In this paper, a wideband receiver with high dynamic range is proposed. At the front end of the proposed receiver, a sensing waveform is used to sense the input signal. And by adjusting the sensing waveform so as to project the interference to zero, the receiver can eliminate the strong interference signal adaptively before sampling. Both the theoretic analysis and simulation show that this met...

Use of Ultra-wideband (UWB) for wireless communication in home networking requires cost effective technical solutions with high quality. This paper investigates the performance of simple receiver with zero forcing equalizer in place of rake receiver for hermite based UWB communication. The UWB system with simple receiver is simulated for the application of image transmission over IEEE UWB chann...

Adaptive Array, with spatial processing, used in CDMA multiuser communications can enhance range, reliability and capacity. Moreover, the adaptive beamforming technologies can remove unwanted noise and interference from the received signal. In this paper, we propose four adaptive antenna receiver structures for DS/CDMA multiuser environment with multipath fading channels. LMS and RLS algorithms...

An effective linearization technique capable of equalizing IM3 products resulting from an arbitrary out-of-band blocking scenario in a wideband direct conversion receiver is presented. IM3 products are regenerated in the RF analog domain of a low-power mixed-signal feedforward path and are used to cancel analogous signal terms in the original receiver at digital baseband via adaptive equalizati...

The performance of a single-user ultra-wideband (UWB) communication system employing binary block-coded pulse-position modulation (PPM) and suboptimal receivers in multipath channels is considered. The receivers examined include a rake receiver with various diversity combining schemes and an autocorrelation receiver, which is used in conjunction with transmitted reference (TR) signaling. A gene...

An optical encryption method based on analog noise is proposed and experimentally demonstrated. The transmitted data is encrypted with wideband analog noise. Without decrypting the data instantly at the receiver, the data is damaged by the noise and cannot be recovered by post-processing techniques. A matching condition in both phase and amplitude of the noise needs to be satisfied between the ...

A current reused low-noise amplifier (LNA) with gain compensated to extend the bandwidth and is designed for ultra-wideband (UWB) wireless receiver. The design consists of two cascode common-source amplifier and an output buffer which is implemented in 0.18um RF CMOS process. The LNA gives 13.1dB gain; 9.1GHz 3dB bandwidth (3.1-12.2GHz) while consuming 13.9mW through a 1.8V supply. Over the 3.1...

We consider the problem of coarsely managed multiple access wideband systems, where each user can control its own transmission power and rate, independent of other users’ actions, according to the policy specified by central controlling agent: base station. Even with such coarse coordination, multiuser detection enables a system superior to any orthogonal division system like TDMA. We fully cha...

Recently, there have been increasing interests to characterize the UHF wideband mobile reception. In the literature, there are several studies on UHF mobile reception for cellular phone systems, however, most of them addresses narrowband services. This paper presents propagation measurement results on UHF TV band using the ATSC Digital Television as a sounding signal to study the characteristic...

In this paper, the significance of linearity for UWB front-end circuit is discussed. The effects of strong narrow band interferer on UWB signal are investigated. Wideband linearization techniques for UWB LNA are first proposed in this work. A high linearity UWB LNA is designed in TSMC 0.18μ CMOS process The simulation results show that the designed LNA exhibits very high IIP3 (6.9~13.8 dBm) whi...