Analysis and Implementation of the Long Loop PLL Method for Real-Time Measurement of E_bIN₀ Ratio

Abstract

This article published earlier in [1] provides the mathematical analysis of the method along with the derivation of the mathematical model of the long-loop PLL and nonlinear equations used for the on-line estimation of the E_b/ N₀ ratios. Design considerations and practical implementation of the method in a multi-mission remote sensing satellite ground station along with various unpublished and practically measured test results have also been included.

Indexing terms:

• E_b/N₀ BPSK
• QPSK; UQPSK
• Carrier recovery
• Long loop PLL

Additional information

Notes on contributors

P K Jain

P K Jain obtained BE degree in Electronics and Instrumentation from Bhopal University in 1988, M Tech degree in Digital Systems & Computer Electronics from JNTU, Hyderabad in 1993 and PhD in Electronics and Communication Engineering from Osmania University, Hyderabad in 2005.

He joined National Remote Sensing Agency (Department of Space), Hyderabad in 1989 and worked for the development of remote sensing satellite receive earth station communication equipments like PSK modulators, demodulators and bit-synchronizers, PLL beacon tracking receivers etc. As a Project Manager-RF System in SARPAD, SARS and MMRSGS projects, he has contributed for the commissioning of RF receive-chain of various remote sensing satellite ground stations. He joined Space Applications Centre (ISRO), Ahmedabad in 2002 and has worked for the establishment of C-, Ext. C-, Ku- and Ka-band SATCOM earth stations in the capacity of the Project Manager-System Engineering of Bopal Earth Station (BES) and GAP-4 projects. He is currently working in ISRO Headquarters, Bangalore and has the responsibility of coordination, supervision and monitoring of various projects of Department of Space. He has published several papers in various journals & magazines of national and international repute.

S Pal

Surendra Pal an alumnus of BITS, Pilani and IISc, Bangalore is presently Deputy Director, Digital and Communication Area, ISRO Satellite Centre, Bangalore. He joined Indian Space Research Organization (ISRO), after a brief tenure at TIFR and was responsible for starting antenna and microwave activities in the ISRO satellite centre at the inception. He has been responsible for the development and fabrication of all spacecraft related telecommunication systems for India's satellites starting with Aryabhata to present day IRS and INSAT series of spacecraft. He had been consultant to: (i) INMARSAT/ICO (UK) for LEOSAT definitions, responsible for the development of satellite hand held telephone antenna system for ICO (UK) and (ii) ITU for defining regional African satellite communication system. He was also chairman of information infrastructure working group of ministry of information technology (2000–2001).

V M Pandharipande

V M Pandharipande obtained BE from Nagpur University (VRCE) in 1970, MTech and PhD in Electronics & Communication Engineering from IIT, Kharagpur in 1972 and 1979 respectively. During 1972–1974 worked as Secientific Officer in Tata Institute of Fundamental Research, Mumbai. Joined as Faculty member in Radar and Communication Centre of IIT Kharagpur in 1974 and served till 1983 as Asistant Professor. During his stay at IIT, worked on sponsored research projects funded by DRDO, Ministry of Defence, Department of Electronics, and Space Applications Centre in the field of phased array antennas, slotted waveguide couplers, slotted array antennas, strip microstrip antennas and feed systems.

He joined Department of Electronics & Communication Engineering, Osmania University, Hyderabad in 1983 as a Professor and was responsible for establishment of research and training facilities in Microwave Engineering. He organized several short term courses and workshops for scientists and engineers working in institutes, R&D institutions in the field of microwave circuits, antennas and radar systems. He successfully completed sponsored projects funded by Ministry of HRD, AICTE, CSIR, Department of Science and Technology, LRDE, ISRO. He has published more than 80 research papers in national and international journals/conference proceedings and guided 6 PhD students.

He served as Head of the Department during 1985–1987, 1989–1990, Chairman, Board of Studies during 1987–1990, 1996–1999, Director, Curriculum Development & Accreditation Audit Cell during 1996–1999, Dean, faculty of Engineering during 1999–2001. He was Coordinator of World Bank aided project IMPACT during 1991–1996 and was the resource person for preparing initial project document for Swiss Development Cooperation project called “NETWORK” during July 2003-Jan 2004. He served as the Director of Visvesvaraya National Institute of Technology, Nagpur.

He received Best Teacher Award from Govt of AP in 2002, Best Teacher Award of Faculty of Engineering, OU in 2003, Bharat Ratna Sir Visvesvaraya Award of Institute of Engineers and Government of AP in 2003, Prof K Srinivasan Memorial Award of JETE in 2003. He is the Fellow of JETE, ISTE and AP Academy of Sciences. He has served as member of National Radar Council, National Board of Accreditation, Expert Member for AICTE, DRDO, Ministry of Defence. He has to his credit 12 books in Marathi literature.