In this paper multi-user detection techniques, such as Parallel and Serial Interference Cancellations (PIC & SIC), General Minimum Mean Square Error (GMMSE) and polynomial MMSE, for the downlink of a broadband Multi-Carrier Code Division Multiple Access (MCCDMA) system are investigated. The Bit Error Rate (BER) and Frame Error Rate (FER) results are evaluated, and compared with single-user dete...

this paper presents an accurate differential global positioning system (dgps) using multi-layered neural networks (nns) based on the back propagation (bp) and imperialistic competition algorithm (ica) in order to predict the dgps corrections for accurate positioning. simulation results allowed us to optimize the nn performance in term of residual mean square error. we compare results obtained b...

This paper presents a technique for integrating multiple threads of computation for simultaneous execution and which is well suited for fault-tolerant application programs. A post-pass compiler has been developed that is capable of taking the application program as the host thread and automatically integrating the additional code as a guest thread to produce a composite thread, the execution of...

As an alternative to the oversimplified error schemes currently adopted in establishing quality control (QC) strategies, a complex model was assumed implying (a) the distribution of errors (critical error is regarded as a value discriminating between "effective errors" to be detected and "subcritical errors" which do not interfere with the medical decision whose detection is considered as a fal...

Performance Comparison of MLSE and Iterative Equalization in FEC Systems by iterative decoding of the channel correlations and the error-correction code. Evaluating the Performance of error correcting codes in AWGN channel in see the comparison that bit error performance is decreased by using Hamming error. demonstrate the similar bit error rate (BER) performance to that of random are excellent...

Activity in the anterior cingulate cortex (ACC) has been linked to the processes of error detection and conflict monitoring, along with the subsequent engagement of cognitive-control mechanisms. The error-related negativity (ERN) is an electrophysiological signal associated with this ACC monitoring process, occurring approximately 100 ms after an error is made. The current study examined the po...

We explain the poor out-of-sample performance of mean-variance optimized portfolios, developing theoretical bias adjustments for estimation risk by asymptotically expanding future returns of portfolios formed with estimated weights. We provide closed-form non-Bayesian adjustments of classical estimates of portfolio mean and standard deviation. The adjustments significantly reduce bias in intern...

Abstract A K-user direct-sequence spread-spectrum code-division multiple-access (CDMA) system with (q log2 K)-bit baseband signal quantization at the demodulator is considered. It is shown that additionally quantizing the K + 1 level output signal of the CDMA modulator into q bits improves significantly the average bit-error performance in a non-negligible regime of noise variance, σ 2, and use...