# Improved Circuit Design of Analog Joint Source Channel Coding for Low-power and Low-complexity Wireless Sensors

## TL;DR

This paper presents an improved circuit design for Analog Joint Source Channel Coding in wireless sensors, reducing power and complexity while enabling higher resolution environmental monitoring.

## Contribution

The paper introduces an ADB-based circuit design for AJSCC that outperforms previous designs in power efficiency and circuit simplicity for many levels.

## Key findings

- Outperforms previous designs in power consumption
- Reduces circuit complexity for >= 16 levels
- Enables higher resolution environmental sensing

## Abstract

To enable low-power and low-complexity wireless monitoring, an improved circuit design of Analog Joint Source Channel Coding (AJSCC) is proposed for wireless sensor nodes. This innovative design is based on Analog Divider Blocks (ADB) with tunable spacing between AJSCC levels. The ADB controls the switching between two types of Voltage Controlled Voltage Sources (VCVS). LTSpice simulations were performed to evaluate the performance of the circuit, and the power consumption and circuit complexity of this new ADB-based design were compared with our previous parallel-VCVS design. It is found that this improved circuit design based on ADB outperforms the design based on parallel VCVS for a large number of AJSCC levels (>= 16), both in terms of power consumption as well as circuit complexity, thus enabling persistent and higher temporal/spatial resolution environmental sensing.