High Speed and Energy Efficient FIR Filter Using Concatenation Incrementation Carry Skip Adder
S. Sasikala · International Journal of Emerging Trends in Engineering Research · 2020
Finite Impulse Response (FIR) filter is the most important digital filter used for noise removal.The performance of the FIR filter gets degraded due to the presence of multipliers and adders.Number of research work has been carried out to improve the speed, area and power of the FIR filters.In this project, Concatenation Incrementation Carry Skip Adder (CI-CSKA) is proposed to increase the speed and to reduce the power consumption of the adder.Using CI-CSKA, the multiplier units are designed and FIR filter is constructed further.The proposed adder is coded using verilog and implemented in Spartan FPGA.The performance of the adder, multiplier and the FIR filter is analyzed and compared with conventional carry skip adder.From the analysis, it is observed that the area of the FIR filter using 4 bit CI-CSKA adder and multiplier is reduced by 58.33% compared with conventional CSKA adder and multiplier.Also the delay of the FIR filter is reduced to 12.15% compared with the conventional CSKA.The area of FIR filter using 8 bit CI CSKA adder and multiplier is reduced by 58.11% compared with conventional 8 bit CSKA adder and multiplier.The delay of FIR filter is reduced to 3.56% compared with conventional 8 bit CSKA.