Changhui Hu, S. Redfield, Huaping Liu, R. Khanna, J. Nejedlo, P. Chiang
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Transmitter equalization for multipath interference cancellation in impulse radio ultra-wideband(IR-UWB) transceivers
This paper presents a novel CMOS 2-tap equalizer for combating multipath interference in impulse radio, ultra-wideband (IR-UWB) transceiver systems. The equalizer is composed of pulse width control, pulse tap delay control, pulse sign inversion, and current mode logic (CML) summation for data transmission. SpectreRF post-layout simulation in a 90-nm CMOS technology shows that the transceiver operates up to a 2Gbps data rate by removing the 1st and 2nd multipath reflections, illustrating significant signal-to-noise (SNR) improvement when compared with a conventional transmitter.
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