Digital signal processing (DSP) has undergone a remarkable increase in interest and attention in recent years. Adaptive signal processing, which is a mainly time varying DSP, is a very important part of DSP. The fundamental problem associated with adaptive signal processing is short-time signal analysis and its major challenge is efficiency versus accuracy. Most of the research and development efforts in the area of circuit and system VLSI designs have been oriented towards high speed operation and with minimum area. This picture is, however, undergoing some radical changes mainly because of the remarkable success and growth of the portable consumer electronics market. Although speed and area are still the metrics by which we can measure implementation quality, a major creative challenge facing today's circuit and system CMOS VLSI designers is to design new generation products which consume minimum power. Lowering the supply voltage is the most effective way to achieve low power performance. One of the promising low-voltage circuit techniques is multithreshold-voltage CMOS (MTCMOS) technology. However, it is still in the simulation or test-chip-fabrication stages and has not yet been used in designing a system-like VLSI, such as a DSP or a microprocessor, and its effectiveness has not yet been established. In this project, the recursive procedure for real-time applications is developed using the half-sine wave window. The CMOS VLSI technology is used to design an algorithm-specific DSP for the short-time signal analysis. The 3.3 V supply voltage, which is the new industry standard for IC operating voltage, is used for the CMOS VLSI design. The supply voltage is further reduced to 1.5 V using a MTCMOS technology. The DSP design includes logic design, CMOS VLSI circuit implementation, and circuit simulation. The low power process and device are also studied theoretically. This work shows that the computational speed can be increased 50% without losing processing accuracy in a short time signal analysis and that 1.5 V MTCMOS technology can reduce the DSP power consumption 80% compared with 3.3 V CMOS technology while maintaining high speed and without increasing too much layout area.
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机译：近年来，数字信号处理（DSP）受到了极大的关注和关注。自适应信号处理（主要是随时间变化的DSP）是DSP的重要组成部分。与自适应信号处理相关的基本问题是短时信号分析，其主要挑战是效率与准确性之间的关系。电路和系统VLSI设计领域中的大多数研究和开发工作都以高速运行和最小的面积为导向。但是，由于便携式消费类电子产品市场的巨大成功和发展，这种情况正在发生一些根本性的变化。尽管速度和面积仍然是衡量实施质量的标准，但当今的电路和系统CMOS VLSI设计人员面临的主要创新挑战是设计功耗最低的新一代产品。降低电源电压是实现低功耗性能的最有效方法。一种有前途的低压电路技术是多阈值CMOS（MTCMOS）技术。但是，它仍处于仿真或测试芯片制造阶段，尚未用于设计类似系统的VLSI（例如DSP或微处理器），并且尚未确定其有效性。在该项目中，使用半正弦波窗口开发了用于实时应用的递归过程。 CMOS VLSI技术用于设计算法特定的DSP，用于短时信号分析。 CMOS VLSI设计使用3.3 V电源电压，这是IC工作电压的新行业标准。使用MTCMOS技术将电源电压进一步降至1.5V。 DSP设计包括逻辑设计，CMOS VLSI电路实现和电路仿真。对低功耗工艺和器件也进行了理论研究。这项工作表明，在短时间内进行信号分析时，可以将计算速度提高50％而不会降低处理精度，并且与3.3 V CMOS技术相比，1.5 V MTCMOS技术可以将DSP功耗降低80％，同时保持高速且也不会提高布局面积大。
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