Patents by Inventor Younglok Kim
Younglok Kim 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: 20150229349Abstract: A base station and user equipment (UE) for use in a CDMA communication system are disclosed. The base station includes a first and second antenna for transmitting first and second communication bursts. The first channelization device spreads data using a first channelization code and the second channelization device spreads the data using a second channelization code. The UE has a data detection device for receiving a signal including the first and second communication bursts.Type: ApplicationFiled: April 21, 2015Publication date: August 13, 2015Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Younglok Kim, Ariela Zeira
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Patent number: 8681744Abstract: The present invention is a receiver which includes a blind code detection device for determining the identity of a plurality of channels over which information is to be transmitted when the identity of all channels is not known by the receiver. The blind code detection device generates a candidate channel list filled with the identify of selected channels out of the plurality of channels. A multi-user detection device, responsive to the blind code detection device, processes those channels in the candidate code list.Type: GrantFiled: March 23, 2010Date of Patent: March 25, 2014Assignee: Interdigital Technology CorporationInventors: John W Haim, Hyun-Seok Oh, Younglok Kim, Ariela Zeira, Robert A. DiFazio
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Patent number: 8311492Abstract: A base station and user equipment (UE) for use in a CDMA communication system are disclosed. The base station includes a first and second antenna for transmitting first and second communication bursts. The first channelization device spreads data using a first channelization code and the second channelization device spreads the data using a second channelization code. The UE has a data detection device for receiving a signal including the first and second communication bursts.Type: GrantFiled: November 30, 2009Date of Patent: November 13, 2012Assignee: InterDigital Technology CorporationInventors: Younglok Kim, Ariela Zeira
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Patent number: 8300520Abstract: A method and apparatus for interference signal code power noise variance estimation employing a reduced number of samples is disclosed. A recursive technique may be employed wherein the noise variance is estimated from ignored coefficients of the estimated channel output and upgraded recursively.Type: GrantFiled: February 10, 2009Date of Patent: October 30, 2012Assignee: InterDigital Technology CorporationInventors: Younglok Kim, Kyle Jung-Lin Pan, Ariela Zeira
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Publication number: 20120269237Abstract: A plurality of communication signals is received. Each communication signal has an associated code. At least two of the communication signals have a different spreading factor. The associated codes have a scrambling code period. A total system response matrix has blocks. Each block has one dimension of a length M and another dimension of a length based on in part M and the spreading factor of each communication. M is based on the scrambling code period. Data of the received plurality of communication signals is received using the constructed system response matrix.Type: ApplicationFiled: July 9, 2012Publication date: October 25, 2012Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Younglok Kim, Jung-Lin Pan, Ariela Zeira, Alexander Reznik
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Patent number: 8218607Abstract: A plurality of communication signals is received. Each communication signal has an associated code. At least two of the communication signals has a different spreading factor. The associated codes have a scrambling code period. A total system response matrix has blocks. Each block has one dimension of a length M and another dimension of a length based on in part M and the spreading factor of each communication. M is based on the scrambling code period. Data of the received plurality of communication signals is received using the constructed system response matrix.Type: GrantFiled: August 28, 2009Date of Patent: July 10, 2012Assignee: InterDigital Technology CorporationInventors: Younglok Kim, Jung-Lin Pan, Ariela Zeira, Alexander Reznik
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Patent number: 8189648Abstract: Data is estimated from a received vector comprising a plurality of communications. A received wireless signal is converted to a baseband signal, which is sampled to produce a received vector. Channel responses are estimated for the received communications. The noise variance is estimated. The noise variance is scaled by a scaling factor. Samples are processed using the estimated channel responses and the scaled noise variance to produce a spread data vector. The spread data vector is despread to recover the data of the received wireless signal.Type: GrantFiled: August 28, 2009Date of Patent: May 29, 2012Assignee: InterDigital Technology CorporationInventors: Jung-Lin Pan, Younglok Kim, Donald M. Grieco
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Patent number: 8116220Abstract: A method for the simultaneous reception of data from multiple sources having different spreading factors. A plurality of transmission response matrices are generated and grouped together for equal spreading factors. A plurality of spreading factor group matrices are assembled. A base matrix is formed based upon the spreading factor group matrix having a lowest spreading factor. An additional spreading factor group matrix is selected for consideration. Column placement reference index for the base matrix is derived. A reference location for the base matrix is derived. A column set from the selected spreading factor group matrix is derived. The column set is inserted into the base matrix. A total transmission response matrix is assembled.Type: GrantFiled: October 27, 2008Date of Patent: February 14, 2012Assignee: InterDigital Technology CorporationInventors: Younglok Kim, Jung-Lin Pan, Ariela Zeira, Alexander Reznik
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Patent number: 8116804Abstract: A criterion for biasing a binary decision requiring an unequal protection which utilizes a measured signal to interference ratio (SIR). The SIR may be derived from a determination of channel estimation. The SIR is compared against a threshold, the threshold being selected to bias the decision toward a not acknowledge (NACK) as opposed to an acknowledge (ACK) determination. The technique is advantageous for providing biased binary decisions for high speed downlink packets (HSDP) but may be utilized for both uplink and downlink applications.Type: GrantFiled: March 7, 2011Date of Patent: February 14, 2012Assignee: InterDigital Technology CorporationInventors: Stephen G. Dick, Younglok Kim, Nader Bolourchi, Sung-Hyuk Shin
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Patent number: 8023399Abstract: A plurality of communication bursts are transmitted substantially simultaneously in a time slot of a time division duplex/code division multiple access communication system. The communication system has a maximum number of K midamble shifts. Each burst has an assigned midamble. Each midamble is a shifted version of a basic midamble code having a period of P. A combined signal is received. The combined signal includes a received version of each of the communication burst's midambles. A P by P square circulant matrix is constructed including the K midamble shifts. A channel response is determined for each of the K midamble shifts using a prime factor algorithm (PFA) discrete Fourier transform (DFT) algorithm, the received combined signal and the P by P square circulant matrix. The PFA DFT algorithm has a plurality of stages. Each stage has P inputs.Type: GrantFiled: August 20, 2007Date of Patent: September 20, 2011Assignee: InterDigital Technology CorporationInventors: Jung-Lin Pan, Younglok Kim, Ariela Zeira
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Publication number: 20110159900Abstract: A criterion for biasing a binary decision requiring an unequal protection which utilizes a measured signal to interference ratio (SIR). The SIR may be derived from a determination of channel estimation. The SIR is compared against a threshold, the threshold being selected to bias the decision toward a not acknowledge (NACK) as opposed to an acknowledge (ACK) determination. The technique is advantageous for providing biased binary decisions for high speed downlink packets (HSDP) but may be utilized for both uplink and downlink applications.Type: ApplicationFiled: March 7, 2011Publication date: June 30, 2011Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Stephen G. Dick, Younglok Kim, Nader Bolourchi, Sung-Hyuk Shin
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Patent number: 7904107Abstract: A criterion for biasing a binary decision requiring an unequal protection which utilizes a measured signal to interference ratio (SIR). The SIR may be derived from a determination of channel estimation. The SIR is compared against a threshold, the threshold being selected to bias the decision toward a not acknowledge (NACK) as opposed to an acknowledge (ACK) determination. The technique is advantageous for providing biased binary decisions for high speed downlink packets (HSDP) but may be utilized for both uplink and downlink applications.Type: GrantFiled: June 4, 2008Date of Patent: March 8, 2011Assignee: InterDigital Technology CorporationInventors: Stephen G. Dick, Younglok Kim, Nader Bolourchi, Sung-Hyuk Shin
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Publication number: 20100177743Abstract: The present invention is a receiver which includes a blind code detection device for determining the identity of a plurality of channels over which information is to be transmitted when the identity of all channels is not known by the receiver. The blind code detection device generates a candidate channel list filled with the identify of selected channels out of the plurality of channels. A multi-user detection device, responsive to the blind code detection device, processes those channels in the candidate code list.Type: ApplicationFiled: March 23, 2010Publication date: July 15, 2010Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: John W. Haim, Hyun-Seok Oh, Younglok Kim, Ariela Zeira, Robert A. DiFazio
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Publication number: 20100074242Abstract: A base station and user equipment (UE) for use in a CDMA communication system are disclosed. The base station includes a first and second antenna for transmitting first and second communication bursts. The first channelization device spreads data using a first channelization code and the second channelization device spreads the data using a second channelization code. The UE has a data detection device for receiving a signal including the first and second communication bursts.Type: ApplicationFiled: November 30, 2009Publication date: March 25, 2010Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Younglok Kim, Ariela Zeira
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Patent number: 7684371Abstract: The present invention is a receiver which includes a blind code detection device for determining the identity of a plurality of channels over which information is to be transmitted when the identity of all channels is not known by the receiver. The blind code detection device generates a candidate channel list filled with the identify of selected channels out of the plurality of channels. A multi-user detection device, responsive to the blind code detection device, processes those channels in the candidate code list.Type: GrantFiled: April 20, 2009Date of Patent: March 23, 2010Assignee: InterDigital Technology CorporationInventors: John W. Haim, Hyun-Seok Oh, Younglok Kim, Ariela Ziera, Robert A. DiFazio
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Publication number: 20100020856Abstract: A plurality of communication signals is received. Each communication signal has an associated code. At least two of the communication signals has a different spreading factor. The associated codes have a scrambling code period. A total system response matrix has blocks. Each block has one dimension of a length M and another dimension of a length based on in part M and the spreading factor of each communication. M is based on the scrambling code period. Data of the received plurality of communication signals is received using the constructed system response matrix.Type: ApplicationFiled: August 28, 2009Publication date: January 28, 2010Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Younglok Kim, Jung-Lin Pan, Ariela Zeira, Alexander Reznik
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Publication number: 20090316762Abstract: Data is estimated from a received vector comprising a plurality of communications. A received wireless signal is converted to a baseband signal, which is sampled to produce a received vector. Channel responses are estimated for the received communications. The noise variance is estimated. The noise variance is scaled by a scaling factor. Samples are processed using the estimated channel responses and the scaled noise variance to produce a spread data vector. The spread data vector is despread to recover the data of the received wireless signal.Type: ApplicationFiled: August 28, 2009Publication date: December 24, 2009Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: Jung-Lin Pan, Younglok Kim, Donald Grieco
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Patent number: 7596171Abstract: A plurality of communication signals is received. Each communication signal has an associated code. At least two of the communication signals has a different spreading factor. The associated codes have a scrambling code period. A total system response matrix has blocks. Each block has one dimension of a length M and another dimension of a length based on in part M and the spreading factor of each communication. M is based on the scrambling code period. Data of the received plurality of communication signals is received using the constructed system response matrix.Type: GrantFiled: December 21, 2007Date of Patent: September 29, 2009Assignee: InterDigital Technology CorporationInventors: Younglok Kim, Jung-Lin Pan, Ariela Zeira, Alexander Reznik
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Patent number: 7583722Abstract: Data is estimated from a received vector comprising a plurality of communications. A received wireless signal is converted to a baseband signal, which is sampled to produce a received vector. Channel responses are estimated for the received communications. The noise variance is estimated. The noise variance is scaled by a scaling factor. Samples are processed using the estimated channel responses and the scaled noise variance to produce a spread data vector. The spread data vector is despread to recover the data of the received wireless signal.Type: GrantFiled: December 21, 2007Date of Patent: September 1, 2009Assignee: InterDigital Technology CorporationInventors: Jung-Lin Pan, Younglok Kim, Donald M. Grieco
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Publication number: 20090201887Abstract: The present invention is a receiver which includes a blind code detection device for determining the identity of a plurality of channels over which information is to be transmitted when the identity of all channels is not known by the receiver. The blind code detection device generates a candidate channel list filled with the identify of selected channels out of the plurality of channels. A multi-user detection device, responsive to the blind code detection device, processes those channels in the candidate code list.Type: ApplicationFiled: April 20, 2009Publication date: August 13, 2009Applicant: INTERDIGITAL TECHNOLOGY CORPORATIONInventors: John W. Haim, Hyun-Seok Oh, Younglok Kim, Ariela Ziera, Robert A. DiFazio