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This letter proposes a novel channel-tracking scheme to improve the performance of the dedicated short-range communication (DSRC) systems affected by rapid fluctuations in channel envelopes. The proposed technique is called "iterative (turbo) compensation." It utilizes additional information extracted from the receivers output to further improve the accuracy of the channel estimation. Simulation results show that the iterative scheme performs better than noniterative techniques in higher constellation modulations at high vehicle speeds.

This paper presents an overview of budget management and its application to low-power CMOS design. Budget management involves the incremental distribution of delay within a circuit without violating timing constraints. In low-power applications, the assigned budget can be used to reduce combinational circuit area and power dissipation. The zero-slack algorithm for slack assignment (ZSA) and the maximum-independent-set-based algorithm (MISA) for budget management are discussed, while a gate-sizing algorithm for low-power applications of budget management is presented. In gate-sizing algorithms, the template of a gate on a non-critical path is replaced by a smaller template, thereby, reducing its power dissipation. In addition, ultra-low power optimization techniques such as multi-threshold CMOS and transistor stacks are introduced as potential low-power applications for budget management.