Patents by Inventor Cetin Altan
Cetin Altan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20170054585Abstract: Enhancing mobile communication performance under Voice services over Adaptive Multi-user channels on One Slot (VAMOS) pairing with receiving a multiplexed signal, wherein the multiplexed signal includes a first user signal having a first amplitude and a second user signal having a second amplitude, computing a subchannel power imbalance ratio (SCPIR) based on the first amplitude of the first user signal and the second amplitude of the second user signal, performing a channel estimation for the first user signal and the second user signal, obtaining at least one channel parameter from the channel estimation, and performing a user signal demodulation for the first user signal or the second user signal using the at least one channel parameter.Type: ApplicationFiled: August 17, 2015Publication date: February 23, 2017Inventors: Cetin Altan, Hassan Rafique, Divaydeep Sikri, Zhi-Zhong Yu
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Patent number: 9407300Abstract: Aspects of the present disclosure provides a wireless communication apparatus configured to handle adjacent-channel interference (ACI) and spur. The apparatus receives a signal utilizing a communication interface. The apparatus is configured to perform a single discrete Fourier transform (DFT) on the signal to generate frequency domain data. The apparatus is further configured to determine respective energy of a plurality of adjacent channels of the signal utilizing the frequency domain data. The apparatus is further configured to determine one or more potential interfering channels among the adjacent channels, wherein each of the potential interfering channels has an energy greater than a qualifying threshold. The apparatus is further configured to identify one or more dominant interfering channels from among the potential interfering channels. The apparatus is further configured to detect ACI based on the one or more dominant interfering channels.Type: GrantFiled: February 24, 2015Date of Patent: August 2, 2016Assignee: QUALCOMM IncorporatedInventors: Hassan Rafique, Divaydeep Sikri, Nico De Laurentiis, Cetin Altan, Antonio de Angelis
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Publication number: 20160112079Abstract: Aspects of the present disclosure provides a wireless communication apparatus configured to handle adjacent-channel interference (ACI) and spur. The apparatus receives a signal utilizing a communication interface. The apparatus is configured to perform a single discrete Fourier transform (DFT) on the signal to generate frequency domain data. The apparatus is further configured to determine respective energy of a plurality of adjacent channels of the signal utilizing the frequency domain data. The apparatus is further configured to determine one or more potential interfering channels among the adjacent channels, wherein each of the potential interfering channels has an energy greater than a qualifying threshold. The apparatus is further configured to identify one or more dominant interfering channels from among the potential interfering channels. The apparatus is further configured to detect ACI based on the one or more dominant interfering channels.Type: ApplicationFiled: February 24, 2015Publication date: April 21, 2016Inventors: Hassan Rafique, Divaydeep Sikri, Nico De Laurentiis, Cetin Altan, Antonio de Angelis
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Patent number: 9226213Abstract: 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.Type: GrantFiled: December 21, 2012Date of Patent: December 29, 2015Assignee: QUALCOMM IncorporatedInventors: Divaydeep Sikri, Hassan Rafique, Cetin Altan, Mungal Singh Dhanda, Zhi-Zhong Yu
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Publication number: 20150319743Abstract: Fast Associated Control Channel (FACCH) information is combined if a first block of FACCH information and a repeated block of FACCH information each fail a respective integrity check. An algorithm for realizing repeated FACCH diversity combining gains for different codec and discontinuous transmission (DTX) configurations is applicable to Full Rate codecs, Half Rate codecs, and discontinuous transmission scenarios. A pair of buffers may be used in a ping-pong fashion to store decoding soft or hard decisions for failed FACCH blocks.Type: ApplicationFiled: October 27, 2014Publication date: November 5, 2015Inventors: Farrukh Rashid, Divaydeep Sikri, Mukund Agarwal, Hassan Rafique, Cetin Altan
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Publication number: 20150289173Abstract: A method for performing cell reselection by a wireless communication device is described. The method includes monitoring one or more neighbor cells of a same radio access technology as a serving cell while camped on the serving cell. The method also includes determining that reselection criteria is met for a target cell. The method further includes starting a reselection timer for the target cell. The method additionally includes determining whether to perform reselection to the target cell based on a target cell signal to noise ratio (SNR) and a serving cell SNR.Type: ApplicationFiled: April 4, 2014Publication date: October 8, 2015Applicant: QUALCOMM IncorporatedInventors: Kunal Tyagi, Siddhant Mehrotra, Ravi Kanth Kotreka, Pankaj Bansal, Manjunatha Subbamma Ananda, Divaydeep Sikri, Cetin Altan, Abeezar Burhan
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Publication number: 20150215880Abstract: 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.Type: ApplicationFiled: January 28, 2014Publication date: July 30, 2015Applicant: QUALCOMM IncorporatedInventors: Hassan Rafique, Divaydeep Sikri, Cetin Altan
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Patent number: 8964617Abstract: Access terminals are adapted to regulate power in wireless receiver circuits. In one example, access terminals include a communications interface with at least one wireless receiver circuit. A processing circuit coupled with the communications interface can receive a transmission during a Frequency Correction Channel (FCCH) frame. Following the received transmission, at least a portion of the receiver circuit may be powered down. A determination may also be made whether the received transmission was reliable. The receiver circuit can subsequently be powered up, and another transmission can be received on a subsequent channel. When the received transmission was sufficiently reliable, the other transmission may be a transmission during a Synchronization Channel (SCH) frame. When the received transmission is not sufficiently reliable, the other transmission may be another transmission received during a subsequent Frequency Correction Channel (FCCH) frame.Type: GrantFiled: January 11, 2013Date of Patent: February 24, 2015Assignee: QUALCOMM IncorporatedInventors: Divaydeep Sikri, Farrukh Rashid, Helena Deirdre O'Shea, Cetin Altan, Wolfram Pieperhoff
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Publication number: 20130322313Abstract: Access terminals are adapted to regulate power in wireless receiver circuits. In one example, access terminals include a communications interface with at least one wireless receiver circuit. A processing circuit coupled with the communications interface can receive a transmission during a Frequency Correction Channel (FCCH) frame. Following the received transmission, at least a portion of the receiver circuit may be powered down. A determination may also be made whether the received transmission was reliable. The receiver circuit can subsequently be powered up, and another transmission can be received on a subsequent channel. When the received transmission was sufficiently reliable, the other transmission may be a transmission during a Synchronization Channel (SCH) frame. When the received transmission is not sufficiently reliable, the other transmission may be another transmission received during a subsequent Frequency Correction Channel (FCCH) frame.Type: ApplicationFiled: January 11, 2013Publication date: December 5, 2013Applicant: Qualcomm IncorporatedInventors: Divaydeep Sikri, Farrukh Rashid, Helena Deirdre O'Shea, Cetin Altan, Wolfram Pieperhoff
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Patent number: 8576743Abstract: Estimating an unknown frequency error of a tone signal may comprise sampling, within an error bandwidth, wireless signals including the tone signal that occupy the error bandwidth to generate signal samples, and repeatedly, for different frequency offsets: applying a frequency offset to the signal samples to produce offset values that represent the signals occupying an offset bandwidth equal to the error bandwidth offset by an offset frequency; estimating, within a frequency estimation range less than the error bandwidth, a tone frequency error using the offset values; and measuring a signal-to-noise ratio of the tone signal using the signal samples and the estimated tone frequency error. Other aspects, embodiments, and features are also claimed and discussed.Type: GrantFiled: December 21, 2011Date of Patent: November 5, 2013Assignee: QUALCOMM IncorporatedInventors: Divaydeep Sikri, Hassan Rafique, Cetin Altan
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Publication number: 20120327793Abstract: Estimating an unknown frequency error of a tone signal may comprise sampling, within an error bandwidth, wireless signals including the tone signal that occupy the error bandwidth to generate signal samples, and repeatedly, for different frequency offsets: applying a frequency offset to the signal samples to produce offset values that represent the signals occupying an offset bandwidth equal to the error bandwidth offset by an offset frequency; estimating, within a frequency estimation range less than the error bandwidth, a tone frequency error using the offset values; and measuring a signal-to-noise ratio of the tone signal using the signal samples and the estimated tone frequency error. Other aspects, embodiments, and features are also claimed and discussed.Type: ApplicationFiled: December 21, 2011Publication date: December 27, 2012Applicant: QUALCOMM IncorporatedInventors: Divaydeep Sikri, Hassan Rafique, Cetin Altan