Performance of SC Receiver over Generalized K Fading Channel in the Presence of Imperfect Reference Signal Recovery

Abstract

B. Nikolic, G. Dordevic, D. Milic, N. Milosevic. Performance of SC Receiver over Generalized K Fading Channel in the Presence of Imperfect Reference Signal Recovery // Electronics and Electrical Engineering. -Kaunas: Technologija, 2011. -No. 9(115). -P. 41-46.This paper considers a partially coherent detection of quadrature phase-shift keying (QPSK) signals in a composite generalized K (K G ) fading channel. At the reception the selection combining is applied, while the branches of the combiner are not identically distributed. The extraction of the reference carrier from non-modulated pilot signal is performed in a phase-locked loop (PLL) circuit. The difference between received signal phase and extracted reference signal phase is a stochastic variable with Tikhonov probability density function. The influence of the fading parameters, the standard deviation of phase error and the number of diversity branches on the system performance is examined. The bit-error rate is used as a measure of the reception quality. Ill. 6, bibl. 17 (in English; abstracts in English and Lithuanian). B. Nikolic, G. Dordevic, D. Milic, N. Miloševic. SC imtuvo našumo tyrimas atsižvelgiant į apibendrinantįjį K slopinimą kanale // Elektronika ir elektrotechnika. -Kaunas: Technologija, 2011. -Nr. 9(115). -P. 41-46.Nagrinėjama dalinė koherentinė signalo, moduliuoto kvadratūrine fazine manipuliacija, detekcija atsižvelgiant į apibendrinantįjį K (K G ) slopinimą kanale. Priėmus signalą analizuojamas nešantysis signalas. Nemoduliuoto signalo šaltinis atskiriamas fazinėje kilpoje. Stochastinis kintamasis su Tikhonovo tikimybės tankio funkcija yra pagrindinis skirtumas tarp demoduliuoto signalo ir atskirto signalo šaltinio. Ištirta slopinimo parametrų, standartinio nuokrypio fazinė klaidos įtaka. Il. 6, bibl. 17 (anglų kalba; santraukos anglų ir lietuvių k.).

Analysis and Application of FLL based on the Processing of the Input and Output Periods

“…Note that, according to (13), it is possible to avoid the simultaneous measurement of T I k and T O k . Instead of that, only one continues measurement of time i.e.…”

“…Nevertheless they are closely related to FLL described in this article because of the similarity of some hardware parts used in their realizations. The articles [6][7][8][9][10][11][12][13][14] represent in the field of FLL and PLL the wider base of literature. The books [15][16][17][18][19] are used for electronics implementation and as mathematical and theoretical base in the development and analyses.…”

Performance Analysis of Amplify-and-Forward Relay System in Hoyt Fading Channels with Interference at Relay

“…Diversity at the receiver is a well-known promising avenue for improving mean signal strength and reducing signal level fluctuations in fading channels. Performance improvement using diversity reception is considered in [1,2,5,6,[13][14][15]. The effect of cooperative diversity on the system performance is analyzed in [3,4] and [16].…”

“…Fig.1, Fig.2and Fig.3show results from(14), with assumption q 1 =q 2 =q INF =q. The strength of the interference is studied using signal-to-interference ratio (SIR)INF    / 1 .…”