Widely-Tunable RF Receiver Employing Synthetic Diversity for Interference Mitigation
- Resource Type
- Conference
- Authors
- Sadeghi, Sanaz; Soni, Sweta; Molnar, Alyosha
- Source
- 2022 IEEE International Symposium on Circuits and Systems (ISCAS) Circuits and Systems (ISCAS), 2022 IEEE International Symposium on. :1858-1862 May, 2022
- Subject
- Components, Circuits, Devices and Systems
Power, Energy and Industry Applications
Robotics and Control Systems
Signal Processing and Analysis
Radio frequency
Semiconductor device modeling
Phase noise
Interference suppression
Local oscillators
Prototypes
Receivers
Out-of-band interferer
phase noise
interferer suppression
front-end
- Language
- ISSN
- 2158-1525
This paper presents a novel technique for suppression of in-band artifacts from out-of-band (OOB) interference in widely tunable RF receivers. The technique employs a multi-tap inductor-capacitor network (LCN) to generate diversity in gain and phase between taps across the targeted frequency range. Using this network to feed a bank of identical receivers sharing a single local oscillator (LO) allows multiple kinds of interferer artifact to be suppressed. Here we considered spur-induced and phase noise-induced artifacts. In each case, the resulting artifacts are linearly separable from signal when the outputs of the sub-receivers are recombined. AC and transient simulations were first performed to show feasibility of the proposed approach. A prototype was implemented in 45nm CMOS which confirmed the validity of the synthetic diversity (SD) approach for suppressing interferer artifacts, showing a maximum lowering in EVM and BER of 38% and 60% respectively.