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公开(公告)号：CA2280377A1
公开(公告)日：2000-04-06
申请号：CA2280377
申请日：1999-08-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , RITTENHOUSE GEORGE E , WU HUI
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.
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公开(公告)号：AU769523B2
公开(公告)日：2004-01-29
申请号：AU7153600
申请日：2000-11-10
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , POLAKOS PAUL ANTHONY
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.
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公开(公告)号：AU755367B2
公开(公告)日：2002-12-12
申请号：AU5017099
申请日：1999-09-28
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , RITTENHOUSE GEORGE E , WU HUI
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.
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公开(公告)号：CA2352369A1
公开(公告)日：2002-02-04
申请号：CA2352369
申请日：2001-07-04
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 , H04B1/02
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 t o 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 composi te 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 secon d 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 composi te 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 a n RF signal. Each pre-distorted composite signal is then amplified in the respective amplifier (670 and 675).
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公开(公告)号：DE60102882D1
公开(公告)日：2004-05-27
申请号：DE60102882
申请日：2001-02-12
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 , H03F3/68
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).
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Patent Agency Ranking
公开(公告)号：DE60000312D1
公开(公告)日：2002-09-12
申请号：DE60000312
申请日：2000-10-03
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BARNETT RON , KORISCH IIYA ALEXANDER , MA ZHENGXIANG , SCHWARTZ RICHARD F , WU HUI
Abstract: A transceiver (100) comprises a stacked metal laminate assembly of a plurality of layers (104-112) inside an enclosure (102). A first layer (104) forms an antenna. A second layer (106) forms a ground plane for the antenna. A third layer (108) forms "front-end" filters (duplexer). A fourth layer (110) together with the second layer forms an electromagnetic isolation enclosure for the filters. A fifth layer (112) comprises a PC board with electronic circuits of the transceiver mounted thereon, and is both mounted to and electronically shielded by the fourth layer. Each of the first through fourth layers is preferably made from a single metal layer, such as a sheet of metal, by stamping. Each of the first through fourth layers is either bent along its periphery into a substantially "cake-pan" shape, or is flat and has a separate side wall (130) attached thereto. Flanges (122 and 124) that are unitarily formed with the filters extend through orifices (126 and 128) in the second and fourth layers to connect the filters with the antenna and the electronic circuits. The connections may be conductive or capacitive. The assembly is put together by stacking the first through fourth layers and then epoxying, soldering, or welding them together.
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公开(公告)号：BR0103056A
公开(公告)日：2002-04-02
申请号：BR0103056
申请日：2001-07-27
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 , H04Q7/22
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).
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公开(公告)号：AU7153600A
公开(公告)日：2001-05-24
申请号：AU7153600
申请日：2000-11-10
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , POLAKOS PAUL ANTHONY
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.
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公开(公告)号：BR9904346A
公开(公告)日：2000-06-13
申请号：BR9904346
申请日：1999-09-27
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , RITTENHOUSE GEORGE E , WU HUI
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.
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公开(公告)号：DE60102882T2
公开(公告)日：2005-04-21
申请号：DE60102882
申请日：2001-02-12
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 , H03F3/68
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).
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