摘要：以数字电视解调端256阶平方根升余弦滚降(SRRC)滤波器的设计为例,比较了直接型和转置型高阶FIR滤波器的FP-GA实现,分析了两种滤波器结构各自的优缺点。

摘要：This paper presents an integrated power management unit （PMU） for a battery-operated wireless endoscopic system. This PMU is integrated with a baseband chip in standard 0.18μm CMOS technology,promising low cost, ease in PCB design, and a minimum in system size. The optimized power supply architecture is derived from comparison. Circuits of sub blocks are presented in detail. As a result, only five small off-chip capacitances are required by PMU with an overall quiet current consumption of less than 100μA. Moreover,a digital calibration method is adopted to alleviate the effect of process variation. The achieved performance is also demonstrated with corresponding measurement results.

摘要：A 2.4GHz ASK transmitter suitable for a low power wireless capsule endoscope system is presented. A mixer-based frequency up-conversion transmitter architecture is employed to achieve a high data rate. A pseudodifferential stacked class-A power amplifier using the current reuse technique is proposed to save power. The transmitter mainly includes two parts： a 20MHz ASK modulator based on a constant amplitude phase lock loop （PLL） and a direct up-conversion RF circuit. This design, implemented in a TSMC 0.25μm CMOS process, achieves a - 23. 217dBm output power with a data rate of 1Mbps and dissipates 3.17mA of current with a single 2.5V power supply.

摘要：This paper proposes a cochlear prosthetic system with an implanted digital signal processor （DSP）. This system transmits voice-band signals with a low data rate through the wireless link, free of the data-rate limitation and suitable for future development. By optimizing the speech processing algorithm and the DSP hardware design, the implanted DSP manages to execute the continuous interleaved sampling （CIS） algorithm at a clock frequency of 3MHz and a power consumption of only 1.91mW. With an analytic power-transmission efficiency of the wireless inductive link （40%）, the power overhead caused by the implanted DSP is derived as 2.87roW,which is trivial when compared with the power consumption of existing cochlear prosthetic systems （tens of milliwatts）. With the DSP implanted,this new system *** easily developed into a fully implanted cochlear prosthesis.

摘要：基于SELP算法模型原理,设计了一款高质量多速率语音专用处理器芯片。芯片使用可重构体系结构和超长指令字系统设计方法,将复杂度高的子程序进行优化,能够显著提高指令并行度。仿真结果表明,在该芯片上实现语音压缩编码算法,执行效率高于相同工艺水平的通用DSP,并保持原有编码质量。该处理器能够实现多种类型的语音压缩算法,可以达到对语音算法的高保密性、低复杂度和易开发性。

摘要：设计了一种在Linux下车载移动终端自适应无线通信模块的方法,通过硬件转接板、通用时序的控制,给无线通信模块上电,然后尝试获取无线通信模块的PID/VID,再通过发送AT指令获取模块版本类型来进行模块智能识别,最后通过面向对象语言的多态功能对无线通信模块进行初始化操作。实现车载终端和代码都不需要作出更改的情况下就可以使用多种不同的无线通信模块的功能。

摘要：A 1.1 - 1.2GHz CMOS high phase accuracy,low amplitude mismatch quadrature LO driver is presented,which consists of a high frequency amplifier,an integrated poly phase filter, and an I/Q phase and magnitude calibration circuit（PMCC）. The proposed PMCC uses a feed-forward calibration technique. It improves the phase accuracy and reduces the amplitude mismatch with low power consumption. Simulation results show that phase error with PMCC is reduced to about one half and the amplitude mismatch is reduced to about one tenth, when compared to the LO driver without PMCC. Moreover,the calibration circuit also functions as a buffer to drive mixers, thus no additional buffer is needed in this design. The LO driver is implemented in a TSMC 0.25μm CMOS process. Experimental results show that the LO driver achieves high quadrature accuracy （〈2°） and low amplitude mismatch （0. 1%）. It has about 5.25dB gain and dissipates 6mA from the 2.5V power supply. The size of the die area is only 1.0mm×1.0mm.

摘要：多数 ITO透明导电玻璃生产线在实现 Si O2 膜与 ITO膜在线联镀时 ,应用 Si O2 靶射频溅射沉积 Si O2膜工艺和 ITO靶直流溅射沉积 ITO膜工艺 ,如果 Si O2 膜应用硅靶反应磁控溅射工艺 ,存在这种工艺是否可以与 ITO靶直流溅射沉积 ITO膜工艺在线联用以及如何实现联用的问题。作者对现有的生产线进行了改造设计、加工 ,做了大量实验、质谱分析和多项测试研究 ,成功地实现反应溅射 Si O2 膜与 ITO膜在线联镀 ,做到Si O2 镀膜室的工作状态的变化基本上不影响

摘要：介绍了H.264去块滤波的基本原理,并基于滤波强度预判的思想提出了一种快速去块滤波算法。通过软件实现验证了该算法在不影响解码图像质量的前提下较标准中的算法节省了约70%的滤波运算量,有效提高了软件解码器的运行速度,有助于H.264解码器实时应用的实现。

摘要：针对无线视频传输系统中数据帧长度变化较大、信源数据速率不断变动的特点,提出一种基于中继的低延时协作视频传输系统。给出传输延时的表达式,分析协作中继系统降低传输延时的原因。设计系统的中继策略和调制编码方案,以提高系统的传输质量。仿真结果表明,该传输系统可以有效地降低视频传输的延时,并获得误码率性能增益。