Comparative Analysis of Modified Register Exchange Method and Trace Back Method of Viterbi Decoder for Wireless Communication
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.