A New Architecture for Radix-2 DHT

This paper proposes a new architecture for radix-2 DHT. In the known algorithms, the stage structures perform all the additions and multiplications. The proposed algorithm introduces multiplying structures which perform all the multiplications with the cosine coefficients and their related additions. This leads to i) simplification of the stage structures which now have to perform only the additions, and ii) a reduction in the number of multiplications without affecting the total number of additions. A new architecture utilizing current feedback operational amplifiers which implements the proposed algorithm in hardware has been proposed. The architecture has been tested by simulating it with the help of Orcad PSpice.