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The authors present a turbo soft-in soft-out (SISO) decoder based on Max-Log maximum a posteriori (ML-MAP) algorithm implemented with sliding window (SW) method. A novel technique based on branch metric normalization is introduced to improve the speed performance of the decoder. The turbo decoder with the proposed technique has been synthesized to evaluate(More)
— This paper presents a method to reduce the computation and memory access for variable block size motion estimation (ME) using pixel truncation. Previous work has focused on implementing pixel truncation using a fixed-block-size (16×16 pixels) ME. However, pixel truncation fails to give satisfactory results for smaller block partitions. In this paper, we(More)
The authors present a reconfigurable soft-input soft-output (SISO) turbo decoder based on Max-Log maximum a posteriori (ML-MAP) algorithm implemented with a sliding window (SW) method. The turbo decoder is designed to support constraint lengths from 3 to 5 and synthesized to a 0.18um standard CMOS cell library. Power and area overheads for the(More)
—This paper proposes a low power commutator architecture for the implementation of radix-4 based pipelined Fast Fourier Transform processor. The architecture is based on dual port RAM blocks and exploits the interconnection topology among these blocks for low power implementation. The paper presents the commutator architecture, describes the design(More)
The foundations for building the first Reliable Reconfigurable Real-Time Operating System (R3TOS) are presented. The main objective of R3TOS is to create an infrastructure for coordinately executing specialized hardware tasks upon a reconfigurable FPGA device, achieving the necessary flexibility for both gaining system performance (true hardware(More)
—This paper presents a novel instruction cell-based re-configurable computing architecture for low-power applications, thereafter referred to as the reconfigurable instruction cell array (RICA). For the development of the RICA, a top-down software driven approach was taken and revealed as one of the key design decisions for a flexible, easy to program,(More)
Temperature and radiation tolerant electronics, as well as long life survivability are key capabilities required for future NASA missions. Current approaches to electronics for extreme environments focus on component level robustness and hardening. However, current technology can only ensure very limited lifetime in extreme environments. This paper(More)