Noise-immunity processing of digital multilevel pulse-amplitude modulation signals
DOI:
https://doi.org/10.20535/RADAP.2015.63.64-75Keywords:
multi-level modulation, SNR, PSD, power spectrum density, BER, bit error rate, noise compensator, phase locked loop, PLLAbstract
Introduction. The main properties and features of spectral-effective multi-level pulse amplitude modulation digital signals at coherent reception are presented. It is shown that the phase locked loop circuit (PLL) circuit used in the receiver is able to work at SNR > 5 dB.
Object of the paper. We propose a new scheme of noise compensator at an intermediate frequency, allowing us to obtain increasing of SNR on 15–25 dB when error of PLL is equal zero. The noise compensator has the gain 8–18 dB at error of PLL = 33° that is able to work at SNR = 5 dB. As result, we can obtain a required SNR for determined BER in systems with multi-level PAM.
Conclusions. This technical solution makes a spectrally-efficient system using multi-level amplitude modulation is also energy efficient, forward-looking and competitive. The power transmitters of cell phones and radio relay lines of mobile communication systems can be reduced by 10 times or at the same transmitter power improvement the quality of communication or range is presented.
References
Перечень ссылок
Галкин В. А. Цифровая мобильная радиосвязь / В. А. Галкин. – М. : Горячая линия–Телеком, 2007. – 432 с. – ISBN 5-93517-252-6.
Rashdan M. Differential-Time and Pulse-Amplitude Modulation Signaling for Serial Link Transceivers / Mostafa Rashdan, James W. Haslett // Multiple-Valued Logic : Proc. of IEEE 44th Int. Symp. ISMVL, 19–21 May 2014, Bremen. – 2014. – pp. 248–253. – DOI : http://dx.doi.org/10.1109/ISMVL.2014.51.
Маковеева М. М. Системы связи с подвижными объектами / М. М. Маковеева, Ю. С. Шинаков. – М. : Радио и связь, 2002. – 440 с. – ISBN 5-256-01562-1.
Anttonen A. Energy Detection of Multilevel PAM Signals with Systematic Threshold Mismatch / Antti Anttonen, Adrian Kotelba, Aarne Mämmelä // Journal of Electrical and Computer Engineering. – 2009. – ID : 457342. – DOI : http://dx.doi.org/10.1155/2009/457342.
Чуркин Е. И. Следящие фазовые системы и помехоустойчивость радиосвязи / Е. И. Чуркин. – Саратов : Изд-во Сарат. ун-та, 1983. – 239 с.
Шахгильдян В. В. Системы фазовой автоподстройки частоты ; 2-е изд. доп. / В. В. Шахгильдян, А. А. Ляховкин. – М. : Связь, 1972.
Гоноровский И. С. Радиотехнические цепи и сигналы : 3-е изд. перераб. и доп. / И. С. Гоноровский. – М. : Сов. радио, 1977. – 608 с.
Пат. України № 71118. Чутливий підсилювач з малим рівнем шумів / О. С. Макаренко. – Опубл. 10.07.2012.
Латхи Б. П. Системы передачи информации / Б. П. Латхи ; пер. с англ. Б. И. Кувшинова. – М. : Связь, 1971. – 324 с.
Скляр Б. Цифровая связь. Теоретические основы и практическое применение / Б. Скляр ; пер. с англ. – М. : Вильямс, 2003. – 1104 с. – ISBN 5-8459-0497-8.
References
Galkin V. A. (2007) Tsifrovaya mobil'naya radiosvyaz' [Digital mobile radiocommunication]. Moskow, Goryachaya liniya–Telekom, 432 p.
Rashdan M. and Haslett J. W. (2014) Differential-Time and Pulse-Amplitude Modulation Signaling for Serial Link Transceivers. Multiple-Valued Logic (ISMVL), 2014 IEEE 44th International Symposium on, pp. 248–253. DOI: 10.1109/ISMVL.2014.51.
Makoveeva M. M. and Shinakov Yu. S. (2002) Sistemy svyazi s podvizhnymi ob"ektami [System for Mobile Communications]. Moskow, Radio i svyaz', 440 p.
Antti Anttonen, Adrian Kotelba and Aarne Mämmelä. (2009) Energy Detection of Multilevel PAM Signals with Systematic Threshold Mismatch. Research Letters in Communications, Vol. 2009, Article ID 457342, 4 p. DOI: 10.1155/2009/457342.
Churkin E. I. (1983) Sledyashchie fazovye sistemy i pomekhoustoichivost' radiosvyazi [Continious phase system and noise immunity of radio communication]. Saratov, Izdatelstvo Saratovskogo universiteta, 239 p.
Shakhgil'dyan V. V. and Lyakhovkin A. A. (1972) Sistemy fazovoi avtopodstroiki chastoty [A phase-locked loop], Moskov, Svyaz' Publ.
Gonorovskii I. S. (1977) Radiotekhnicheskie tsepi i signaly [Radio Circuits and Signals]. Moskov, Sov. radio Publ., 608 p.
Makarenko A. S. (2012) Sensitive amplifier with low noise level. Patent UA, no. 71118.
Lathi B. P. (1968) Communication Systems. John Wiley & Sons Inc.
Sklar B. (2001) Digital Communications: Fundamentals and Applications, 2nd ed. New Jersey: Prentice-Hall.
Downloads
Published
How to Cite
Issue
Section
License
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
