An Efficient Turbo Decoder for Wireless Sensor Networks

Abstract — Error correcting codes are an unavoidable part in digital communication such as data encoding, data decoding and data storage systems. Turbo codes are a class of error correcting codes that have recently been considered for energy constrained wireless communication applications. This paper focuses on the simulation of efficient turbo encoder and decoder for wireless sensor networks. Simulation of turbo encoder and decoder is done using Model Sim. The turbo encoder is simulated using flip flop method. Turbo decoder decodes the data using various MAP algorithms. The algorithms such as LUT Log MAP algorithm and Constant Log MAP algorithm are compared for simulating turbo decoder. The simulation results shows that turbo decoder simulated using constant Log MAP algorithm requires lesser area and hence lesser power consumption. The simulation of turbo encoder using flip flop method and decoder using constant Log MAP algorithm makes this decoder more efficient