Evaluation Of Bit Error Probability Research Articles

Evaluation of Bit Error Probability for CPM MIMO Systems in Rayleigh Channel

Space time codes (STC) design employing continuous phase modulation (CPM) is well suitable for a multi-antenna system with low power and compact spectrum. Although STC design criteria for CPM MIMO system have been developed to date, the evaluation of performances with CPM MIMO system requires more general results like linear modulations such as PSK, QAM and so on. In this paper, Laurent decomposition is first applied and the conclusions of PAM signals in MIMO systems are extended to CPM MIMO systems. Thereby the average exact bound of bit error probability is derived. Further, space time block codes with CPM MIMO are introduced and its decoding is simplified for Monte-Carlo simulation. Finally, analytical and simulated results have confirmed the performances of CPM MIMO system.

Analytical Performance Evaluation of Optical DQPSK Systems With Postdetection Filtering

A novel analytical method for evaluating the performance of optical transmission systems using differential quadrature phase-shift keying is presented. It is shown that the bit-error probability (BEP) can be evaluated through the statistics of the received signal phase difference directly filtered by the postdetection filter. The accuracy of the method is checked against the results obtained through a simulator based on the multicanonical Monte Carlo algorithm. Some results in terms of BEP evaluation and nonlinear phase noise issues are also provided.

Analysis of differentially coherent linear receivers over rician-faded CDMA channels

RicianAccurate performance analysis for linear receivers over frequency- and time-selective asynchronous code-division multiple-access Rician-fading channels is very useful and a general approach to this topic is very desirable. In this paper, by using a decision variable-based moment generating function approach, we provide a unified bit-error probability (BEP) analysis framework for different linear detectors with binary or quaternary differential phase-shift keying and postdetection combining over Rician-fading channels, taking into account the effects of the spreading code correlation, the system and fading-channel parameters, diversity combining, and branch correlation. To reduce the complexity of the exact BEP evaluation, we furthermore provide an approximate multivariate Gaussian assumption (MGA)-based method which entails a low complexity for BEP evaluation. Ideal and approximate linear minimum mean-squared error diversity receivers for correlated Rician-fading channels are proposed. Numerical results show that the phases of the line-of-sight (LOS) components of the desired user significantly affect the receiver performance over correlated multipath Rician channels, and this may be exploited to improve performance. Also, when the LOS components are affected by a significant Doppler shift, automatic frequency control is very useful in improving the receiver performance.

An analytical evaluation of bit error probability in mobile radio systems with 12PM3 modulations

An analytical method is presented for the error probability evaluation that can be used in many cases to reduce significantly the computation time with respect to that required by simulation techniques. The method can take into account thermal noise, intersymbol interference caused by intermediate frequency (IF) and baseband (BB) filterings, multipath propagation with typical delay spreads, Rayleigh fading, and random FM noise. A number of results are presented relevant to multipath fading channels with different vehicle speeds, several modulation techniques belonging to the 12PM3 class with frequency discriminator detection and different IF and BB filters. >