In this paper, we propose a new memory efficient IFFT design method for OFDM-based applications, based on a signed integer mapping of three IFFT input signals which are composed of modulated data, pilot and null signals. The proposed method focuses on reducing the word size of memory in the first two stages of the single-path delay feedback (SDF) IFFT architectures since the first two stages require 75% of the overall memory. By Synopsys simulation of the first two stages of IFFT, it is shown that the proposed method achieves about 40% reduction in area and 44% reduction in power consumption compared with the previous work.
Due to the increasing requirements on the high speed communication and infotainment applications for automobiles, much research has been carried out for high speed automobile network technology called Media Oriented System Transport (MOST). Since many electronic control units (ECUs) are connected to the traditional automotive networks such as CAN, LIN and FlexRay, a network gateway is needed to bridge between MOST and other traditional networks. In this paper, we present a FlexRay-MOST gateway architecture. The proposed gateway system is designed with Verilog HDL and implemented using SoC kits.
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