Patents by Inventor Moussa Abdi
Moussa Abdi 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: 20160381592Abstract: A computer implemented method of providing RSTD data comprising receiving an uncertainty window centered around an expected RSTD value, determining the PDP of each reference OFDM symbol within the uncertainty window, obtaining a main PDP by calculating a parameter indicative of signal quality for each determined PDP, the main PDP having the highest signal quality, obtaining a preceding PDP of the Main PDP, obtaining a succeeding PDP of the Main PDP, determining PDP metrics comprising, determining a channel metric for each of the main, preceding and succeeding PDPs, determining a channel main tap for each of the main, preceding and succeeding PDPs, determining a delay estimate for each of the main, preceding and succeeding PDPs, wherein if the main PDP is a combined PDP, performing coherence testing on the PDP metrics to detect any ambiguity in the delay estimate of the main PDP, and correcting any ambiguity.Type: ApplicationFiled: June 23, 2016Publication date: December 29, 2016Inventors: Van Minh Nguyen, Moussa Abdi, Alain Kouioumdjian, Aymane Hamahmy, Imran Latif, Serdar Sezginer
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Publication number: 20160316445Abstract: A computer implemented method for providing OTDOA timing information comprising defining an FFT window pair for estimating a value of reference signal time difference “RSTD” for at least one base station and a reference cell, receiving a PRS from the at least one base station and the reference cell, executing an FFT per OFDM symbol of the PRS for each FFT window of the FFT window pair, obtaining a first FFT output vector per OFDM symbol of each FFT window, for each first output vector, descrambling tones corresponding to the known position of the PRS, wherein all other tones are set to zero, combining vectors based on respective first FFT output vectors, executing an iFFT to convert to the time domain; and calculating an estimated value of reference signal time difference “RSTD” for the at least one base station and the reference cell.Type: ApplicationFiled: April 22, 2016Publication date: October 27, 2016Inventors: Moussa Abdi, Serdar Sezginer, Alain Kouioumdjian, Imran Latif, Aymane Hamahmy, Bertrand Muquet
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Patent number: 9106288Abstract: The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval (TTI) may include numerous traffic symbols and one or more pilot symbols. A mobile terminal may generate, for a transmitter, sounding pilot information and map the sounding pilot information onto at least certain sub-carriers within a TTI. The one or more pilot symbols may include at least a first group of subcarriers and at least a second group of subcarriers. The first group of subcarriers may be sounding pilots and the second group of subcarriers may be pilots for demodulation. The second group may not include sounding pilots.Type: GrantFiled: September 23, 2014Date of Patent: August 11, 2015Assignee: Apple Inc.Inventors: Jianglei Ma, Ming Jia, Hua Xu, Wen Tong, Peiying Zhu, Moussa Abdi
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Patent number: 9008036Abstract: The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.Type: GrantFiled: December 20, 2012Date of Patent: April 14, 2015Assignee: Apple Inc.Inventors: Jianglei Ma, Ming Jia, Hua Xu, Wen Tong, Peiying Zhu, Moussa Abdi
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Publication number: 20150049738Abstract: The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.Type: ApplicationFiled: September 25, 2014Publication date: February 19, 2015Inventors: Jianglei Ma, Ming Jia, Hua Xu, Wen Tong, Peiying Zhu, Moussa Abdi
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Publication number: 20150016394Abstract: The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.Type: ApplicationFiled: September 29, 2014Publication date: January 15, 2015Inventors: Jianglei Ma, Ming Jia, Hua Xu, Wen Tong, Peiying Zhu, Moussa Abdi
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Publication number: 20150010097Abstract: The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.Type: ApplicationFiled: September 23, 2014Publication date: January 8, 2015Inventors: Jianglei Ma, Ming Jia, Hua Xu, Wen Tong, Peiying Zhu, Moussa Abdi
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Patent number: 8532082Abstract: A method and system for wireless frequency division multiple access communications in the uplink and/or downlink directions. A first time duration for transmission of a data payload block is established, and the transmission is processed using a first frequency domain or a time domain. A second time duration for transmission of at least one pilot block is established, and the transmission is processed using a second frequency domain or the time domain, the second time duration is not greater than the first time duration.Type: GrantFiled: April 9, 2012Date of Patent: September 10, 2013Assignee: Research In Motion LimitedInventors: Jianglei Ma, Ming Jia, Wen Tong, Peiying Zhu, Hua Xu, Moussa Abdi, Evelyne Lestrat, Sarah Boumendil
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Patent number: 8363739Abstract: The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.Type: GrantFiled: September 29, 2006Date of Patent: January 29, 2013Assignee: Apple Inc.Inventors: Jianglei Ma, Ming Jia, Hua Xu, Wen Tong, Peiying Zhu, Moussa Abdi
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Publication number: 20120188881Abstract: Abstract Spatial multiplexing and transmit diversity can improve the capacity of a wireless communication system. The system and method adapts communication schemes for communication systems with multiple antennas utilizing at least two transmission modes. The at least two transmission modes can, but are not necessarily, used for uplink communications. The two transmission modes may be chosen from the group consisting of a single antenna mode, a diversity mode a spatial multiplexed mode and a mixed diversity and spatial multiplexed mode. The at least two transmission modes may involve adaptation among multiple transmitters. At least one receiver may indicate a transmission mode to be used by a transmitter for a subsequent transmission. A transmitter may determine a transmission mode to be used for a subsequent transmission. The transmission mode can be based on channel sounding.Type: ApplicationFiled: April 19, 2007Publication date: July 26, 2012Inventors: Jianglei Ma, Ming Jia, Jianming Wu, Peiying Zhu, Wen Tong, Evelyne Le Strat, Sarah Boumendil, Moussa Abdi
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Publication number: 20120188946Abstract: A method and system for wireless frequency division multiple access communications in the uplink and/or downlink directions. A first time duration for transmission of a data payload block is established, and the transmission is processed using a first frequency domain or a time domain. A second time duration for transmission of at least one pilot block is established, and the transmission is processed using a second frequency domain or the time domain, the second time duration is not greater than the first time duration.Type: ApplicationFiled: April 9, 2012Publication date: July 26, 2012Applicant: ROCKSTAR BIDCO, L.P.Inventors: Jianglei MA, Ming JIA, Wen TONG, Peiying ZHU, Hua XU, Moussa ABDI, Evelyne LESTRAT, Sarah BOUMENDIL
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Patent number: 8169994Abstract: A method and system for wireless frequency division multiple access communications in the uplink and/or downlink directions, having an improved pilot insertion scheme for single carrier based communications is provided. A first time duration for transmission of a data payload block (7) is established, and the transmission is processed using a first frequency domain or a time domain. A second time duration for transmission of at least one pilot block (70) is established, and the transmission is processed using a second frequency domain or the time domain, the second time duration (70) is not greater than the first time duration (7).Type: GrantFiled: July 27, 2006Date of Patent: May 1, 2012Assignee: Rockstar Bidco LPInventors: Jianglei Ma, Ming Jia, Wen Tong, Peiying Zhu, Hua Xu, Moussa Abdi, Evelyne LeStrat, Sarah Boumendil
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Patent number: 8116353Abstract: A spread spectrum modulator converts input sequences composed of digital symbols into n?2 spread-spectrum sequences. The spread spectrum modulator can generate spreading code and can combine the spreading code with the input sequences to produce the n spread spectrum sequences for transmission from n respective antennas of a radio transmitter. Each spread spectrum sequence corresponds to a sum of at least two contributions mutually shifted by a time substantially less than the duration of a symbol, each contribution being the product of a version of one of the n input sequences times the spreading code.Type: GrantFiled: August 26, 2009Date of Patent: February 14, 2012Assignee: Alcatel LucentInventors: Hassan El Nahas El Homsi, Moussa Abdi, Alexandre Jard
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Publication number: 20100020853Abstract: A spread spectrum modulator converts input sequences composed of digital symbols into n?2 spread-spectrum sequences. The spread spectrum modulator can generate spreading code and can combine the spreading code with the input sequences to produce the n spread spectrum sequences for transmission from n respective antennas of a radio transmitter. Each spread spectrum sequence corresponds to a sum of at least two contributions mutually shifted by a time substantially less than the duration of a symbol, each contribution being the product of a version of one of the n input sequences times the spreading code.Type: ApplicationFiled: August 26, 2009Publication date: January 28, 2010Applicant: ALCATEL LUCENTInventors: Hassan EL NAHAS EL HOMSI, Moussa ABDI, Alexandre JARD
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Patent number: 7613230Abstract: In a spread spectrum digital radio communication receiver, a propagation profile of a propagation channel between a sender and the receiver, including at least one propagation path associated with a reception energy, is determined, data relating to an energy distribution in the propagation profile are measured, and information symbols carried by a signal received originating from the sender over the propagation channel are estimated, by applying to the signal a processing taking into account a predetermined maximum number of propagation paths, the propagation paths taken into account being chosen according to a criterion selected from several criteria as a function of the measured data relating to the energy distribution in the propagation profile.Type: GrantFiled: March 24, 2004Date of Patent: November 3, 2009Assignee: Alcatel LucentInventors: Alexandre Jard, Moussa Abdi, Hassan El Nahas El Homsi, Jean-Marc Corbel
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Patent number: 7583721Abstract: A spread spectrum modulator converts input sequences composed of digital symbols into n?2 spread-spectrum sequences. The spread spectrum modulator can generate spreading code and can combine the spreading code with the input sequences to produce the n spread spectrum sequences for transmission from n respective antennas of a radio transmitter. Each spread spectrum sequence corresponds to a sum of at least two contributions mutually shifted by a time substantially less than the duration of a symbol, each contribution being the product of a version of one of the n input sequences times the spreading code.Type: GrantFiled: May 6, 2004Date of Patent: September 1, 2009Assignee: Alcatel LucentInventors: Hassan El Nahas El Homsi, Moussa Abdi, Alexandre Jard
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Publication number: 20080247479Abstract: The present invention employs a pilot scheme for frequency division multiple access (FDM) communication systems, such as single carrier FDM communication systems. A given transmit time interval will include numerous traffic symbols and two or more short pilot symbols, which are spaced apart from one another by at least one traffic symbol and will have a Fourier transform length that is less than the Fourier transform length of any given traffic symbol. Multiple transmitters will generate pilot information and modulate the pilot information onto sub-carriers of the short pilot symbols in an orthogonal manner. Each transmitter may use different sub-carriers within the time and frequency domain, which is encompassed by the short pilot symbols within the transmit time interval. Alternatively, each transmitter may uniquely encode the pilot information using a unique code division multiplexed code and modulate the encoded pilot information onto common sub-carriers of the short pilot symbols.Type: ApplicationFiled: September 29, 2006Publication date: October 9, 2008Applicant: NORTEL NETWORKS LIMITEDInventors: Jianglei Ma, Ming Jia, Hua Xu, Wen Tong, Peiying Zhu, Moussa Abdi
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Publication number: 20080219235Abstract: A method and system for wireless frequency division multiple access communications in the uplink and/or downlink directions, having an improved pilot insertion scheme for single carrier based communications is provided. A first time duration for transmission of a data payload block (7) is established, and the transmission is processed using a first frequency domain or a time domain. A second time duration for transmission of at least one pilot block (70) is established, and the transmission is processed using a second frequency domain or the time domain, the second time duration (70) is not greater than the first time duration (7).Type: ApplicationFiled: July 27, 2006Publication date: September 11, 2008Applicant: NORTEL NETWORKS LIMITEDInventors: Jianglei Ma, Ming Jia, Wen Tong, Peiying Zhu, Hua Xu, Moussa Abdi, Evelyne Le Strat, Sarah Boumendil
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Patent number: 7184465Abstract: A signal received by a base station is fed to a set of filters matched to spreading codes allocated to pilot channels originating from radio terminals. The outputs from the matched filters are processed so as to estimate parameters comprising, for each channel, eigenvectors representing propagation paths associated with respective amplitudes of reception along these paths. The processing of the output signals from the matched filters comprises an estimation of parameters for a first channel received with a fairly high power by the base station, a correction of the output from the matched filter of a second channel having less energy, taking account of at least one of the eigenvectors of the first channel, and an estimation of parameters for this second channel on the basis of the modified output from said matched filter.Type: GrantFiled: June 5, 2002Date of Patent: February 27, 2007Assignee: Nortel Networks LimitedInventors: Alexandre Jard, Hassan El Nahas El Homsi, Moussa Abdi
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Publication number: 20070025425Abstract: A spread_spectrum modulator converts input sequences composed of digital symbols into n?2 spread-spectrum sequences. It comprises a spreading code generator and means of combining the spreading code with the input sequences so as to produce the n spread_spectrum sequences for transmission from n respective antennas of a radio transmitter. Each spread_spectrum sequence corresponds to a sum of at least two contributions mutually shifted by a time substantially less than the duration of a symbol, each contribution being the product of a version of one of the n input sequences times the spreading code.Type: ApplicationFiled: May 6, 2004Publication date: February 1, 2007Inventors: Hassan El Nahas El Homsi, Moussa Abdi, Alexandre Jard