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31.发明授权公开(公告)号：US10826745B2
公开(公告)日：2020-11-03
申请号：US15952062
申请日：2018-04-12
发明人： Usa Vilaipornsawai , Javad Abdoli , Jianglei Ma , Ming Jia
摘要： Embodiments are provided for guard band utilization for synchronous and asynchronous communications in wireless networks. A user equipment (UE) or a network component transmits symbols on data bands assigned for primary communications. The data bands are separated by a guard band having smaller bandwidth than the data bands. The UE or network component further modulates symbols for secondary communications with a spectrally contained wave form, which has a smaller bandwidth than the guard band. The spectrally contained wave form is achieved with orthogonal frequency-division multiplexing (OFDM) modulation or with joint OFDM and Offset Quadrature Amplitude Modulation (OQAM) modulation. The modulated symbols for the secondary communications are transmitted within the guard band.
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公开(公告)号：US10701685B2
公开(公告)日：2020-06-30
申请号：US14836538
申请日：2015-08-26
发明人： Javad Abdoli , Ming Jia , Jianglei Ma
摘要： Cyclic prefix based OFDM (CP-OFDM) signals can be filtered using a digital filter whose filter length exceeds the length of a cyclic prefix in CP-OFDM symbols of the signal. In one example, the duration of the filtered CP-OFDM symbol may be expressed by the following equation: M=N+L−1, where M is the duration of the filtered CP-OFDM signal, N is a duration of the CP-OFDM signal, and L is the filter length of the digital filter. Digitally filtering the CP-OFDM signal may include convolving a filtering signal with the CP-OFDM signal. The digital filter may include a finite impulse response (FIR) filter or an infinite impulse response (IIR) filter. In some embodiments, a different digital filter may be applied to each sub-band of the CP-OFDM signal.
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公开(公告)号：US10581659B2
公开(公告)日：2020-03-03
申请号：US16124615
申请日：2018-09-07
发明人： Mikhail Germanovich Bakulin , Gennady Vladimirovich Ovechkin , Vitaly Borisovich Kreyndelin , Javad Abdoli
IPC分类号： H04L27/26 , H04B7/0456 , H04B1/69 , H04J13/00 , H04L25/03
摘要： A method for transmitting data includes modulating data bits with a constellation to produce modulated data symbols, precoding the modulated data symbols to obtain ns groups of precoded samples, where ns is equal to a number of non-zero terms in a sparse code associated with the transmitting device, mapping the ns groups of precoded samples to groups of subcarriers in accordance with the sparse code associated with the transmitting device, to obtain a plurality of subcarrier-mapped samples, transforming the plurality of subcarrier-mapped samples into encoded data symbols, and transmitting the encoded data symbols.
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34.发明授权公开(公告)号：US10454746B2
公开(公告)日：2019-10-22
申请号：US14793286
申请日：2015-07-07
发明人： Javad Abdoli , Ming Jia , Jianglei Ma
摘要： A method for performing orthogonal frequency division multiplexing (OFDM)-offset quantization amplitude modulation (OQAM) includes obtaining a data burst. The method includes performing weighted circularly convolved filtering modulation on the data burst to produce an output signal. The method further includes a first wireless device transmitting the output signal to a second wireless device. The second wireless device receives an input signal from the first wireless device, and the second wireless devices performs weighted circularly convolved demodulation filtering on the input signal to produce the data burst.
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35.发明授权公开(公告)号：US10419257B2
公开(公告)日：2019-09-17
申请号：US16199883
申请日：2018-11-26
发明人： Javad Abdoli , Zhenfei Tang
摘要： The middle subcarrier of the baseband OFDM signal of each numerology may need to be shifted appropriately with respect to other numerologies to comply with a nested grid. These shifts can be signalled to the UE with an associated overhead. Methods and systems are provided to reduce overhead for OFDM communication. Reduced overhead can translate into increased bandwidth for the system, and/or reduced power/battery consumption in the UE. A transmitter generates an OFDM signal associated with a first subcarrier spacing of a first numerology (μ), a middle subcarrier frequency of a set of usable resource blocks (RBs) of the first numerology being offset from a carrier frequency by a first offset having a value (k0,xμ) in units of subcarriers, the value of the first offset being defined by a specific formula. The transmitter transmits the OFDM signal according to the first subcarrier spacing and the first offset.
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公开(公告)号：US20180212809A1
公开(公告)日：2018-07-26
申请号：US15415442
申请日：2017-01-25
发明人： Mikhail Germanovich Bakulin , Gennady Vladimirovich Ovechkin , Vitaly Borisovich Kreyndelin , Javad Abdoli
CPC分类号： H04L27/2615 , H04B7/0465 , H04L25/03936
摘要： A method for transmitting data includes modulating data bits with a constellation to produce modulated data symbols, precoding the modulated data symbols to obtain ns groups of precoded samples, where ns is equal to a number of non-zero terms in a sparse code associated with the transmitting device, mapping the ns groups of precoded samples to groups of subcarriers in accordance with the sparse code associated with the transmitting device, to obtain a plurality of subcarrier-mapped samples, transforming the plurality of subcarrier-mapped samples into encoded data symbols, and transmitting the encoded data symbols.
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37.发明授权公开(公告)号：US09787515B2
公开(公告)日：2017-10-10
申请号：US15161023
申请日：2016-05-20
发明人： Usa Vilaipornsawai , Javad Abdoli , Jianglei Ma , Ming Jia
CPC分类号： H04L27/2627 , H04L5/0007 , H04L27/2607 , H04L27/34 , H04L27/345
摘要： Embodiments are provided for guard band utilization for synchronous and asynchronous communications in wireless networks. A user equipment (UE) or a network component transmits symbols on data bands assigned for primary communications. The data bands are separated by a guard band having smaller bandwidth than the data bands. The UE or network component further modulates symbols for secondary communications with a spectrally contained wave form, which has a smaller bandwidth than the guard band. The spectrally contained wave form is achieved with orthogonal frequency-division multiplexing (OFDM) modulation or with joint OFDM and Offset Quadrature Amplitude Modulation (OQAM) modulation. The modulated symbols for the secondary communications are transmitted within the guard band.
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公开(公告)号：US20160192353A1
公开(公告)日：2016-06-30
申请号：US14836538
申请日：2015-08-26
发明人： Javad Abdoli , Ming Jia , Jianglei Ma
CPC分类号： H04W72/0446 , H04L5/0007 , H04L5/0066 , H04L27/2636 , H04L27/264 , H04L27/2647 , H04L27/265
摘要： Cyclic prefix based OFDM (CP-OFDM) signals can be filtered using a digital filter whose filter length exceeds the length of a cyclic prefix in CP-OFDM symbols of the signal. In one example, the duration of the filtered CP-OFDM symbol may be expressed by the following equation: M=N+L−1, where M is the duration of the filtered CP-OFDM signal, N is a duration of the CP-OFDM signal, and L is the filter length of the digital filter. Digitally filtering the CP-OFDM signal may include convolving a filtering signal with the CP-OFDM signal. The digital filter may include a finite impulse response (FIR) filter or an infinite impulse response (IIR) filter. In some embodiments, a different digital filter may be applied to each sub-band of the CP-OFDM signal.
摘要翻译： 可以使用滤波器长度超过信号的CP-OFDM符号中的循环前缀的长度的数字滤波器来对基于循环前缀的OFDM（CP-OFDM）信号进行滤波。 在一个示例中，滤波的CP-OFDM符号的持续时间可以由以下等式表示：M = N + L-1，其中M是经滤波的CP-OFDM信号的持续时间，N是CP- OFDM信号，L是数字滤波器的滤波器长度。 对CP-OFDM信号的数字滤波可以包括用CP-OFDM信号卷积滤波信号。 数字滤波器可以包括有限脉冲响应（FIR）滤波器或无限脉冲响应（IIR）滤波器。 在一些实施例中，可以将不同的数字滤波器应用于CP-OFDM信号的每个子带。
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公开(公告)号：US20210314738A1
公开(公告)日：2021-10-07
申请号：US17349184
申请日：2021-06-16
发明人： Javad Abdoli , Keyvan Zarifi , Zhenfei Tang
摘要： A method for a multicast service is provided. In this example, the method includes receiving, by a user equipment (UE), a control format including a resource allocation field from a base station (BS), the resource allocation field indicating a starting resource block (RB) index and an RB range, obtaining a set of RBs allocated for a multicast physical downlink shared channel (PDSCH) or physical uplink shared channel (PUSCH) based on a starting RB location and the RB range; wherein the starting RB location is associated with the starting RB index and at least one of a reference RB location or an assigned sub-band; and transmitting or receiving, by the UE, data over at least one RB of the set of RBs allocated for the multicast PDSCH or PUSCH.
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公开(公告)号：US11089582B2
公开(公告)日：2021-08-10
申请号：US16295558
申请日：2019-03-07
发明人： Javad Abdoli , Zhenfei Tang
摘要： Aspects of the present disclosure provide methods, devices and systems that limit a number of DCI payload sizes in order to limit the complexity of processing needed to perform blind decoding of the DCI payload. Various embodiments are provided that limit the number of DCI payload sizes. A base station determines the payload sizes to be used for a given time slot and once generated, transmits the DCI to one or more UEs. The UE is responsible for receiving the DCI and performing blind decoding to decode the information intended for the UE. In some embodiments, limiting the number of payload sizes may result in some DCI content that is smaller than the allotted DCI payload size being padded with zero bits to fill the allotted DCI payload size.
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