Patents by Inventor Ozgur Dural
Ozgur Dural 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: 20130114436Abstract: Methods, systems, and devices for increasing reverse link throughput by coordination of multiple wireless systems using reverse link blanking are provided. Some embodiments involve utilizing the bandwidth of one carrier bandwidth that partially overlaps with the bandwidth of another carrier bandwidth. This overlap may create interference. Different indicators may be utilized to prompt a device, such as a mobile device, to coordinate reverse link transmission blanking on at least one of the carrier bandwidths to increase throughput for the other overlapping carrier bandwidth. For example, a base station may transmit such an indicator to the mobile device to prompt the transmission blanking. Some embodiments also include increasing transmission power for the overlapping carrier bandwidth during the transmission blanking of other carrier bandwidth. Some embodiments utilize flexible carrier bandwidths systems that may utilize portions of spectrum that may not be big enough to fit a normal bandwidth waveform.Type: ApplicationFiled: April 26, 2012Publication date: May 9, 2013Applicant: QUALCOMM INCORPORATEDInventors: Ozgur DURAL, Soumya DAS, Edwin C. PARK
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Patent number: 8355666Abstract: In embodiments, an adaptive tone erasure technique is applied to orthogonal frequency division multiplexing (OFDM) communications, such as ECMA-368 standard ultra-wideband (UWB) communications. A transmitter obtains jammed sub-carrier information and calculates an erasure mask. The jammed sub-carriers are nulled before transmitting to a receiver. In accordance with the erasure mask, bits falling on the jammed sub-carriers are replaced by erasure bits before interleaving, keeping the interleaver block size constant notwithstanding variations in the number of the jammed sub-carriers. The receiver also obtains the jammed sub-carrier information and the erasure mask. After the receiver deinterleaves the constant size blocks, it decodes the data without the erasure bits. The transmitter may detect the jammed sub-carriers itself, or obtain the information from the receiver. The receiver similarly may detect the jammed sub-carriers itself, or obtain the information from the transmitter.Type: GrantFiled: September 10, 2008Date of Patent: January 15, 2013Assignee: Qualcomm IncorporatedInventors: Amol Rajkotia, Yuheng Huang, Ozgur Dural
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Patent number: 8249005Abstract: Systems and methods are provided for selecting transmission parameters used in the transmission of a communication signal in a wireless communications device. In one embodiment, a computer-implemented method for determining a convolutional code constraint length and/or a modulation type is provided. The method includes obtaining a channel condition for a channel associated with transmission of the communication signal. Based at least in part on the channel condition, the method includes selecting a convolutional code constraint length and/or a modulation type for transmitting the communications signal. In some embodiments, the method also includes selecting a data rate for transmitting the communications signal.Type: GrantFiled: May 6, 2009Date of Patent: August 21, 2012Assignee: Qualcomm IncorporatedInventors: Samir Soliman, Ozgur Dural
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Publication number: 20120198315Abstract: Systems and methods are provided for selecting transmission parameters used in the transmission of a communication signal in a wireless communications device. In one embodiment, a computer-implemented method for determining a convolutional code constraint length and/or a modulation type is provided. The method includes obtaining a channel condition for a channel associated with transmission of the communication signal. Based at least in part on the channel condition, the method includes selecting a convolutional code constraint length and/or a modulation type for transmitting the communications signal. In some embodiments, the method also includes selecting a data rate for transmitting the communications signal. Other aspects, embodiments, and features are also claimed and described.Type: ApplicationFiled: April 12, 2012Publication date: August 2, 2012Applicant: QUALCOMM INCORPORATEDInventors: Samir Soliman, Ozgur Dural
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Publication number: 20120177138Abstract: Techniques for rotating and transmitting multidimensional constellations are disclosed. A method for rotating a multidimensional constellation may include constructing a first rotation matrix, constructing a second rotation matrix, applying orthogonality constraints to the first and second rotation matrices; selecting an optimizing rotation matrix from the first and second rotation matrices; and rotating the multidimensional constellation using the optimizing rotation matrix. Constructing the first rotation matrix and second rotation matrices may include constructing a first column that includes first matrix dements based on the number of axes in the multidimensional constellation, and additional columns that include permutations of the first matrix elements.Type: ApplicationFiled: March 20, 2012Publication date: July 12, 2012Applicant: QUALCOMM INCORPORATEDInventors: Rabih Chrabieh, Ozgur Dural
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Publication number: 20120128035Abstract: Low-power transmitter and/or receiver devices are provided by sacrificing time and/or frequency diversity in exchange for lower power consumption. When channel conditions indicate that time and/or frequency spreading are unnecessary for transmissions, a transmitter may enter into a power-conservation mode in which transmissions are performed using a time gating scheme or a time repetition scheme. In the time gating scheme, symbols are transmitting just once, rather than a plurality of times, but with increased transmission power. In the time repetition scheme, copies of the same symbol are transmitted a plurality of times on the same frequency on different symbol transmission periods, instead of being retransmitted on different frequencies on different symbol transmission periods. Consequently, the symbol can be generated once and stored for subsequent retransmission, thereby allowing some of the transmitter/receiver chain components can be operated at a lower duty cycle or processing speed to conserve power.Type: ApplicationFiled: January 24, 2012Publication date: May 24, 2012Applicant: QUALCOMM INCORPORATEDInventors: Samir Soliman, Ozgur Dural, Krishnan Rajamani, Rabih Chrabieh
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Patent number: 8135015Abstract: A method of transmitting a data frame is disclosed and may include transmitting a preamble, transmitting a physical layer convergence protocol (PLCP) header, and transmitting a plurality of MAC protocol data units (MPDUs). Each MPDU may be configured to reset a convolutional decoder state after each MPDU. The method may also include transmitting an MPDU aggregation header. The MPDU aggregation header may include a count of packed MPDUs, an array of offsets, an array of lengths, a frame check sequence (FCS) for the MPDU aggregation header, a group of tail bits, or a combination thereof. Further, an end of the MPDU aggregation header may be aligned to an interleaved symbol boundary.Type: GrantFiled: March 27, 2009Date of Patent: March 13, 2012Assignee: Qualcomm IncorporatedInventors: Amol Rajkotia, Krishnan Rajamani, Ozgur Dural, Samir Soliman
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Patent number: 8107561Abstract: A method for performing carrier frequency offset estimation and frame synchronization is disclosed herein. In one approach, the method includes performing a first level frequency discrimination on at least one estimated channel tap to generate a frequency discriminated value; estimating a phase error from the frequency discriminated value; and, determining a predetermined frame synchronization pattern from the estimated phase error. A computer program product having code and a wireless communications apparatus for performing the method are also described herein.Type: GrantFiled: October 26, 2007Date of Patent: January 31, 2012Assignee: QUALCOMM IncorporatedInventors: Yuheng Huang, Ozgur Dural, Samir S. Soliman, Amol Rajkotia
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Patent number: 8102929Abstract: Low-power transmitter and/or receiver devices are provided by sacrificing time and/or frequency diversity in exchange for lower power consumption. When channel conditions indicate that time and/or frequency spreading are unnecessary for transmissions, a transmitter may enter into a power-conservation mode in which transmissions are performed using a time gating scheme or a time repetition scheme. In the time gating scheme, symbols are transmitting just once, rather than a plurality of times, but with increased transmission power. In the time repetition scheme, copies of the same symbol are transmitted a plurality of times on the same frequency on different symbol transmission periods, instead of being retransmitted on different frequencies on different symbol transmission periods. Consequently, the symbol can be generated once and stored for subsequent retransmission, thereby allowing some of the transmitter/receiver chain components can be operated at a lower duty cycle or processing speed to conserve power.Type: GrantFiled: February 12, 2009Date of Patent: January 24, 2012Assignee: QUALCOMM IncorporatedInventors: Samir Soliman, Ozgur Dural, Krishnan Rajamani, Rabih Chrabieh
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Patent number: 8045631Abstract: An apparatus for detecting an OFDM symbol encoded with a transmitted sequence including a filter having coefficients based on a simplified version of the transmitted sequence is disclosed. A computer program product having code and a wireless communications apparatus for performing the method are also described herein.Type: GrantFiled: October 26, 2007Date of Patent: October 25, 2011Assignee: QUALCOMM, IncorporatedInventors: Yuheng Huang, Ozgur Dural, Samir S. Soliman, Amol Rajkotia
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Patent number: 7974329Abstract: A method for performing symbol timing estimation is disclosed herein. In one approach, the method includes defining a search space in a plurality of estimated magnitudes of channel taps; defining a search window in the search space; and locating a symbol timing estimate index in the search space corresponding to a maximum value of an energy of the plurality of estimated magnitudes of channel taps within the search window. A computer program product having code and a wireless communications apparatus for performing the method are also described herein.Type: GrantFiled: October 26, 2007Date of Patent: July 5, 2011Assignee: QUALCOMM, IncorporatedInventors: Yuheng Huang, Ozgur Dural, Samir S. Soliman, Amol Rajkotia
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Publication number: 20110110254Abstract: Methods and apparatuses are provided that facilitate measuring frequencies for cell reselection. A base station providing a cell can be interfered by one or more closed subscriber group (CSG) cells over at least a portion of frequency utilized by the base station to serve one or more devices. The base station can determine and provide one or more parameters related to performing a measurement of a system bandwidth to one or more devices that are within range of the one or more CSG cells that includes at least a portion of the bandwidth utilized by the one or more CSG cells. The one or more devices can accordingly perform measurements of the system bandwidth of the base station for determining one or more communication metrics related to performing reselection and/or measuring other frequencies for reselection. The measurement can relate to a wideband measurement, a plurality of narrowband measurements, etc.Type: ApplicationFiled: November 8, 2010Publication date: May 12, 2011Applicant: QUALCOMM IncorporatedInventors: Tingfang Ji, Peter Gaal, Rajat Prakash, Ozgur Dural, Ravi Palanki
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Publication number: 20110080868Abstract: A method, an apparatus, and a machine-readable medium are provided for wireless communication in which at least two modems are selected from a set of modems for the wireless communication based on quality of service requirements for and an energy consumption of the wireless communication. In addition, the selected at least two modems are utilized concurrently for the wireless communication.Type: ApplicationFiled: October 1, 2009Publication date: April 7, 2011Applicant: QUALCOMM INCORPORATEDInventors: Dilip Krishnaswamy, Soumya Das, Amol Rajkotia, Krishnan Rajamani, Ozgur Dural
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Publication number: 20100246543Abstract: A method of transmitting a data frame is disclosed and may include transmitting a preamble, transmitting a physical layer convergence protocol (PLCP) header, and transmitting a plurality of MAC protocol data units (MPDUs). Each MPDU may be configured to reset a convolutional decoder state after each MPDU. The method may also include transmitting an MPDU aggregation header. The MPDU aggregation header may include a count of packed MPDUs, an array of offsets, an array of lengths, a frame check sequence (FCS) for the MPDU aggregation header, a group of tail bits, or a combination thereof. Further, an end of the MPDU aggregation header may be aligned to an interleaved symbol boundary.Type: ApplicationFiled: March 27, 2009Publication date: September 30, 2010Applicant: QUALCOMM INCORPORATEDInventors: Amol Rajkotia, Krishnan Rajamani, Ozgur Dural, Samir Soliman
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Publication number: 20100227561Abstract: Systems and methods for decreasing the amount of information sent on a feedback channel are disclosed. Spectral binning and/or a Markov state model may be used to reduce the amount of information sent on the feedback channel.Type: ApplicationFiled: March 2, 2010Publication date: September 9, 2010Applicant: QUALCOMM IncorporatedInventors: Kaushik Chakraborty, Soumya Das, Ozgur Dural, Krishnan Rajamani, Samir S. Soliman
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Publication number: 20100226269Abstract: Systems and methods for decreasing the amount of information sent on a feedback channel are disclosed. A hierarchical tree structure may be used to reduce the amount of information sent on the feedback channel. Spectral binning may also be used in conjunction with the hierarchical tree structure.Type: ApplicationFiled: March 2, 2010Publication date: September 9, 2010Applicant: QUALCOMM IncorporatedInventors: Kaushik Chakraborty, Soumya Das, Ozgur Dural, Krishnan Rajamani, Samir S. Soliman
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Publication number: 20100226315Abstract: Systems and methods for extending header fields are disclosed. The header field may be extended without changing the current size of the header. Reserve bits may be used to indicate the use of an extended header and the extended header may be store in a variety of locations within the frame, including the frame payload or pad bits.Type: ApplicationFiled: March 2, 2010Publication date: September 9, 2010Applicant: QUALCOMM IncorporatedInventors: Soumya Das, Kaushik Chakroborty, Krishnan Rajamani, Ozgur Dural, Samir S. Soliman
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Publication number: 20100226452Abstract: Systems and methods for decreasing the amount of information sent on a feedback channel are disclosed. Various forms of spectral binning may be used to reduce the amount of information sent on the feedback channel. The systems and methods may be applicable to wideband communication systems, ultra-wideband communication systems, and/or other communication system using multiple carrier frequencies (e.g., tones).Type: ApplicationFiled: March 2, 2010Publication date: September 9, 2010Applicant: QUALCOMM IncorporatedInventors: Kaushik Chakraborty, Soumya Das, Ozgur Dural, Krishnan Rajamani, Samir S. Soliman
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Publication number: 20100202493Abstract: Low-power transmitter and/or receiver devices are provided by sacrificing time and/or frequency diversity in exchange for lower power consumption. When channel conditions indicate that time and/or frequency spreading are unnecessary for transmissions, a transmitter may enter into a power-conservation mode in which transmissions are performed using a time gating scheme or a time repetition scheme. In the time gating scheme, symbols are transmitting just once, rather than a plurality of times, but with increased transmission power. In the time repetition scheme, copies of the same symbol are transmitted a plurality of times on the same frequency on different symbol transmission periods, instead of being retransmitted on different frequencies on different symbol transmission periods. Consequently, the symbol can be generated once and stored for subsequent retransmission, thereby allowing some of the transmitter/receiver chain components can be operated at a lower duty cycle or processing speed to conserve power.Type: ApplicationFiled: February 12, 2009Publication date: August 12, 2010Applicant: QUALCOMM INCORPORATEDInventors: Samir Soliman, Ozgur Dural, Krishnan Rajamani, Rabih Chrabieh
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Publication number: 20100202334Abstract: Systems and methods are provided for selecting transmission parameters used in the transmission of a communication signal in a wireless communications device. In one embodiment, a computer-implemented method for determining a convolutional code constraint length and/or a modulation type is provided. The method includes obtaining a channel condition for a channel associated with transmission of the communication signal. Based at least in part on the channel condition, the method includes selecting a convolutional code constraint length and/or a modulation type for transmitting the communications signal. In some embodiments, the method also includes selecting a data rate for transmitting the communications signal.Type: ApplicationFiled: May 6, 2009Publication date: August 12, 2010Applicant: QUALCOMM IncorporatedInventors: Samir Soliman, Ozgur Dural