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    COMMUNICATION EQUIPMENT
    1.
    发明专利
    COMMUNICATION EQUIPMENT 失效

    公开(公告)号：JP2001217853A

    公开(公告)日：2001-08-10

    申请号：JP2000376209

    申请日：2000-12-11

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： AWATER GEERT ARNOUT ,  YAN RAN-HONG

    IPC: H04L29/04 ,  H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04W16/14 ,  H04W84/12 ,  H04W84/18 ,  H04W88/06 ,  H04W88/10 ,  H04L12/40 ,  H04L12/46 ,  H04Q7/38

    Abstract: PROBLEM TO BE SOLVED: To enable a single device to interface through both radio systems of the IEEE 802.11 and the Bluetooth. SOLUTION: This device includes a 1st radio system (e.g. Bluetooth system) operating within a 1st operation frequency range and a 2nd radio system (e.g. IEEE 802.11 system). At least a part of the 1st and 2nd frequency ranges is overlapped. The device has a control means 106 for controlling the 1st and 2nd radio systems so that only one radio system can perform transmission at a time. The control means 106 has a multiplexing means performing time multiple transmission from the 1st and 2nd radio system. The transmission of the IEEE 802.11 and the Bluetooth is multiplexed into a Bluetooth time slot.

    SIGNAL TRANSMISSION METHOD FOR OFDM TRANSMITTER
    2.
    发明专利
    SIGNAL TRANSMISSION METHOD FOR OFDM TRANSMITTER 失效

    公开(公告)号：JPH10303848A

    公开(公告)日：1998-11-13

    申请号：JP8784298

    申请日：1998-04-01

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： AWATER GEERT ARNOUT ,  VAN NEE RICHARD D J

    IPC: H04J11/00 ,  H04L27/26

    Abstract: PROBLEM TO BE SOLVED: To reduce a PAP ratio of a transmission signal efficiently at a low cost in the OFDM transmitter. SOLUTION: A data signal is coded by using a complementary code to reduce a PAP ratio of a transmission signal. A complementary carrier signal of the OFDM transmitter is efficiently generated at a low cost by combining the complementary coding and OFDM modulation and executing them simultaneously. A complementary coding OFDM modulation system 10 realizes it by utilizing the similarity of a mathematical structure used for the complementary coding and the OFDM modulation. Furthermore, it is possible to revise the complementary coding modulation system 10 to provide a scalability. Thus, the OFDM transmitter is operated under various transmission environment. A scalability function allows the operating parameter of the OFDM transmitter system or scaling of the characteristic.

    ORTHOGONAL FREQUENCY DIVISION MULTIPLEX DIGITAL COMMUNICATION SYSTEM USING COMPLEMENTARY CODE
    3.
    发明专利
    ORTHOGONAL FREQUENCY DIVISION MULTIPLEX DIGITAL COMMUNICATION SYSTEM USING COMPLEMENTARY CODE 失效

    公开(公告)号：JPH1084330A

    公开(公告)日：1998-03-31

    申请号：JP20319797

    申请日：1997-07-29

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： AWATER GEERT ARNOUT ,  KAMERMAN ADRIANNE ,  KRISHNAKUMAR ANJUR SUNDARESAN ,  VAN NEE DIDIER J R

    IPC: H04L27/36 ,  H04J11/00 ,  H04L27/26 ,  H04L27/38

    Abstract: PROBLEM TO BE SOLVED: To improve a peak versus average transmission output ratio by selecting a kernel cord consisting of a prescribed number of bits, generating a complementary code whose each bit corresponds to each bit of the kernel code, converting the complementary code into a complex vector and modulating a carrier. SOLUTION: An orthogonal frequency division modulation(OFDM) transmitter 100 receives a bit stream from a data bit source 25 and a coder 30 stores the stream once in an internal memory. The coder 30 selects a kernel code in, e.g. 8-bit, and a phase rotation θi independent of each bit is assigned as a prescribed conversion function and then a complementay code θi is generated. The coder 30 generates a complementary code θi by relating bits directly related to input data extracted from a memory to the phase rotation ψi for each of a prescribed number of groups. An IFFT processor 40 converts the complementary code θi into a code for a frequency area and each phase vector is generated. A transmitter 50 applies orthogonal frequency division modulation to the carrier by an analog-converted phase vector and transmits the result. A receiver 200 demodulates the signal by the reverse procedure to above.

    6.
    发明专利
    未知

    公开(公告)号：DE60043291D1

    公开(公告)日：2009-12-24

    申请号：DE60043291

    申请日：2000-05-05

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： AWATER GEERT ARNOUT ,  VAN NEE DIDIER JOHANNES RICHARD

    IPC: H04L25/03

    Abstract: The invention relates to a wireless radiofrequency data communication system comprising: €¢ a base-station comprising a multiple of N first groups and a signal processing-unit comprising memory means and processing means, wherein each first group comprises a receiver-unit provided with a receiver and at least one antenna which is connected to the receiver-unit, wherein the signal processing-unit is connected with each of the first groups for processing receive-signals generated by each of the first groups, and €¢ a multiple of M second groups for transmitting radiofrequency signals to the first groups, wherein each second group comprises a transmitter-unit provided with a transmitter and at least one antenna which is connected to the transmitter-unit, wherein the memory means of the signal processing-unit is provided with means comprising information about the transfer-functions of radiofrequency signals from each of the antennas of the second groups to each of the antennas of the first groups, and wherein the transmitters and receivers operate on essentially the same radiofrequency or radiofrequency-band.

    8.
    发明专利
    未知

    公开(公告)号：DE60030086T2

    公开(公告)日：2007-01-04

    申请号：DE60030086

    申请日：2000-01-20

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： AWATER GEERT ARNOUT ,  YAN RAN-HONG

    IPC: H04L12/28 ,  H04L69/14 ,  H04L12/56 ,  H04W16/14 ,  H04W84/12 ,  H04W84/18 ,  H04W88/06 ,  H04W88/10

    Abstract: The key of the invention is to introduce an interoperability device in a communication system which integrates an IEEE 802.11 transceiver and a Bluetooth transceiver. The device prevents that one transceiver is transmitting while the other is receiving, which would cause interference at the receiving transceiver. In addition, the device preferably prevents that both systems are transmitting at the same time to avoid interference at the receiving device(s). Optionally the device prohibits simultaneous reception of both transceivers. In that way the radio receiver can be shared between the devices, allowing a cheaper and smaller hardware design.

    9.
    发明专利
    未知

    公开(公告)号：DE69806669T2

    公开(公告)日：2003-04-03

    申请号：DE69806669

    申请日：1998-03-24

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： AWATER GEERT ARNOUT ,  VAN NEE RICHARD D J

    IPC: H04J11/00 ,  H04L27/26 ,  H04L1/12

    Abstract: The combined complementary encoder and modulation system for an OFDM transmitter system combines complementary coding and modulation and exploits the similarity of their mathematical structure to reduce implementation complexity. In doing so, the improved OFDM transmitter system uses complementary codes to reduce the power-to-average power (PAP) ratio of the transmitted signal. Additionally, the combined complementary encoder and modulation system can be modified to provide scaleablity, which allows a transmitter to operate in various transmission environments. More precisely, scaleability refers to the transmitter's capability to adapt the bit rate of the data, so as to satisfy varying signal bandwidth, delay spreads, tolerance and signal-to-noise ratio requirements.

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