Patents by Inventor Arthur J. Neufeld
Arthur J. Neufeld has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7190962Abstract: A method for correcting operation of the sleep oscillator (116) of a wireless communications device (100). Sleep oscillator frequency is estimated (412) so as to compensate for estimated temperature induced errors. In estimating temperature induced errors, errors (504) in sleep oscillator frequency are treated as being temperature induced errors (522), but probable multipath errors are bounded (410, 520) to predetermined sleep clock error maxima (602) corresponding to sleep duration over which the error occurred.Type: GrantFiled: April 1, 2004Date of Patent: March 13, 2007Assignee: Qualcomm IncorporatedInventors: Matthias Brehler, Arthur J. Neufeld, Jing Liu, John Charles May, Kurt W. Otte
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Patent number: 6993334Abstract: Techniques for avoiding handoff to a channel impaired due to frequency dependent fading, while minimizing idle mode signaling are disclosed. In one aspect, an access terminal determines the assigned channel on an access point and caches the channel. In another aspect, the access terminal replaces a default channel associated with an access point in a cache with the assigned channel. In yet another aspect, the access terminal uses the cached channel associated with an access point when measuring channel quality of neighbor access points for use in handoff determination. In yet another aspect, the access terminal hands off to the cached channel of a neighbor access point during handoff. Various other aspects are also presented. These aspects have the benefit of factoring in frequency dependent channel characteristics when making handoff decisions, thus avoiding handoff to an access point where the assigned channel may be impaired.Type: GrantFiled: April 30, 2002Date of Patent: January 31, 2006Assignee: Qualcomm Inc.Inventors: Don N. Andrus, Arthur J. Neufeld
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Patent number: 6973310Abstract: The mobile station is in the sleep mode until just prior to a designated slot. Upon wakeup, the mobile station ensures a link is maintained with the network by measuring the strength of several pilots. If a neighbor pilot is stronger than the current pilot, a handoff is performed. After handoff, the Control Channel Capsule (CCC) may be demodulated by the mobile station to obtain new overhead information, such as neighbor pilots. If no handoff is performed, the reacquisition slew for the current pilot is measured and fed back to the sleep controller to determine the next wake-up time. The mobile station then returns to sleep mode.Type: GrantFiled: November 11, 2002Date of Patent: December 6, 2005Assignee: Qualcomm Inc.Inventor: Arthur J. Neufeld
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Patent number: 6922435Abstract: Techniques to generate a pseudo-random number (PN) sequence at a desired phase using “masking” to adjust the phase of the PN sequence in coarse increments (e.g., 64-PN chip increments) to account for a large phase adjustment. Slewing may then be used to adjust the PN phase in fine increments (e.g., ? PN chip increments) to obtain the desired phase. Prior to each scan for the pilot from a particular base station, a PN mask corresponding to a phase closest to the start of a new search window is applied to a PN generator to obtain an initial phase for the PN sequence. From the initial phase obtained by the applied mask, the PN generator is then slewed to the start of the search window. The masking can be used to obtain a large phase adjustment in less time, which is likely to improve search performance.Type: GrantFiled: July 31, 2001Date of Patent: July 26, 2005Assignee: Qualcomm IncInventors: Arthur J. Neufeld, Ehren J. D. Van Melle, Eric Handojo
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Patent number: 6816474Abstract: Provided is a system and method for constructing a data message in a communications device including a processor configured to process sequentially transmitted messages. Each of the messages requires a predetermined number of data frames. The technique of the instant invention includes receiving portions of at least two of the transmitted messages in the processor. Each of the at least two received portions includes a subset of the predetermined number of data frames and excludes a remainder of the predetermined number of data frames. The subset of one of the received portions substantially matches the remainder of the other portion. Next, a determination is made as to whether a total number of the received subsets equals the predetermined number. Finally, a synthesized messaged is produced when the total number of the subsets is at least equal to the predetermined number. The synthesized message is formed of a combination of the subsets from each of the received portions.Type: GrantFiled: February 13, 2003Date of Patent: November 9, 2004Assignee: Qualcomm IncorporatedInventors: Inyup Kang, Mark D. Levin, Arthur J. Neufeld
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Publication number: 20040001515Abstract: Provided is a system and method for constructing a data message in a communications device including a processor configured to process sequentially transmitted messages. Each of the messages requires a predetermined number of data frames. The technique of the instant invention includes receiving portions of at least two of the transmitted messages in the processor. Each of the at least two received portions includes a subset of the predetermined number of data frames and excludes a remainder of the predetermined number of data frames. The subset of one of the received portions substantially matches the remainder of the other portion. Next, a determination is made as to whether a total number of the received subsets equals the predetermined number. Finally, a synthesized messaged is produced when the total number of the subsets is at least equal to the predetermined number. The synthesized message is formed of a combination of the subsets from each of the received portions.Type: ApplicationFiled: February 13, 2003Publication date: January 1, 2004Inventors: Inyup Kang, Mark D. Levin, Arthur J. Neufeld
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Publication number: 20040002333Abstract: The mobile station is in the sleep mode until just prior to a designated slot. Upon wakeup, the mobile station ensures a link is maintained with the network by measuring the strength of several pilots. If a neighbor pilot is stronger than the current pilot, a handoff is performed. After handoff, the Control Channel Capsule (CCC) may be demodulated by the mobile station to obtain new overhead information, such as neighbor pilots. If no handoff is performed, the reacquisition slew for the current pilot is measured and fed back to the sleep controller to determine the next wake-up time. The mobile station then returns to sleep mode.Type: ApplicationFiled: November 11, 2002Publication date: January 1, 2004Inventor: Arthur J. Neufeld
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Publication number: 20030203735Abstract: Techniques for avoiding handoff to a channel impaired due to frequency dependent fading, while minimizing idle mode signaling are disclosed. In one aspect, an access terminal determines the assigned channel on an access point and caches the channel. In another aspect, the access terminal replaces a default channel associated with an access point in a cache with the assigned channel. In yet another aspect, the access terminal uses the cached channel associated with an access point when measuring channel quality of neighbor access points for use in handoff determination. In yet another aspect, the access terminal hands off to the cached channel of a neighbor access point during handoff. Various other aspects are also presented. These aspects have the benefit of factoring in frequency dependent channel characteristics when making handoff decisions, thus avoiding handoff to an access point where the assigned channel may be impaired.Type: ApplicationFiled: April 30, 2002Publication date: October 30, 2003Inventors: Don N. Andrus, Arthur J. Neufeld
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Patent number: 6639907Abstract: Techniques to process data sporadically transmitted at designated times in a wireless communication system, such as paging indicator (PI) bits on the quick paging channel in cdma2000. These techniques support a sleep cycle that may start at virtually anytime and having a sleep duration selected based on a fine time increment. The increment is selected such that the finger processors and symbol combiner of a rake receiver may be easily moved to the proper positions upon waking up from a sleep. Techniques are also provided to align the symbol combiner timing to that of a particular multipath in the received signal, if necessary. With these techniques, a terminal may perform a sleep between a pair of assigned PI bits and may wake up and process a single PI bit.Type: GrantFiled: September 14, 2001Date of Patent: October 28, 2003Assignee: Qualcomm, IncorporatedInventors: Arthur J. Neufeld, Ehren Van Melle, De-Gang Richard Yao
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Patent number: 6590886Abstract: The present invention is an improved method and circuit for reducing the amount of time a mobile receiver spends in the active phase of a slot in a communications system utilizing a slotted paging mechanism. The invention allows the awake time to be configured for the minimum interval needed to demodulate the paging channel messages of interest. The invention includes a means to adjust the timing reference of the fingers to compensate for a sleep duration not an integral multiple of the PN sequence period, and a means to adjust the deinterleaver frame reference timing to compensate for a sleep duration not an integral multiple of the frame interval, and a means to initialize the frequency tracking, gain scaling, and DC bias loops, if any, of the analog receiver chain to minimize the time needed to re-lock these loops.Type: GrantFiled: July 17, 1998Date of Patent: July 8, 2003Assignee: Qualcomm, IncorporatedInventors: Kenneth D. Easton, Arthur J. Neufeld
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Publication number: 20020093920Abstract: Techniques to process data sporadically transmitted at designated times in a wireless communication system, such as paging indicator (PI) bits on the quick paging channel in cdma2000. These techniques support a sleep cycle that may start at virtually anytime and having a sleep duration selected based on a fine time increment. The increment is selected such that the finger processors and symbol combiner of a rake receiver may be easily moved to the proper positions upon waking up from a sleep. Techniques are also provided to align the symbol combiner timing to that of a particular multipath in the received signal, if necessary. With these techniques, a terminal may perform a sleep between a pair of assigned PI bits and may wake up and process a single PI bit.Type: ApplicationFiled: September 14, 2001Publication date: July 18, 2002Inventors: Arthur J. Neufeld, Ehren Van Meller, De-Gang Richard Yao
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Publication number: 20020067762Abstract: Techniques to generate a pseudo-random number (PN) sequence at a desired phase using “masking” to adjust the phase of the PN sequence in coarse increments (e.g., 64-PN chip increments) to account for a large phase adjustment. Slewing may then be used to adjust the PN phase in fine increments (e.g., ⅛ PN chip increments) to obtain the desired phase. Prior to each scan for the pilot from a particular base station, a PN mask corresponding to a phase closest to the start of a new search window is applied to a PN generator to obtain an initial phase for the PN sequence. From the initial phase obtained by the applied mask, the PN generator is then slewed to the start of the search window. The masking can be used to obtain a large phase adjustment in less time, which is likely to improve search performance.Type: ApplicationFiled: July 31, 2001Publication date: June 6, 2002Inventors: Arthur J. Neufeld, Ehren J.D. Van Melle, Eric Handojo