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公开(公告)号：DE69934496T2
公开(公告)日：2007-09-27
申请号：DE69934496
申请日：1999-07-27
Applicant: QUALCOMM INC
Inventor： WHEATLEY E , TIEDEMANN G , ODENWALDER P , KRISHNAMURTHI RAJEEV
Abstract: A method and system for operation of a personal base station where the forward link of a personal base station is on the same frequency assignment as a first forward link data signal transmitted by a macro base station belonging to a cellular communication system. A first subscriber station communicates with the macro base station. The personal base station generates a second forward link data signal and communicates with a second subscriber station. The personal base station receives the first forward link data signal and combines it with its own second forward link data signal to form a combined forward link data signal. The personal base station then transmits the combined forward link data signal. The first subscriber station is able to receive and diversity combine the combined forward link data signal, improving the signal to noise ratio that would otherwise occur in the vicinity of the personal base station.
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公开(公告)号：DE69836097D1
公开(公告)日：2006-11-16
申请号：DE69836097
申请日：1998-11-30
Applicant: QUALCOMM INC
Inventor： ODENWALDER P , LUNDBY A , WHEATLEY E , TIEDEMANN G
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.
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公开(公告)号：DE69832930T2
公开(公告)日：2006-08-24
申请号：DE69832930
申请日：1998-02-10
Applicant: QUALCOMM INC
Inventor： TIEDEMANN G , LIN YU-CHUAN , JOU YU-CHEUN , ODENWALDER P
IPC: H04L29/06 , H04B7/005 , H04B7/26 , H04L29/08 , H04W28/18 , H04W28/20 , H04W28/22 , H04W52/28 , H04W52/34 , H04W72/04 , H04W72/12
Abstract: In a communication system capable of variable rate transmission, scheduling of high speed data transmission improves utilization of the forward link and decreases the transmission delay in data communication. Each remote station is assigned one primary code channel for the duration of the communication with a cell. Secondary code channels of various types and transmission capabilities can be assigned by a channel scheduler for scheduled transmission of data traffic at high rates. Secondary code channels are assigned in accordance with a set of system goals, a list of parameters, and collected information on the status of the communication network. Secondary code channels can be grouped into sets of secondary code channels. Data is partitioned in data frames and transmitted over the primary and secondary code channels which have been assigned to the scheduled user.
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公开(公告)号：DE69734652T2
公开(公告)日：2006-07-27
申请号：DE69734652
申请日：1997-05-28
Applicant: QUALCOMM INC
Inventor： TIEDEMANN G , JOU YU-CHEUN , ODENWALDER P
Abstract: The present invention is a method and apparatus for transmitting a high rate data packet in a CDMA communication system. The transmission system transmits a first channel assignment message indicating the at least one additional channel that will be used to support the high rate data packet. The first channel assignment message is sent in advance of the onset of high rate data communications. In addition the present invention provides within the first frame of high rate data a duplicate channel assignment message. A remote receiver uses the channel assignment messages to initialize its demodulation elements to receive the additional information carried on the at least one additional channel.
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Patent Agency Ranking
公开(公告)号：DE69832930D1
公开(公告)日：2006-02-02
申请号：DE69832930
申请日：1998-02-10
Applicant: QUALCOMM INC
Inventor： TIEDEMANN G , LIN YU-CHUAN , JOU YU-CHEUN , ODENWALDER P
IPC: H04L29/06 , H04B7/005 , H04B7/26 , H04L29/08 , H04W28/18 , H04W28/20 , H04W28/22 , H04W52/28 , H04W52/34 , H04W72/04 , H04W72/12
Abstract: In a communication system capable of variable rate transmission, scheduling of high speed data transmission improves utilization of the forward link and decreases the transmission delay in data communication. Each remote station is assigned one primary code channel for the duration of the communication with a cell. Secondary code channels of various types and transmission capabilities can be assigned by a channel scheduler for scheduled transmission of data traffic at high rates. Secondary code channels are assigned in accordance with a set of system goals, a list of parameters, and collected information on the status of the communication network. Secondary code channels can be grouped into sets of secondary code channels. Data is partitioned in data frames and transmitted over the primary and secondary code channels which have been assigned to the scheduled user.
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公开(公告)号：DE69733019D1
公开(公告)日：2005-05-19
申请号：DE69733019
申请日：1997-05-28
Applicant: QUALCOMM INC
Inventor： ODENWALDER P , BUTLER K , TIEDEMANN G , ZEHAVI EPHRAIM
IPC: H04J3/12 , H04J3/16 , H04J13/00 , H04L1/00 , H04L1/08 , H04L1/12 , H04L1/18 , H04L25/02 , H04L25/05 , H04B1/707
Abstract: A novel and improved method and apparatus for generating a constant data rate channel supporting signaling data transmission in an adjustable rate wireless communication system is described. In accordance with one aspect of the invention the rate at which the channel operates may be adjusted based on the particular use and environmental conditions such that the appropriate data rate up to a maximum capability can be achieved. User data is then placed into frames based on the selected rate. When available, signaling data is added into each frames in a predetermined amount. The resulting frame is encoded, repeated and punctured based on the selected rate and whether signaling data has been introduced, and transmitted via RF signals to the receive system. Upon reception, the frame is processed in accordance with having only user data and with having signaling data. That is, the frame is processed both as if it had signaling data and as if no signaling data were present. Once the frame is processed, the particular processing that is more likely to be correct is determined via error checking. If the signaling data processed frame is more likely to have be correct, the signaling data is separated from the user data and each processed accordingly. If the non-signaling data processing is determined to be more likely to be correct, the frame is processed as if it were entirely comprised of user data.
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公开(公告)号：DE69729296T2
公开(公告)日：2005-05-12
申请号：DE69729296
申请日：1997-05-28
Applicant: QUALCOMM INC
Inventor： ODENWALDER P , JOU YU-CHEN , TIEDEMANN G
Abstract: A method for demodulating a received signal comprising complex multiplying (202,204) the received signal by a complex pseudonoise code to produce a complex pseudonoise despread signal (XI,XQ); filtering (214) the complex pseudonoise despread signal to provide a complex filtered pilot signal; multiplying (210) the complex pseudo-noise despread signal by a first demodulation code to provide a first complex demodulated data signal; and phase rotating and scaling (216,218) the first complex demodulated clara signal in accordance with the complex-filtered pilot signal to provide a first soft decision data.
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公开(公告)号：DE69633005D1
公开(公告)日：2004-09-02
申请号：DE69633005
申请日：1996-03-29
Applicant: QUALCOMM INC
Inventor： TIEDEMANN G , ODENWALDER P , WHEATLEY E , PADOVANI ROBERTO
IPC: H04B7/26 , H04B1/06 , H04B7/00 , H04B7/005 , H04B17/00 , H04W52/08 , H04W52/22 , H04W52/24 , H04W52/28 , H04W52/36 , H04W52/60 , H05K11/02
Abstract: A method and apparatus for controlling transmission power in a mobile communication system is disclosed. The method disclosed provides for a closed-loop power control method. A characteristic of a propagation path between a first communication station and a second communication station is determined and a power control step size selected accordingly. Closed loop power control commands are received at the first communication station and its transmission energy is adjusted in accordance with the closed loop power control commands and the power control step size.
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