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公开(公告)号：US11050594B2
公开(公告)日：2021-06-29
申请号：US16701203
申请日：2019-12-03
发明人： James A. Norris , Christopher D. Mackey , Richard J. Buckley , Myung K. Lee , Shane B. Eisenman
摘要： A communications system may include a transmitter having spreading stages configured to spread a common modulated baseband input data stream based upon respective coefficient sequences; a plurality of upconverters, each having a different frequency; and an RF output stage that generates an RF output signal. A receiver may include an RF input stage that receives an RF input signal, a plurality of downconverters, a plurality of despreading stages, and a demodulator coupled to the despreading stages.
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2.发明授权公开(公告)号：US10432445B1
公开(公告)日：2019-10-01
申请号：US15989058
申请日：2018-05-24
IPC分类号： H04L27/26 , H04B10/2575
摘要： Systems (400) and methods for reducing a number of cyclostationary features in a transmitted signal. The methods comprise: obtaining by a transmitter a discrete-time IF signal comprising a sequence of samples all having a same sample duration; performing operations by a sub-sample dithering processing device of the transmitter to modify a sample timing of the discrete-time IF signal by decreasing or increasing a duration of at least one first sample of the sequence using a digital signal processing technique in a digital domain; converting the discrete-time IF signal to an RF signal; and transmitting the RF signal having a reduced number of cyclo stationary features.
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公开(公告)号：US11356851B2
公开(公告)日：2022-06-07
申请号：US16701212
申请日：2019-12-03
IPC分类号： H04L9/00 , H04W12/122 , H04L5/02 , H04L5/06 , H04L27/00
摘要： A radio frequency (RF) communications system may include an RF transmitter having multicarrier transmitter circuitry that transmits frequency bands over a frequency range. A controller may selectively transmit real information over at least one of the frequency bands and selectively transmits fake information within the frequency range. The controller's operation is based on embedded machine learning model and real-time effectiveness feedback from built-in spectral analyzer. An RF receiver receives the real information from the RF transmitter.
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公开(公告)号：US10250232B1
公开(公告)日：2019-04-02
申请号：US15996735
申请日：2018-06-04
IPC分类号： H03H17/00 , H04L27/26 , H04B10/2575 , H03M1/06
摘要： Systems (400) and methods for removing dither introduced into a transmitted RF signal. The method comprising: receiving, by a receiver, the transmitted RF signal; converting, by the receiver, the transmitted RF signal into a discrete-time IF signal comprising a sequence of samples, where at least a first sample of said samples has a first sample duration different than a second sample duration of at least a second sample of said samples; and performing operations by a sub-sample dither removal device of the receiver to modify a sample timing of the discrete-time IF signal by decreasing or increasing the first sample duration of the first sample using a digital signal processing technique in a digital domain.
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