COMPARATIVE ANALYSIS OF MODIFIED REGISTER EXCHANGE METHOD AND TRACE BACK METHOD OF VITERBI DECODER FOR WIRELESS COMMUNICATION

• Main Authors: H. Singh, R. K. Vyas, Deepak Raghuvanshi
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Back (TB; The Pointers
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.670.2230; http://www.e-ijaet.org/media/16I10-IJAET1009259-COMPARATIVE-ANALYSIS.pdf

The Objective of this paper is to describe the comparative analysis of the two different method of implementation for Viterbi decoder based on the modified Register Exchange and Trace Back Method. The base of the comparison is simulation result. Both the technologies are simulated with Xilinx software9.1i. The simulation result in the form of HDL synthesis report, Timing analysis and Power estimation. The Modified Register Exchange Method is Simpler than the Trace Back (TB) Method but its disadvantage is that every bit in the memory must be read and rewritten for each bit decoded.Using the ‘pointer concept; a pointer is assigned to each register with the help of this concept copying the contents of one register to another, the pointers are modified. Power dissipation, Performance, memory size is analyzed for both the modified Register Exchange method and TB method. The new Register Exchange Method shows an average power reduction of 45 percent. The memory is reduced by half.