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公开(公告)号：JP2002101027A
公开(公告)日：2002-04-05
申请号：JP2001235155
申请日：2001-08-02
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: PROBLEM TO BE SOLVED: To effectively utilize the capacity of power in the amplifier of a transmission diversity type wireless communication system. SOLUTION: In a signal amplification method that amplifies a diversity- encoded signal for expressing the information of a first signal transmitted by diversity as first and second diversity-encoded signals, and at the same time, amplifies a second signal that is transmitted without using transmission diversities, amplifiers 670 and 675 are used shared in the signal amplification method for sharing the amplification of the first and second diversity-encoded signals and that of the second signal. In the first power amplifier 670, the first diversity- encoded signal is used for forming a first composite signal. In the second power amplifier 675, the second diversity coding signal is used for forming a second composited signal. In the first and second power amplifiers 670 and 675, the first and second composited signals are amplified, respectively.
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公开(公告)号：JP2002095066A
公开(公告)日：2002-03-29
申请号：JP2001205905
申请日：2001-07-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , POLAKOS PAUL ANTHONY
Abstract: PROBLEM TO BE SOLVED: To provide a method for reducing a peak to mean power ratio of a communication system, capable of decreasing the peak to mean power ratio in a wireless communication system, using a wireless protocol using pilot symbols. SOLUTION: The method for reducing peak to mean power ratio of the communication system comprises a step of providing a plurality of code channels, and a step of respectively assigning phase rotation to the plurality of channels. The plurality of channels are placed individually by using the phase rotations. The phase rotations may be multiples of ±π/2 or ±π.
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公开(公告)号：JP2001189630A
公开(公告)日：2001-07-10
申请号：JP2000350488
申请日：2000-11-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , POLAKOS PAUL ANTHONY
Abstract: PROBLEM TO BE SOLVED: To provide an efficient power amplifier architecture for linearly amplifying a signal having the possibility of high peak power. SOLUTION: An amplified signal is generated by decomposing a signal 16 into two parts 18 and 22, amplifying these parts and coupling the amplified parts. The decomposition is performed so as to have characteristics capable of facilitating the efficient amplification in the part to be obtained. For example, the signal to be amplified is decomposed while using at least one threshold 20. The part 18 of the signal to be amplified is formed from the part of a signal within the threshold. Since the part 18 forms a signal having low PAR, the part 18 of the signal can be efficiently amplified rather than the original signal. The part 22 of the signal is formed from the part of the original signal, which exceeds the threshold. Since the part 22 is almost zero, the part 22 can be efficiently amplified by a C-class amplifier, which does not consume energy when an input signal is zero.
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公开(公告)号：JP2001094371A
公开(公告)日：2001-04-06
申请号：JP2000224838
申请日：2000-07-26
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , POLAKOS PAUL ANTHONY
Abstract: PROBLEM TO BE SOLVED: To provide a system and method for effectively reducing the peak of a signal which should be amplified in a communication system. SOLUTION: A signal notching system reduces a signal peak by notching the peak of a signal exceeding a threshold to generate a notched signal. Then, the notched signal is filtered in order to generate the signal of a result having a reduced amplitude. In constitution where a signal is expressed by a signal sample, e.g. a peak notching system first traces a peak sample exceeding the threshold such as a sample expressing the positive peak sample of the peak exceeding the threshold. When the peak sample is traced, the peak notching system adjusts the peak sample by a quantity being the function of the exceeding quantity of the threshold by the peak sample to effectively generate a notched signal having one sample notch at the peak. A peak notching system filters the notched signal to fill the notch to generate a signal having a reduced peak.
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公开(公告)号：JP2000115010A
公开(公告)日：2000-04-21
申请号：JP28503499
申请日：1999-10-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , RITTENHOUSE GEORGE E , WU HUI
Abstract: PROBLEM TO BE SOLVED: To obtain a homodyne radio receiver using a low intermediate frequency for an orthogonal signal by demodulating an applied signal by means of a specified frequency and recovering an IF signal corresponding to a base band signal which is demodulated by means of the specified frequency. SOLUTION: The outputs of demodulators 70 and 75 are respectively supplied to elements 80 and 85. In them, input signals are multiplied by Wi and results are integrated over one signal period. That is, the demodulators 70 and 75 are used for demodulating an added (transmitted) signal corresponding to the base band signal of a band width ωA which is modulated by the signal having the frequency ωc. By the demodulators 70 and 75, the added (transmitted) signal is demodulated by the frequency ωLO (ωc+ωA>ωLO>ωc-ωA and also ωLO≠ωc) so that the IF signal corresponding to the base band signal which is demodulated by the frequency ωIF=ωc-ωLO is obtained.
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Patent Agency Ranking
公开(公告)号：CA2314555C
公开(公告)日：2003-12-02
申请号：CA2314555
申请日：2000-07-20
Applicant: LUCENT TECHNOLOGIES INC
Inventor： POLAKOS PAUL ANTHONY , MA ZHENGXIANG
Abstract: A signal notching system reduces signal peaks by notching the peak of a signal above a threshold to produce a notched signal. The notched signal is then filtered to produce a resulting signal with a reduced peak amplitude. For example, in an implementation where the signal is represented by signal samples, the peak notching system first locates a peak sample that is beyond a threshold, such as a sample representing a positive peak sample of a peak above the threshold. Once a peak sample is located, the peak notching system adjusts the peak sample by an amount which is a function of the amount that the peak sample is beyond the threshold, effectively creating a notched signal with a one sample notch at the peak. The peak notching system filters the notched signal to fill in the notch to produce a signal with a reduced peak.
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公开(公告)号：CA2324846C
公开(公告)日：2003-03-18
申请号：CA2324846
申请日：2000-10-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： POLAKOS PAUL ANTHONY , MA ZHENGXIANG
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.
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公开(公告)号：AU4878700A
公开(公告)日：2001-02-01
申请号：AU4878700
申请日：2000-07-24
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , POLAKOS PAUL ANTHONY
IPC: H03G7/06 , H03F1/32 , H03G3/30 , H04B1/04 , H04L25/03 , H04L27/00 , H03G11/00 , H04B7/216 , H04J14/02
Abstract: A signal notching system reduces signal peaks by notching the peak of a signal above a threshold to produce a notched signal. The notched signal is then filtered to produce a resulting signal with a reduced peak amplitude. For example, in an implementation where the signal is represented by signal samples, the peak notching system first locates a peak sample that is beyond a threshold, such as a sample representing a positive peak sample of a peak above the threshold. Once a peak sample is located, the peak notching system adjusts the peak sample by an amount which is a function of the amount that the peak sample is beyond the threshold, effectively creating a notched signal with a one sample notch at the peak. The peak notching system filters the notched signal to fill in the notch to produce a signal with a reduced peak.
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公开(公告)号：CA2314555A1
公开(公告)日：2001-01-28
申请号：CA2314555
申请日：2000-07-20
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MA ZHENGXIANG , POLAKOS PAUL ANTHONY
Abstract: A signal notching system reduces signal peaks by notching the peak of a sign al above a threshold to produce a notched signal. The notched signal is then filtered to produce a resulting signal with a reduced peak amplitude. For example, in an implementation where the signal is represented by signal samples, the peak notching system first locates a peak sample that is beyond a threshold, such as a sample representing a positive peak sample of a peak above the threshold. Once a pe ak sample is located, the peak notching system adjusts the peak sample by an amount which is a function of the amount that the peak sample is beyond the threshold, effectively creating a notched signal with a one sample notch at the peak. The peak notching syst em filters the notched signal to fill in the notch to produce a signal with a reduced peak.
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公开(公告)号：DE60000312T2
公开(公告)日：2003-04-03
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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