公开(公告)号：DE69934706D1

公开(公告)日：2007-02-15

申请号：DE69934706

申请日：1999-10-12

Applicant: QUALCOMM INC

Inventor： BUTLER K ,  ZHANG HAITAO ,  TIEDEMANN G ,  ZOU QIUZHEN ,  SIH C ,  AGRAWAL AVNEESH

IPC: H04W24/02 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/7115 ,  H04W52/02

Abstract: A novel and improved method for performing paging is described. In one embodiment of the invention a searcher is used to detect spread spectrum signals. Samples received RF signals are stored in a sample buffer. During standby mode, the samples are gathered during paging slots assigned to the mobile. A set of searches are performed on the samples, and if pilot signals are detected additional demodulation is performed to detect paging messages. The resulting set of demodulation data may be combined to increase detection. After a page message has been detected, additional demodulation resources may be activated to processes more complete page messages, or other information channels. In one embodiment of the invention, the searcher includes a demodulator to perform quick page detection without the use of finger elements to reduce idle mode power consumption.

公开(公告)号：DE69934598D1

公开(公告)日：2007-02-08

申请号：DE69934598

申请日：1999-10-12

Applicant: QUALCOMM INC

Inventor： BUTLER K ,  ZHANG HAITAO ,  TIEDEMANN G

IPC: H04B1/707 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/7097 ,  H04W24/00 ,  H04W68/00 ,  H04W68/02 ,  H04W72/02

Abstract: A novel and improved method for performing paging is described. In one embodiment of the invention a searcher is used to detect spread spectrum signals. Samples received RF signals are stored in a sample buffer. During standby mode, the samples are gathered during paging slots assigned to the mobile. A set of searches are performed on the samples, and if pilot signals are detected additional demodulation is performed to detect paging messages. The resulting set of demodulation data may be combined to increase detection. After a page message has been detected, additional demodulation resources may be activated to processes more complete page messages, or other information channels. In one embodiment of the invention, the searcher includes a demodulator to perform quick page detection without the use of finger elements to reduce idle mode power consumption.

公开(公告)号：DE69934706T2

公开(公告)日：2007-10-18

申请号：DE69934706

申请日：1999-10-12

Applicant: QUALCOMM INC

Inventor： BUTLER K ,  ZHANG HAITAO ,  TIEDEMANN G ,  ZOU QIUZHEN ,  SIH C ,  AGRAWAL AVNEESH

IPC: H04W24/02 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/7115 ,  H04W52/02

Abstract: A novel and improved method for performing paging is described. In one embodiment of the invention a searcher is used to detect spread spectrum signals. Samples received RF signals are stored in a sample buffer. During standby mode, the samples are gathered during paging slots assigned to the mobile. A set of searches are performed on the samples, and if pilot signals are detected additional demodulation is performed to detect paging messages. The resulting set of demodulation data may be combined to increase detection. After a page message has been detected, additional demodulation resources may be activated to processes more complete page messages, or other information channels. In one embodiment of the invention, the searcher includes a demodulator to perform quick page detection without the use of finger elements to reduce idle mode power consumption.

公开(公告)号：DE60206419T2

公开(公告)日：2006-07-06

申请号：DE60206419

申请日：2002-12-03

Applicant: QUALCOMM INC

Inventor： BUTLER K ,  WOLF K ,  MILNE RYAN

IPC: H03M13/19 ,  H03M13/15 ,  H03M13/37

Abstract: Techniques for efficiently performing erasure-and-single-error correction block decoding on a received block of symbols previously coded column-wise with an (N, K) linear block code and row-wise with an error detection code (e.g., a CRC code). Initially, each row of the received block is marked as either an erased row or an un-erased row. To perform erasure-and-single-error correction block decoding on the received block, a codeword corresponding to a column of the received block containing an undetected symbol error is initially identified. The location of the symbol error in the codeword is then determined based on a particular block decoding scheme and corresponding to the selected (N, K) block code. The row of the received block containing the symbol error is then marked as an erased row. Block decoding may then be performed for the received block with the newly marked erased row containing the symbol error.

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.

公开(公告)号：DE60206419D1

公开(公告)日：2006-02-09

申请号：DE60206419

申请日：2002-12-03

Applicant: QUALCOMM INC

Inventor： BUTLER K ,  WOLF K ,  MILNE RYAN

IPC: H03M13/15 ,  H03M13/19 ,  H03M13/37

Abstract: Techniques for efficiently performing erasure-and-single-error correction block decoding on a received block of symbols previously coded column-wise with an (N, K) linear block code and row-wise with an error detection code (e.g., a CRC code). Initially, each row of the received block is marked as either an erased row or an un-erased row. To perform erasure-and-single-error correction block decoding on the received block, a codeword corresponding to a column of the received block containing an undetected symbol error is initially identified. The location of the symbol error in the codeword is then determined based on a particular block decoding scheme and corresponding to the selected (N, K) block code. The row of the received block containing the symbol error is then marked as an erased row. Block decoding may then be performed for the received block with the newly marked erased row containing the symbol error.

公开(公告)号：DE69616291T2

公开(公告)日：2002-07-25

申请号：DE69616291

申请日：1996-12-23

Applicant: QUALCOMM INC

Inventor： BUTLER K

IPC: H03G3/30 ,  H03F1/32 ,  H03G3/20

Abstract: A system for substantially eliminating nonlinear distortion, such as intermodulation products, introduced when a signal is processed by a nonlinear device. The system adds an out-of-band signal to an input signal to produce a combined signal having a power that substantially equals a nominal operating point power for a nonlinear device. Preferably, the instantaneous power of the out-of-band signal is adjusted by an automatic gain amplifier. The combined signal is input to the nonlinear device to produce an output. A filter processes the output of the nonlinear device to recover the information content of the original signal after processing by the nonlinear device. For example, if the nonlinear device is a power amplifier, the filtered output is an amplification of the input signal.

公开(公告)号：DE69429356D1

公开(公告)日：2002-01-17

申请号：DE69429356

申请日：1994-09-23

Applicant: QUALCOMM INC

Inventor： KINDRED RAY ,  BUTLER K ,  ZEHAVI EPHRAIM ,  WOLF KEIL

IPC: H04L1/12 ,  H03M13/23 ,  H03M13/37 ,  H03M13/41 ,  H04B1/707 ,  H04L1/00 ,  H04L1/08 ,  H04L1/20 ,  H04L25/02 ,  H04L25/03 ,  H04L25/08 ,  H04B7/26 ,  H03M13/00

Abstract: A Viterbi decoder for recovering the original bit data stream that was convolutionally encoded as a code symbol stream in a Code Division Multiple Access (CDMA) mobile communication system. The decoder simultaneously decodes at the several data rates associated with certain multirate vocoders. The decoder can decode at an unknown data rate in either continuous or framed packet modes. It accomplishes this by simultaneously decoding at multiple rates and by creating one or more data quality metrics for each decoded data packet. Special input and output buffering is provided to isolate the decoder from system timing constraints. The input buffer includes selection and accumulation logic to organize code symbol data into the packet order for repeat mode or random burst mode at lower frame data rates. Decoded data packets for each of several predetermined data transfer rates are held in an output buffer for about half of the decoding cycle, thereby permitting the system microprocessor to examine and select the appropriate decoded data packet. The decoder also can be reconfigured to operate at any one of several predetermined convolutional encoding algorithms. The Viterbi decoder, implemented as a single monolithic integrated circuit, can be used in any and all of many different multiuser telecommunications channels.

公开(公告)号：DE69616291D1

公开(公告)日：2001-11-29

申请号：DE69616291

申请日：1996-12-23

Applicant: QUALCOMM INC

Inventor： BUTLER K

IPC: H03G3/30 ,  H03F1/32 ,  H03G3/20

Abstract: A system for substantially eliminating nonlinear distortion, such as intermodulation products, introduced when a signal is processed by a nonlinear device. The system adds an out-of-band signal to an input signal to produce a combined signal having a power that substantially equals a nominal operating point power for a nonlinear device. Preferably, the instantaneous power of the out-of-band signal is adjusted by an automatic gain amplifier. The combined signal is input to the nonlinear device to produce an output. A filter processes the output of the nonlinear device to recover the information content of the original signal after processing by the nonlinear device. For example, if the nonlinear device is a power amplifier, the filtered output is an amplification of the input signal.

公开(公告)号：DE69605953D1

公开(公告)日：2000-02-10

申请号：DE69605953

申请日：1993-01-19

Applicant: QUALCOMM INC

Inventor： PADOVANI ROBERTO ,  TIEDEMANN G ,  WEAVER A ,  BUTLER K

IPC: C02F5/10 ,  H04L27/20 ,  C08L33/02 ,  C08L35/00 ,  C08L51/02 ,  C08L77/04 ,  C11D3/37 ,  H04B7/00 ,  H04J3/16 ,  H04J3/22 ,  H04J3/24 ,  H04J11/00 ,  H04J13/00 ,  H04J13/18 ,  H04L20060101 ,  H04L1/00 ,  H04L1/08 ,  H04L12/00 ,  H04L27/30 ,  H04L29/06 ,  H04Q7/38

Abstract: The invention relates to a communication system in which transmission takes place according to a format which permits different types of data to be combined and transmitted within a single transmission. The novel feature is that the communication system transmits variable length frames of data in packets, and that a data combining and transmission sub-system (14, 16, 18, 20) is provided so that when a frame of data does not require a complete packet for transmission, the data combining sub-system combines the frame of data with additional data to provide a complete packet. The data combining sub-system comprises input means for receiving the frame of data and the additional data and for combining the frame of data and the additional data to provide a complete packet responsive to a control signal, and control means for providing the control signal.