1 Abstract—Time Reversal (TR) is a technique to focus broadband signals tightly in time and space. Previously, this technique has been used in acoustics, medical and especially in underwater communication applications. It is capable of reducing noises, such as: Inter-Symbol Interference (ISI), InterUser Interference (IUI). . . , while the used equipments are more simple than complex Equalizers ...

Receivers based on channel equalization have proven to be one of the most promising candidates for terminal receivers in wideband code-division multiple-access (WCDMA) downlink. The channel equalizers provide multiple access interference (MAI) suppression, and thus ensure adequate receiver performance even with a high number of active users. However, the suitability of the equalizers to soft ha...

This paper presents a signal processing model for the delay-hopped transmit-reference ultra wideband communications system introduced by Hoctor and Tomlinson. In that paper, a single-user receiver based on a bank of correlators and a sliding window integrator was proposed. However, the radio propagation channel also introduces correlations, which have a significant effect not taken into account...

A orthogonal decomposition of a general wideband space-time multipath channel is derived assuming antenna arrays at both the transmitter and receiver. Knowledge of channel state information at the transmitter is used to decompose the channel. This decomposition serves as a framework for eeciently managing the degrees of freedom in the space-time channel to trade-oo diversity and throughput. Sig...

This paper investigates an adaptive iterative spacetime interference cancellation receiver for Wideband Code Division Multiple Access (W-CDMA). Each iteration of the interference cancellation includes adaptive beamforming, adaptive path-combining and soft-input soft-output decoding. The complexity of the demodulation process using very simple Normalized Least Mean Square (N-LMS) adaptive algori...

New silicon CMOS processes developed primarily for the burgeoning wireless networking market offer significant promise as a vehicle for the implementation of highly integrated receivers, especially at the lower end of the frequency range proposed for the Square Kilometre Array (SKA). An RF-CMOS “Receiver-on-a-Chip” is being developed as part of an Australia Telescope program looking at technolo...

In wideband DS-SS systems the Rake receiver is commonly used to utilize the multipath diversity of the mobile radio channel. In the case of good spreading code correlation properties the multipath components of the received signal can be separated with low interpath interference (IPI). At low spreading gains the good correlation properties of the spreading codes are lost and the Rake receiver p...

This paper focuses on the performance evaluation of a Direct Sequence Spread Spectrum (DS-SS) Ultra Wideband (UWB) network in an indoor environment where receiver and transmitter positions are fixed. In particular, a novel distance and time dependent impulse response has been obtained and considered for our performance evaluation. Moreover, from receiver side, a Minimum Mean Square Error (MMSE)...

In this paper, we review the four receiver architectures and four methods for multi-standard receiver design. Propose reconfigurable RF block can be used for both low-IF and direct conversion architecture. Also, using reconfigurable mixer method, it can be operated at 2~6 GHz range for multistandard receiver. It consists of wideband mixer, filter, and automatic gain control amplifier and to get...

A Software Defined Radio (SDR) is a radio receiver and/or transmitter, whose characteristics can to a large extent be defined by software. Thus, an SDR can receive and/or transmit a wide variety of signals, supporting many different standards. In our research, we currently focus on a demonstrator that is able to receive both Bluetooth and HiperLAN/2. This helps us to identify problems associate...