Proposed Title:

Invasive RLS-Based Fetal ECG Extraction with Optimized Shift-and-Add Multiplier for Area-Efficient FPGA Implementation

Improvement of this project :

• The time of ECG Testing both Fetal and Maternal Arrhythmia detection is important. At this time Non-invasive method of Fetal ECG extraction is already available it will support only standard and preferred state of pregnancy. At the time risk, the invasive method is most priority one, here we have developed invasive RLS architecture and extracted Maternal ECG.

• For architecture reduction, we can use Optimized shift and add Multiplier, to reduce number of logic size and prove the comparisons.

• To develop this work in Verilog HDL, and synthesized this work in Xilinx Vertex-5 FPGA, and compared all the parameters in terms of area, delay and power.

Software Implementation:

• Modelsim
• Xilinx Vivado

Proposed System:

This paper presents a hardware-efficient architecture for the invasive extraction of fetal electrocardiogram (FECG) signals using an optimized Recursive Least Squares (RLS) filtering technique. While noninvasive methods are commonly used during standard pregnancy conditions, they often fail to deliver accurate results during high-risk or labor scenarios. To address this, the proposed method utilizes an invasive approach that enables direct and reliable acquisition of fetal and maternal ECG signals. Here, the proposed architecture extracted maternal ECG signal at the time of invasive method, the Fetal ECG signal also filtered and taken direct FECG signals. The filtering process integrates an energy-dependent mechanism that adapts filter weights based on the energy variations of R-peak and non-R-peak components, enhancing signal separation performance. Additionally, an optimized shift-and-add multiplier is incorporated within the RLS architecture to minimize hardware complexity, area, and power consumption without degrading the accuracy of signal extraction. The entire design is implemented using Verilog HDL and synthesized on a Xilinx Virtex-5 FPGA. Comparative evaluations are performed in terms of area utilization, delay, and power, demonstrating that the proposed system outperforms conventional architectures in both efficiency and accuracy. This invasive FECG extraction approach is particularly well-suited for real-time monitoring in critical pregnancy conditions, offering a reliable and resource-optimized solution for advanced biomedical applications.

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Energy-Dependent RLS Architecture for the Separation of Fetal ECG Using Thoracic and Abdominal Lead ECG of Mother