27/02

Abstract: Methods, apparatus and system are described for transmitting signals in QPSK, QAM and other similar modulation formats as single sideband (SSB) signals. An exemplary SSB-QPSK transmitter (60) receives an in-phase data signal x(n) and a quadrature-phase data signal y(n). The in-phase data signal and a Hilbert transform (74) of the quadrature-phase data signal are modulated (80) onto a cosine carrier signal, the quadrature-phase data signal and a Hilbert transform (68) of the in-phase data signal are modulated (84) onto a sine carrier signal, and the modulated sine and cosine carrier signals are combined (86) to provide a modulated SSB-QPSK signal. The in-phase and quadrature-phase data signals are time-aligned signals which are interpolated (62,64) prior to modulation so as to include zero values at alternating instants of time. Their corresponding Hilbert transforms therefore also exhibit alternating zero values. During modulation, the in-phase data signal can thus be interleaved with Hilbert transforms of the quadrature-phase data signal, and the quadrature-phase data signal can be interleaved with Hilbert transforms of the in-phase data signal, without any interference between the signals. Coherent quadrature detection may be used to recover both the in-phase and quadrature-phase data signals at a receiver.

公开(公告)号：EP1005180A2

公开(公告)日：2000-05-31

申请号：EP99309123.0

申请日：1999-11-16

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Mujtaba, Syed Aon

IPC: H04B7/26

CPC classification number: H04L5/143 ,  H04L5/023

Abstract: Methods and apparatus for wireless communication in systems such as omni-beam and narrow-beam fixed wireless loop (FWL) systems. In a first technique in accordance with the invention, referred to as code division duplex (CDD) time-slotted CDMA, uplink and downlink portions of the system are separated using code division duplexing, while the users within a given cell are also separated using codes, e.g., using time-slotted CDMA. In a second technique in accordance with the invention, referred to as time division duplex (TDD) time-slotted CDMA, uplink and downlink portions of the system are separated using time division duplexing, e.g., time slots, while the users in a given cell are separated using codes, e.g., time-slotted CDMA. Both the CDD and TDD techniques may make use of an electronically-steered beam which is designed to provide simultaneous coverage within a given cell for two or more users separated by codes. In a third technique in accordance with the invention, referred to as orthogonal frequency division multiplexing (OFDM), uplink and downlink portions of the system are separated in frequency, while the users are, e.g., also separated in frequency.

Abstract translation: 的方法和装置用于无线通信系统中：例如全光束和固定无线回路（FWL）系统的窄光束。 在与本发明雅舞蹈第一种技术中，通过对被称为码分双工（CDD）时隙化CDMA，该系统的上行链路和下行链路部分使用码分双工分离，同时，给定小区内的用户因此使用码来分离 ，例如，使用时隙化CDMA。 在与本发明雅舞蹈第二种技术中，通过对被称为时分双工（TDD）时隙化CDMA，该系统的上行链路和下行链路部分使用时分双工，例如，时间槽分开，而在一个给定小区内的用户 使用的代码是分开的，例如，时隙化CDMA。 两个CDD和TDD技术可利用的电子转向的光束全部被设计用于通过码来分离两个或多个用户在给定小区内，以提供同时覆盖。 在与本发明雅舞蹈第三种技术，通过被称为正交频分复用（OFDM），该系统的上行链路和下行链路部分中的频率是分开的，而用户是，例如在频率，以便分离。

公开(公告)号：EP0932259A1

公开(公告)日：1999-07-28

申请号：EP98300556.2

申请日：1998-01-27

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Luschi, Carlo ,  Mujtaba, Syed Aon ,  ten Brink, Stephan ,  Sandell, Magnus ,  Yan, Ran-Hong ,  Strauch, Paul Edward

IPC: H03M13/00

CPC classification number: H03M13/2948 ,  H03M13/29

Abstract: Apparatus and method for iteratively decoding a signal are provided. The apparatus includes a central pool of resources for iteratively decoding signals. The central pool may run a plurality of iterative decoding processes, each process being allocated to a signal processing unit upon request and depending upon resource availability.

Abstract translation: 提供了用于迭代解码信号的装置和方法。 该装置包括用于迭代地解码信号的中央资源池。 中央池可以运行多个迭代解码过程，每个处理根据请求分配给信号处理单元，并且取决于资源可用性。

公开(公告)号：EP1005180A3

公开(公告)日：2006-03-15

申请号：EP99309123.0

申请日：1999-11-16

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Mujtaba, Syed Aon

IPC: H04B7/26

CPC classification number: H04L5/143 ,  H04L5/023

Abstract: Methods and apparatus for wireless communication in systems such as omni-beam and narrow-beam fixed wireless loop (FWL) systems. In a first technique in accordance with the invention, referred to as code division duplex (CDD) time-slotted CDMA, uplink and downlink portions of the system are separated using code division duplexing, while the users within a given cell are also separated using codes, e.g., using time-slotted CDMA. In a second technique in accordance with the invention, referred to as time division duplex (TDD) time-slotted CDMA, uplink and downlink portions of the system are separated using time division duplexing, e.g., time slots, while the users in a given cell are separated using codes, e.g., time-slotted CDMA. Both the CDD and TDD techniques may make use of an electronically-steered beam which is designed to provide simultaneous coverage within a given cell for two or more users separated by codes. In a third technique in accordance with the invention, referred to as orthogonal frequency division multiplexing (OFDM), uplink and downlink portions of the system are separated in frequency, while the users are, e.g., also separated in frequency.

公开(公告)号：EP1005179A3

公开(公告)日：2002-10-09

申请号：EP99309112.3

申请日：1999-11-16

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Mujtaba, Syed Aon

IPC: H04B7/26

CPC classification number: H04B7/26 ,  H04L5/023 ,  H04L5/143

Abstract: Methods and apparatus for wireless communication in systems such as omni-beam and narrow-beam fixed wireless loop (FWL) systems. In a first technique in accordance with the invention, referred to as code division duplex (CDD) time-slotted CDMA, uplink and downlink portions of the system are separated using code division duplexing, while the users within a given cell are also separated using codes, e.g., using time-slotted CDMA. In a second technique in accordance with the invention, referred to as time division duplex (TDD) time-slotted CDMA, uplink and downlink portions of the system are separated using time division duplexing, e.g., time slots, while the users in a given cell are separated using codes, e.g., time-slotted CDMA. Both the CDD and TDD techniques may make use of an electronically-steered beam which is designed to provide simultaneous coverage within a given cell for two or more users separated by codes. In a third technique in accordance with the invention, referred to as orthogonal frequency division multiplexing (OFDM), uplink and downlink portions of the system are separated in frequency, while the users are, e.g., also separated in frequency.

公开(公告)号：EP0954144A1

公开(公告)日：1999-11-03

申请号：EP99303283.8

申请日：1999-04-27

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Luschi, Carlo ,  Sandell, Magnus ,  Mujtaba, Syed Aon ,  Strauch, Paul Edward ,  ten Brink, Stephan, Dipl.-Ing. ,  Yan, Ran-Hong

IPC: H04L25/02

CPC classification number: H04L25/02 ,  H04L25/0212 ,  H04L25/0224 ,  H04L25/067

Abstract: A method of estimating channel impulse response in a signal transmitted over a channel in a communication system is described. The channel estimator obtains a priori knowledge about the transmitted signal and then use the transmitted signal and the a priori knowledge to choose an estimate of channel impulse response which minimises the expected distance between the transmitted signal and a reconstructed signal. The expected distance that is minimised is a cost function, represented by E{∥ r - B h∥ 2 | r }. By using soft decision feedback, the invention minimises erroneous decision feedback which can cause error propagation. The decision are usually in the form of log likelihood ratios (LLR).

Abstract translation: 描述了在通信系统中通过信道发送的信号中估计信道脉冲响应的方法。 信道估计器获得关于发射信号的先验知识，然后使用发射信号和先验知识来选择信道脉冲响应的估计，其使发射信号和重建信号之间的预期距离最小化。 最小化的预期距离是一个成本函数，由EäPARALLEL r - Bh PARALLEL <2> |rü表示。 通过使用软判决反馈，本发明使可能导致错误传播的错误判定反馈最小化。 决策通常采用对数似然比（LLR）的形式。

公开(公告)号：EP1158824B1

公开(公告)日：2009-08-05

申请号：EP01304255.1

申请日：2001-05-14

Applicant: LUCENT TECHNOLOGIES INC.

Inventor： Mujtaba, Syed Aon ,  Gabara, Thaddeus John

IPC: H04W16/32

CPC classification number: H04W16/32