针对超大规模集成电路的发展以及无线射频芯片中带宽可变的需求,提出一种低功耗可配置级联积分梳状(Cascade Integral Comb, CIC)滤波器结构。该结构采用半字节串行算法优化ASIC电路内部位宽,借助多路复用技术减少运算逻辑和存储逻辑单...针对超大规模集成电路的发展以及无线射频芯片中带宽可变的需求,提出一种低功耗可配置级联积分梳状(Cascade Integral Comb, CIC)滤波器结构。该结构采用半字节串行算法优化ASIC电路内部位宽,借助多路复用技术减少运算逻辑和存储逻辑单元,并在增益校正部分采用正则有符号数(Canonic Signed Digit, CSD)编码乘法代替全位宽二进制补码乘法,从而实现低功耗目的。信道带宽配置模块选取CIC滤波器采样因子,实现带宽可变功能。通过MATLAB Simulink搭建抽取滤波器模型以验证算法可行性,并采用verilog HDL完成代码设计,仿真结果表明该滤波器可实现2~16倍下采样。基于65 nm COMS标准单元工艺库进行DC综合和ASIC版图设计,与传统CIC滤波器比较,数字电路在功耗方面具有显著优势。展开更多
Antenna array gain is a relative measure of performance defined differently in various literature. Most definitions of gain are not power consistent, and thus cannot be used directly in link budget analysis. In this s...Antenna array gain is a relative measure of performance defined differently in various literature. Most definitions of gain are not power consistent, and thus cannot be used directly in link budget analysis. In this short paper, we present a power correction factor for common definitions of power gain of antenna arrays that allows them to be used in standard link budget calculations.展开更多
文摘Antenna array gain is a relative measure of performance defined differently in various literature. Most definitions of gain are not power consistent, and thus cannot be used directly in link budget analysis. In this short paper, we present a power correction factor for common definitions of power gain of antenna arrays that allows them to be used in standard link budget calculations.
