公开(公告)号：AU5771801A

公开(公告)日：2002-02-07

申请号：AU5771801

申请日：2001-07-30

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MA ZHENGXIANG ,  POLAKOS PAUL ANTHONY

IPC: C12P21/00 ,  C12N1/21 ,  C12R1/19 ,  H01Q1/24 ,  H01Q21/29 ,  H03F1/32 ,  H03F3/24 ,  H03F3/60 ,  H04B1/04 ,  H04B7/02 ,  H04B7/06 ,  H04B7/26

Abstract: The technique of amplifier sharing is implemented in a system designed to accommodate transmit diversity. In one embodiment of the invention, the amplifiers (670 and 675) are shared 1) to amplify a first and a second diversity-encoded signal, each of which represents the information of a first signal that is to be transmitted using transmit diversity, and 2) to amplify a second signal to be transmitted without using transmit diversity. The first and second diversity-encoded signals are used to form a first and a second composite signal. Each composite signal is amplified in a different one of two power amplifiers (670 and 675). Each amplified composite signal is then used to form an amplified first diversity-encoded signal and an amplified second diversity-encoded signal. The first and second composite signals can also be formed using the second signal. Each composite signal is then amplified in a different one of the two power amplifiers (670 and 675) and the two amplified composite signals are used to form an amplified second signal. In another embodiment of the invention, the first and second composite signals can be formed in the digital domain. Each composite signal is digitally pre-distorted and then modulated onto a transmission frequency signal, such as an RF signal. Each pre-distorted composite signal is then amplified in the respective amplifier (670 and 675).

公开(公告)号：BR0005431A

公开(公告)日：2001-08-07

申请号：BR0005431

申请日：2000-11-17

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MA ZHENGXIANG ,  POLAKOS PAUL ANTHONY

IPC: H03F3/68 ,  H03F1/02 ,  H03F1/32 ,  H03F3/20 ,  H03F3/21 ,  H03F3/60

Abstract: A signal amplification system involves decomposing a signal into two or more parts, amplifying the parts and then combining the amplified parts to produce the amplified signal. The decomposition can be done such that the resulting parts have characteristics that are amenable to efficient amplification. For example, decomposition of the signal to be amplified can be done using at least one threshold. The first part of the signal to be amplified can be formed by the portion of the signal within the threshold. As such, because the first part forms a signal with a lower PAR, the first part of the signal can be amplified more efficiently than the original signal. The second part of the signal can be formed by the portion of the original signal beyond the threshold. Because the second part is mostly zero, the second part can also be amplified efficiently, for example with a class C type amplifier which does not dissipate any energy when the input signal is zero.

公开(公告)号：CA2324846A1

公开(公告)日：2001-05-19

申请号：CA2324846

申请日：2000-10-31

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MA ZHENGXIANG ,  POLAKOS PAUL ANTHONY

IPC: H03F3/68 ,  H03F1/02 ,  H03F1/32 ,  H03F3/20 ,  H03F3/21 ,  H03F3/60

Abstract: A signal amplification system involves decomposing a signal into two or mo re parts, amplifying the parts and then combining the amplified parts to produc e the amplified signal. The decomposition can be done such that the resulting part s have characteristics that are amenable to efficient amplification. For example, decomposition of the signal to be amplified can be done using at least one threshold. The first part of the signal to be amplified can be formed by the portion of the signal within the threshold. As such, because the first part forms a signal with a lower PAR, the first part of the signal can be amplified more efficiently than the original signal. The second part of the signal can be formed by the portion of the original signal beyond the threshold. Because the second part is mostly zero, the second par t can also be amplified efficiently, for example with a class C type amplifier whi ch does not dissipate any energy when the input signal is zero.

公开(公告)号：AU5017099A

公开(公告)日：2000-04-13

申请号：AU5017099

申请日：1999-09-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MA ZHENGXIANG ,  RITTENHOUSE GEORGE E ,  WU HUI

IPC: H03D1/22 ,  H04B1/06 ,  H04B1/30 ,  H04B1/7097 ,  H04J13/00 ,  H04M1/30

Abstract: A single-ended homodyne receiver demodulates quadrature signals containing spectral nulls by using an extremely low intermediate-frequency that normally would create substantial self-interference. This is accomplished by judiciously placing the spectral nulls over the critical sections of the signal spectrum, ensuring that the self-interference is minimized. As an example, a direct-sequence CDMA signal that was constructed with not more than one half the available Walsh functions is demodulated directly by placing the intermediate frequency such that spectral nulls in the CDMA signal overlap the spectral peaks in the desired signal, thereby eliminating the self-interference. This single-ended homodyne receiver can be implemented using either integrated or discrete components.

公开(公告)号：WO2008066726A3

公开(公告)日：2008-07-31

申请号：PCT/US2007024145

申请日：2007-11-16

Applicant: LUCENT TECHNOLOGIES INC ,  CLAUSSEN HOLGER ,  HO LESTER TSE WEE ,  KENNEDY IRWIN O ,  MA ZHENGXIANG

Inventor： CLAUSSEN HOLGER ,  HO LESTER TSE WEE ,  KENNEDY IRWIN O ,  MA ZHENGXIANG

IPC: H04W36/04 ,  H04W48/12

CPC classification number: H04W36/04 ,  H04W4/06 ,  H04W36/0083 ,  H04W48/12

Abstract: A wireless communication technique provides mobility for a mobile station (52) to communicate with an overlay network device (40), which is within a coverage area (34) of an underlay network device (24), when the mobile station (52) is within a coverage area (42) of both devices. The overlay network device (40) broadcasts at least two downlink channels. A cell code (e.g., a scrambling code or pseudo noise offset) of a first one of the downlink channels identifies an overlay network device (40) exclusively. The mobile station (52) can detect the first downlink channel responsive to an indication of the exclusive cell code from the underlay network device. A second one of the downlink channels allows for subsequent, ongoing communications between the mobile station and the overlay network device.

Abstract translation: 当移动台（52）是移动台（52）时，无线通信技术为移动台（52）提供移动性以与覆盖网络设备（24）的覆盖区域（34）内的覆盖网络设备 在两个设备的覆盖区域（42）内。 覆盖网络设备（40）广播至少两个下行链路信道。 第一个下行链路信道的小区代码（例如，扰码或伪噪声偏移）专门识别覆盖网络设备（40）。 移动台（52）可以响应于来自底层网络设备的专用小区代码的指示来检测第一下行链路信道。 下行链路信道中的第二个允许移动台和覆盖网络设备之间的后续正在进行的通信。