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Inventor:
Terasawa; Daisuke
Address:
San Diego, CA
No. of patents:
25
Patents:












Patent Number Title Of Patent Date Issued
8244256 Method and apparatus in a CDMA communication system August 14, 2012
A novel and improved method and apparatus, in a WCDMA communication system (100), for informing a mobile station (101) of a downlink data frame time offset by determining the downlink data frame time offset, and transmitting the downlink data frame time offset via an Active Set Update
7965688 Signal splitting method for limiting peak power in a CDMA system June 21, 2011
The invention is a method for limiting the peak transmit power in a CDMA communication system. At least one of first and second high transmit power regions are separated into a plurality of high transmit power subregions. The high transmit power subregions of the plurality of high su
7756085 Steps one and three W-CDMA and multi-mode searching July 13, 2010
Techniques for efficient searching in asynchronous systems, such as W-CDMA, as well as multi-mode searching, are disclosed. In one aspect, step one and step three search are performed in a single search engine. In another aspect, a search engine is configurable to search the offsets
7492754 Method and apparatus in a CDMA communication system February 17, 2009
A novel and improved method and apparatus, in a WCDMA communication system, for informing a mobile station of a downlink data frame time offset by determining the downlink data frame time offset, and transmitting the downlink data frame time offset via an Active Set Update message tr
7420947 Communication system performance using position location information September 2, 2008
A method and apparatus for using information about a mobile terminal's location relative to a base station can improve performance of a communication system. In addition, information about the mobile terminal's velocity relative to the base station may be used to improve performance
7391753 Method for handoff between an asynchronous CDMA base station and a synchronous CDMA base station June 24, 2008
An improved method for facilitating handoff between an asynchronous and a synchronous base station. A method for determining a pilot channel PN offset of a pilot channel transmitted by a wireless base station. In a first embodiment, the method includes correlating a PN sequence with a
7254118 Method and apparatus in a CDMA communication system August 7, 2007
A novel and improved method and apparatus, in a WCDMA communication system (100), for informing a mobile station (101) of a downlink data frame time offset by determining the downlink data frame time offset, and transmitting the downlink data frame time offset via an Active Set Update
7251225 Signal splitting method for limiting peak power in a CDMA system July 31, 2007
The invention is a method for limiting the peak transmit power in a CDMA communication system. At least one of first and second high transmit power regions are separated into a plurality of high transmit power subregions. The high transmit power subregions of the plurality of high su
7082109 Signal splitting method for limiting peak power in a CDMA system July 25, 2006
The invention is a method for limiting the peak transmit power in a CDMA communication system. At least one of first and second high transmit power regions are separated into a plurality of high transmit power subregions. The high transmit power subregions of the plurality of high su
7012911 Method and apparatus for W-CDMA modulation March 14, 2006
Techniques for efficient W-CDMA modulation are disclosed. In one aspect, a multiplexing/coding chain for use in modulation such as that defined by the W-CDMA specification is disclosed. In another aspect, transport blocks are processed and concatenated, utilizing memory efficiently. This
6982971 Method and system for handoff between an asychronous CDMA base station and a synchronous CDMA ba January 3, 2006
A method and system that enables faster acquisition of the forward link signal of a target base station in a mixed network of synchronous and asynchronous base stations is disclosed. The serving base station transmits in a neighbor list an estimated timing error 417 between the servi
6965589 Time offset technique for increasing the capacity of a CDMA system November 15, 2005
The invention is a method for limiting the peak transmit power in a CDMA communication system including the steps transmitting a first communication signal having a first high transmit power region and transmitting a second communication signal having a second high transmit power reg
6879576 Method and apparatus for processing a physical channel with partial transport format information April 12, 2005
Techniques for recovering data transmitted on a physical channel in which the channelization code is not known at the time of the data recovery. A modulated signal is received an processed to provide received samples. A hypothesized channelization code (e.g., an OVSF code in the W-CDMA s
6873647 Method and system for reducing synchronization time in a CDMA wireless communication system March 29, 2005
A method and system for generating forward link channels in a synchronous CDMA base station having a pilot pseudonoise (PN) sequence with a pilot PN sequence offset. In one embodiment the method includes the steps of generating a sync channel including a sync channel message; generating
6768768 Method and apparatus for step two W-CDMA searching July 27, 2004
Techniques for searching in asynchronous systems are disclosed. In one aspect, a plurality of codes, such as SSCs, are correlated with a received signal at a plurality of offsets to produce a code/slot energy corresponding to each code/slot boundary pair. Unique subsets of the code/s
6765887 Method and apparatus for processing a received transmission based on processing delays requireme July 20, 2004
Techniques for processing transmissions in a communications (e.g., CDMA) system. Samples are received and assembled into one or more traffics, with each traffic including one or more portions (e.g., radio frames, coded blocks) suitable for processing independently. The priority of each
6735606 Multi-sequence fast slewing pseudorandom noise generator May 11, 2004
Techniques for fast-slewing of multi-sequence based PN generators are disclosed. In one aspect, LFSR states and reference counter states are loaded into their corresponding components such that consistency among the states is maintained. In another aspect, various methods for determining
6724739 Method for handoff between an asynchronous CDMA base station and a synchronous CDMA base station April 20, 2004
An improved method for facilitating handoff between an asynchronous and a synchronous base station. A method for determining a pilot channel PN offset of a pilot channel transmitted by a wireless base station. In a first embodiment, the method includes correlating a PN sequence with a
6624767 Data buffer structure for asynchronously received physical channels in a CDMA system September 23, 2003
A receiver unit for use in a CDMA system and including a channel processor, a buffer, and a data processor. The channel processor processes samples for one or more physical channels for each time interval to provide symbols. The buffer is operated as a number of memory banks. Each memory
6456606 Handoff control in an asynchronous CDMA system September 24, 2002
In a CDMA system in which the base stations are not each time aligned with one another, the handoff process accommodates the handoff by allowing for frame alignment. For example, frame alignment may be accomplished through the use of a selected set or may be remote unit aligned without r
6396817 Signal splitting method for limiting peak power in a CDMA system May 28, 2002
The invention is a method for limiting the peak transmit power in a CDMA communication system. At least one of first and second high transmit power regions are separated into a plurality of high transmit power subregions. The high transmit power subregions of the plurality of high subreg
6393010 Time offset technique for increasing the capacity of a CDMA system May 21, 2002
A method for limiting the peak transmit power in a CDMA communication system including the steps transmitting a first communication signal having a first high transmit power region and transmitting a second communication signal having a second high transmit power region. One of the f
6385264 Method and apparatus for mitigating interference between base stations in a wideband CDMA system May 7, 2002
A method for mitigating the effect of interference between a first base station and a second base station, the first base station and second base stations both sharing a same primary synchronization code. The method includes generating a primary synchronization channel having the primary
6310869 Method and apparatus for reducing amplitude variations and interference in communication signals October 30, 2001
Several methods and corresponding apparatus reduce peak to average power in signals transmitted in a wireless communications system, particularly with respect to pilot symbols transmitted from a base station to several user stations. A large peak to average amplitude of inserted pilot sy
6246673 Method and system for handoff between an asynchronous CDMA base station and a synchronous CDMA b June 12, 2001
A method and system that enables faster acquisition of the forward link signal of a target base station in a mixed network of synchronous and asynchronous base stations is disclosed. The serving base station transmits in a neighbor list an estimated timing error 417 between the servi










 
 
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