An approach for fixed coefficient RNS-based FIR filter

作者：Reddy Kotha Srinivasa^*; Sahoo Subhendu Kumar

来源：International Journal of Electronics, 2017, 104(8): 1358-1376.

DOI：10.1080/00207217.2017.1296593

• FIR filter
• residue number system
• shift add approach
• pre-loaded product
• modular multiplication

In this work, an efficient new modular multiplication method for {2(k)-1, 2(k), 2(k+1)-1} moduli set is proposed to implement a residue number system (RNS)-based fixed coefficient finite impulse response filter. The new multiplication approach reduces the number of partial products by using pre-loaded product block. The reduction in partial products with the proposed modular multiplication improves the clock frequency and reduces the area and power as compared with the conventional modular multiplication. Further, the present approach eliminates a binary number to residue number converter circuit, which is usually needed at the front end of RNS-based system. In this work, two fixed coefficient filter architectures with the new modular multiplication approach are proposed. The filters are implemented using Verilog hardware description language. The United Microelectronics Corporation 90nm technology library has been used for synthesis and the results area, power and delay are obtained with the help of Cadence register transfer level compiler. The power delay product (PDP) is also considered for performance comparison among the proposed filters. One of the proposed architecture is found to improve PDP gain by 60.83% as compared with the filter implemented with conventional modular multiplier. The filters functionality is validated with the help of Altera DSP Builder.

• 出版日期2017