Patent application number | Description | Published |
20110096430 | Converting Timing Errors into Symbol Errors to Handle Write Mis-Synchronization in Bit-Patterned Media Recording Systems - A method includes writing data to a bit-patterned media at times determined by a clock having a period that is offset from a bit island period by a fixed offset to create one insertion or one deletion approximately within a predetermined number of bit islands, reading the data, and correcting the read data using error correction. An apparatus that implements the method is also provided. | 04-28-2011 |
20110280068 | JOINT ENCODING OF LOGICAL PAGES IN MULTI-PAGE MEMORY ARCHITECTURE - Multiple logical pages are jointly encoded into a single code word and are stored in the same physical page of a solid state non-volatile memory (NVM) device having multi-level memory cells. A first logical page of the multiple logical pages is stored in the memory device as first bits of the multi-level memory cells while a second logical page of the multiple logical pages is temporarily cached. After the first logical page is stored as the first bits of the memory cell, the second logical page is stored as second bits of the memory cells. | 11-17-2011 |
20110280069 | ITERATIVE DEMODULATION AND DECODING FOR MULTI-PAGE MEMORY ARCHITECTURE - Methods and systems for accessing encoded data stored in a solid state non-volatile memory device include iteratively demodulating and decoding the data. The memory device includes memory cells arranged to store multiple bits of data per memory cell. The memory cells are capable of storing multiple pages of data. Each bit stored in a memory cell is associated with a page of data that is different from other pages associated with other bits stored in the memory cell. The multiple pages are demodulated responsive to sensed voltage levels of the memory cells, and a demodulated output is provided for each page of the multiple pages. A decoded output for each page of the multiple pages is generated. Decoding the page and demodulating the multiple pages proceeds iteratively, including an exchange of information between the decoder and the demodulator. | 11-17-2011 |
20130275829 | USING A SOFT DECODER WITH HARD DATA - A method for re-using a soft decoder involves receiving soft data and hard data from memory cells in a memory device, mapping the soft data to a first set of soft information, mapping the hard data to a second set of soft information, and using the soft decoder to decode both the first set and second set of soft information. | 10-17-2013 |
Patent application number | Description | Published |
20090075620 | LOCAL OSCILLATOR BUFFER AND MIXER HAVING ADJUSTABLE SIZE - Selectable sizes for a local oscillator (LO) buffer and mixer are disclosed. In an exemplary embodiment, LO buffer and/or mixer size may be increased when a receiver or transmitter operates in a high gain mode, while LO buffer and/or mixer size may be decreased when the receiver or transmitter operates in a low gain mode. In an exemplary embodiment, LO buffer and mixer sizes are increased and decreased in lock step. Circuit topologies and control schemes for specific exemplary embodiments of LO buffers and mixers having adjustable size are disclosed. | 03-19-2009 |
20090156152 | TRACKING FILTER FOR A RECEIVER - A tracking filter for attenuating out-of-band signals and adjacent channel signals in a receiver is described. In one exemplary design, an apparatus includes a tracking filter, an LNA, and a downconverter. The tracking filter includes a summer, a filter, and an upconverter. The summer subtracts a feedback signal from an input signal and provides a first signal. The LNA amplifies the first signal and provides a second signal. The downconverter frequency downconverts the second signal and provides an output signal. The filter filters (e.g., differentiates) the output signal and provides a third signal. The filter blocks a desired signal and passes out-of-band signal components. The upconverter frequency upconverts the third signal and provides a fourth signal from which the feedback signal is derived. The tracking filter has an equivalent bandpass filter response and a variable center frequency determined based on the frequency of the desired signal. | 06-18-2009 |
20090190692 | LINEAR AND POLAR DUAL MODE TRANSMITTER CIRCUIT - Method and apparatus for configuring a transmitter circuit to support linear or polar mode. In the linear mode, a baseband signal is specified by adjusting the amplitudes of in-phase (I) and quadrature (Q) signals, while in the polar mode, the information signal is specified by adjusting the phase of a local oscillator (LO) signal and the amplitude of either an I or a Q signal. In an exemplary embodiment, two mixers are provided for both linear and polar mode, with a set of switches selecting the appropriate input signals provided to one of the mixers based on whether the device is operating in linear or polar mode. In an exemplary embodiment, each mixer may be implemented using a scalable architecture that efficiently adjusts mixer size based on required transmit power. | 07-30-2009 |
20110110463 | RECEIVER WITH BALANCED I/Q TRANSFORMER - A receiver with a balanced I/Q transformer is described. In an exemplary design, the receiver includes an LNA that amplifies a received RF signal and provides a single-ended RF signal to the balanced I/Q transformer. The balanced I/Q transformer includes at least one primary coil and first and second secondary coils. The first secondary coil is magnetically coupled to the at least one primary coil and provides a first differential RF signal to a first mixer. The second secondary coil is magnetically coupled to the at least one primary coil and provides a second differential RF signal to a second mixer. The first and second mixers downconvert the first and second differential RF signals with I and Q LO signals, respectively, and provide differential I and Q downconverted signals. The primary and secondary coils may be fabricated on two conductive layers of an integrated circuit. | 05-12-2011 |
Patent application number | Description | Published |
20090109919 | Random Access Cyclic Prefix Dimensioning in Wireless Networks - User equipment (UE)-initiated accesses within a cellular network include non-synchronized random access requests when the UE is not synchronized with a base station that is serving a cell occupied by the UE. The random access request is formed by generating a set of samples at a selected sample rate, such that the set of samples spans a specified duration period, wherein the sample rate is one of a plurality of different sample rates enabling different implementations of the random access transmission. The specified duration period is integrally divisible by each of the plurality of different sample periods. | 04-30-2009 |
20100260000 | Low-Power Operation of Static Memory in a Read-Only Mode - A static random access memory (SRAM) operable that is biased at lower power supply voltages in a read-only mode than in a read/write mode. The SRAM can be embedded within a large-scale integrated circuit, for example in combination with a microprocessor and associated circuitry. Upon system control circuitry determining that an SRAM array can be operated in a read-only mode, for example that a large number of read operations are likely to be performed prior to writing to the SRAM array, the power supply voltages applied to the SRAM array are reduced. The array power supply voltage and periphery power supply voltage can be at separate voltages and separately reduced from the read/write mode to the read-only mode. The read-only mode can be readily used for instruction cache memories, and for local instruction memories associated with an embedded microcontroller. | 10-14-2010 |
20120026808 | Integrated Circuit With Low Power SRAM - An integrated circuit containing a SRAM memory with SRAM bits optimized to have a lower minimum read voltage than the minimum write voltage. A method for reading a SRAM memory bit using a read voltage that is lower than the write voltage. | 02-02-2012 |
20140036609 | TESTING RETENTION MODE OF AN SRAM ARRAY - An embodiment of the invention discloses a method for testing the retention mode of an array of SRAM cells. A data pattern is written to the array. After the data pattern is written, a retention circuit is enabled for a period of time that drops the voltage on a supply line. During this period of time, a first current is drawn from the supply line by sources internal (i.e. leakage current) to the array. Also during this time period, current is drawn from the supply line by a discharge circuit. The second current is provided to shorten the time required to test the retention mode of the array. After the period of time has expired, the retention mode and the discharge circuit are disabled and the data pattern is read from the array and compared to the data pattern written to the array. | 02-06-2014 |
20140071735 | INITIALIZING DUMMY BITS OF AN SRAM TRACKING CIRCUIT - An embodiment of the invention discloses a method for writing concurrently a binary logical value to one or more dummy memory cells in a dummy bit line pair. A diode is electrically connected between a power supply and the positive power supply line connected to the dummy memory cells. The binary logical value is then driven on to the dummy bit line pair. Next, one or more dummy word lines are driven to a logical high allowing selected dummy memory cells to be written with the binary logical value. After the selected dummy memory cells have been written to, the one or more dummy word lines are driven to a logical low. Next the diode is disabled by turning on a PFET connected between the power supply and the positive power supply line. Turning on the PFET also electrically connects the power supply to the positive power supply line. | 03-13-2014 |
20140071736 | TESTING SIGNAL DEVELOPMENT ON A BIT LINE IN AN SRAM - An embodiment of the invention discloses a method for testing a memory cell in an SRAM. The number of dummy memory cells on a single dummy word line used to drive the dummy bit lines is selected. A binary logical value is written to a memory cell in the SRAM. The single dummy word line and a word line containing the memory cell in the SRAM are driven to logical high values concurrently. A dummy bit line, driven by the dummy memory cells, drives an input of a buffer to a binary logical value stored in the dummy memory cells. An output of the buffer enables a sense amp to amplify a voltage developed across the bit lines electrically connected to the memory cell. | 03-13-2014 |
Patent application number | Description | Published |
20090075620 | LOCAL OSCILLATOR BUFFER AND MIXER HAVING ADJUSTABLE SIZE - Selectable sizes for a local oscillator (LO) buffer and mixer are disclosed. In an exemplary embodiment, LO buffer and/or mixer size may be increased when a receiver or transmitter operates in a high gain mode, while LO buffer and/or mixer size may be decreased when the receiver or transmitter operates in a low gain mode. In an exemplary embodiment, LO buffer and mixer sizes are increased and decreased in lock step. Circuit topologies and control schemes for specific exemplary embodiments of LO buffers and mixers having adjustable size are disclosed. | 03-19-2009 |
20090267657 | METHOD AND APPARATUS FOR DIVIDER UNIT SYNCHRONIZATION - A method an apparatus for synchronizing phases of one or more divider units comprise powering on a master divider unit to provide a reference signal. A phase of a slave divider unit is synchronized to the reference signal from the master divider unit by providing a power on pulse at the slave divider unit, synchronizing the phase of the slave divider unit to the reference signal using a digitally controlled oscillator, and powering on the slave divider unit after a first predetermined delay period following a rising edge of the power on pulse. By synchronizing a slave divider unit to the reference signal from the master divider unit, any number of slave divider units may be powered on and in-phase with each other. | 10-29-2009 |
20140375363 | FREQUENCY DIVIDER WITH DUTY CYCLE ADJUSTMENT WITHIN FEEDBACK LOOP - A frequency divider with duty cycle adjustment within a feedback loop is disclosed. In an exemplary design, an apparatus includes at least one divider circuit and at least one duty cycle adjustment circuit coupled in a feedback loop. The divider circuit(s) receive a clock signal at a first frequency and provide at least one divided signal at a second frequency, which is a fraction of the first frequency. The duty cycle adjustment circuit(s) adjust the duty cycle of the at least one divided signal and provide at least one duty cycle adjusted signal to the divider circuit(s). The divider circuit(s) may include first and second latches, and the duty cycle adjustment circuit(s) may include first and second duty cycle adjustment circuits. The first and second latches and the first and second duty cycle adjustment circuits may be coupled in a feedback loop and may perform divide-by-2. | 12-25-2014 |
Patent application number | Description | Published |
20110246148 | Radio model updating - The subject matter disclosed herein relates to systems, methods, apparatuses, devices, articles, and means for updating radio models. For certain example implementations, a method for one or more server devices may comprise receiving at one or more communication interfaces at least one measurement that corresponds to a position of a first mobile device within an indoor environment. At least one radio model that is stored in one or more memories may be updated based, at least in part, on the at least one measurement to produce at least one updated radio model. The at least one radio model and the at least one updated radio model may correspond to the indoor environment. The at least one updated radio model may be transmitted to enable a second mobile device to use the at least one updated radio model for positioning within the indoor environment. Other example implementations are described herein. | 10-06-2011 |
20120225663 | RSSI-BASED INDOOR POSITIONING IN THE PRESENCE OF DYNAMIC TRANSMISSION POWER CONTROL ACCESS POINTS - A position fix for a mobile platform is determined using RSSI values for wireless signals received from access points (APs), at least one of which has dynamic transmission power control. The transmission power data for the APs is received from an entity separate from the APs, e.g., a central entity or a positioning assistance server. The RSSI values for wireless signals received from the APs are acquired, as is an RSSI heatmap. Using the transmission power data, the RSSI values and the RSSI heatmap, the position fix for the mobile platform is determined. The position fix may be determined by the mobile platform or a positioning assistance server. Additionally, a server may receive transmission power data for APs and may provide to a mobile platform RSSI heatmap information based on the transmission power data. The RSSI heatmap information may be, e.g., the transmission power data or a RSSI heatmap. | 09-06-2012 |
20120295654 | MEASUREMENTS AND INFORMATION GATHERING IN A WIRELESS NETWORK ENVIRONMENT - Disclosed are methods, apparatus, computer readable media and other implementations, including a method for communicating network information. The method includes transmitting a request message from a mobile device to an access point, and receiving, at the mobile device, a reply message transmitted from the access point in response to receiving the request message, the reply message including data representative of a transmitted signal power level at the access point of the reply message. The method further includes determining, based on the received reply message including the data representative of the transmitted signal power level at the access point, a received signal power level at the mobile device of the reply message, and a round trip time from a first time instance when the request message was transmitted from the mobile device to a second time instance when the reply message was received at the mobile device. | 11-22-2012 |
20130196681 | COMPENSATING FOR USER OCCLUSION IN WI-FI POSITIONING USING MOBILE DEVICE ORIENTATION - Techniques for determining the position of a mobile wireless device are provided. The techniques include a method for determining the position of a mobile wireless device that includes receiving signal characteristics of a signal received from the mobile wireless device at a wireless access point of a Wireless Local Area Network (WLAN), determining an orientation of the mobile wireless device relative to the wireless access point, determining a compensation factor based on the orientation of the mobile wireless device relative to the wireless access point, and determining an estimated position of the mobile wireless device based at least in part on the compensation factor. The compensation factor compensates for the effect of user occlusion on at least one characteristic of the signal received from the mobile wireless device. | 08-01-2013 |
20130223261 | Processing time determination for wireless position determination - An example method for determining a processing time for wirelessly determining a position of a mobile station includes: measuring a round trip time delay to each of multiple wireless access points; estimating an initial processing time for each of the wireless access points; calculating the position of the mobile station based upon the measured round trip time delays and estimated processing times; and updating the initial processing time for each of the wireless access points based upon the calculated position of the mobile station. | 08-29-2013 |
20130237246 | Wireless signal model updating using determined distances - An example method for updating a wireless signal model includes: measuring a distance from a mobile station to each wireless access point, of multiple wireless access points, based upon a wireless signal model; calculating a position of the mobile station based upon the measured distance; determining a computed distance to each wireless access point based upon the calculated position of the mobile station; updating the wireless signal model based upon the measured and computed distances to each wireless access point; and determining whether the wireless signal model has converged. | 09-12-2013 |
20140128100 | Binning Venues Into Categories Based On Propagation Characteristics - Example methods, apparatuses, or articles of manufacture are disclosed herein that may be utilized to facilitate or otherwise support one or more processes or operations in connection with binning venues into categories based, at least in part, on signal propagation characteristics associated with such venues. | 05-08-2014 |
20140274043 | ACCESS POINT SELECTION FOR ASSISTANCE DATA GENERATION - Methods, systems, computer-readable media, and apparatuses selecting access points and generating assistance data for access points is provided. In one embodiment a plurality of access points in a first area are identified, a location assistance quality value with each access point of the plurality of access points is associated with each access point, and a subset of the plurality of access points is selected based on the location assistance quality value of each access point of the plurality of access points. Assistance data is then generated for the selected access points. | 09-18-2014 |
20140281698 | METHOD AND APPARTUS FOR DETECTING ANOMALIES WITHIN INDOOR INFORMATION - Methods, systems, computer-readable media, and apparatuses for detection of anomalies within indoor map information are presented. In some embodiments, the method includes receiving a digital map. The method may further include identifying one or more anomalies within the digital map using a software-based anomaly detection tool. The method may also include displaying one or more suggested corrections to a user based on the one or more identified anomalies. The method may additionally include correcting the one or more identified anomalies within the digital map. | 09-18-2014 |
20150131460 | METHOD AND APPARATUS FOR USING RSSI AND RTT INFORMATION FOR CHOOSING ACCESS POINTS TO ASSOCIATE WITH - During access point discovery, an initial list of access points available for connection is generated. The received signal strength indication (RSSI) and round trip time (RTT) delay for the access points in the initial list are measured, e.g., during discovery and by a plurality of active measurements. The initial list is pruned based on an initial and subsequent RSSI and RTT measurements to produce a master list of access points. The pruning of the initial list of access points may be based on the differentials in the RSSI measurements and the RTT measurements as well as a determination of access points that the mobile device is moving away from. As the mobile device moves to different locations, access points from the master list may be selected and connected with based on the expected duration of availability as determined by RSSI and RTT measurements. | 05-14-2015 |