公开(公告)号：JP2002158616A

公开(公告)日：2002-05-31

申请号：JP2001286007

申请日：2001-09-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISCHER GEORG ,  ERNST OBERNOSTERER FRANK GERHA

IPC: H04B1/04 ,  H04B7/06 ,  H04B7/08 ,  H04B7/10 ,  H04B7/26

Abstract: PROBLEM TO BE SOLVED: To provide a wireless system, an antenna configuration and a polarization modulator that can more effectively utilize frequencies available for a wireless network, resulting in reduction of a cluster size of the wireless network. SOLUTION: Additional improvements in frequency utilization in the wireless network is attained by adopting the wireless system, that is provided with base stations (10) each having at least one transmitter (TX) and at least one receiver (RX1, RX2) and to each of which, at least one dual polarization antenna (27) is assigned. Assigning the polarization modulator (24) changing the polarization of a transmission signal to be sent at a prescribed time to the dual polarization antenna can more effectively utilize the available frequency band, resulting in reduced cluster size.

公开(公告)号：JP2006222971A

公开(公告)日：2006-08-24

申请号：JP2006033158

申请日：2006-02-10

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISCHER GEORG

IPC: H03H7/12 ,  H03H7/075 ,  H03H7/46

Abstract: PROBLEM TO BE SOLVED: To provide a filter with which the size of a duplex filter can be reduced and the selectivity of base station can be enhanced. SOLUTION: This filter unit cell includes a variable capacitor 205, connected in series between a first node 210 and a second node 215, and an inductor coupled in series between the second node and a third node. A bandpass filter includes an input node, an output node, and a plurality of filter unit cells connected in series between the input node and the output node. The filter unit cell includes a variable capacitor, connected in series between the first node and the second node, and an inductor connected in series between the second node and the third node. COPYRIGHT: (C)2006,JPO&NCIPI

公开(公告)号：JP2003188782A

公开(公告)日：2003-07-04

申请号：JP2002295536

申请日：2002-10-09

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISCHER GEORG

IPC: H04B7/02 ,  H04B1/713 ,  H04B7/06 ,  H04B7/10

Abstract: PROBLEM TO BE SOLVED: To provide an improved antenna hopping sequence for TX diversity in a wireless telecommunication system. SOLUTION: In the overall spectrum efficiency of the wireless telecommunication system, at least one multiframe signal having a plurality of sub-frames in which predefined logic channels (BCCH, FCCH and SCH) are repeatedly embedded in the predefined sub-frame is transmitted and a transmitter diversity is applied using an antenna and/or polarization hopping sequences to transmit each of the logic channels (BCCH, FCCH and SCH) at least twice by using different antennas and/or polarized waves during the transmission of one multiframe. Thus, the total spectrum efficiency of the wireless telecommunication system, in particular of a mobile communication system, is improved. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2002026636A

公开(公告)日：2002-01-25

申请号：JP2001163590

申请日：2001-05-31

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISCHER GEORG ,  MANZIONE LOUIS T ,  TSAI MING-JU

IPC: H01Q21/28 ,  H01Q5/00 ,  H01Q5/35 ,  H01Q9/04 ,  H01Q13/08 ,  H01Q23/00

Abstract: PROBLEM TO BE SOLVED: To provide an antenna structure for mobile communication that transmits and receives an electromagnetic signal and is especially in compliance with the GSM(Global Systems for Mobile communications) standards. SOLUTION: One task of this invention is to provide an antenna structure causing decoupling especially between a transmission path and a reception path. The purpose is attained by the antenna structure of this invention having preferably e.g. two vertical couplings and provided with two separate ports for connection to a transmitter and a receiver. Furthermore, the impedance of the two couplings can independently and advantageously be matched with that of frequency band of a signal transmitted or received by the transmitter/the receiver.

公开(公告)号：WO2007108960A3

公开(公告)日：2008-01-24

申请号：PCT/US2007006061

申请日：2007-03-09

Applicant: LUCENT TECHNOLOGIES INC ,  FISCHER GEORG ,  SCHEFCZIK HANS PETER

Inventor： FISCHER GEORG ,  SCHEFCZIK HANS PETER

IPC: H04L12/56 ,  H04W4/22 ,  H04W76/04 ,  H04W84/02 ,  H04W92/02 ,  H04W92/12 ,  H04W92/14 ,  H04W92/20

CPC classification number: H04W4/22 ,  H04W76/007 ,  H04W76/04 ,  H04W84/10 ,  H04W92/12

Abstract: A method and an apparatus are provided for enabling a wireless communication over a network in response to an indication of an emergency. The method comprises causing a base station to provide a wireless backhaul link in an uplink frequency band for further sending a call over the network in response to the call associated with the emergency. Reconfiguration enables turning a base station or base station router into a high power terminal. In this way, emergency calls may be completed over a network having at least one malfunctioning backhaul communications link in a network backbone.

Abstract translation: 提供了一种方法和装置，用于响应于紧急情况的指示，实现网络上的无线通信。 该方法包括使基站在上行链路频带中提供无线回程链路，以响应于与紧急情况相关联的呼叫，进一步发送通过网络的呼叫。 重新配置使得能够将基站或基站路由器转换成高功率终端。 以这种方式，可以通过网络中完成紧急呼叫，该网络在网络骨干网中具有至少一个故障的回程通信链路。

公开(公告)号：DE602007005814D1

公开(公告)日：2010-05-20

申请号：DE602007005814

申请日：2007-11-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： PIVIT FLORIAN ,  HESSELBARTH JAN ,  FISCHER GEORG ,  CHALERMWISUTKUL SURAMATE

IPC: H04L25/03 ,  H04L27/00

Abstract: The invention concerns a radio frequency transmitter (RFT) and a method of amplifying a radio frequency input signal (S IN ) in the radio frequency transmitter (RFT). The radio frequency transmitter (RFT) comprises a digital signal generator (DSG) with a generation unit (GU) adapted to generate a pulsed bit stream signal and a switch mode power amplifier (SMPA) with a transistor circuit (PT) adapted to amplify the radio frequency input signal (S IN ). The digital signal generator (DSG) further comprises a control unit (CU) adapted to detect in said pulsed bit stream signal a sequence of a constant signal height longer than a predefined threshold. The control unit (CU) is also adapted to initiate, upon detection of said sequence, a generation of a modified pulsed bit stream signal by an insertion of one or more notches in said sequence. Said notches interrupt said sequence by a signal of a signal height different from the signal height of the sequence. The radio frequency transmitter (RFT) further comprises connecting means (CM) adapted to provide said transistor circuit (PT) with said modified pulsed bit stream signal as the radio frequency input signal (S IN ).

公开(公告)号：DE60025895T2

公开(公告)日：2006-10-19

申请号：DE60025895

申请日：2000-10-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISCHER GEORG

IPC: H03G3/00 ,  H03G3/30

公开(公告)号：DE60131169T2

公开(公告)日：2008-08-07

申请号：DE60131169

申请日：2001-09-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISCHER GEORG ,  SCHODEL MARKUS

IPC: H04B7/005

公开(公告)号：DE60022159T2

公开(公告)日：2006-04-13

申请号：DE60022159

申请日：2000-02-28

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISCHER GEORG ,  RIEMANN VOLKER

IPC: H04L27/36 ,  H03C3/08 ,  H03C3/09 ,  H04B1/04 ,  H04L27/20

Abstract: The invention relates, inter alia, to a transmitter device, in particular for a base transceiver station in a mobile radio system, which has a digital modulator (20) for making available a signal containing a phase information, and a modulation closed loop (30) having a digital phase comparator (50) operating at baseband whose first input is connected to the output of the digital modulator (20). In addition, a controllable oscillator (80) is provided for generating an RF transmission signal at a controllable transmission frequency, a device (35) which is assigned to the controllable oscillator (80) and has the purpose of converting the RF transmission signal into a baseband signal containing a phase information. The output of the converter device (35) is connected here to a second input of the digital phase comparator (50). A GSM transmitter which has such a modulation closed loop (30) exhibits, in terms of its out-band noise and interference characteristics, significantly improved properties in comparison with a GSM transmitter which does not include a modulation loop.

公开(公告)号：DE602004000320T2

公开(公告)日：2006-08-10

申请号：DE602004000320

申请日：2004-04-29

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FISCHER GEORG ,  RITTER KAI-UWE

IPC: H03D7/00 ,  H04B1/30 ,  H03D3/00 ,  H04B1/26 ,  H04B7/155 ,  H04L27/20 ,  H04L27/22 ,  H04L27/36 ,  H04L27/38

Abstract: In a telecommunications transmitter and receiver two IQ-mixers are operated in 180 degrees phase shift. In both the transmitter and receiver, an input signal is coupled to each IQ-mixer and the output signal of the mixers are combined so as to cancel unwanted error components in each individual output signal. In the transmitter, residual carrier signals are cancelled, and in the receiver, DC-offsets are cancelled. In both, the wanted signals are added, doubling the amplitude of the resultant output signal leading to four times more output power and improved dynamic range.