This paper presents a solution to design and implement a hardware error detection and correction circuit using associative memories. This type of memory allows search of a binary value stored, having input data a partial (or modified) amount of this value. This property can be used in communication, for detection and correction of errors. In our analysis, the obtained experimental results were ...

We present an analytical model that extends previous analyses of CDMA systems in practical multipath environments where users can operate at different bit rates. This scenario is of interest for the Wideband CDMA strategy employed in UMTS, and the model permits to compare performances of classic and more innovative spreading signals. Key-Words: DS-SS, WCDMA, Spreading Sequences, Multipath, Bit ...

In this paper we formulate an optimized temporal error concealment approach for H.264 based on the study of the performance of several temporal concealment features that apply to the different steps of the proposed method. Specifically we study how the concealment performance is affected by matching error measures, motion vector candidates and estimation enhancements. We show that the resulting...

In this paper, a radio physical layer for a wireless fieldbus network is proposed. For this, a model is described and a performance evaluation is presented, by means of both measurements and analytical calculations of the Bit Error Rate (BER), using the Direct Sequence Spread Spectrum (DSSS) technology in static and dynamic modes, and of the timing of the basic message cycle, using Profibus as ...

Abstract SPACE-time coding is a transmit diversity scheme with optional receive diversity to achieve high data rate and to improve the reliability of a wireless channel. In the past, STBC has full rate and full diversity for four transmit antennas. This technique has high cost and high complexity due to the more feedback information. In this paper, feedback-rotated QOSTBC technique is used to i...

This work aims at proposing a higher-order moments analysis, in order to obtain an effective characterisation (in a Non-Gaussian sense) of the global DS/CDMA noise in case of few-user systems and short spreading codes. The use of the Edgeworth series expansion, whose terms are directly linked with the statistical cumulants allows to reach a good approximation of the unknown probability density ...

Reliability of the current microprocessor technology is seriously challenged by radiation-induced soft errors. Accurate Vulnerability Factor (VF) modeling of system components is crucial in designing costeffective protection schemes in high-performance processors. Although Statistical Fault Injection (SFI) techniques can be used to provide relatively accurate VF estimations, they are often very...

Abstract—In this paper, we have analyzed and compared the performance of various coding schemes. The basic ID prime sequence codes are unique in only dimension, i.e. time slots, whereas 2D coding techniques are not unique by their time slots but with their wavelengths also. In this research, we have evaluated and compared the performance of 1D and 2D coding techniques constructed using prime se...

the aim of the present study was to investigate the manipulation of senses and speed on the performance of bimanual dynamic coordination. thus, 15 physical education students of shahid beheshti university with age range of 18-25 years performed in-phase and anti-phase patterns from slow to fast speed in five different sensory conditions. to investigate two motor patterns anova with repeated mea...

An error correction procedure is currently being deened by ITU-T under the name of \Service Speciic Connection Oriented Protocol". It is to be used in the B-ISDN in conjunction with AAL5 in order to provide an error-free data link layer. We study the performances of the procedure in terms of end-to-end delay. An analytical model is presented, which allows to address various traac engineering as...