Patent application number | Description | Published |
20110134809 | MUROS Modulation using Linear Baseband Combinations with Linear Gaussian Pulse Shaping for Two users on One Timeslot used by Non-DARP and DARP Remote Stations - The present patent application improves DARP by allowing multiple users on one time slot (MUROS). It comprises means, instructions and steps for combining two signals. In one example, it comprises at least one baseband modulator, a plurality of amplifiers where the signals are multiplied by a gain; at least one combiner operably connected to the amplifiers where the signals are combined; and a phase shifter where one of the signals is phase shifted with respect to the other signal. In another example; the apparatus further comprises a phase shifter operably connected to the at least one baseband modulator to provide a π/2 phase shift between the two signals. In another example, the at least one baseband modulator comprises a BPSK baseband modulator on an I axis and a BPSK baseband modulator on a Q axis. | 06-09-2011 |
20130201898 | CO-CHANNEL COMMUNICATION METHODS, SYSTEMS, & DEVICES - Co-channel communications methods, systems, and devices are provided. Embodiments can be utilized to allow multiple users on one time slot (MUROS). For example, a method for wireless communication by a first remote station can comprise receiving a first co-channel signal that has a first amplitude and a second co-channel signal that has a second amplitude, wherein a difference between the first amplitude and the second amplitude is less than a threshold; selecting one of the first co-channel signal and the second co-channel signal; and demodulating the selected co-channel signal. Other aspects, embodiments, and features are also claimed and described. | 08-08-2013 |
20130225157 | ENHANCED SLOW ASSOCIATED CONTROL CHANNEL (ESACCH) - A method for wireless communication is described. A slow associated control channel block is received. It is determined that the slow associated control channel block fails an integrity check. A correlation level between the slow associated control channel block and one or more stored slow associated control channel blocks is determined. The stored slow associated control channel blocks are set based on a maximum correlation level. Other aspects, embodiments, and features are also claimed and described. | 08-29-2013 |
20140064161 | METHODS AND DEVICES FOR FACILITATING EARLY HEADER DECODING IN COMMUNICATIONS DEVICES - Communications devices are adapted to receive a plurality of RF bursts of a radio block, where the plurality of RF bursts includes a number of RF bursts less than a total number of RF bursts for the radio block. A header can be decoded from the received plurality of RF burst. From the decoded header, a determination may be made whether the radio block is intended for the communications device or for another device. According to at least some examples, if the radio block is determined to be intended for another device, at least a portion of a receiver circuit of the communications device can be powered down. Also, according to at least some examples, if the radio block is determined to be intended for the receiving communications device, a data payload of the radio block may be decoded. Other aspects, embodiments, and features are also claimed and described. | 03-06-2014 |
20140112161 | QUANTITATIVE INTERFERENCE DETECTION - A method for wireless communications is described. The method includes beginning a voice call using a voice services over adaptive multi-user channels on one slot receiver. Pilot signal knowledge is obtained. Interferers knowledge is also obtained. Error metrics are computed using the pilot signal knowledge and the interferers knowledge. The method further includes selecting between the voice services over adaptive multi-user channels on one slot receiver and a legacy receiver for the voice call based on the error metrics. Other aspects, embodiments and features are also claimed and described. | 04-24-2014 |
20140325321 | PUNCTURING SCHEME BASED DECODER OPTIMIZATIONS - Systems and methods for decoding bitstreams are described. The bitstreams may be encoded using a punctured convolution code and received from a wireless network. A puncture pattern associated with a modulation and coding scheme used to encode the bitstream is determined, and punctured log-likelihood ratios (LLRs) generated from the bitstream are ignored while decoding the bitstream. The puncture pattern may be characterized by one or more algorithms that identify punctured LLRs in a repetitive sequence of LLRs. A decoder may exclude punctured LLRs from calculations related to bitstream decoding. The decoder may comprise a Viterbi decoder or an algebraic decoder. Other aspects, embodiments, and features are also claimed and described. | 10-30-2014 |
20150215880 | DEVICES AND METHODS FOR LOCATING RECEIVED TONES IN WIRELESS COMMUNICATIONS SYSTEMS - Access terminals are adapted to determine a tone location even when the tone is asymmetric. According to one example, an access terminal can obtain a plurality of samples for a received tone. The access terminal may detect which sample of the plurality of samples exhibits a maximum correlation value. The access terminal may further determine a location of the received tone based on the sample exhibiting the maximum correlation value. In some examples, the location of the received tone may be determine based on the sample exhibiting the maximum correlation value when a predicted signal-to-noise ratio (SNR) is above a predetermined threshold. Otherwise, the access terminal may determine the tone location based on a central location between a first sample with a correlation value above a predefined threshold and a first subsequent sample with a correlation value below the predefined threshold. Other aspects, embodiments, and features are also included. | 07-30-2015 |
20150222459 | METHODS AND DEVICES FOR DYNAMIC FILTER CONFIGURATION IN THE PRESENCE OF ADJACENT CHANNEL INTERFERENCE (ACI) - Apparatus and methods enable rejection of adjacent channel interference (ACI) in a way that mitigates reductions in performance, such as increased bit error rates, which might otherwise occur with conventional filtering algorithms used to combat ACI. For example, a filter or a filter stage may be shifted in frequency by an amount that corresponds to a measured power of the ACI. In some examples, the amount to shift the filter may correspond to a carrier to interference (C/I) ratio, which itself is based in part on the ACI. In some examples, the amount to shift the filter may further depend on the noise power in the wireless channel, since a lesser shift of the filter frequency may be beneficial in noisy environments. | 08-06-2015 |