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| Number | Title | Issue Date |
| 7165025 | Auditory-articulatory analysis for speech quality assessment Auditory-articulatory analysis for use in speech quality assessment. Articulatory analysis is based on a comparison between powers associated with articulation and non-articulation frequency ranges of a speech signal. Neither source speech nor an estimate of the sou... | 01/16/2007 |
| 7161956 | Adapative quality control loop for link rate adaptation in data packet communications An adaptive quality control loop for link rate adaptation that adaptively selects optimal channel condition thresholds in real-time without measuring all the factors that affect selecting channel condition thresholds. The adaptive quality control loop involves adjus... | 01/09/2007 |
| 7058389 | Method for processing emergency calls initiated by wireless phones Disclosed is a method of communicating emergency call information originating from wireless phones among multiple entities using a set of network signaling operations for pooling and reconciling records of emergency calls and identifications for sources of fraudulen... | 06/06/2006 |
| 7042955 | Space time spreading and phase sweep transmit diversity Described herein is a method and apparatus for transmission that provides the performance of space time spreading (STS) or orthogonal transmit diversity (OTD) and the backwards compatibility of phase sweep transmit diversity (PSTD) without significantly degrading pe... | 05/09/2006 |
| 7035599 | Biased phase sweep transmit diversity Disclosed is a method and apparatus of transmit diversity that is backward compatible and does not significantly degrade performance in additive white guassan noise (AWGN) conditions using a transmission architecture that incorporates a form of phase sweep transmit ... | 04/25/2006 |
| 6980778 | Split shift phase sweep transmit diversity Disclosed is a method and apparatus of transmit diversity that is backward compatible and does not degrade performance using a transmission architecture that incorporates a form of phase sweep transmit diversity (PSTD) referred to herein as split shift PSTD. Split s... | 12/27/2005 |
| 6965760 | Satellite-based location system employing dynamic integration techniques A method and apparatus for facilitating detection of satellite signals using a dynamic integration technique in which integration time periods of correlators are adjusted according to signal strength measurements of satellite signals received at GPS receivers. Speci... | 11/15/2005 |
| 6950664 | Geolocation using enhanced timing advance techniques A method of geolocation that is backward compatible and more accurate than the well-known Cell/Sector ID method is provided. The geolocation method provided comprises the steps of determining a set of candidate locations for the mobile-station based on a timing adva... | 09/27/2005 |
| 6930990 | Serial communications link for a base stations Disclosed is an interface and method for data transmission between digital and radio frequency (RF) components of a base station. The interface and method involves transmitting transmit or receive data over a first set of time slots and transmitting various uplink o... | 08/16/2005 |
| 6920314 | Symmetric sweep phase sweep transmit diversity Described herein is a method and apparatus for transmission that provides the performance of space time spreading (STS) or orthogonal transmit diversity (OTD) and the backwards compatibility of phase sweep transmit diversity (PSTD) without degrading performance of e... | 07/19/2005 |
| 6920150 | Adaptive communications transcoding and error control The present invention is a method for improving data transfer performance over communications networks connecting data networks and users using adaptive communications formatting. Adaptive communications formatting includes encoding (or compressing) the data and app... | 07/19/2005 |
| 6915477 | Delay sensitive adaptive quality control loop for rate adaptation An adaptive quality control loop for link rate adaptation that selectively adjusts channel condition thresholds based on delay sensitivity of data packets being transmitted. For wireless communication systems incorporating an error correction scheme using re-transmi... | 07/05/2005 |
| 6859446 | Integrating power-controlled and rate-controlled transmissions on a same frequency carrier Disclosed is a method of integrating voice and data services onto a same frequency channel using available transmit power information to determine data rates, wherein the available transmit power information indicates an amount of transmit power available for future... | 02/22/2005 |
| 6839569 | Mobile radio equipment with yoke antenna Mobile radio equipment (cell phone) with two individual antennas (21, 22), which are shaped by means of a non-conducting intermediate piece (23) into a yoke, which can be used to suspend the cell phone, for example on a charging equipment (3) or... | 01/04/2005 |
| 6810243 | Surrogate service attendant Disclosed is a surrogate service attendant for ensuring invocation of services subscribed to by users of mobile-terminal equipment which are unattached or unregistered. When a call for an unattached/unregistered user mobile-telephone equipment (UE) is received by a ... | 10/26/2004 |
| 6640104 | Dynamic channel assignment for intelligent antennas Disclosed is a method for improving call quality and capacity by integrating a dynamic channel allocation technique into an intelligent antenna system. The intelligent antenna systems includes beams which are grouped into sets, wherein each set has associ... | 10/28/2003 |
| 6594226 | Apparatus and method of enhancing transmit diversity Disclosed is a method and apparatus for enhancing diversity gain without reducing data rate by increasing the number of antenna elements and configuring the antenna elements for improving signal-to-noise ratio at a receiver. The antenna array comprise a f... | 07/15/2003 |
| 6535738 | Method for optimizing a number of communication links Disclosed is a method for improving system capacity without compromising soft handoff by optimizing the number of communication links used in soft handoff. The number of communication links used in soft handoff are optimized by minimizing the number of ba... | 03/18/2003 |
| 6518918 | Wireless assisted altitude measurement Disclosed is a communication device and method for estimating a more accurate vertical position or altitude of a communication device using atmospheric pressure measurements. In one embodiment, a first communication device comprises a pressure sensor for ... | 02/11/2003 |
| 6504517 | Variable sectorization tower top applique for base stations An apparatus and method of adaptive sectorization that is amiable to CDMA environments using an antenna configuration and a phase shifter network that can form a variable width beam over which a pilot signal and other downlink signals may be transmitted. ... | 01/07/2003 |
| 6504827 | Discontinuous transmission on high speed data channels The present invention is a method for efficiently utilizing spectrum resources belonging to a wireless communications system in the presence of data channels through a discontinuous data transmission technique. The discontinuous data transmission techniqu... | 01/07/2003 |
| 6493553 | Mobile-station adapted for removable user identity modules A mobile-station with an integrated user identity module (I-UIM) and a removable user identity module (R-UIM) that adheres to the second generation standard intersystem protocol for validation and authentication is disclosed herein. The I-UIM includes an ... | 12/10/2002 |
| 6459405 | Satellite-based location system employing knowledge-based sequential signal search strategy Disclosed is a method and apparatus for facilitating detection of satellite signals using a sequential search technique. The sequential search technique is a knowledge based technique that sequentially searches for satellite signals based on search messag... | 10/01/2002 |
| 6392988 | Transmitter architecture employing space time spreading and orthogonal transmit diversity techniques Disclosed is a common transmitter architecture having incorporated both open loop transmit diversity schemes using a plurality of binary switches. Employment of binary switches allows for the sharing of certain components whether the transmitter is utiliz... | 05/21/2002 |
| 6266412 | Encrypting speech coder Disclosed is an encrypting speech processor architecture that provides enhanced security without the use of external cryptosync and with minimal speech degradation. This is accomplished by incorporating a block encryptor and a keystream generator (instead... | 07/24/2001 |
| 6246366 | Direction determination in cellular mobile communications network A direction to the location of a mobile terminal from an antenna array is determined. A sequence of symbols from each antenna 2 in the array, is stored. The sequence contains a known training sequence. The sequence is space processed iteratively so as to ... | 06/12/2001 |
| 6212405 | Extended range concentric cell base station The present invention is a extended range concentric cell base station and a method for extending a cell size or access range without incurring ASIC correlator re-design. This is accomplished with a concentric cell base station design that incorporates mu... | 04/03/2001 |
| 6134422 | Adjustable height ground level serviceable cellsite The present invention is a base station that may be adjusted to varying altitudes along a vertical support but will not temporarily suspend wireless communications services to all mobile telephones within its associated cell when being serviced. In one em... | 10/17/2000 |
| 6014085 | Strengthening the authentication protocol The invention strengthens authentication protocols by making it more difficult for handset impersonators to gain system access using replay attacks. This goal is accomplished using challenge codes as a parameter for determining authentication codes, where... | 01/11/2000 |
| 5994957 | Feed forward amplifier improvement The present invention is a feed forward circuit and method for reducing distortion added to an output signal of the feed forward by its amplifiers without increasing the time delay in the main circuit path of the feed forward circuit. This is accomplished... | 11/30/1999 |
| 5963866 | Wireless location messaging The present invention is a wireless location messaging system and method for determining the location of a mobile-telephone in a home or roaming wireless communication system, and in a multitude of call states using an audit signal and a confirmation sign... | 10/05/1999 |
| 5894407 | Enclosures for heat producing devices The present invention is an enclosure with a cooling scheme for cooling heat producing devices, such as electronic components, contained within the enclosure. Specifically, the cooling scheme of the present invention shelters the enclosure from solar heat... | 04/13/1999 |
| 5703915 | Transmission system and multiplexing/demultiplexing equipment involving a justifiable bit stream For this system and for this equipment there has been provided a phase alignment device (30) which has an access for input data (50) applied to an access (51) at a rate of a first clock signal, and an access (70) for producing at the rate of a second cloc... | 12/30/1997 |
| 5697053 | Method of power control and cell site selection A method for use in a cellular communication system is disclosed which dynamically assigns a communication device to a cell site and which dynamically assigns transmit power levels to the communication device. The method is based on measurements of interf... | 12/09/1997 |
| 5646570 | Apparatus for biasing a field effect transistor with a single voltage supply Embodiments of the present invention bias a field effect transistor with only a single voltage source and generally do not have the disadvantages of traditional "floated source" bias techniques. Furthermore, some embodiments of the present invention are c... | 07/08/1997 |
