06-09-2017, 11:42 AM
The direct approach of the CSD will introduce serious quantification errors as the distribution of CDS numbers is very uneven. The proposed MDECOR transformation provides a systematic solution to effectively reduce dynamic range. By combining the proposed MDECOR transformation followed by the quantification of the CSD, we can avoid the quantification problem mentioned above. As a result, we do not need to use non-zero additional bits to compensate for the distortion caused by the direct quantification of CSD, which helps to save the number of summers in VLSI implementations. In addition, the MDECOR transformation offers more freedom in filter design. You can achieve high-precision performance under the same hardware complexity as the CSD direct approach. Our simulation results show that we can save 20% of the number of adders compared to CSD's direct approach.