Patents by Inventor Edward Ken Kiu Mah
Edward Ken Kiu Mah 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: 9131515Abstract: A wireless receiver receives reference signals over a wireless link. The wireless receiver calculates a selection indication based on the received reference signals, and the wireless receiver selects from among plural channel estimation techniques based on the selection indication, where the selected channel estimation technique is usable to perform channel estimation of the wireless link.Type: GrantFiled: July 15, 2010Date of Patent: September 8, 2015Assignee: BlackBerry LimitedInventors: Jiandong Zhuang, Xixian Chen, Edward Ken Kiu Mah
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Publication number: 20150139285Abstract: A method, apparatus, and system for compression of complex data signals within a telecommunications base station. The system may include a transmitter configured to determine a larger value of either real or imaginary components of a digital complex signal. The transmitter designates an exponent of an exponential representation of the larger value as a common exponent to be used for compressing the digital complex signal. The transmitter also compresses a digital complex signal into a series of bits by sharing the common exponent across the real and imaginary components of the digital complex signal, and transmits the series of bits onto a physical medium of the communication system. The system may also include a receiver configured to receive the series of bits from the physical medium, and to expand the series of bits to reconstitute the digital complex signal by again sharing the common exponent across the real and imaginary components of the digital complex signal.Type: ApplicationFiled: January 30, 2015Publication date: May 21, 2015Inventors: Neil McGowan, Bradley John Morris, Edward Ken Kiu Mah
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Patent number: 8972359Abstract: A method and apparatus for compression of complex data signals within a telecommunications base station. The method includes representing a sample of a complex value discrete time signal using 2(L?N)?S mantissa bits and 2N+S exponent bits to realize peak output signal to noise ratios over a wider dynamic range compared to a conventional L-bit uniform quantization format. The increases in dynamic range and peak output SNR is achieved without increasing the average number of data bits per sample and with relatively simple computational effort.Type: GrantFiled: December 19, 2005Date of Patent: March 3, 2015Assignee: Rockstar Consortium US LPInventors: Neil McGowan, Bradley John Morris, Edward Ken Kiu Mah
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Publication number: 20130010907Abstract: A wireless receiver receives reference signals over a wireless link The wireless receiver calculates a selection indication based on the received reference signals, and the wireless receiver selects from among plural channel estimation techniques based on the selection indication, where the selected channel estimation technique is usable to perform channel estimation of the wireless link.Type: ApplicationFiled: September 15, 2012Publication date: January 10, 2013Applicant: Research In Motion LimitedInventors: Jiandong Zhuang, Xixian Chen, Edward Ken Kiu Mah
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Patent number: 8219076Abstract: An access probe existing and generated within a base station to simulate a mobile terminal for the purpose of testing base station receive functionality within a communications system. The access probe data is injected at baseband rather than at RF to eliminate the need for analog/RF circuitry. The access probe performs injection at the front end of the base station receiver to exercise as much receive data path as possible. A unique ID is embedded in the access probes so that the communications system is aware which probes within a sequence were received successfully and at what power level. Within in-field applications, the unique ID allows the communications system to distinguish simulated access probes from those corresponding to real mobiles.Type: GrantFiled: July 19, 2005Date of Patent: July 10, 2012Assignee: Nortel Networks LimitedInventors: Ganesh Sundararajan, Edward Ken Kiu Mah, Neil McGowan
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Publication number: 20120115470Abstract: A wireless receiver receives reference signals over a wireless link. The wireless receiver calculates a selection indication based on the received reference signals, and the wireless receiver selects from among plural channel estimation techniques based on the selection indication, where the selected channel estimation technique is usable to perform channel estimation of the wireless link.Type: ApplicationFiled: July 15, 2010Publication date: May 10, 2012Applicant: NORTEL NETWORKS LIMITEDInventors: Jiandong Zhuang, Xixian Chen, Edward Ken Kiu Mah
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Patent number: 8155089Abstract: Methods and apparatus for performing finger de-spreading and MRC combining are provided. A large antenna buffer is used to buffer all the finger signals of the same user so that the receiver can do both de-spreading and MRC at the same time without buffering the de-spreading finger symbols. For each user, a reference time is introduced to align all the finger signals of the same user in the Antenna Buffer. The reference time delay is used to generate the PN codes for de-spreading, as well as to count the number of symbols in a PCG or a frame. Methods for antenna buffer arrangement, interpolating filter implementation, channel estimation and MRC for traffic data channels, timing for the user's finger signal de-spreading and MRC, long code and short code generation for de-spreading, new finger allocation and finger timing adjustment.Type: GrantFiled: August 13, 2010Date of Patent: April 10, 2012Assignee: Ericsson ABInventors: Xixian Chen, Woon Thong, Ganesh Sundararajan, Edward Ken Kiu Mah, Karl Mann
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Patent number: 7801085Abstract: Methods and apparatus for performing finger de-spreading and MRC combining are provided. A large antenna buffer is used to buffer all the finger signals of the same user so that the receiver can do both de-spreading and MRC at the same time without buffering the de-spreading finger symbols. For each user, a reference time is introduced to align all the finger signals of the same user in the Antenna Buffer. The reference time delay is used to generate the PN codes for de-spreading, as well as to count the number of symbols in a PCG or a frame. Methods for antenna buffer arrangement, interpolating filter implementation, channel estimation and MRC for traffic data channels, timing for the user's finger signal de-spreading and MRC, long code and short code generation for de-spreading, new finger allocation and finger timing adjustment.Type: GrantFiled: June 3, 2003Date of Patent: September 21, 2010Assignee: Ericsson ABInventors: Xixian Chen, Woon Thong, Ganesh Sundararajan, Edward Ken Kiu Mah, Karl Mann
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Publication number: 20090041109Abstract: A method and apparatus for compression of complex data signals within a telecommunications base station. The method includes representing a sample of a complex value discrete time signal using 2(L?N)?S mantissa bits and 2N+S exponent bits to realize peak output signal to noise ratios over a wider dynamic range compared to a conventional L-bit uniform quantization format. The increases in dynamic range and peak output SNR is achieved without increasing the average number of data bits per sample and with relatively simple computational effort.Type: ApplicationFiled: December 19, 2005Publication date: February 12, 2009Applicant: Nortel Networks LimitedInventors: Neil McGowan, Bradley John Morris, Edward Ken Kiu Mah
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Publication number: 20080096543Abstract: An access probe existing and generated within a base station to simulate a mobile terminal for the purpose of testing base station receive functionality within a communications system. The access probe data is injected at baseband rather than at RF to eliminate the need for analog/RF circuitry. The access probe performs injection at the front end of the base station receiver to exercise as much receive data path as possible. A unique ID is embedded in the access probes so that the communications system is aware which probes within a sequence were received successfully and at what power level. Within in-field applications, the unique ID allows the communications system to distinguish simulated access probes from those corresponding to real mobiles.Type: ApplicationFiled: July 19, 2005Publication date: April 24, 2008Applicant: NORTEL NETWORKS LIMITEDInventors: Ganesh Sundararajan, Edward Ken Kiu Mah, Neil McGowan