Patents by Inventor Mehraban Iraninejad
Mehraban Iraninejad 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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Patent number: 8320373Abstract: A packet-based processing system suitable for various applications, such as for a base station or a terminal in a wireless communication system, is described. The packet-based processing system may include multiple processing modules and at least one transport module. The processing modules may send packets to one another via a common packet interface and may operate asynchronously. The transport module(s) may forward the packets sent by the processing modules and may operate asynchronously with respect to the processing modules. Each processing module may include a network interface, at least one buffer, a packet parser, a packet builder, and at least one processing unit. Each processing module may support at least one service. Each packet may include a header and a payload. The header may include a source service address for a source service sending the packet and a destination service address for a recipient service receiving the packet.Type: GrantFiled: August 19, 2008Date of Patent: November 27, 2012Assignee: QUALCOMM IncorporatedInventors: Mehraban Iraninejad, Jeff Levin, Michael-David N. Canoy, Michael Alexander Howard, Noam A. Ziv, Rohan Sudhakar Salvi
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Patent number: 8264975Abstract: Techniques for estimating thermal noise and rise-over-thermal (RoT) in a communication system are described. Thermal noise in a sideband may be measured and used as an estimate of thermal noise in a signal band. In one design, samples containing a desired signal centered at DC or a frequency higher than DC may be partitioned into blocks of K samples. Each block of K samples may be transformed with an FFT to obtain a corresponding block of K transform coefficients for K frequency bins. The power of transform coefficients for frequency bins in the sideband may be computed. Thermal noise may be estimated based on power values for the frequency bins in the sideband. Power values for frequency bins in the signal band may also be obtained and used to estimate total received power. RoT may then be estimated based on the estimated thermal noise and the estimated total received power.Type: GrantFiled: September 30, 2008Date of Patent: September 11, 2012Assignee: QUALCOMM IncorporatedInventors: Lu Yuan, Danlu Zhang, Mehraban Iraninejad, Sharad Sambhwani
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Patent number: 8254502Abstract: The present patent application discloses a method and apparatus for decoding, comprising decoding signals iteratively, mutually exchanging extrinsic information, calculating APP LLRs for both systematic and parity bits and making a hard decision after a plurality of iterations is completed based on accumulated soft information. The present patent application also discloses a method and apparatus for post decoding soft interference canceling, comprising generating updated a posteriori probabilities for systematic and parity bits from a turbo decoder, mapping the posteriori probabilities to soft symbols, quantizing the soft symbols, re-encoding a data packet, filtering a chip sequence, reconstructing an interference waveform, and scaling reconstruction filter coefficients using the symbols.Type: GrantFiled: June 18, 2009Date of Patent: August 28, 2012Assignee: QUALCOMM IncorporatedInventors: Sharad D. Sambhwani, Wei Zeng, Wei Zhang, Jan K Wegrzyn, Mehraban Iraninejad
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Patent number: 8254279Abstract: Techniques for estimating thermal noise and rise-over-thermal (RoT) in a communication system are described. In an aspect, thermal noise in a sideband may be measured and used to estimate thermal noise in a signal band. In one design, received power in the sideband may be measured, e.g., by computing total power of FFT transform coefficients within the sideband. Thermal noise may be estimated based on (e.g., by filtering) the measured received power in the sideband. Received power in the signal band may also be measured. Total received power may be estimated based on (e.g., by filtering) the measured received power in the signal band. RoT may then be estimated based on the estimated thermal noise and the estimated total received power. The estimated RoT may be used to estimate an available load for a cell, which may be used to admit and/or schedule users in the cell.Type: GrantFiled: April 21, 2008Date of Patent: August 28, 2012Assignee: QUALCOMM IncorporatedInventors: Charles E. Wheatley, III, Avneesh Agrawal, Danlu Zhang, Sharad Deepak Sambhwani, Lu Yuan, Mehraban Iraninejad
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Publication number: 20100158161Abstract: The present patent application discloses a method and apparatus for decoding, comprising decoding signals iteratively, mutually exchanging extrinsic information, calculating APP LLRs for both systematic and parity bits and making a hard decision after a plurality of iterations is completed based on accumulated soft information. The present patent application also discloses a method and apparatus for post decoding soft interference canceling, comprising generating updated a posteriori probabilities for systematic and parity bits from a turbo decoder, mapping the posteriori probabilities to soft symbols, quantizing the soft symbols, re-encoding a data packet, filtering a chip sequence, reconstructing an interference waveform, and scaling reconstruction filter coefficients using the symbols.Type: ApplicationFiled: June 18, 2009Publication date: June 24, 2010Applicant: QUALCOMM IncorporatedInventors: Sharad D. Sambhwani, Wei Zeng, Wei Zhang, Jan Krzys Wegrzyn, Mehraban Iraninejad
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Publication number: 20090207746Abstract: Techniques for estimating thermal noise and rise-over-thermal (RoT) in a communication system are described. Thermal noise in a sideband may be measured and used as an estimate of thermal noise in a signal band. In one design, samples containing a desired signal centered at DC or a frequency higher than DC may be partitioned into blocks of K samples. Each block of K samples may be transformed with an FFT to obtain a corresponding block of K transform coefficients for K frequency bins. The power of transform coefficients for frequency bins in the sideband may be computed. Thermal noise may be estimated based on power values for the frequency bins in the sideband. Power values for frequency bins in the signal band may also be obtained and used to estimate total received power. RoT may then be estimated based on the estimated thermal noise and the estimated total received power.Type: ApplicationFiled: September 30, 2008Publication date: August 20, 2009Applicant: QUALCOMM IncorporatedInventors: Lu Yuan, Danlu Zhang, Mehraban Iraninejad, Sharad Sambhwani
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Publication number: 20090080429Abstract: A packet-based processing system suitable for various applications, such as for a base station or a terminal in a wireless communication system, is described. The packet-based processing system may include multiple processing modules and at least one transport module. The processing modules may send packets to one another via a common packet interface and may operate asynchronously. The transport module(s) may forward the packets sent by the processing modules and may operate asynchronously with respect to the processing modules. Each processing module may include a network interface, at least one buffer, a packet parser, a packet builder, and at least one processing unit. Each processing module may support at least one service. Each packet may include a header and a payload. The header may include a source service address for a source service sending the packet and a destination service address for a recipient service receiving the packet.Type: ApplicationFiled: August 19, 2008Publication date: March 26, 2009Applicant: QUALCOMM IncorporatedInventors: Mehraban Iraninejad, Jeff Levin, Michael-David N. Canoy, Michael Alexander Howard, Noam A. Ziv, Rohan Sudhakar Salvi
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Publication number: 20080267086Abstract: Techniques for estimating thermal noise and rise-over-thermal (RoT) in a communication system are described. In an aspect, thermal noise in a sideband may be measured and used to estimate thermal noise in a signal band. In one design, received power in the sideband may be measured, e.g., by computing total power of FFT transform coefficients within the sideband. Thermal noise may be estimated based on (e.g., by filtering) the measured received power in the sideband. Received power in the signal band may also be measured. Total received power may be estimated based on (e.g., by filtering) the measured received power in the signal band. RoT may then be estimated based on the estimated thermal noise and the estimated total received power. The estimated RoT may be used to estimate an available load for a cell, which may be used to admit and/or schedule users in the cell.Type: ApplicationFiled: April 21, 2008Publication date: October 30, 2008Applicant: QUALCOMM IncorporatedInventors: Charles E. Wheatley, Avneesh Agrawal, Danlu Zhang, Sharad Deepak Sambhwani, Lu Yuan, Mehraban Iraninejad
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Patent number: 7333614Abstract: A system and method for encrypting all channels of a wireless spread spectrum communication at the chip level. The PN sequence is encrypted with one or more encryption sequences and then used to spread the signal.Type: GrantFiled: November 16, 2001Date of Patent: February 19, 2008Assignee: QUALCOMM IncorporatedInventors: Tad Jarosinski, Daniel H. Agre, Stephen S. Carter, Mehraban Iraninejad, Joseph P. Odenwalder, Roy Franklin Quick, Charles E. Wheatley
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Patent number: 6754509Abstract: The dual microprocessor system includes one microprocessor configured to perform wireless telephony functions and another configured to perform personal digital assistant (PDA) functions and other non-telephony functions. A memory system and a digital signal processor (DSP) are shared by the microprocessors. By providing a shared memory system, data required by both data microprocessors is conveniently available to both of the microprocessors and their peripheral components thereby eliminating the need to provide separate memory subsystems and further eliminating the need to transfer data back and forth between the separate memory subsystems. By providing a shared DSP, separate DSP devices need not be provided, yet both microprocessors can take advantage of the processing power of the DSP. In a specific example described herein, the microprocessors selectively program the DSP to perform, for example, vocoder functions, voice recognition functions, handwriting recognition functions, and the like.Type: GrantFiled: December 30, 1999Date of Patent: June 22, 2004Assignee: Qualcomm, IncorporatedInventors: Safi Khan, Sanjay Jha, Albert Scott Ludwin, Mehraban Iraninejad, Raghu Sankuratri, Chauhung Lee, Richard Higgins, Nicholas K. Yu
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Publication number: 20030095662Abstract: A system and method for encrypting all channels of a wireless spread spectrum communication at the chip level. The PN sequence is encrypted with one or more encryption sequences and then used to spread the signal.Type: ApplicationFiled: November 16, 2001Publication date: May 22, 2003Inventors: Tad Jarosinski, Daniel H. Agre, Stephen S. Carter, Mehraban Iraninejad, Joseph P. Odenwalder, Roy Franklin Quick, Charles E. Wheatley
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Patent number: 6519237Abstract: A method to expediently perform search/correlation operation between an internal pilot pseudonoise (PN) sequence and an incoming pilot PN sequence. This operation is used to acquire base stations in a Code Division Multiple Access (CDMA) system. In one embodiment, the present invention recites a method comprising several steps. First, a plurality of PN sequence values are provided internally and an input signal sample is received. The input signal sample is correlated, in parallel, with the plurality of PN sequence values. The correlation operation is performed at a rate equivalent to the input sample rate times the number of PN sequence values being correlated in parallel, assuming a resolution of one. The resultant products are respectively summed and stored in a plurality of accumulators.Type: GrantFiled: May 28, 1999Date of Patent: February 11, 2003Assignee: Koninklijke Philips Electronics N.V.Inventors: John McDonough, Mehraban Iraninejad