An Integrated CMOS Passive Self-Interference Mitigation Technique for FDD Radios

Zhang, Tong; Suvarna, Apsara Ravish; Bhagavatula, Venumadhav; Rudell, Jacques C.

doi:10.1109/jssc.2015.2408324

Cited by 32 publications

(7 citation statements)

References 31 publications

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“…Passive cancelers enable low power and high linearity [16]. Without internal amplification, minimization of fixed losses is key, especially at low ISO TX−RX , in order to maximize the input impedance and minimize the noise injected in the RX.…”

Section: Rf Cancellermentioning

confidence: 99%

An FDD Wireless Diversity Receiver With Transmitter Leakage Cancellation in Transmit and Receive Bands

Montanari

Castellano

Kargaran

et al. 2018

IEEE J. Solid-State Circuits

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Antenna-coupling group delay limits the cancellation bandwidth of conventional self-interference cancellers (SICs), making it difficult to ensure isolation in both transmit (TX) and receive (RX) bands. Isolation over both bands is achieved in the dual-path receiver architecture proposed in this paper. The main path consists of a highly linear current-mode RX with a passive RF SIC. The auxiliary path implements a notch in the TX band followed by an adaptive digital equalizer whose output is used to suppress the TX noise leakage in the RX band. The main and auxiliary receiver prototypes, implemented in 28-nm CMOS technology, operate between 1 and 2 GHz, occupy an area of 0.51 and 0.12 mm 2 , and have a power dissipation of 32-40 and 26-64 mW, respectively. The stand-alone RX has a noise figure (NF) of 4-5 dB and an out-of-band IIP3 of 18 dBm. Turning on the passive canceller results in an effective IIP3 of 25-29 dBm and a degradation of the NF of less than 0.8 dB. Thanks to its high dynamic range, the auxiliary path suppresses the TX noise by >29 dB while degrading the RX NF by only 1 dB at 23-dBm TX output power.

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Section: Rf Cancellermentioning

confidence: 99%

An FDD Wireless Diversity Receiver With Transmitter Leakage Cancellation in Transmit and Receive Bands

Montanari

Castellano

Kargaran

et al. 2018

IEEE J. Solid-State Circuits

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“…Comparing with one of the most recent TX leakage cancellation techniques in [3] (shown in Table I), the bandwidth of the proposed cancellation is significantly larger. Though the measured P-P. performance of the proposed system is not as good as Zhang's technique, it is mainly due to the implementation of the system.…”

Section: B Measured Resultsmentioning

confidence: 97%

“…In [3], an analog cancellation architecture named as four port canceller (FPC) has been proposed for an FDD transceiver with a film bulk acoustic resonator (FBAR) duplexer. Using this technique, the amplitude and the phase of the replicated TX signal are varied by changing the values of the three capacitors in the RF cancellation block.…”

Section: Introductionmentioning

confidence: 99%

A digitally assisted analog cancellation system at RF frequencies for improving the isolation performance of a ceramic duplexer

Han

Wang

Ibrahim

et al. 2016

2016 46th European Microwave Conference (EuMC)

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In order to reduce the isolation performance requirement of a duplexer in an FDD transceiver, this paper presents a TX leakage cancellation technique that is digitally controlled, operates at RF frequencies and is designed to suppress the in-band leakage with respect to the RX band. Not only the attenuation and phase, but also the delays are optimized by using the proposed MADF-DC estimation technique. In order to demonstrate the concept, the cancellation system with a ceramic duplexer is prototyped using dedicated components for the transceiver test bench that uses a ceramic duplexer. The design bandwidth of the system is 35 MHz at the centre frequency of 897.5 MHz. More than 11 dB and 20 dB of cancellation have been achieved by measurement and simulation, respectively.

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“…Feedback translational loops create an input impedance match at the input of the LNA in the desired frequency band. Here, the RF signal is downconverted to BB, low-pass filtered, and then upconverted again [67]. The selectivity can be configured with the BW of the lowpass filter.…”

Section: B Analog Interference Mitigationmentioning

confidence: 99%

A Survey of Self-Interference in LTE-Advanced and 5G New Radio Wireless Transceivers

Sadjina

Paireder

Huemer

et al. 2020

IEEE Trans. Microwave Theory Techn.

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This article presents a comprehensive survey of the literature on self-interference (SI) in long-term evolution advanced (LTE-A) and fifth-generation (5G) new radio transceivers and should serve the reader as a guide and starting point for further work on SI management. Current trends in cellular transceiver designs are discussed, and reasons why new technologies, such as carrier aggregation, cause potential sensitivity degradation due to self-interfering signals are highlighted. The survey provides an overview of the most common interference mechanisms and continues with a taxonomy on SI mitigation architectures by comparing the strengths and weaknesses of various techniques.

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An Integrated CMOS Passive Self-Interference Mitigation Technique for FDD Radios

Cited by 32 publications

References 31 publications

An FDD Wireless Diversity Receiver With Transmitter Leakage Cancellation in Transmit and Receive Bands

An FDD Wireless Diversity Receiver With Transmitter Leakage Cancellation in Transmit and Receive Bands

A digitally assisted analog cancellation system at RF frequencies for improving the isolation performance of a ceramic duplexer

A Survey of Self-Interference in LTE-Advanced and 5G New Radio Wireless Transceivers

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