← 返回 JSSC 论文列表JSSC 2014第11期RF & Wireless0.35 µmBiosignal
An ECG-on-Chip With 535 nW/Channel Integrated Lossless Data Compressor for Wireless
提出一种低功耗ECG片上系统，集成无损数据压缩技术，适用于无线/移动ECG传感器。
0.35 µm, 2.4 V, 512 Hz, 535 nW/channel
ECG片上系统无损压缩低功耗无线传感器
▸创新点1：线性斜率预测器用于数据压缩。该方法创新性地采用线性斜率预测器对ECG信号进行无损压缩，通过预测信号趋势减少冗余数据，实现2.25×的平均压缩比，显著降低无线传输带宽需求。
▸创新点2：低复杂度动态编码打包方案。系统创新地提出一种动态编码打包技术，将预测误差高效封装为固定格式，兼顾压缩效率与硬件复杂度，仅需0.565 K gates/channel的极低逻辑资源开销。
▸创新点3：固定长度16位格式帧预测误差。电路创新设计16位固定长度数据帧结构，简化硬件实现流程，同时支持无损重构，在0.35 µm工艺下实现单通道0.4 mm²的超小面积占用。
▸创新点4：超低功耗系统集成。整体方案在2.4V电压下仅消耗535 nW/channel的功耗，结合512 Hz采样率，成为可穿戴ECG传感器的理想解决方案，体现系统级能效优化创新。
Abstract
This paper presents a low-power ECG recording system-on-chip (SoC) with on-chip low-complexity lossless ECG compression for data reduction in wireless/ambulatory ECG sensor devices. The chip uses a linear slope predictor for data compression, and incorporates a novel low-complexity dynamic coding-packaging scheme to frame the prediction error into fixed-length 16 bit format. The proposed technique achieves an average compression ratio of 2.25× on MIT/BIH ECG database. Implemented in a standard 0.35 µm process, the compressor uses 0.565 K gates/channel occupying 0.4 mm f o rf o u rc h a n n e l s ,a n d consumes 535 nW/channel at 2.4 V for ECG sampled at 512 Hz. Small size and ultra-low-power consumption makes the proposed technique suitable for wearab le ECG sensor applications.