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公开(公告)号：HK1020462A1
公开(公告)日：2000-04-20
申请号：HK99104089
申请日：1999-09-21
Applicant: QUALCOMM INC
Inventor： ODENWALDER JOSEPH 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：HK1018993A1
公开(公告)日：2000-03-31
申请号：HK99104046
申请日：1999-09-17
Applicant: QUALCOMM INC
Inventor： ODENWALDER JOSEPH P , JOU YU-CHEN , TIEDEMANN EDWARD G JR
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：NO20001153D0
公开(公告)日：2000-03-07
申请号：NO20001153
申请日：2000-03-07
Applicant: QUALCOMM INC
Inventor： TIEDEMANN JR EDWARD G , LUNDBY STEIN A , ODENWALDER JOSEPH P
IPC: H04B1/707 , H04B7/26 , H04J11/00 , H04J13/00 , H04J13/10 , H04W16/00 , H04W16/24 , H04W16/32 , H04W48/08 , H04W48/16 , H04J , H04B
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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公开(公告)号：CA2338769A1
公开(公告)日：2000-02-10
申请号：CA2338769
申请日：1999-07-27
Applicant: QUALCOMM INC
Inventor： KRISHNAMURTHI RAJEEV , ODENWALDER JOSEPH P , WHEATLEY CHARLES E III , TIEDEMANN EDWARD G JR
Abstract: A portable phone (236) may operate inexpensively as a cordless phone when in a micro-cell generated by a micro-base station (202), or flexibly as a cellula r phone when it leaves the micro-cell and is served in a macro-cell generated by macro-base station (204) operating on the same frequency. When a mobile phon e (222), served by the macro-base station (2042), drives by, the signals from the micro-base station (202) (intended for the portable phone 236) drown out the signals from the macro-base station (204). This invention solves the problem by having the micro-base station (202) receive, delay, and retransmi t (on a 50 % duty cycle -- half the time receiving and half retransmitting) al l signals transmitted by macro-base station (204), in addition to transmitting its own signal. The delay appears to the mobile station (222) as a resolvabl e multi-path delay, and it continues to be able to receive the signal intended for it.
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公开(公告)号：HK1019373A1
公开(公告)日：2000-02-03
申请号：HK99104094
申请日：1999-09-21
Applicant: QUALCOMM INC
Inventor： ODENWALDER JOSEPH P , BUTLER BRIAN K , TIEDEMANN EDWARD G JR , ZEHAVI EPHRAIM
IPC: H04J3/12 , H04J3/16 , H04J13/00 , H04L1/00 , H04L1/08 , H04L1/12 , H04L1/18 , H04L25/02 , H04L25/05 , H04J , H04L , H04B
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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Patent Agency Ranking
公开(公告)号：NO20070315L
公开(公告)日：1999-11-12
申请号：NO20070315
申请日：2007-01-17
Applicant: QUALCOMM INC
Inventor： ODENWALDER JOSEPH P
IPC: H04B1/7115
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公开(公告)号：BR9709482A
公开(公告)日：1999-08-10
申请号：BR9709482
申请日：1997-05-28
Applicant: QUALCOMM INC
Inventor： TIEDEMANN EDWARD G JR , JOU YU-CHEUN , ODENWALDER JOSEPH 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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公开(公告)号：AU1403599A
公开(公告)日：1999-06-07
申请号：AU1403599
申请日：1998-11-12
Applicant: QUALCOMM INC
Inventor： CHEN TAO , ODENWALDER JOSEPH P , TIEDEMANN EDWARD G JR , 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：CA2309932A1
公开(公告)日：1999-05-27
申请号：CA2309932
申请日：1998-11-12
Applicant: QUALCOMM INC
Inventor： TIEDEMANN EDWARD G JR , CHEN TAO , WILLENEGGER SERGE , ODENWALDER JOSEPH P
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：NO990758D0
公开(公告)日：1999-02-18
申请号：NO990758
申请日：1999-02-18
Applicant: QUALCOMM INC
Inventor： VIJAYAN RAJIV , ODENWALDER JOSEPH P , WOLF JACK K , ZEHAVI EPHRAIM , LEE CHONG U
IPC: H04N21/2315 , H03M13/15 , H03M13/25 , H03M13/27 , H03M13/29 , H03M13/31 , H03M13/45 , H04J11/00 , H04L1/00 , H04L27/26 , H04N20060101 , H04N21/2383 , H04N21/438 , H04L , H04J , H04N
Abstract: In an orthogonal frequency division multiplexing (OFDM) system which uses an outer Reed-Solomon encoder and interleaver an inner convolutional encoder, after the inner convolutional encoding the data bits are interleaved, and then grouped into symbols, each symbol having "m" bits. After grouping, the symbols are mapped to a complex plane using quadrature amplitude modulation (QAM). Thus, bits, not symbols, are interleaved by the inner interleaver. A receiver performs a soft decision regarding the value of each bit in each complex QAM symbol received.
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