Blind source separation of baseband RF communication signals using mixed-signal matrix multiplication circuit

TL;DR

This paper presents a novel mixed-signal matrix multiplier circuit implemented in 65 nm CMOS technology, designed for blind source separation of RF signals, achieving high resolution, dynamic range, and effective signal separation.

Contribution

It introduces an 8x8 hybrid capacitor-resistor matrix multiplier circuit specifically for RF blind source separation, with high resolution and low power consumption.

Findings

Achieved > 62 dB dynamic range

Separation of single-tone signals better than 57 dBc

Operates with bandwidth > 15 MHz

Abstract

An 8 x 8 mixed-signal matrix multiplier architecture based on 64 hybrid capacitor-resistor multiplying digital to analogue converters implemented in a 65 nm CMOS technology was developed for the application of blind source separation of baseband RF signals. The integrated circuit has 13-bit resolution for each matrix weight and achieves a measured dynamic range of > 62 dB with a bandwidth of > 15 MHz and typical power dissipation of < 30 mW per matrix row. Separation of single-tone signal is measured to be better than 57 dBc.