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Spectrum shaping SAW filters for high-bit-rate digital radio

机译:用于高比特率数字无线电的频谱整形SAW滤波器

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摘要

The structure of a QAM radio system is explained. Some novel designs that demonstrate the current status of spectral shaping SAW (surface acoustic wave) filters are presented. Compensation of second-order effects is discussed. Experimental results for a filter for a 140-Mb/s 16 QAM cochannel system with a roll-off factor of 0.19 are shown. Two other examples of filters for a 140-Mb/s, 64 QAM system with a 35% relative bandwidth are also presented.
机译:说明QAM无线电系统的结构。提出了一些新颖的设计,它们演示了频谱整形SAW(表面声波)滤波器的当前状态。讨论了二阶效应的补偿。给出了140-Mb / s 16 QAM共信道系统的滤波器的实验结果,其滚降因子为0.19。还提供了两个其他示例,用于具有35%相对带宽的140 Mb / s,64 QAM系统。

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