Patent application number | Description | Published |
20100229070 | Erasures Assisted Block Code Decoder And Related Method - An erasures assisted block code decoder and related method are provided. The erasures assisted block code decoder comprises a first block decoder, an erasures processor, and a second block code decoder. The first block decoder, for example, a Reed-Solomon decoder, is configured to decode blocks of data elements, e.g., bytes, that were previously affected by bursty errors. The first block decoder is also configured to identify those of such blocks it is unable to decode. The erasures processor is configured to identify, as erasures, data elements in the un-decodable blocks by utilizing, in the erasures identification process, data elements in the decoded blocks that were corrected by the first block decoder. The second block decoder, e.g., the same or different Reed-Solomon decoder, is configured to decode one or more of the un-decodable blocks by utilizing, in the decoding, the erasures identified by the erasures processor. | 09-09-2010 |
20130142061 | Detecting Extended Acquisition Indicators - Various embodiments are disclosed for detecting extended acquisition indicators in a wireless communication device. Acquisition indicator (AI) data is received, including an acquisition indicator (AI), a corresponding AI signature, and a corresponding plurality of extended AI indicators (EAI). The device determines whether channel power corresponding to the received AI signature exceeds a first negative limit. The device determines whether a reliability metric of the extended acquisition indicators exceeds a second limit. If the channel power does not exceed the first negative limit and the reliability metric does not exceed the second limit, the device declares the AI to be an indeterminate indicator that denotes neither acknowledgment nor denial of an access request associated with the received AI data. | 06-06-2013 |
20130142238 | HIGH RESOLUTION SYMBOL TIMING TRACKING - Embodiments of the present disclosure prove an apparatus and method for symbol timing tracking. Such embodiments are configured to obtain a sampling time for sampling a signal pulse; generate a symbol value for the sampling time from actual sample values of the signal pulse corresponding to predetermined sampling times by interpolating the symbol value utilizing the predetermined sampling times and the actual sample values, wherein the sampling time is not included as one of the predetermined sampling times; and utilize the symbol value to determine an optimal sampling time for sampling the signal pulse. | 06-06-2013 |
20130143577 | FREQUENCY OFFSET CORRECTION - Various methods and systems are provided for frequency offset correction. In one example, among others, a method includes determining a phase estimation of a RF signal, rotating a sample of the RF signal based at least in part upon the phase estimation, and determining a channel estimation based upon the rotated sample. The channel estimation may be derotated based at least in part upon the phase estimation. In another example, a communication device includes a phase rotator configured to rotate RF signal samples based upon a rotation offset, a channel estimation filter configured to determine channel estimates, and a phase derotator configured to rotate the channel estimates based upon another rotation offset. Another example of a communication device includes a differential detector configured to determine conjugate multiply results, an averaging filter configured to sum the results, and a phase estimator configured to determine a phase estimation based upon the sum. | 06-06-2013 |
20130259093 | SYSTEMS AND METHODS FOR PROVIDING TIMING TRACKING LOOPS IN A COMMUNICATION SYSTEM - Various embodiments are disclosed for providing timing tracking loops in a communication system. A communication system includes a delay locked loop (DLL) comprising a maximum region detector configured to identify a target channel profile comprising at least a portion of the multipath signals based on the timing information, the maximum region detector further configured to apply a weight vector to each channel tap in the target channel profile and determine a tap with a maximum power level relative to remaining channel taps in the channel profile. The system further comprises a window timing loop (WTL) adjuster configured to track a position of a channel estimation window (CEW) within an observation window corresponding to the maximum channel energy level, where the maximum channel energy level corresponds to the sum of the energy of all the taps for a given window. | 10-03-2013 |
20130259104 | Synchronous Mode Tracking of Multipath Signals - In one embodiment, a method comprising sampling by a first sampling unit a first signal received via a first antenna; and sampling by a second sampling unit a second signal received via a second antenna, the sampling of the second signal commencing in synchronization with the sampling of the first signal by the first sampling unit based on an accumulated value, the first and second signal sharing common information. | 10-03-2013 |
20140029647 | SUPPRESSING INTRA-CELL INTERFERENCE - In one embodiment, intra-cell interference suppression is achieved upstream of a chip-level equalizer, thereby mitigating downstream processing resources. | 01-30-2014 |
20140029706 | CONVERGENCE DURING INTERFERENCE SUPPRESSION - In one embodiment, interference suppression is improved by improving convergence criteria. For some embodiments, convergence is improved by employing non-constant alpha-beta-weighting. For other embodiments, convergence is improved by employing successive interference suppression methods that have guaranteed convergence properties. | 01-30-2014 |
20140140376 | System and Method for a Krylov Method Symbol Equalizer - Disclosed are various embodiments for a symbol level Krylov method equalizer implemented in a wireless communications device. An HSDPA or WCDMA signal is input to the wireless communications device. A conjugate gradient method is applied to symbol-level samples of the signal until a termination condition is met. The termination condition may comprise having zero residual error, residual error below a threshold, or a specified number of iterations. Additionally, a preconditioning matrix may be applied to the inputs of the conjugate gradient method. | 05-22-2014 |