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Patent

Non-Linear Interference Cancellation For Wireless Transceivers

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TLDR
In this article, non-linear interference cancellation techniques for wireless transceivers are provided for the reduction of interference of a transmit signal on a received signal in a transceiver device.
Abstract
Non-linear interference cancellation techniques are provided for wireless transceivers. Non-linear reduction of interference of a transmit signal on a received signal in a transceiver device, comprises applying the transmit signal to a first non-linear system; applying the received signal to a second non-linear system; and subtracting an output of the first non-linear system output from an output of second non-linear system output to produce an interference mitigated received signal. The first non-linear system and/or the second non-linear system can be to implemented using one or more of a Volterra series and a Generalized Memory Polynomial Model. System parameters of the first non-linear system and/or the second non-linear system are adapted to reduce a power of the interference mitigated received signal.

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Citations
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TL;DR: In this paper, a system for phase noise mitigated communication including a primary transmitter that converts a digital transmit signal to an analog transmit signal, a primary receiver that receives an analog receive signal and converts the analog receive signals to a digital receive signal, and a digital self-interference cancellation signal with the digital receive signals was proposed.
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TL;DR: In this article, a system for frequency-isolated self-interference cancellation includes a transmit coupler, that samples an RF transmit signal to create a sampled RF transmission signal having a first RF carrier frequency, an RF selfinterference canceler that transforms the sampled RF transmit signals to an RF Self-interaction cancellation signal, a receive coupler that combines the RF self-Interference cancellation signal with an RF receive signal to form a reduced interference receive signal, and a frequency shifter.
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TL;DR: In this paper, a self-interference cancellation signal from the RF transmit signal based on a set of configuration parameters was combined with the RF receive signal to create a composite receive signal, which was then adapted based on the compo-site receive signal.
References
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Linear amplification technique for digital mobile communications

Y. Nagata
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Patent

Amplifier measurement and modeling processes for use in generating predistortion parameters

TL;DR: In this article, a wideband predistortion system consisting of a data structure in which each element stores a set of compensation parameters (preferably including FIR filter coefficients) for predistorting the wideband input transmission signal is proposed.
Patent

Digital predistortion methods for wideband amplifiers

TL;DR: In this article, a digital compensation signal processing component (DCSP) is used to compensate for the frequency and time dependent AM-AM and AM-PM distortion characteristics of a nonlinear amplifier.
Patent

A wideband digital predistortion linearizer for nonlinear amplifiers

TL;DR: In this article, a digital compensation signal processing component (DCSP) is used to pre-dictate a wideband input transmission signal to compensate for the frequency and time dependent AM-AM and AM-PM distortion characteristics of a non-linear amplifier.