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    34.
    发明专利
    未知

    公开(公告)号：FI20001072A

    公开(公告)日：2000-08-01

    申请号：FI20001072

    申请日：2000-05-08

    Applicant: QUALCOMM INC

    Inventor： TIEDEMANN JR EDWARD G ,  WHEATLEY III CHARLES E ,  ODENWALDER JOSEPH P ,  LUNDBY STEIN A

    IPC: H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04B

    Abstract: A method and apparatus for providing diversity transmissions to a mobile unit from a transmitting station having at least first and second antennas by repeatedly switching between the two antennas during the transmission of information to the receiving unit. Message information is transmitted from the first antenna in the transmitting station to the receiving unit. After the start of the transmission of the message information from the first antenna, transmission of the message information from the first antenna to the receiving unit terminates and transmission of the message information from the second antenna in the transmitting station to the receiving unit is initiated. Some time after transmission of the message information from second antenna is initiated, the transmission of the message information from the second antenna to the receiving unit terminates and transmission of the message information from the first antenna in the transmitting station to the receiving unit is initiated. Repeated switching between the first and second antennas is achieved by repeating the process. The switching results in diversity transmissions that improve the ability of a receiving unit to receive the coded and interleaved transmitted message information from the transmitting station. The interleaver disperses the encoded symbols in each antenna dwell period such that the decoder decisions are based on a mix of symbols form each antenna. Therefore the decoder decisions are unreliable only when the mix of symbols from the different antennas, with different fading characteristics, are unreliable over the span of symbols the decoder uses in its decision process.

    35.
    发明专利
    未知

    公开(公告)号：NO20110662L

    公开(公告)日：2000-07-11

    申请号：NO20110662

    申请日：2011-05-04

    Applicant: QUALCOMM INC

    Inventor： CHEN TAO ,  WILLENEGGER SERGE ,  TIEDEMANN JR EDWARD G ,  ODENWALDER JOSEPH P

    IPC: H04L1/18 ,  H03M13/00 ,  H04L1/00 ,  H04L1/08

    Abstract: An efficient retransmission of data using symbol accumulation wherein the packet received in error is retransmitted at a lower energy-per-bit level concurrently in the same frame with the new packet. The destination device receives the data transmission and retransmission, demodulate the signal, and separates the received data into the new and retransmitted packet. The destination device then accumulates the energy of the retransmitted packet with the energy already accumulated for the packet received in error and decodes the accumulated packet. The accumulation of the additional energy provided by the subsequent retransmissions improves the probability of a correct decoding. The throughput rate can be improved since the packet received in error is retransmitted concurrently with the transmission of the new data packet. The capacity is maximized since the retransmission of the packet received in error is at a lower energy level than that of the new packet.

    36.
    发明专利
    未知

    公开(公告)号：NO20002805D0

    公开(公告)日：2000-05-31

    申请号：NO20002805

    申请日：2000-05-31

    Applicant: QUALCOMM INC

    Inventor： ODENWALDER JOSEPH P ,  WHEATLEY III CHARLES E ,  LUNDBY STEIN A ,  TIEDEMANN JR EDWARD G

    IPC: H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04B

    Abstract: A method and apparatus for providing diversity transmissions to a mobile unit from a transmitting station having at least first and second antennas by repeatedly switching between the two antennas during the transmission of information to the receiving unit. Message information is transmitted from the first antenna in the transmitting station to the receiving unit. After the start of the transmission of the message information from the first antenna, transmission of the message information from the first antenna to the receiving unit terminates and transmission of the message information from the second antenna in the transmitting station to the receiving unit is initiated. Some time after transmission of the message information from second antenna is initiated, the transmission of the message information from the second antenna to the receiving unit terminates and transmission of the message information from the first antenna in the transmitting station to the receiving unit is initiated. Repeated switching between the first and second antennas is achieved by repeating the process. The switching results in diversity transmissions that improve the ability of a receiving unit to receive the coded and interleaved transmitted message information from the transmitting station. The interleaver disperses the encoded symbols in each antenna dwell period such that the decoder decisions are based on a mix of symbols form each antenna. Therefore the decoder decisions are unreliable only when the mix of symbols from the different antennas, with different fading characteristics, are unreliable over the span of symbols the decoder uses in its decision process.

    37.
    发明专利
    未知

    公开(公告)号：NO20001424L

    公开(公告)日：2000-05-15

    申请号：NO20001424

    申请日：2000-03-17

    Applicant: QUALCOMM INC

    Inventor： WHEATLEY III CHARLES E ,  TIEDEMANN JR EDWARD G

    IPC: H04B7/26 ,  H04B1/7075 ,  H04B1/7077 ,  H04J3/06 ,  H04W56/00 ,  H04W92/20 ,  H04B1/707

    Abstract: In the present invention, the slave base station attains synchronization with the reference base station through messages transmitted from and received by a mobile station either in the soft handoff region between the reference base station and the slave base station or within a range which allows the mobile station to communicate with the slave base station. When the mobile station is not in communication with both the reference base station and the slave base station, then the round trip delay between the mobile station and the reference base station is measured by the reference base station. The reference base station communicates the PN code used by the mobile station over the reverse link to the slave base station. The slave base station acquires the signal from the mobile station and determines when the signal from the mobile station arrives. The slave base station then makes an estimate as to the length of the delay between transmission of a signal from the mobile station to the slave base station. Based upon these measurements and estimates, the slave base station determines the error which is present in the slave base station system time.

    38.
    发明专利
    未知

    公开(公告)号：NO20073891L

    公开(公告)日：2000-05-10

    申请号：NO20073891

    申请日：2007-07-24

    Applicant: QUALCOMM INC

    Inventor： TIEDEMANN JR EDWARD G ,  JOU YU-CHEUN ,  REZAIIFAR RAMIN

    IPC: H04W8/00 ,  E06C1/32 ,  E06C7/08 ,  E06C7/46 ,  E06C7/48 ,  H04B7/185 ,  H04B7/26 ,  H04J1/00 ,  H04W16/04 ,  H04W36/18 ,  H04W48/12 ,  H04W52/02 ,  H04W72/04 ,  H04W72/12 ,  H04W76/04

    Abstract: In a channel structure for use in communication systems, two sets of physical channels, one for the forward link (50) and another for the reverse link (52), are utilized to facilitate communication of a variety of logical channels. The physical channels comprise data and control channels. In the exemplary embodiment, the data channels comprise fundamental channels which are used to transmit voice traffic, data traffic, high speed data, and other overhead information and supplemental channels which are used to transmit high speed data. The fundamental channels can be released when the remote stations are idle to more fully utilize the available capacity. The control channels are used to transmit paging and control messages and scheduling information.

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