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Patent Agency Ranking
公开(公告)号：GB2472906A
公开(公告)日：2011-02-23
申请号：GB201013549
申请日：2010-08-12
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： CHANG KYUNG HI , MOHAISEN MANAR , AN HONG SUN , BAEK YOUNG SEOK , KOO BON TAE
Abstract: In a multiple-input multiple-output (MIMO) receiver employing channel estimation 10 and the `adaptive QR-decomposition with M' (AQRDM) algorithm 20, complexity is reduced when the number of transmitting antennas is large by grouping constellation sets 40 and dividing the tree search into partial detection phases (PDPs) 50, thus cutting the number of remaining branches at each detection point. Each of the G subsets Ai of constellation set E2 have the same cardinality (number of set elements) and can be grouped continuously (see fig. for 16QAM with G1=4) or dispersively (fig. 2B for 16QAM with G2=4). For each symbol, the minimum accumulated distance per PDP is calculated, and nodes for which this exceeds threshold (fig 3B) are removed in order to simplify the decision process.
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公开(公告)号：SE522873C2
公开(公告)日：2004-03-16
申请号：SE9904003
申请日：1999-11-04
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： CHANG KYUNG HI , PARK HYUNG RAE , KYEONG MUN GEON , SHIN EUNG SOON , KANG YANG GI , PARK YONG OK
Abstract: In the hardware-efficient demodulator for a CDMA adaptive antenna array mechanism of a mobile radio communication system, a correlators bank receives digital baseband signals received through an antenna array of a base station and computes correlation values with a local code sequence. A beamformer receives the digital baseband signals and the correlation values from the correlators bank and calculates beamforming weight vectors. A searchers bank receives the digital baseband signals and calculates an initial acquisition and reliable timing information for a multipath search by a common work with the beamformer, which uses a beamforming algorithm. A beamforming complex multiplier for a finger performs a complex multiplication for the beamforming weight vectors and the digital baseband signals, and sums up them. A finger bank receives output signals from the beamforming complex multiplier, executes a code tracking for an alignment between a transmission code and a phase by each multipath on the basis of the multipath search timing information to then provide the timing information of the multipath tracking to the correlators bank, and outputs signals of dispreaded multipath through a time alignment based on each path. A multipath combiner performs a multipath combination for the output signals of the finger bank on a time base and outputting it.
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公开(公告)号：SE9904003D0
公开(公告)日：1999-11-04
申请号：SE9904003
申请日：1999-11-04
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： CHANG KYUNG HI , PARK HYUNG RAE , KYEONG MUN GEON , SHIN EUNG SOON , KANG YANG GI , PARK YONG OK
Abstract: In the hardware-efficient demodulator for a CDMA adaptive antenna array mechanism of a mobile radio communication system, a correlators bank receives digital baseband signals received through an antenna array of a base station and computes correlation values with a local code sequence. A beamformer receives the digital baseband signals and the correlation values from the correlators bank and calculates beamforming weight vectors. A searchers bank receives the digital baseband signals and calculates an initial acquisition and reliable timing information for a multipath search by a common work with the beamformer, which uses a beamforming algorithm. A beamforming complex multiplier for a finger performs a complex multiplication for the beamforming weight vectors and the digital baseband signals, and sums up them. A finger bank receives output signals from the beamforming complex multiplier, executes a code tracking for an alignment between a transmission code and a phase by each multipath on the basis of the multipath search timing information to then provide the timing information of the multipath tracking to the correlators bank, and outputs signals of dispreaded multipath through a time alignment based on each path. A multipath combiner performs a multipath combination for the output signals of the finger bank on a time base and outputting it.
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公开(公告)号：GB2472906B
公开(公告)日：2012-03-14
申请号：GB201013549
申请日：2010-08-12
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： CHANG KYUNG HI , MOHAISEN MANAR , AN HONG SUN , BAEK YOUNG SEOK , KOO BON TAE
Abstract: There is provided a signal detecting method using constellation set grouping in a spatial multiplexing multiple input multiple output system. The signal detecting method includes dividing a set of candidate symbols, a constellation set into a plurality of subsets by grouping the constellation set; dividing a tree search process of a QR-decomposition with M-algorithm (QRDM) algorithm into a plurality of partial detection phases; and performing the plurality of divided partial detection phases in parallel or iteratively.
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公开(公告)号：SE9904003L
公开(公告)日：2001-01-13
申请号：SE9904003
申请日：1999-11-04
Applicant: KOREA ELECTRONICS TELECOMM
Inventor： CHANG KYUNG HI , PARK HYUNG RAE , KYEONG MUN GEON , SHIN EUNG SOON , KANG YANG GI , PARK YONG OK
Abstract: In the hardware-efficient demodulator for a CDMA adaptive antenna array mechanism of a mobile radio communication system, a correlators bank receives digital baseband signals received through an antenna array of a base station and computes correlation values with a local code sequence. A beamformer receives the digital baseband signals and the correlation values from the correlators bank and calculates beamforming weight vectors. A searchers bank receives the digital baseband signals and calculates an initial acquisition and reliable timing information for a multipath search by a common work with the beamformer, which uses a beamforming algorithm. A beamforming complex multiplier for a finger performs a complex multiplication for the beamforming weight vectors and the digital baseband signals, and sums up them. A finger bank receives output signals from the beamforming complex multiplier, executes a code tracking for an alignment between a transmission code and a phase by each multipath on the basis of the multipath search timing information to then provide the timing information of the multipath tracking to the correlators bank, and outputs signals of dispreaded multipath through a time alignment based on each path. A multipath combiner performs a multipath combination for the output signals of the finger bank on a time base and outputting it.
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