公开(公告)号：US20040076170A1

公开(公告)日：2004-04-22

申请号：US10273838

申请日：2002-10-18

Applicant: NORTEL NETWORKS LIMITED

Inventor： Mark Earnshaw ,  Eman A. Fituri ,  Gamini Senarath ,  David G. Steer

IPC: H04B007/216

CPC classification number: H04J13/20 ,  H04B2201/709709 ,  H04J13/0044

Abstract: The present invention uses a portion of an orthogonal spreading code space in a CDMA spectrum for uplink signaling from a user element to a base station. By assigning the user elements one or more signaling codes, which are orthogonal to those used to spread data, to use for uplink signaling, the present invention significantly reduces interference between signaling channels, and between the data channels and the signaling channels, while supporting additional capacity. The signaling codes may be individually assigned to user elements or assigned to groups of user elements. Further, different length signaling codes may be assigned to the user elements to support different signaling rates depending on Quality of Service (QoS) requirements.

Abstract translation: 本发明使用CDMA频谱中的正交扩展码空间的一部分用于从用户单元到基站的上行链路信令。 通过为用户元件分配与用于扩展数据的那些正交的一个或多个信令码用于上行链路信令，本发明显着减少信令信道之间以及数据信道和信令信道之间的干扰，同时支持附加 容量。 信令代码可以被单独分配给用户元素或分配给用户组的组。 此外，可以将不同长度的信令码分配给用户元件，以根据服务质量（QoS）要求来支持不同的信令速率。

公开(公告)号：US20030103445A1

公开(公告)日：2003-06-05

申请号：US09998193

申请日：2001-12-03

Applicant: NORTEL NETWORKS LIMITED

Inventor： David G. Steer ,  Koon Hoo Teo ,  William R. Kirkland

IPC: H04J011/00

CPC classification number: H04L27/2602 ,  H04L5/143

Abstract: Wireless communication is improved by simultaneously transmitting signals that are orthogonal to received signals. This technique is referred to as Orthogonal Division Duplexing or ODD. Channel characteristics may be estimated based on an analysis of the received signals. Subsequently, techniques used in the transmitting of signals may be adjusted based on the estimated channel characteristics. By using interleaved pilot sub-carriers, each end of a communications link may take measurements of channel conditions. These measurements may be used to adapt the transmission techniques used in the transmitter to the measured channel conditions. Advantageously, this adaptation can occur without the delay in reporting conditions that is characteristic of traditional adaptive communications systems.

Abstract translation: 通过同时发送与接收信号正交的信号来提高无线通信。 该技术被称为正交分割双工或ODD。 可以基于对接收到的信号的分析来估计信道特性。 随后，可以基于估计的信道特性来调整用于发送信号的技术。 通过使用交织的导频子载波，通信链路的每一端可以进行信道条件的测量。 这些测量可以用于使发射机中使用的传输技术适应测量的信道条件。 有利地，这种适应可以在没有传统自适应通信系统的特征的报告条件的延迟的情况下发生。

公开(公告)号：US20040081113A1

公开(公告)日：2004-04-29

申请号：US10273965

申请日：2002-10-18

Applicant: NORTEL NETWORKS LIMITED

Inventor： Mark Earnshaw ,  Eman A. Fituri ,  Gamini Senarath ,  David G. Steer

IPC: H04B007/216

CPC classification number: H04J11/0023 ,  H04J13/004

Abstract: The present invention uses a portion of an orthogonal spreading code space in a CDMA spectrum for uplink signaling from a user element to a base station. By assigning the user elements one or more signaling codes, which are orthogonal to those used to spread data, to use for uplink signaling, the present invention significantly reduces interference between signaling channels, and between the data channels and the signaling channels, while supporting additional capacity. The signaling codes may be individually assigned to user elements or assigned to groups of user elements. Further, different length signaling codes may be assigned to the user elements to support different signaling rates depending on Quality of Service (QoS) requirements.

公开(公告)号：US20020118784A1

公开(公告)日：2002-08-29

申请号：US09746929

申请日：2000-12-26

Applicant: NORTEL NETWORKS LIMITED

Inventor： Koon H. Teo ,  Shiquan Wu ,  David G. Steer

IPC: H04B001/10

CPC classification number: H04W16/14 ,  H04B1/406 ,  H04B1/7105 ,  H04W4/18 ,  H04W88/02

Abstract: An RF radio receiver utilizing wideband RF technology, a wideband digital IF (channelizer) tuner, a common digitizing rate, and multi-user detection (MUD) processes a superposed RF signal to allow simultaneous reception of two or more RF signals sharing overlapping frequency spectrum (RF bandwidth). The RF radio receiver is particularly effective for two or more RF signals of differing RF channel bandwidth and can also receive signals which accord to different air interface standards. The use of a common digitizing rate provides for oversampling of at least one of the RF signals for more accurate decoding and allows for a synchronized signal (i.e. at a common rate) to be used in decoding, and in particular multi-user decoding of other RF signals.

Abstract translation: 使用宽带RF技术的RF无线电接收机，宽带数字IF（信道化器）调谐器，公共数字化速率和多用户检测（MUD）处理叠加的RF信号，以允许同时接收共享重叠频谱的两个或更多个RF信号 （RF带宽）。 RF无线电接收机对于具有不同RF信道带宽的两个或更多个RF信号特别有效，并且还可以接收符合不同空中接口标准的信号。 使用通用的数字化速率提供至少一个RF信号的过采样以便更准确的解码，并且允许将同步的信号（即以公共速率）用于解码，并且特别是其他的多用户解码 射频信号。