Effect of Run-Time Triggered Multinet Trojan on Max-log-MAP Decoder

Abstract

The rapid growth in wireless communication has caused an increased demand for high speed error control decoders with improved BER performance. Turbo codes, the Shannon limit approaching codes, use Max-log-MAP decoders as the component decoders in the iterative decoding process. The demand for high speed error control decoders has led to an increased interest in the design of hardware-secure Max-log-MAP decoders with high throughput and reduced area. This paper focuses on designing a high throughput Max-log-MAP decoder with reduced area and analyzing the effect of a run time triggered multinet connected Trojan on its performance. High throughput is achieved by using radix-4 and radix-8 architectures and area is optimized using maximum sharing of resources (MSR) architecture. This architecture uses a modified add-compare-select unit designed by effectively utilizing the relationship existing between the branch metrics. Trojan analysis is performed by inserting a run time triggered multinet connected Trojan and comparing its performance with the Trojan free decoder.