When using electrical-balance duplexers (EBDs) to provide RF self-interference cancellation for in-band full-duplex, in-band distortion produced by nonlinear CMOS switches in the duplexer cause distortion that limits the headroom for additional self-interference cancellation in subsequent cancellation schemes in the transceiver. A prototype EBD is fabricated in 0.18μm SOI CMOS to investigate th...

In broadband DS-CDMA uplink transmission using frequency-domain equalization (FDE) without cyclic prefix (CP) insertion, the transmission performance degrades due to inter block interference (IBI) and circular property loss. In this paper, IBI cancellation and circular property loss restoration is proposed and the performance improvement is evaluated by computer simulation. It is shown that ite...

Adaptive duplexing eliminates the need for multiple switched duplexers in multiband systems. The technique is based on combining a low isolation device and an active double loop cancelling scheme. A duplexer provides attenuation to the main Tx signals entering the receiver and Tx noise corrupting the receiver band. The solution is tested on a direct conversion receiver and uses an adaptive oned...

The performance of three optics-based interference cancellation systems are compared and contrasted with each other, and with traditional electronic techniques for interference cancellation. The comparison is based on a set of common performance metrics that we have developed for this purpose. It is shown that thorough evaluation of our optical approaches takes into account the traditional noti...

In this paper, echo cancellation is done using genetic algorithm (GA). The genetic algorithm is implemented by two kinds of crossovers; heuristic and microbial. A new procedure is proposed to estimate the coefficients of adaptive filters used in echo cancellation with combination of the GA with Least-Mean-Square (LMS) method. The results are compared for various values of LMS step size and diff...

In this paper the neural network based lter for nonlinear interference cancellation is developed. The Hyper Radial Basis Function (HRBF) network with associated Manhattan learning algorithm is proposed for non-linear noise cancellation under assumption that reference noise is available. The HRBF network is a generalization of radial basis function (RBF) and generalized radial basis function (GR...

Microphone arrays are powerful tools for noise suppression in a reverberant room. Generalized Sidelobe Canceller (GSC) that exploits Minimum Variance (MV) criterion is efficient in interference suppression when there is no correlation between the desired signal and the interferences. Correlation between the desired signal and any of interference produces a desired signal cancellation and degrad...

Multivariate Hensel construction with floating-point numbers often cause large cancellation errors which are errors due to a cancellation of almost the same numbers. Sasaki and Yamaguchi [SY98] showed that multivariate Hensel construction causes large cancellation errors if the expansion point is chosen near a singular point, and Sasaki [Sas00] studied four mechanisms of term cancellations near...

We introduce a new device in the study of abstract elementary classes (AECs): Galois Morleyization, which consists in expanding the models of the class with a relation for every Galois (orbital) type of length less than a fixed cardinal κ. We show: Theorem 0.1 (The semantic-syntactic correspondence). An AEC K is fully (< κ)-tame and type short if and only if Galois types are syntactic in the Ga...

Visual neglect is a relatively common deficit after brain damage, particularly strokes. Cancellation tests provide standard clinical measures of neglect severity and deficits in daily life. A recent single-case study introduced a new variation on standard cancellation. Instead of making a visible mark on each target found, the patient made invisible marks (recorded with carbon paper underneath,...