Patents by Inventor Chang Lan
Chang Lan 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: 8675540Abstract: A resource allocation method and a resource indication method for E-MBS system, and a mobile station using the same are proposed. The resource units of a first service flow are allocated following the end of the E-MBS MAP of the E-MBS region, along with the increasing of frequency domain index. When the edge of the E-MBS region in frequency domain is reached, the resource units of mth service flow are continued to be allocated from top frequency domain index in next time domain index, where m is an integer greater than or equal to 1. The resource units of m+1th service flow are allocated following the mth service flow, and such procedures are repeated until all service flows are allocated required resource units. The resource indication method indicates a specific service flow by absolute location in the E-MBS region formed based upon the resource allocation method.Type: GrantFiled: December 1, 2010Date of Patent: March 18, 2014Assignee: Acer IncorporatedInventors: Yan-Xiu Zheng, Yu-Chuan Fang, Tsung-Lien Ho, Chun-Yuan Chiu, Chang-Lan Tsai
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Patent number: 8510621Abstract: A method of providing resource unit based data block partitioning may include determining, for a bit stream to be encoded in a coding scheme including an upper layer coding and a physical layer coding, whether upper layer coding is enabled. The method may further include, in response to the upper layer coding being enabled, partitioning the bit stream into one or more blocks for forward error correction coding. The one or more blocks may have a block size determined based on a size of a resource unit. The resource unit size may correspond to one or more units predefined in the physical layer for the resource allocation. A corresponding apparatus is also provided.Type: GrantFiled: December 22, 2010Date of Patent: August 13, 2013Assignee: Industrial Technology Research InstituteInventors: Yan-Xiu Zhang, Yu-Chuan Fang, Chang-Lan Tsai, Chung-Lien Ho
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Publication number: 20130146515Abstract: A filtration dehydration apparatus, comprises: a filter, having a filtration layer and an absorption layer while allowing a surface of the filtration layer opposite to the absorption layer to be a first side of the filter, and allowing a surface of the absorption layer opposite to the filtration layer to be a second side of the filter; a supporting structure, for supporting and fixedly secured the filter; a solid collector, for collecting any solid object left on the first side; and an extrusion unit, for pressing the absorption layer so as to squeeze liquid containing in the absorption layer out of the same; wherein the first side is provided for a solid-liquid mixture to be placed thereon for allowing the liquid containing therein to flow into the absorption layer through the filtration layer while enabling any solid object filtered out and thus left on the first side.Type: ApplicationFiled: April 30, 2012Publication date: June 13, 2013Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Ming-Der BAI, Kuo-Ti Chen, Te-Chang Lan, Yun-Huin Lin, Wen-Chang Lu, Hom-Ti Lee
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Publication number: 20130044799Abstract: A method of reducing quantization error caused by precoding for a receiver in a wireless communication system is disclosed. The method comprising measuring channel information of a channel between the receiver and a transmitter in the wireless communication system; determining at least one precoding matrix from at least one codebook according to the channel information of the channel; determining at least one geometric coefficient according to a Geodesic interpolation algorithm and the at least one precoding matrix, for the at least one precoding matrix, respectively; and feeding back the at least one precoding matrix and the at least one geometric coefficient to the transmitter.Type: ApplicationFiled: February 15, 2012Publication date: February 21, 2013Inventors: Pang-Chang Lan, Chih-Yao Wu, Ling-San Meng, Ping-Cheng Yeh, Yu-Chih Jen
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Patent number: 8351525Abstract: An orthogonal frequency division multiplexing (OFDM) receiving apparatus, including a receiving unit, a subcarrier demodulation unit and a signal output processing unit, is provided. The receiving unit is for receiving an RF signal to generate a set of discrete signals. The subcarrier demodulation unit is coupled to the receiving unit, and used for demodulating a set of discrete signals to obtain a complex signal. The signal output processing unit is coupled to the subcarrier demodulation unit, and used for capturing and outputting real parts of the complex signal.Type: GrantFiled: October 28, 2010Date of Patent: January 8, 2013Assignee: Industrial Technology Research InstituteInventors: Huan-Chun Wang, De-Jhen Huang, Chang-Lan Tsai
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Publication number: 20120159278Abstract: A method of handling a retransmission of a hybrid automatic repeat request scheme for a receiver in a communication system is disclosed. The method comprises receiving a first payload from a transmitter in the communication system, and feeding back a resource index to the transmitter, to indicate a size for a second payload in the next reception, when the receiver is unsuccessful to decode the first payload into a plurality of information bits, wherein the transmitter encodes the plurality of information bits into the first payload by using an error correction code.Type: ApplicationFiled: June 21, 2011Publication date: June 21, 2012Inventors: Yu-Chih Jen, Ping-Cheng Yeh, Chih-Yao Wu, Pang-Chang Lan, Ling-San Meng
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Publication number: 20120039405Abstract: A method of designing a reference signal pattern for a network in a wireless communication system is disclosed. The method comprises transmitting a plurality of cell-specific reference signal (CRSs) in a subframe, the subframe comprising a plurality of resource elements that are divided in time across a plurality of subcarriers to form a plurality of orthogonal frequency division multiplexed (OFDM) symbols, each of the plurality of resource element occupying a predetermined amount of time on a respective one of the plurality of subcarriers. wherein, a first set of the plurality of CRSs is allocated to a first set of the plurality resource elements on a first symbol and a second symbol over a third subcarrier, a sixth subcarrier, a ninth subcarrier and a twelfth subcarrier.Type: ApplicationFiled: July 5, 2011Publication date: February 16, 2012Applicant: ACER INCORPORATEDInventors: Yan-Xiu Zheng, Chang-Lan Tsai, Chung-Lien Ho
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Patent number: 8082865Abstract: A stationary thread-cutting device for a sewing machine includes a guiding member and a cutter. The guiding member is mounted on a needle plate, and has a major wall defining a thread guiding route. The guiding route includes a lead-in area having an entry slot to permit entry of a leading end of a bobbin thread, a turn-around area for guiding the leading end, a corner piece disposed at the turn-around area, and a cutting station disposed adjacent to a lateral edge of the needle plate to define a lead-out path with the corner piece. The cutter is disposed under the major wall and adjacent to the cutting station, and has a cutting blade. After the bobbin thread is advanced beyond the cutting station, the bobbin thread is cut, thereby ensuring that a predetermined length of the bobbin thread is available for initial interlacing with a needle thread in a sewing operation.Type: GrantFiled: June 5, 2009Date of Patent: December 27, 2011Assignee: Zeng Hsing Industrial Co., Ltd.Inventors: Shui-Chun Tseng, Chi-Chang Lan
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Publication number: 20110261897Abstract: A method for reducing the quantization effect of precoding operations utilizing a finite codebook in MIMO systems is provided. First, at the receiver side, downlink channel state information is obtained and a set of indices of precoding matrices within a plurality of finite codebooks are selected accordingly. The selected indices of precoding matrices for each of the finite codebooks and a set of scalar coefficients are transmitted from the receiver to the transmitter. Thereafter, at the transmitter side, at least a first and a second refined precoding matrices are generated based on the selected set of indices of precoding matrices for all of the finite codebooks, and the one or more scalar coefficients and a final precoding matrix is generated at least based on the first refined precoding matrix and the second refined precoding matrix. The final precoding matrix is applied for transmission between the transmitter and the receiver.Type: ApplicationFiled: June 21, 2011Publication date: October 27, 2011Applicant: HTC CORPORATIONInventors: Yu-Chih JEN, Ping-Cheng YEH, Ling-San MENG, Pang-Chang LAN, Chih-Yao WU
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Publication number: 20110200139Abstract: A method for reducing the quantization effect of precoding operations utilizing a finite codebook in multiple-input multiple-output (MIMO) or multiple-input single-output (MISO) systems from a transmitter to a receiver is provided. First, downlink channel state information is obtained at the receiver side. A set of indices of precoding matrices or a set of precoding matrices within the finite codebook are determined according to the obtained downlink channel state information at the receiver side. The selected indices of precoding matrices and a set of scalar coefficients are transmitted from the receiver to the transmitter. Thereafter, a refined precoding matrix is generated based on the set of indices of precoding matrices and the one or more scalar coefficients at the transmitter side. The refined precoding matrix is applied for transmission between the transmitter and the receiver.Type: ApplicationFiled: February 10, 2011Publication date: August 18, 2011Inventors: Yu-Chih JEN, Ping-Cheng Yeh, Ling-San Meng, Pang-Chang Lan, Chih-Yao Wu
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Publication number: 20110195733Abstract: A method for a base station to allocate resources to a mobile station, the resources being included in one or more subbands each including a plurality of resource units, the method including: allocating a part of a first one of the subbands to the mobile station, the part including one or more resource units in the first one of the subbands; and indicating to the mobile station the allocated part of the first one of the subbands by indicating a resource allocation pattern corresponding to the allocated part of the first one of the subbands.Type: ApplicationFiled: January 26, 2011Publication date: August 11, 2011Inventors: Yan-Xiu Zheng, Chang-Lan Tsai
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Patent number: 7974358Abstract: An orthogonal frequency division multiplexing (OFDM) system provided for communication includes an OFDM transmitter and an OFDM receiver. The OFDM transmitter may be configured to transmit OFDM signals through a communication channel and may include a channel encoder configured to encode a plurality of information bits and an interleaver configured to interleave the channel-encoded information bits. The OFDM transmitter may also include a mapper configured to map the interleaved channel-encoded information bits into mapped multi-level symbols. The OFDM transmitter may also include a dispersive encoder that is configured to dispersively encode the mapped symbols. The OFDM receiver may be configured to receive the transmitted OFDM signals and to decode the received OFDM signals iteratively based on soft decision methods.Type: GrantFiled: October 26, 2006Date of Patent: July 5, 2011Assignee: Industrial Technology Research InstituteInventors: Chang-Lan Tsai, Chang-Lung Hsiao, Ren-Jr Chen, Char-Dir Chung
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Publication number: 20110159882Abstract: A pilot selection method adapted for selecting rank-2 pilot patterns for a macrocell advanced base station (ABS), a femtocell ABS and a non-macrocell and non-femtocell ABS is proposed along with a wireless communication system and a base station thereof. Different rank-2 pilot pattern is selected for a femtocell ABS from its overlay macrocell ABS and non-macrocell and non-femtocell ABS rank-2 pilot patterns. Another pilot selection method for selecting a rank-1 pilot pattern for a femtocell ABS co-located with at least a macrocell ABS is also proposed. Different rank-1 pilot pattern is selected for a femtocell ABS from its overlay macrocell ABSs using rank-1 and/or rank-2 pilot patterns, where some of the macrocell ABSs can use rank-2 pilot patterns and the rest of the macrocell ABSs just use rank-1 pilot patterns. Also, different rank-1 pilot pattern is selected for the femtocell ABS from its neighboring femtocell ABSs using rank-1 pilot patterns.Type: ApplicationFiled: October 18, 2010Publication date: June 30, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chung-Lien Ho, Chang-Lan Tsai, Yan-Xiu Zheng, Yu-Chuan Fang
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Publication number: 20110161771Abstract: A method of providing resource unit based data block partitioning may include determining, for a bit stream to be encoded in a coding scheme including an upper layer coding and a physical layer coding, whether upper layer coding is enabled. The method may further include, in response to the upper layer coding being enabled, partitioning the bit stream into one or more blocks for forward error correction coding. The one or more blocks may have a block size determined based on a size of a resource unit. The resource unit size may correspond to one or more units predefined in the physical layer for the resource allocation. A corresponding apparatus is also provided.Type: ApplicationFiled: December 22, 2010Publication date: June 30, 2011Inventors: Yan-Xiu Zheng, Yu-Chuan Fang, Chang-Lan Tsai, Chung-Lien Ho
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Publication number: 20110158148Abstract: A resource allocation method and a resource indication method for E-MBS system, and a mobile station using the same are proposed. The resource units of a first service flow are allocated following the end of the E-MBS MAP of the E-MBS region, along with the increasing of frequency domain index. When the edge of the E-MBS region in frequency domain is reached, the resource units of mth service flow are continued to be allocated from top frequency domain index in next time domain index, where m is an integer greater than or equal to 1. The resource units of m+1th service flow are allocated following the mth service flow, and such procedures are repeated until all service flows are allocated required resource units. The resource indication method indicates a specific service flow by absolute location in the E-MBS region formed based upon the resource allocation method.Type: ApplicationFiled: December 1, 2010Publication date: June 30, 2011Applicant: ACER INCORPORATEDInventors: Yan-Xiu Zheng, Yu-Chuan Fang, Tsung-Lien Ho, Chun-Yuan Chiu, Chang-Lan Tsai
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Publication number: 20110139731Abstract: The invention provides a filter structure. A second porous film having a plurality of second holes is disposed on a first porous film having a plurality of first holes. The second holes are smaller than the first holes. The filter structure is dried by an easy and power-saving method such as compression.Type: ApplicationFiled: March 26, 2010Publication date: June 16, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Ming-Der Bai, Te-Chang Lan, Kuo-Ti Chen, Hom-Ti Lee, Yun-Huin Lin
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Publication number: 20110038250Abstract: An orthogonal frequency division multiplexing (OFDM) receiving apparatus, including a receiving unit, a subcarrier demodulation unit and a signal output processing unit, is provided. The receiving unit is for receiving an RF signal to generate a set of discrete signals. The subcarrier demodulation unit is coupled to the receiving unit, and used for demodulating a set of discrete signals to obtain a complex signal. The signal output processing unit is coupled to the subcarrier demodulation unit, and used for capturing and outputting real parts of the complex signal.Type: ApplicationFiled: October 28, 2010Publication date: February 17, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Huan-Chun Wang, De-Jhen Huang, Chang-Lan Tsai
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Publication number: 20100315811Abstract: A curved light guiding illuminator includes primarily a curved light guide plate, a diffuser plate and a reflector. At least one edge of the curved light guide plate has plural light emitting elements, and one side of the curved light guide plate is a rough surface to change a light path. Therefore, the path of light generated by the light emitting elements at one edge of the light guide plate is changed by being reflected through the rough surface inside the light guide plate, and a wider area of irradiation is provided.Type: ApplicationFiled: June 10, 2009Publication date: December 16, 2010Inventors: Shih-Chou CHEN, Zhi-Zhong CHEN, Hung-Chang LAN, Ching-Tai HSU
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Patent number: 7852955Abstract: An orthogonal frequency division multiplexing (OFDM) transmitting apparatus including a signal processing unit, a subcarrier orthogonalization processing unit, and a transmitting unit is provided. The signal processing unit divides a received signal into several real parts and several corresponding imaginary parts. The subcarrier orthogonalization processing unit is coupled to the signal processing unit for receiving the real and the imaginary parts of the signal, and for making the real and the imaginary parts respectively carried by a plurality of different and orthogonal subcarriers. The transmitting unit is coupled to the subcarrier orthogonalization processing unit to transmit the subcarriers.Type: GrantFiled: July 20, 2007Date of Patent: December 14, 2010Assignee: Industrial Technology Research InstituteInventors: Huan-Chun Wang, De-Jhen Huang, Chang-Lan Tsai
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Publication number: 20100307400Abstract: A stationary thread-cutting device for a sewing machine includes a guiding member and a cutter. The guiding member is mounted on a needle plate, and has a major wall defining a thread guiding route. The guiding route includes a lead-in area having an entry slot to permit entry of a leading end of a bobbin thread, a turn-around area for guiding the leading end, a corner piece disposed at the turn-around area, and a cutting station disposed adjacent to a lateral edge of the needle plate to define a lead-out path with the corner piece. The cutter is disposed under the major wall and adjacent to the cutting station, and has a cutting blade. After the bobbin thread is advanced beyond the cutting station, the bobbin thread is cut, thereby ensuring that a predetermined length of the bobbin thread is available for initial interlacing with a needle thread in a sewing operation.Type: ApplicationFiled: June 5, 2009Publication date: December 9, 2010Applicant: Zeng Hsing Industrial Co., Ltd.Inventors: Shui-Chun Tseng, Chi-Chang Lan