The existing mobile communication system suffer from problems like frequency selective fading and multi-path signals, multiple access interference due to imperfect nonorthogonal codes and narrow band interference due to coexisting systems. Multi-carrier Code Division Multiple Access (MC-CDMA) technique can combat these problems efficiently owing to its inherent properties. The objective of this...

Crosstalk in DSL leads to significant performance degradation and large loses in data-rate. Several crosstalk cancellation techniques have been proposed to address this problem, however, in the existing literature the analysis of these approaches is based on SNR calculations and the SNR-gap approximation. Furthermore, for crosstalk cancellation techniques based on decisionfeedback, the effect o...

The workflow of telecommunication operation support systems (telecomOSSs), which are a typical example of a heterogeneous domain model, often involves complicated cancellation processing. This paper proposes a ruledriven cancellation method and a middleware component that implements the method. They separate the cancellation process from the workflow and enable the OSSs to be made more flexible.

—Successive interference cancellation (SIC) is a technique, which can increase the capacity of a DS-CDMA system. Increase in capacity has been shown to approach theoretical limits for an AWGN channel [1]. For a practical channel from the viewpoint of cellular systems, significant increase in capacity using SIC has been shown in [2] even in the presence of estimation errors up to 50%. This capac...

The performance of a successive concatenated cancellation scheme for code-division multiple-access (CDMA) uplink transmission in cellular mobile radio is presented. Both serial and parallel cancellation stages are employed. The serial cancellation stage is first used to obtain initial data estimates followed by the parallel cancellation stages to enhance the accuracy of the estimates. The perfo...

BACKGROUND Unexpectedly poor response leading to IVF cycle cancellation is a distressing treatment outcome. We have prospectively assessed several markers of ovarian reserve in a high risk IVF population to determine their utility in predicting IVF cycle cancellation. METHODS Eighty-four women at high risk of cycle cancellation due to raised FSH, previous poor response and/or age > or =40 yea...

Successive Interference Cancellation is a promising technique for increasing the capacity of uplink CDMA channels. Fundamental research has shown that in an AWGN channel, the technique can approach the Shannon capacity[1]. However, a multipath channel presents a difficult challenge for interference cancellation, as each multipath component separated by more than a chip time appears to the recei...

We investigated on the possibility of an active cancellation system of unnecessary speech radiation. The intended application of this system is to cancel cellular speech, and also to cancel speech input for recognition-based dictation or speech-command control systems. Both of these applications do not require speech to be radiated into surrounding space, only into the input microphone, and wou...