SIC

Technical Explanation

In-Band Full Duplex requires attenuating a device's own transmit power by over 110 dB so that weak incoming signals from distant towers can be decoded. Multi-stage SIC executes this in three phases: 1) Passive antenna isolation (cross-polarization, physical separation), 2) Analog RF cancellation (multi-tap delay lines subtracting the TX replica before low-noise amplification), and 3) Digital non-linear cancellation (deep learning models modeling amplifier distortion and subtracting residual leakage).

Key Functions

• Attenuating self-interference by >110 dB down to the receiver thermal noise floor
• Multi-tap analog delay lines subtracting RF transmit leakage before the receiver ADC
• Deep learning digital cancellation modeling power amplifier non-linearities
• Dynamic adaptation to changing near-field reflection environments in real time
• Enabling simultaneous transmission and high-sensitivity radar echo reception in ISAC