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公开(公告)号：DE69733019T2
公开(公告)日：2006-02-16
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
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：DE69633005T2
公开(公告)日：2005-07-21
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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公开(公告)号：DE69732357D1
公开(公告)日：2005-03-03
申请号：DE69732357
申请日：1997-06-09
Applicant: QUALCOMM INC
Inventor： ODENWALDER P
Abstract: A novel and improved method and apparatus for high rate CDMA wireless communication is described. In accordance with one embodiment of the invention, a set of individually gain adjusted subscriber channels are formed via the use of a set of orthogonal subchannel codes having a small number of PN spreading chips per orthogonal waveform period. Data to be transmitted via one of the transmit channels is low code rate error correction encoded and sequence repeated before being modulated with one of the subchannel codes, gain adjusted, and summed with data modulated using the other subchannel codes. The resulting summed data is modulated using a user long code and a pseudorandom spreading code (PN code) and upconverted for transmission. The use of the short orthogonal codes provides interference suppression while still allowing extensive error correction coding and repetition for time diversity to overcome the Raleigh fading commonly experienced in terrestrial wireless systems. In the exemplary embodiment of the invention provided, the set of sub-channel codes are comprised of four Walsh codes, each orthogonal to the remaining set and four chips in duration. The use of four sub-channels is preferred as it allows shorter orthogonal codes to be used, however, the use of a greater number of channels and therefore longer codes is consistent with the invention. In a preferred exemplary embodiment of the invention, pilot data is transmitted via a first one of the transmit channels and power control data transmitted via a second transmit channel. The remaining two transmit channels are used for transmitting non-specified digital data including user data or signaling data, or both. In an exemplary embodiment, one of the two non-specified transmit channels is configured for BPSK modulation and transmission over the quadrature channel.
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公开(公告)号：DE60019137T3
公开(公告)日：2011-06-01
申请号：DE60019137
申请日：2000-08-11
Applicant: QUALCOMM INC
Inventor： SARKAR SANDIP , TIEDEMANN G , ODENWALDER P
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公开(公告)号：DE69837044T2
公开(公告)日：2007-11-22
申请号：DE69837044
申请日：1998-09-08
Applicant: QUALCOMM INC
Inventor： LUNDBY A , ODENWALDER P , TIEDEMANN G
IPC: H04J11/00 , H04B1/707 , H04B7/26 , H04J13/00 , H04J13/10 , H04W16/00 , H04W16/24 , H04W16/32 , H04W48/08 , H04W48/16
Abstract: A method and apparatus for providing orthogonal spot beams (14a, 14b), sectors (16a, 16b), and picocells (18). The transmissions can be made orthogonal by using orthogonal auxiliary pilots and different Walsh traffic channels in adjacent areas. In accordance with the IS-95 standard, the pilot signal is covered with the 64-chip Walsh sequence zero. The 64-chip all zeros Walsh sequence can be designated as P and the 64-chip all one sequence can be designated as M. In the present invention, additional pilot signals can be provided by concatenating 64-chip all zeros P and all ones M sequences. Thus, for two pilot signals, pilot Walsh sequences of PP and PM can be used. For four pilot signals, pilot Walsh sequences of PPPP, PMPM, PPMM, and PMMP can be used. The present invention can be extended such that any required number of pilot Walsh sequences can be generated by substituting each bit in an K-bit Walsh sequence with the 64-chip all zeros P or all ones M sequence depending on the value of that bit.
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Patent Agency Ranking
公开(公告)号：DE69836097T2
公开(公告)日：2007-05-16
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：DE69835447T2
公开(公告)日：2007-02-15
申请号：DE69835447
申请日：1998-11-12
Applicant: QUALCOMM INC
Inventor： CHEN TAO , ODENWALDER P , TIEDEMANN G , WILLENEGGER SERGE
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.
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公开(公告)号：DE69934496D1
公开(公告)日：2007-02-01
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：DE69732357T2
公开(公告)日：2006-05-11
申请号：DE69732357
申请日：1997-06-09
Applicant: QUALCOMM INC
Inventor： ODENWALDER P
Abstract: A novel and improved method and apparatus for high rate CDMA wireless communication is described. In accordance with one embodiment of the invention, a set of individually gain adjusted subscriber channels are formed via the use of a set of orthogonal subchannel codes having a small number of PN spreading chips per orthogonal waveform period. Data to be transmitted via one of the transmit channels is low code rate error correction encoded and sequence repeated before being modulated with one of the subchannel codes, gain adjusted, and summed with data modulated using the other subchannel codes. The resulting summed data is modulated using a user long code and a pseudorandom spreading code (PN code) and upconverted for transmission. The use of the short orthogonal codes provides interference suppression while still allowing extensive error correction coding and repetition for time diversity to overcome the Raleigh fading commonly experienced in terrestrial wireless systems. In the exemplary embodiment of the invention provided, the set of sub-channel codes are comprised of four Walsh codes, each orthogonal to the remaining set and four chips in duration. The use of four sub-channels is preferred as it allows shorter orthogonal codes to be used, however, the use of a greater number of channels and therefore longer codes is consistent with the invention. In a preferred exemplary embodiment of the invention, pilot data is transmitted via a first one of the transmit channels and power control data transmitted via a second transmit channel. The remaining two transmit channels are used for transmitting non-specified digital data including user data or signaling data, or both. In an exemplary embodiment, one of the two non-specified transmit channels is configured for BPSK modulation and transmission over the quadrature channel.
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公开(公告)号：DE69533665D1
公开(公告)日：2004-11-25
申请号：DE69533665
申请日：1995-07-05
Applicant: QUALCOMM INC
Inventor： TIEDEMANN G , GILHOUSEN S , ODENWALDER P , ZEHAVI EPHRAIM , LEVIN A , WHEATLEY E
Abstract: A method and apparatus for controlling transmission power in a variable rate communication system is disclosed. The method disclosed provides for a closed loop power control method. A first remote station controls the transmission power of a second remote station by transmitting a rate dependent power control signal to the second remote communication station. Since only the second communication knows its transmission rate a priori, it must determine its course of action in accordance with both the received power control signal and the knowledge of its transmission rate.
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