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AN OVERVIEW OF TRANSCEIVER STRUCTURES FOR ADVANCED WIRELESS PERSONAL COMMUNICATION SYSTEMS ( PCS )
Mathiopoulos, P. Takis 대한전자공학회 1996 APCCAS:Asia Pacific Conference on Circuits And Sys Vol.1 No.1
This plenary lecture presents an overview of the various transceiver (transmitter/receiver) structures designed for advanced wireless personal communication systems (PCS). We first review the status of the different - past, current, and future wireless PCS and present a brief description of the fading channels applicable to such systems. We then classify: i) the various transmitter structures in terms of their modulation schemes, ii) their associate receiver structures in terms of the most important and generic techniques employed to mitigate the effects of the fading distortion. In doing so, we also review the most important qualities, advantages and disadvantages of these generic transceiver structures.
Comments on “Bitwise Log-Likelihood Ratios for Quadrature Amplitude Modulations”
Papaharalabos, Stylianos,Mathiopoulos, P. Takis,Martina, Maurizio,Masera, Guido IEEE 2015 IEEE communications letters Vol.19 No.11
<P>With reference to a recently published letter, the purpose of our contribution is two-fold. Firstly, to point out that, what is referred to as a new approximation function MinC (see Eqs. (5)-(8) of Park, 2015) has been previously published (see Eq. (12) of Papaharalabos et al., 2009). Secondly, we present additional related published works of ours, which have further investigated the subject of bitwise log-likelihood ratio (LLR) simplification in soft-output decoding, but have not been mentioned in Park, 2015.</P>
Capacity Performance Analysis of M-ary PPM TH-UWB Systems in the Presence of Narrowband Interference
Kokkalis, Nikos V.,Mathiopoulos, P. Takis,Karagiannidis, George K.,Koukourlis, Christos S. The Korea Institute of Information and Commucation 2008 Journal of communications and networks Vol.10 No.3
The capacity of ultra-wideband (UWB) systems in presence of narrowband interference (NBI) is studied. By appropriately modifying the Shannon capacity formula, an analytical expression for the capacity of M-ary pulse position modulation (PPM) signals in the presence of NBI is obtained. Performance evaluation results for the capacity of such signals as a function of the NBI carrier frequency and power are also presented.
Capacity Performance Analysis of M-ary PPM TH-UWB Systems in the Presence of Narrowband Interference
Nikos V. Kokkalis,P. Takis Mathiopoulos,George K. Karagiannidis,Christos S. Koukourlis 한국통신학회 2008 Journal of communications and networks Vol.10 No.3
The capacity of ultra-wideband (UWB) systems in presence of narrowband interference (NBI) is studied. By appropriately modifying the Shannon capacity formula, an analytical expression for the capacity ofM-ary pulse position modulation (PPM) signals in the presence of NBI is obtained. Performance evaluation results for the capacity of such signals as a function of the NBI carrier frequency and power are also presented.
Dual Diversity over Correlated Ricean Fading Channels
Bithas Petros S.,Sagias Nikos C.,Mathiopoulos P. Takis The Korea Institute of Information and Commucation 2007 Journal of communications and networks Vol.9 No.1
The performance of dual diversity receivers operating over correlated Ricean fading channels is analyzed. Using a previously derived rapidly converging infinite series representation for the bivariate Ricean probability density function, analytical expressions for the statistics of dual-branch selection combining, maximal-ratio combining, and equal-gain combining output signal-to-noise ratio (SNR) are derived. These expressions are employed to obtain novel analytical formulae for the average output SNR, amount of fading, average bit error probability, and outage probability. The proposed mathematical analysis is used to study various novel performance evaluation results with parameters of interest the fading severity, average input SNRs, and the correlation coefficient. The series convergence rate is also examined verifying the fast convergence of the analytical expressions. The accuracy of most of the theoretical performance evaluation results are validated by means of computer simulations.