A fully integrated BPSK amplitude and spectrum tunable transmitter for IR-UWB system

Abstract

A 3-5 GHz low power BPSK modulated impulse radio UWB transmitter is implemented in 0.13 µm CMOS technology. In this design the amplitude and spectrum of the output impulse are both tunable to solve the special problem in IR-UWB, where it is difficult to control the spectrum. Measurement results indicate that, by changing the control bits in the gain control circuit and differential circuit, the 3-step peak-to-peak voltage amplitudes are 240, 170 and 115 mV and the center frequency of the impulse can be tuned from 3.2 to 4.1 GHz. A power controlled output buffer is designed to drive the antenna. The total power consumption is only 4.44 mW when transmitting a baseband signal of 100 MHz. The chip area is 1.2 × 1.4 mm 2 .

Design and Performance Evaluation of a 10GHz 32nm-CNTFET IR-UWB Transmitter for Inter-Chip Wireless Communication

“…, where B = f H −f L represents the bandwidth and is the centre frequency with f H denoting the upper cut-off frequency with the -10 dB emission limit, and f L the lower cut-off frequency with the -10 dB emission limit [8]. Presently, there are three main competing technical approaches to the development of UWB systems: 1) multi-band OFDM (MB-OFDM), 2) direct-sequence UWB (DS-UWB) and 3) carrierless impulse radio UWB (IR-UWB) [9]. The IR-UWB, being an impulse based system, needs no FFTs, no DACs and no fast hopping synthesizers.…”