An ultra-wideband low noise amplifier and spectrum sensing technique for cognitive radio.

摘要

A low power ultra-wideband, inductorless low noise amplifier (LNA) employing a noise cancellation architecture and designed in a commercially available 40nm 1.2V digital CMOS process is presented. The amplifier targets cognitive radio communication applications which cover the frequency range of 1-10 GHz and achieves an S11 -9.5 dB from 1.4 - 9.5 GHz. Within this bandwidth the maximum power gain is 13.4 dB, the maximum noise figure is 4.3 dB, and the miminum IIP3 is 0 dBm. The total power consumption of the LNA (neglecting the buffer required to drive the 50 O test equipment) is 8 mW. The total area consumed is 0.031mm2 excluding the pads.;A spectrum sensing technique using translational loop technique is also proposed to realize simultaneous spectrum sensing and data reception of cognitive radio. This technique also eliminates the need for tunable sharp band-select filter at the front-end.