Patent
Feed forward signal cancellation
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TLDR
In this paper, a self-interference circuit that cancels a selfinterference signal includes, in part, a pair of signal paths that are substantially in phase, each of which paths includes a passive coupler, a delay element and a variable attenuator.Abstract:
A circuit that cancels a self-interference signal includes, in part, a pair of signal paths that are substantially in phase, each of which paths includes a passive coupler, a delay element and a variable attenuator. The circuit further includes, in part, a first group of P signal paths each of which is substantially in phase with the pair of paths, and a second group of M signal paths each of which is substantially out-of-phase relative to the pair of signal paths. Each of the P and M signal paths includes a delay element and a variable attenuator. Furthermore, (P−1) signal paths of the first group of P signal paths, and (M−1) signal paths of the second group of M signal paths include a passive coupler. Optionally, each of the M signal paths is optionally 180° out-of-phase relative to the pair of signal paths.read more
Citations
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Patent
Full duplex wireless transmission with self-interference cancellation
TL;DR: In this article, the authors proposed a two-way (full-duplex) wireless communications system with interference cancellation in both analog and digital domains to mitigate self-interference.
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TL;DR: In this article, the frequency response characteristic of the communication channel is used in determining the attenuation levels, via one or more preamble symbols, to remove a portion of a self-interference signal present in a signal received by the device.
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Signal cancellation using feedforward and feedback paths
TL;DR: In this paper, a self-interference cancellation circuit is defined as a pair of signal paths that are substantially in phase, each of which paths includes a passive coupler, a delay element and a variable attenuator.
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Systems and methods for cancelling interference using multiple attenuation delays
TL;DR: In this paper, a wireless communication device includes, in part, at least one antenna for receiving or transmitting a signal, and a cancelation circuit adapted to cancel or reduce the self-interference signal.
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Self-interference cancellation for mimo radios
Dinesh Bharadia,Sachin Katti +1 more
TL;DR: In this article, the frequency response characteristic of a multitude of communication channels, used in determining the values, via one or more preanible symbols that are jointly transmitted from the first transmit antenna and the second transmit antenna.
References
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Patent
Single channel full duplex wireless communications
TL;DR: In this paper, the first analog radio frequency signal including a signal of interest and an interference signal caused by a second analog signal transmitted in full duplex over a channel from which the first analogue transmission is received is provided.
Patent
Self-interference cancellation
TL;DR: In this article, the frequency response characteristic of the communication channel is used in determining the attenuation levels, via one or more preamble symbols, to remove a portion of a self-interference signal present in a signal received by the device.
Patent
Method and apparatus for handling full-duplex interference
TL;DR: In this paper, the authors present a method and an apparatus for handling full-duplex interference, which includes obtaining an interference degree that is caused when a site device performs fullduplex transmission with at least two UEs; and determining, according to the interference degree, a UE allowed to transmit uplink and downlink signals on the same time and frequency resource among the at least 2 UEs.
Patent
Systems and methods for cancelling interference using multiple attenuation delays
TL;DR: In this paper, a wireless communication device includes, in part, at least one antenna for receiving or transmitting a signal, and a cancelation circuit adapted to cancel or reduce the self-interference signal.
Patent
Systems and methods for full-duplex signal shaping
TL;DR: In this article, the authors present a system that includes a transmitting antenna for transmitting a signal over a plurality of wireless spectrum fragments, a receiving antenna for receiving a signal from the plurality of WSNs, and a signal processing layer in communication with the transmitting and receiving antennas for simultaneously causing reception of the received signal and transmission of the transmitted signal.