A new and efficient class of nonlinear receivers is introduced for digital communication systems. These “iterated-decision” receivers use optimized multipass algorithms to successively cancel interference from a block of received data and generate symbol decisions whose reliability increases monotonically with each iteration. Two variants of such receivers are discussed: the iterated-decision e...

In this paper, two new efficient detection algorithms, Type 1 (T1) with better complexity-performance tradeoff and Type 2 (T2) with lower complexity, are derived from one generalized framework for multiple-input multipleoutput (MIMO) communication systems. The proposed generalized detection framework constructed by parallel interference cancellation (PIC), group, and iteration techniques provid...

In this paper, several receivers for data demodulation in an asynchronous direct-sequence code-division multiple access (DS-CDMA) system operating without prior knowledge of the propagation delays are proposed and compared. Special attention is paid to the near-far problem, and the proposed schemes are numerically shown to be near-far robust. The near-far robustness is obtained by estimating th...

In an article published in System Vol. 40 Andrew Sampson (2012) made several claims regarding the positive effect of “coding” or “marking” of second language writing errors and how the use of said coding can have a positive effect on the number of errors appearing in L2 writers’ subsequent writings. However, upon closer examination of the article’s methodology, we feel such a claim regarding th...

Several specific low-bitrate coding strategies are examined through their effect on linear–quadratic (LQ) control performance. By limiting the subject to these methods, we able identify principles underlying for control, a of significant recent interest but few tangible, i.e., implementable, results. In particular, consider quantized output signal deploying period-two codes differing delay-vers...

It is widely acknowledged that there is great potential for utilizing databases in health care systems in developed countries.1 Modern health care databases have two characteristics that make them attractive to epidemiologists who work on ‘real-world’ problems: routinely conducted data collection and perpetual electronic data storage. Pharmacoepidemiology and health services research have long ...

In this paper, we investigate the impact of Forward Error Correction (FEC) codes namely Cyclic Redundancy Code and Convolution Code on the performance of OFDM wireless communication system for speech signal transmission over both AWGN and fading (Rayleigh and Rician) channels in term of Bit Error Probability. The simulation has been done in conjunction with QPSK digital modulation and compared ...