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该论文提出了一种用于802.11a/g WLAN接收器的5阶切比雪夫梯形压缩扩展开关电容低通滤波器，通过基于信号瞬时值的增益切换来处理高峰均功率比(PAPR)，从而在保持高动态范围的同时降低功耗。
Delft University of Technology, Delft, Netherlands IBM, Burlington, VT 2 In wireless receivers, large dynamic range (DR) input signals necessitate additional power consumption in baseband active filters. A 5th order Chebychev, ladder type, companding SC low-pass filter is described in this paper which provides gain switching based on the instantaneous value of the signal to handle peak-to-average-power ratio (PAPR), thereby reducing power dissipation for a given DR. Companding compresses the high DR input signal, processes it in a lower DR system (the filter in our case) and then expands the signal at the output [1]. Companding is an alternative to AGC, which sets the filter internal gains during the preamble/midamble so that the signal level in the filter is optimal to provide the minimum SNDR required by the specifications. The IEEE 802.11a/g WLAN receiver [2] presents 2 limitations to the use of AGC. First, the standard
Vaibhav Maheshwari1, Wouter A. Serdijn1, John R. Long1, John J. Pekarik2