High rate UWB CMOS transceiver chipset for WBAN and biomedical applications

Abstract

International audienc

A 100 MHz PRF IR-UWB CMOS Transceiver With Pulse Shaping Capabilities and Peak Voltage Detector

“…To optimize the bit rate and/or the communication range with a NC receiver while the maximum mean power given by FCC is respected, it is proposed here to use a Random Alternate On-Off Keying modulation (RA-OOK) [6]. This modulation does not have discrete spectrum in its PSD but is similar to an OOK modulation from the receiver point of view.…”

“…For medium rate, a solution to reduce power consumption is to achieve a duty-cycling at burst rate. As presented in [6], this approach can reach the same energy efficiency as in a bit rate duty-cycled system, while the duty-cycling clock precision is moved towards a few tens of microseconds which releases constraints on the CDR jitter characteristics. In this case, the required idle time T IDLE to maintain constant the Power Spectral Density (PSD) is equal to T SWEEP (1 -PRF MEAN / PRF BURST ) where T SWEEP is the sweep time imposed by FCC to measure the PSD (1ms), PRF BURST the Pulse Repetition Frequency (PRF) during the burst, and PRF MEAN the mean PRF averaged on T SWEEP .…”

An Efficient Method of Power Spectral Density Estimation for On-Chip IR-UWB Transmitter Self-Calibration

“…This analysis can also be found in (1) where ϕ(t) gives its complex nature to the baseband signal. By assuming that the instantaneous phase is a differentiable function, it is possible to express the instantaneous frequency as follows:…”

Three to Five Gigahertz UWB Transmitter for Vital Sign Monitoring Systems

“…As delay cell are highly sensitive to PVT variations, the use of voltage controlled delay line allows the compensation of this variations. Two edge (V j and V k ; j,K ϵ [0.7]) are combined to produce complementary baseband pulses (Vc-i-n and Vc-i-p, i ϵ [1][2][3][4]) to control the transmission gate of different current cells (Fig. 8a).…”

“…Ultrawideband (UWB) technology is a good candidate for this biomedical application [3]. Indeed, it presents many advantages including little radiation making it harmless to human tissues, low power consumption, good coexistence with other instruments, and robustness to interference and multipath fading.…”