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公开(公告)号：US20170238255A1
公开(公告)日：2017-08-17
申请号：US15041316
申请日：2016-02-11
CPC分类号： H04W52/0229 , H04L1/0042 , H04L1/0045 , H04L1/0053 , H04L1/0054 , H04L1/20 , H04L5/0007 , Y02D70/142
摘要： Apparatuses, methods, apparatuses, and systems for of selectively deactivating portions of a receiver based on dynamic measurements are disclosed. One embodiment of a method includes receiving, by the receiver, a wireless signal, identifying a packet within the wireless signal, determining whether the packet cannot be decoded with a reliability greater than a threshold, and powering down at least a portion of the receiver after determining that the packet cannot be decoded with the reliability greater than the threshold.
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公开(公告)号：US09735990B2
公开(公告)日：2017-08-15
申请号：US15116133
申请日：2014-10-10
发明人： Kenya Sugihara
CPC分类号： H04L25/067 , H03M13/1108 , H03M13/1111 , H03M13/45 , H04L1/0054 , H04L27/38
摘要： There are provided a hard decision value calculator that calculates hard decision values from I-ch and Q-ch coordinates of a received symbol having been subjected to multilevel modulation, and an LLR calculator that approximately calculates LLRs from the I-ch and Q-ch coordinates of the received symbol. In a case where a sign bit of an LLR calculated by the LLR calculator conflicts with a hard decision value calculated by the hard decision value calculator, an LLR corrector inverts the sign bit of the LLR and outputs the sign-bit-inverted LLR as a soft decision value to an error correction decoder.
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公开(公告)号：US20170222756A1
公开(公告)日：2017-08-03
申请号：US15329714
申请日：2014-07-30
发明人： SaiRamesh NAMMI , Cagatay KONUSKAN , Namir LIDIAN
IPC分类号： H04L1/00
CPC分类号： H04L1/0054 , H04L1/0072
摘要： Method and receiver jointly detect and decode a part of an encoded, spread and modulated signal received on a channel in a wireless communication network and corrupted by channel multipath. Differences between the received signal and noiseless theoretical signals corresponding to each of the possible values of the part are calculated using hypothetical transmission matrices. The smallest difference corresponds to the actual value of the part.
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34.发明授权公开(公告)号：US09722679B2
公开(公告)日：2017-08-01
申请号：US14609253
申请日：2015-01-29
发明人： Byonghyo Shim , Sunho Park , Taeyoung Kim , Jiyun Seol
IPC分类号： H04L25/02 , H04B7/0413 , H04L1/00 , H04B7/08 , H04L1/20
CPC分类号： H04B7/0413 , H04B7/0851 , H04L1/005 , H04L1/0054 , H04L1/20 , H04L25/0202 , H04L25/023
摘要： A method of receiving a signal by a receiver in a mobile communication system is provided. The method includes: receiving a reference signal from a transmitter; determining first channel information based on the received reference signal; receiving a data signal based on the first channel information; and determining second channel information based on the received data signal and the first channel information. Iterative channel estimation is performed to reduce channel estimation errors by determining errors of signals received from a turbo decoding unit and using symbol information as pilots even in subcarriers where the pilot signals are not transmitted, and to increase the accuracy of LLR calculation through an iteration process such as a detection and decoding process in comparison with the conventional technology, thereby increasing the reception performance of the turbo decoding unit and improving communication efficiency.
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公开(公告)号：US09716601B2
公开(公告)日：2017-07-25
申请号：US14987392
申请日：2016-01-04
发明人： Mojtaba Rahmati , Dongwoon Bai , Jungwon Lee
CPC分类号： H04L25/0256 , H04B7/0413 , H04L1/0048 , H04L1/0054 , H04L27/38
摘要： Methods and apparatus for soft MIMO detection of high order QAM with initial candidate reduction are described. A method includes receiving a plurality of signals including Q-order QAM symbols; determining a reduced candidate set including C potential candidates, where C is less than Q; calculating Euclidean distances (EDs) based on the reduced candidate set; and generating LLR information based on the calculated EDs.
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36.发明申请公开(公告)号：US20170180173A1
公开(公告)日：2017-06-22
申请号：US15327600
申请日：2015-08-20
发明人： Miguel Lopez , Mårten Sundberg , Olof Liberg
IPC分类号： H04L27/20 , H04L1/00 , H04B1/707 , H04L27/233 , H04L25/03
CPC分类号： H04L27/201 , H04B1/707 , H04L1/0054 , H04L25/03834 , H04L27/2014 , H04L27/2017 , H04L27/233
摘要： A radio network node comprised, and a wireless device configured to be operative, in a wireless communication system. The radio network node obtains downlink data and converts it to a baseband signal. The conversion comprises Gaussian Minimum Shift Keying (GMSK) modulation of the downlink data. The modulation applies a negative modulation index selected based on a type of wireless device that is a target for the downlink data. A radio signal is provided based on the baseband signal and sent to, and received by, the wireless device that provides user data based on the radio signal.
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公开(公告)号：US20170180078A1
公开(公告)日：2017-06-22
申请号：US15116126
申请日：2015-01-29
发明人： Kenji MIYAMOTO , Shigeru KUWANO , Jun TERADA , Takayoshi TASHIRO
CPC分类号： H04L1/0054 , H04B7/022 , H04B7/082 , H04L25/024 , H04L25/03292 , H04W88/085
摘要： A base station apparatus includes at least one remote unit apparatus including at least one antenna; and a central unit apparatus connected to each remote unit via a transmission path. The remote antenna receives a wireless transmission signal from at least one wireless terminal including at least one antenna. The remote unit includes a channel estimation unit functioning between the terminal antenna and the remote antenna, using a reception signal received by the remote unit antenna; a reception signal processing unit that detects a reception signal corresponding to the transmission signal, using the channel information estimated by the channel estimation unit; a decoding unit that decodes each signal detected by the reception signal processing unit; and an inter-unit transmission unit that transmits each signal decoded by the decoding unit to the central unit. The central unit is provided with an inter-unit receiving unit and a signal selection unit.
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公开(公告)号：US20170163380A1
公开(公告)日：2017-06-08
申请号：US14961228
申请日：2015-12-07
发明人： Yehuda AZENKOT , Bart ZEYDEL
IPC分类号： H04L1/00
CPC分类号： H04L1/0054 , H03M13/4107 , H03M13/6502
摘要： System and method of comparing-selecting state metric values for high speed. Viterbi decoding. In an Add-Compare-Select (ACS) unit, a select-control signal is produced by Boolean operations on comparator decision signals and used to control a multiplexer structure. The comparator decision signals can be generated in parallel by an array of comparators comparing all possible pairs of a set of state metrics values. The Boolean operations are predefined through Boolean algebra that uses the decision signals as variables and complies with restriction imposed by the selection criteria, e.g., to select an minimum or maximum value of the set of state metrics values. The Boolean operations are performed by a logic module implemented using basic logic gates, such as AND, OR and NOT. As a result, the multiplexer structure that receives the set of input values can output the optimum value responsive to the select control signal.
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公开(公告)号：US20170163319A1
公开(公告)日：2017-06-08
申请号：US14960170
申请日：2015-12-04
CPC分类号： H04B7/0456 , H04B1/71057 , H04B7/0413 , H04L1/0054 , H04L5/0007
摘要： A method and a communication receiver have been described for calculating log-likelihood ratios in a communication receiver. The log-likelihood ratio is calculated for each bit of one or more subsymbols of each of the one or more spatial streams by computing effective noise on one or more spatial streams after considering noise terms resulting from MIMO detection estimates of the subsymbols on each spatial stream. Finally, signal to noise ratio is determined for one or more spatial streams from the effective noise and scaling bit log-likelihood ratios with the signal to noise ratio.
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公开(公告)号：US20170134193A1
公开(公告)日：2017-05-11
申请号：US15116133
申请日：2014-10-10
发明人： Kenya SUGIHARA
CPC分类号： H04L25/067 , H03M13/1108 , H03M13/1111 , H03M13/45 , H04L1/0054 , H04L27/38
摘要： There are provided a hard decision value calculator that calculates hard decision values from I-ch and Q-ch coordinates of a received symbol having been subjected to multilevel modulation, and an LLR calculator that approximately calculates LLRs from the I-ch and Q-ch coordinates of the received symbol. In a case where a sign bit of an LLR calculated by the LLR calculator conflicts with a hard decision value calculated by the hard decision value calculator, an LLR corrector inverts the sign bit of the LLR and outputs the sign-bit-inverted LLR as a soft decision value to an error correction decoder.
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