Patent application number | Description | Published |
20090003495 | ENHANCED PILOT SIGNAL RECEIVER - Briefly, in accordance with one embodiment, a method of adjusting for digital automatic gain control (DAGC) quantization error in a mobile station is as follows. A first DAGC value is stored before reception of one or more enhanced pilot signals. A second DAGC value is computed during reception of the one or more enhanced pilot signal. The first DAGC value is restored after reception of the one or more enhanced pilot signals is over. An advantage associated with this particular embodiment may include reduction in quantization error for digital automatic gain control. | 01-01-2009 |
20090124265 | ENHANCED PILOT SIGNAL - Briefly, in accordance with one embodiment, a method of transmitting signals is provided. Signal waveforms are transmitted from at least two respective sectors. The at least two respective sectors are from at least two different sets of a superset of sectors. The transmitted signal waveforms include signal waveforms at least nearly mutually orthogonal at least along a particular signal dimension. An advantage of such an embodiment, for example, is reduced signal interference. | 05-14-2009 |
20090160709 | METHODS AND SYSTEMS FOR PROVIDING ENHANCED POSITION LOCATION IN WIRELESS COMMUNICATIONS - Embodiments disclosed herein relate to methods and systems for providing improved position-location (e.g., time-of-arrival) measurement and enhanced position location in wireless communication systems. In an embodiment, an access point may replace information (e.g., data) transmission by a “known” transmission (or “reference transmission”) at a predetermined time known to access terminals in the corresponding sectors. The access terminals may use the received reference transmission to perform a position-location measurement, and report back the measured information. The access point may also send a reference transmission on demand, e.g., in response to a request from an access terminal in need for a location-based service. | 06-25-2009 |
20090196294 | PACKET TRANSMISSION VIA MULTIPLE LINKS IN A WIRELESS COMMUNICATION SYSTEM - Techniques for generating and transmitting packets on multiple links in a wireless communication system are described. In one aspect, a transmitter generates new packets for the multiple links based on the likelihood of each link being available. The transmitter determines the likelihood of each carrier being available based on whether or not there is a pending packet on that carrier and, if yes, the number of subpackets sent for the pending packet. The transmitter generates new packets such that packets for links progressively less likely to be available contain data units with progressively higher sequence numbers. The transmitter determines whether each link is available and sends a packet on each link that is available. In another aspect, the transmitter generates and sends new packets in a manner to ensure in-order transmission. In one design, the transmitter generates new packets for each possible combination of links that might be available. | 08-06-2009 |
20090203386 | POSITIONING USING ENHANCED PILOT SIGNAL - Briefly, in accordance with one embodiment, a method of transmitting signals is provided. Signal waveforms are transmitted from at least two respective sectors. The at least two respective sectors are from at least two different sets of a superset of sectors. The transmitted signal waveforms include signal waveforms at least nearly mutually orthogonal at least along a particular signal dimension. An advantage of such an embodiment, for example, is reduced signal interference. | 08-13-2009 |
20090232052 | FRAME TERMINATION - Techniques to increase capacity in a wireless communications system. In an aspect, systematic non-transmission, or “blanking,” of minimal-rate frames transmitted in a communications system is provided. In an exemplary embodiment, eighth rate frames in a cdma2000 voice communications system are systematically substituted with null-rate frames carrying zero traffic bits. Provisions are nevertheless made for the transmission of certain designated as “critical” by, e.g., a vocoder. The receiver detects the presence of null rate or non-null rate transmissions and processes the received frames accordingly, including updating an outer loop power control only in response to non-null rate frames. Further techniques for changing the pilot transmission gating pattern to assist the receiver in detecting null rate frames are provided. In another aspect, early termination of a signal transmission over a wireless communications link is provided. In an exemplary embodiment, a base station (BS) transmits power control groups (PCG's) for a frame over a forward link (FL) to a mobile station (MS) until accurate reception of the frame is acknowledged by the MS over a reverse link (RL), possibly before all PCG's of the frame are received over the FL. Possible ACK signaling methods are defined for channels associated with a cdma2000 wireless communications system. In another exemplary embodiment, techniques for reverse link early termination are also provided. | 09-17-2009 |
20090252201 | PILOT INTERFERENCE CANCELLATION - Techniques for generalized pilot interference cancellation in a communications receiver. In an exemplary embodiment, a residual pilot is cancelled from a post-traffic cancellation signal following initial first-pass pilot cancellation. Residual pilot cancellation is achieved by adding the first-pass cancelled pilot as earlier stored in memory back to the post-traffic cancellation signal, and pilot filtering the resulting signal to generate an improved pilot interference estimate. In an alternative exemplary embodiment, an arbitrary number of iterations may be applied to generate the pilot interference estimate by successively storing each generated pilot interference estimate in memory. | 10-08-2009 |
20100080189 | METHOD AND APPARATUS FOR PLUG-AND-PLAY VENUE-CAST CO-CHANNEL WITH WIDE-AREA NETWORK - A system, method, and apparatus for providing venue-cast service in a wireless access network are disclosed. A local transmitter can request reservation of air link resources on the wireless access network for a venue-cast transmission. The local transmitter can receive a forward link signal with a timing reference for data transmitted on the wireless access network such as, for example, the forward link signal in an EV-DO network or a FLO-based media distribution system. Based on the timing reference, the local transmitter can transmit venue-cast information in a same frequency band as the forward link signal utilizing the reserved air link resources. Optionally, the venue-cast system can include a collocated network repeater and the local transmitter can synchronize its timing and transmit power to the forward link signal from the repeater. | 04-01-2010 |
20100105336 | ACTIVE SET MANAGEMENT WITH HOTSPOT CARRIERS - Techniques for managing communications in a cellular network are disclosed. The cellular network can include one or more sectors in which hotspot carriers are deployed. The hotspot carriers can be available to mobile devices beyond sector boundaries defined by the signal strength of ubiquitous carriers. A mobile device can measure a signal strength of a candidate hotspot carrier and estimate a reverse link mobile device transmit power level for communicating on the hotspot carrier. The mobile device may determine whether to add, remove, or maintain the hotspot carrier in its active set based on the estimated transmit power level so as to limit interference to the reverse link of non-hotspot sectors. | 04-29-2010 |
20100165845 | WIRELESS NETWORK RESOURCE ADAPTATION - A method of regulating data flow in a wireless communication network includes: collecting data regarding dynamic loading of sector-carrier pairs (pilots) in communication sectors of the wireless communication network; obtaining data rates for data flows of the pilots to access terminals within the wireless communication network; determining one or more pilots to use for conveying data in the wireless communication network based on the data rates and the dynamic loading; and altering data flow over the pilots by at least one of changing a data rate over at least one of the pilots or changing a combination of pilots used by the wireless communication network for conveying data to increase total data flow. | 07-01-2010 |
20100285734 | DUAL-STAGE ECHO CANCELLATION IN A WIRELESS REPEATER USING AN INSERTED PILOT - In one embodiment, a method for providing echo cancellation in a wireless repeater includes: adding the pilot signal to a transmit signal; receiving a receive signal being the sum of a remote signal, a feedback pilot signal and a feedback transmit signal; cancelling the feedback transmit signal from the receive signal using a currently available feedback channel estimate and generating a first echo cancelled signal; generating an updated feedback channel estimate using the first echo cancelled signal and the pilot signal as a reference signal; cancelling the feedback transmit signal and the feedback pilot signal from the receive signal using the updated feedback channel estimate and generating a second echo cancelled signal; and amplifying the second echo cancelled signal as the transmit signal. In another embodiment, the feedback pilot signal is cancelled from the first echo cancelled signal using the updated feedback channel estimate to generate the second echo cancelled signal. | 11-11-2010 |
20110149863 | METHODS AND SYSTEMS FOR PROVIDING ENHANCED POSITION LOCATION IN WIRELESS COMMUNICATIONS - Embodiments disclosed herein relate to methods and systems for providing improved position-location (e.g., time-of-arrival) measurement and enhanced position location in wireless communication systems. In an embodiment, an access point may replace information (e.g., data) transmission by a “known” transmission (or “reference transmission”) at a predetermined time known to access terminals in the corresponding sectors. The access terminals may use the received reference transmission to perform a position-location measurement, and report back the measured information. The access point may also send a reference transmission on demand, e.g., in response to a request from an access terminal in need for a location-based service. | 06-23-2011 |
20110310858 | BEACON SIGNALING METHOD AND APPARATUS - Systems and methods are described herein for managing beacon signaling in a wireless communication system. A method described herein includes identifying a neighboring macrocell and a time division multiplexing (TDM) channel offset of the neighboring macrocell, the channel offset corresponding to at least one of a signaling channel or an overhead channel; selecting a local channel offset that differs from the channel offset of the neighboring macrocell; and generating a transmission schedule such that first transmissions are omitted for at least a portion of transmission intervals of the neighboring macrocell; wherein the transmission intervals of the neighboring macrocell are identified according to the channel offset of the neighboring macrocell and wherein the first transmissions include at least one of pilot transmissions, medium access control (MAC) transmissions or traffic transmissions. | 12-22-2011 |
20120127870 | Method and Apparatus for Enabling an Enhanced Frequency Domain Equalizer - A method and apparatus for enabling an enhanced FDE in a TD-SCDMA system is provided. The method may comprise receiving one or more signals from one or more cells over one or more channels where each channel is described using a channel vector and a spreading vector, and where each signal includes one or more data blocks each including a number of symbols, converting the one or more received signals from a time domain into a frequency domain using a block FFT, inverting a covariance matrix, wherein the covariance matrix is derived from a linear convolution of the one or more channel vectors and the one or more spreading vectors, and determining one or more MMSE signals by manipulating the frequency domain one or more received signals by applying the inverted equivalent channel matrix. | 05-24-2012 |
20120127923 | Method and Apparatus for Enabling a Low Complexity Receiver - A method and apparatus for enabling a low complexity DL receiver in a TD-SCDMA system is provided. The method may comprise receiving two or more signals from two or more cells, determining at least one of the two or more cells does not comprise colored noise, applying a white noise matrix approximation to each of the at least one of the two or more cells that does not comprise colored noise, applying a channel matrix approximation to the two or more received signals, and generating a MMSE coordination matrix using the white noise matrix approximation and the channel matrix approximation. | 05-24-2012 |
20130010780 | FAST TIMING ACQUISITION IN CELL SEARCH - Timing acquisition may be performed without typical correlation computations by determining a power of a received signal at certain points in time and using the determined power to identify gaps in the received signal. By determining gaps in the received signal, frame timing may be estimated, particularly in time-division networks where the location of guard periods within a frame is known. Gap detection may thus be used for timing acquisition. | 01-10-2013 |
20130217401 | POSITIONING USING ENHANCED PILOT SIGNAL - Briefly, in accordance with one embodiment, a method of transmitting signals is provided. Signal waveforms are transmitted from at least two respective sectors. The at least two respective sectors are from at least two different sets of a superset of sectors. The transmitted signal waveforms include signal waveforms at least nearly mutually orthogonal at least along a particular signal dimension. An advantage of such an embodiment, for example, is reduced signal interference. | 08-22-2013 |
20130242826 | METHOD AND APPARATUS FOR DISCONTINUOUS RECEPTION IN USER EQUIPMENT FOR POWER SAVINGS - Methods and apparatuses to power off a modem receiver or components of the receiver at a time prior to the end of the frame based on data in the frame being received and properly decoded before the end of the frame. In an aspect, the apparatuses and methods provide power saving in a wireless device, and include receiving data within a frame at a user equipment, determining whether all payload packet data has been correctly decoded prior to an end of the frame, and powering down a receiver component for a portion of a remainder of the frame in response to determining that all payload packet data has been correctly decoded and where a first time period to a next scheduled overhead hit transmission period of a slot in the frame is greater than a second time period corresponding to a warm-up period for the receiver component. | 09-19-2013 |
20130266097 | Early Termination Schemes for Turbo Decoding in a Wireless Communication System - Certain embodiments provide methods that may allow for improvements in performance and power consumption by terminating the turbo decoding process early when one of at least two test criterion is satisfied in communications systems, including UMTS, WCDMA, and TD-DCMA. | 10-10-2013 |
20140029705 | ENHANCED PILOT SIGNAL RECEIVER - Briefly, in accordance with one embodiment, a method of adjusting for digital automatic gain control (DAGC) quantization error in a mobile station is as follows. A first DAGC value is stored before reception of one or more enhanced pilot signals. A second DAGC value is computed during reception of the one or more enhanced pilot signal. The first DAGC value is restored after reception of the one or more enhanced pilot signals is over. An advantage associated with this particular embodiment may include reduction in quantization error for digital automatic gain control. | 01-30-2014 |
20140036875 | PILOT SIGNAL SET MANAGEMENT IN A MULTI-CARRIER COMMUNICATION SYSTEM - In a wireless communication system where different frequency bands are deployed to generate various communication zones, pilot signal set management for a plurality of pilot signals generated from an additional coverage zone is based on identifying a preselected signal set from the plurality of pilot signals and determining whether a predetermined criterion is met | 02-06-2014 |
20140038645 | ENHANCED PILOT SIGNAL RECEIVER - Briefly, in accordance with one embodiment, a method of adjusting for digital automatic gain control (DAGC) quantization error in a mobile station is as follows. A first DAGC value is stored before reception of one or more enhanced pilot signals. A second DAGC value is computed during reception of the one or more enhanced pilot signal. The first DAGC value is restored after reception of the one or more enhanced pilot signals is over. An advantage associated with this particular embodiment may include reduction in quantization error for digital automatic gain control. | 02-06-2014 |
20140053049 | METHODS AND APPARATUSES FOR SAVING POWER DURING TRANSPORT BLOCK DECODING IN UMTS SYSTEMS - The present disclosure describes methods and apparatuses for improved transport block decoding in devices capable of wireless communication, which may include user equipment and network entities. For example, the present disclosure presents methods and apparatuses for decoding a code block from a plurality of code blocks corresponding to a transport block, obtaining a reliability indicator that identifies a reliability of the decoding of the code block, comparing the reliability indicator to a reliability threshold, and determining whether to decode a subsequent code block from the plurality of code blocks based on the comparing. Furthermore, these methods and apparatuses may include determining not to decode at least one subsequent code block of the transport block where the comparing indicates that the reliability indicator is less than the reliability threshold. As such, device power is not unnecessarily consumed by decoding likely superfluous code blocks. | 02-20-2014 |
20140241269 | METHODS AND APPARATUS FOR CONDITIONAL OFFLOAD OF ONE OR MORE LOG-LIKELIHOOD RATIOS (LLRS) OR DECODED BITS - Techniques and apparatus are provided for conditional offload of one or more LLRs or decoded bits. An exemplary electronic device (ED) method includes receiving a transmission of a physical downlink shared channel (PDSCH) having a transport block (TB) comprising at least one code block (CB), performing a cyclic redundancy check (CRC) of the at least one CB, in a memory external to a modem core of the ED, storing a subset of log-likelihood ratios (LLRs) associated with the at least one CB if the at least one CB failed the CRC or decoded bits associated with the at least one CB if the at least one CB passed the CRC, wherein the subset is based on an LLR range of the transmission relative to an LLR range of one or more previous transmissions, and using the stored subset of LLRs or decoded bits to process a re-transmission of the PDSCH. | 08-28-2014 |
20140269616 | PILOT GROUPING AND ROUTE PROTOCOLS IN MULTI-CARRIER COMMUNICATION SYSTEMS - Embodiments disclosed herein relate to methods and systems for pilot grouping, route protocols, and scheduling in multi-carrier communication systems. In an embodiment, an access terminal may group a plurality of pilot signals characterized by different frequencies into one or more pilot groups, each pilot grouping being identified by a plurality of parameters (e.g., a PN offset and a group ID). Each pilot group may include pilot signals having substantially the same coverage area. The access terminal may further select a representative pilot signal from each pilot group for pilot strength reporting. The access terminal may also use the pilot grouping for effective set management. | 09-18-2014 |
20140269638 | METHODS AND SYSTEMS FOR PROVIDING ENHANCED POSITION LOCATION IN WIRELESS COMMUNICATIONS - Embodiments disclosed herein relate to methods and systems for providing improved position-location (e.g., time-of-arrival) measurement and enhanced position location in wireless communication systems. In an embodiment, an access point may replace information (e.g., data) transmission by a “known” transmission (or “reference transmission”) at a predetermined time known to access terminals in the corresponding sectors. The access terminals may use the received reference transmission to perform a position-location measurement, and report back the measured information. The access point may also send a reference transmission on demand, e.g., in response to a request from an access terminal in need for a location-based service. | 09-18-2014 |