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公开(公告)号：US20210399395A1
公开(公告)日：2021-12-23
申请号：US17272237
申请日：2018-08-27
发明人： Youping SU , Jichang LIAO
摘要： A radio unit for unsynchronized Time Division Duplex (TDD) multi-band operation in a wireless communication system. The radio unit comprises a first resonator arrangement comprising one or more resonators tuned for operating at a first frequency band. A first terminal of the first resonator arrangement is coupled to an antenna element. The radio unit further comprises a second resonator arrangement comprising one or more resonators tuned for operating at a second frequency band. A first terminal of the second resonator arrangement is coupled to the antenna element. The radio unit further comprises a tunable resonator arrangement comprising at least four tunable resonators. The at least four tunable resonators in the tunable resonator arrangement are tuned according to different operating modes.
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公开(公告)号：US20170187509A1
公开(公告)日：2017-06-29
申请号：US15118164
申请日：2014-02-12
发明人： Ming LI , Youping SU
CPC分类号： H04L5/14 , H04B1/0057 , H04B1/0075 , H04B1/0082 , H04B1/26 , H04W72/0453 , H04W88/02
摘要： In a method of a heterodyne FDD receiver for enabling reception of a multi-band RXRF signal spectrum, an RXRF signal spectrum is received, which comprises a lower frequency band and a higher frequency band. A Local Oscillator, LO, output frequency, fLO, is selected based on a frequency fA of the lower frequency band, and a frequency fB of the higher frequency band. Moreover, the RXRF signal spectrum is frequency shifted into an RXIF signal spectrum, by mixing the RXRF signal spectrum with the LO output frequency fLO. The LO frequency fLO is selected to satisfy fA
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公开(公告)号：US20180234194A1
公开(公告)日：2018-08-16
申请号：US15751698
申请日：2015-08-11
发明人： Ming LI , Youping SU , Björk VIMAR , Mats KLINGBERG , Gerlach SPEE
CPC分类号： H04B17/21 , H04B1/30 , H04L27/3863 , H04L27/3872
摘要： There is disclosed mechanisms for calibrating a homodyne receiver in a signal distribution network for time division duplex; a corresponding method is performed by a baseband calibration module. The method comprises acquiring a transmission signal being input to a homodyne transmitter of the signal distribution network; acquiring, from a heterodyne transmitter observation receiver of the signal distribution network, a first received version of the transmission signal; acquiring, from a homodyne receiver of the signal distribution network, a second received version of the transmission signal; and, calibrating the homodyne receiver using a comparison of the first received version of the transmission signal and the second received version of the transmission signal, using the first received version of the transmission signal as a reference signal, and using the transmission signal as a calibration signal.
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公开(公告)号：US20170126270A1
公开(公告)日：2017-05-04
申请号：US15317520
申请日：2014-06-16
发明人： Youping SU , Ming LI
摘要： Embodiments provides a radio network entity and the method thereof for improving filtering performance in a time division duplexing radio communication system, the radio network entity comprises: a first filter, which is configured to perform a first type of filtering for a signal to be transmitted to, or received from a device in the radio communication system through a radio interface, with a common filtering requirement for transmitting and receiving fulfilled, a second filter, which is configured to perform a second type of filtering for the signal to be transmitted to the device, with additional filtering requirement for transmitting besides the common filtering requirement fulfilled; and a third filter, which is configured to perform a third type of filtering for the signal received from the device, with additional filtering requirement for receiving besides the common filtering requirement fulfilled.
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公开(公告)号：US20210175858A1
公开(公告)日：2021-06-10
申请号：US17257051
申请日：2018-07-03
发明人： Youping SU , Yuanjun XU , Zhongwen LI
摘要： A method for performing transmission and reception of signals in a radio transceiver arrangement includes creating a first analogue signal to be transmitted based on a digitally predistorted digital input signal and converting a second analogue signal into a digital output signal. The second analogue signal is a combination of a received signal and a transmitter observation signal. The received signal is based on a radio signal received by the radio transceiver arrangement. The transmitter observation signal is based on a tapped signal of the first analogue signal. The digital predistortion of the digital input signal is adapted based on the part of the output digital signal that corresponds to the transmitter observation signal.
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公开(公告)号：US20210105807A1
公开(公告)日：2021-04-08
申请号：US17048295
申请日：2018-05-15
发明人： Zhongwen LI , Youping SU , Yuanjun XU
IPC分类号： H04W72/12
摘要： Disclosed is a method performed by a radio access network node of a wireless communication network for handling transmission of LTE or NR signals as well as NB-IoT signals to wireless communication devices over a carrier comprising a plurality of PRBs. The method comprises scheduling the carrier so that at least one of the PRBs is to be used for transmission of NB-IoT signals, called NB-IoT PRBs, and some of the PRBs are to be used for transmission of LTE or NR signals, called LTE PRBs. The method then comprises transmitting LTE or NR signals only in a first group of the scheduled LTE PRBs that experience an interference from the at least one NB-IoT PRB that is lower than the interference experienced from the at least one NB-IoT PRB by a second group of the LTE PRBs, or transmitting LTE or NR signals modulated with a first modulation scheme in the LTE PRBs of the first group, and transmitting LTE or NR signals modulated with a second modulation scheme more robust than the first modulation scheme in the LTE PRBs of the second group.
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公开(公告)号：US20180248578A1
公开(公告)日：2018-08-30
申请号：US15755629
申请日：2015-08-27
发明人： Ming Li , Youping SU
IPC分类号： H04B1/16
CPC分类号： H04B1/1638 , H04B1/005 , H04B1/06 , H04B1/1646 , H04B1/18
摘要： The present disclosure provides a method and a dual band receiver for handling an analog dual band radio signal comprising a first frequency band component and a second frequency band component. The method comprises sampling the analog dual band radio signal through the use of interleaving analog-to-digital converters, ADCs, to obtain four sampled signals including a first I component, Iin+, a first Q component, Qin+, a second I component, Iin−, and a second Q component, Qin−, wherein phases of Qin+, Iin− and Qin− are respectively offset with respect to phases of Iin+, Qin+ and Iin− by π/2. Then, the four sampled signals are filtered through the use of polyphase filters to obtain a first set of filtered signals (a1, a2, a3, a4) each of which has a same power as the first frequency band component and a second set of filtered signals (b1, b2, b3, b4) each of which has a same power as the second frequency band component. Subsequently, a power of the first frequency band component, a power of the second frequency band component and a total power of the first frequency band component and the second frequency band component are estimated, based on the four sampled signals, the first set of filtered signals and the second set of filtered signals. Next, the first frequency band component and the second frequency band component are selectively attenuated based on the estimated powers.
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