A demonstration of a real-time full-duplex wireless link is presented, in which a pair of full-duplex transceivers perform simultaneous transmission and reception on the same frequency channel. A full-duplex transceiver is composed of a custom-designed small-form-factor analog self-interference canceller, and a digital self-interference cancellation implementation is integrated with the Nationa...

This paper presents a noise-robust, fast-convergence echo canceller and its implementation on a multimedia RISC (Reduced Instruction Set Computer). Faster convergence is achieved by introducing an improved noise power estimator for step-size control. This echo canceller has been implemented on V830 multimedia embedded RISC and has been integrated into a car navigation system. V830 provides perf...

In this paper a pipelined realization of a Transform Domain adaptive beamformer, is presented. The sliding Discrete Fourier Transform is utilized for the data transformation. The adaptation process is performed by the Delayed Least Mean Squared, Gereralize Sidelobe Canceller. By proper retiming of the introduced delays, fully pipelined architectures are derived, suitable for parallel implementa...

In this paper, successive interference canceller (SIC) is adopted for the performance enhancement of a multicarrier DS/CDMA system and its performance is analyzed in a Rayleigh fading channel. A successive interference canceller is employed for each subcarrier of a multicarrier DSlCDMA system and the outputs of SICs are combined through the maximal-ratio or equal-gain combining. Numerical resul...

This paper deals with cross talk cancellation for high density optical recording. The data density can be increased reducing the track pitch, as long as cross talk is kept under control. To cope with interference from adjacent tracks, we propose and analyze an adaptive nonlinear cross talk canceller based on a three spot detection system. The optical channel is accurately modeled by a two-dimen...

In conventional full duplex wireline systems digital echo cancellers are commonly used to suppress echo. For applications with asymmetric rates the complexity and performance of the echo canceller depend on the implementation of the rate matching function. When the transmit rate is lower than the receive rate, traditional approach of resampling before filtering is inefficient. We show that effi...

The Carrier Super-Positioning Satellite System is a promising telecommunication system because the frequency efficiency is double that of existing satellite systems. In this technique, we can use the same frequency band for inbound and outbound signals which are currently used in separated bands. Interference canceller used in the carrier super-positioning system is degraded a lot by the nonlin...

Fig. 1.?Shows abscess cavity with fluidlevel in the peripheral part of the lower lobe of the right lung. Fig. 1.?Shows absces cavity with fluidlevel in the peripheral part of the lower lobe of the riaiht lunar. Fig. 2.?Shows skiagram taken on the 5th postoperative day after right lower lobectomy. The seventh rib is resected and smaller segments of 8 and 9 ribs have been removed with the lobe. T...