Blind carrier recovery for circular QAM using nonlinear least-squares estimation

Duryea, Timothy; Sari, Ilkay; Serpedin, Erchin

doi:10.1016/j.dsp.2006.03.001

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…To overcome the problem, strategies relying on partitioning [25] and optimal nonlinear transformations [26,27] are applied. However, problems arise for multi-level constellations, since no promising way is available for stripping off the modulation from the symbols x n .…”

Section: Carrier Frequency/phase Estimationmentioning

confidence: 99%

Personal Satellite Services

Giambene¹,

Sacchi²

2011

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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PrefaceSatellite systems have an important role in providing information services and Internet access everywhere. Next-generation satellite services will cater to the demands of personal services by bringing satellite terminals directly to the hands of the user, thus making them really 'personal.' Particularly future-proof services via satellite will be broadband Internet access, e-health, transportation and environment monitoring, provision of innovative services in underdeveloped areas, and 3D TV broadcasting.With the unique broadcast nature and ubiquitous coverage of satellite networks, the synergy between satellite and terrestrial networks provides immense opportunities for disseminating multimedia services to a wide range of audiences over large numbers of geographically-dispersed people. It is evident that the satellite will play a complementary, but essential, role in delivering multimedia and telecommunication services to infrastructure-less regions where the terrestrial high-bandwidth communication infrastructures are practically unreachable.New R&D frontiers appear to be the development of terabits per seconds satellite networks, MIMO antenna techniques, relaying and cooperation and the adoption of cognitive radio.The PSATS 2011 conference (February 17-18, 2011, Malaga, Spain) represented a very interesting opportunity to meet and discuss these future challenges, thus promoting the exchange of ideas.PSATS 2011 brought together academic participants (mainly from Europe and Korea) and industries (e.g., Avanti Group, Astrium, ESA, Telespazio, Thales, and TriaGnoSys) interested in future techniques on satellite communications, networking, systems, and applications.This year keynote talks were provided by Paul Febvre (INMARSAT) dealing with "Personal Satellite Access Terminals: Observations with a 40-Year Perspective" and by Haitham Cruickshank (University of Surrey, UK) on "Satellite Communications Security-Current Status and Future Expectations."In addition to this, three special sessions were organized on current hot topics: (a) "Multiservice IP Next-Generation Satellite Networks" dealing with the DVB-RCS NG standardization work by Thales Alenia Space -Spain; (b) "Aeronautical Communications for Air Traffic Management" by the University of Bradford; (c) "Delay Tolerant Networking (DTN)" by the ESA SatNEx III project (www.satnex3.org). In particular, the recent standardization work on the DVB Interactive Satellite System specification was addressed by the first special session. Moreover, Aeronautical Communications for Air Traffic Management (ATM) were addressed in a two-part special session dealing with the Iris Program funded by the European Space Agency and the SANDRA (Seamless Aeronautical Networking Through Integration of Data Links Radios and Antennas) EU FP7 project, respectively. Iris proposes a satellite-based solution VI Preface to support the evolution from "voice-based" communications to digital data links in continental and oceanic airspace. The following projects were presented within the Iri...

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Section: Carrier Frequency/phase Estimationmentioning

confidence: 99%

Personal Satellite Services

Giambene¹,

Sacchi²

2011

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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“…In [3] a nonlinear least mean square (LMS) phase and frequency estimator is used in feed-forward carrier recovery architecture. In [4] a modification in the constellation diagram of 128-QAM is utilized to reduce the phase error.…”

Section: Introductionmentioning

confidence: 99%

An adaptive algorithm for reducing phase error in digital carrier recovery for high-order QAM signals

Bornoosh

Nabavi

2010

IEICE Electron. Express

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This paper describes an adaptive software aided technique for phase error reduction in digital carrier recovery (CR) for high-order Quadrature Amplitude Modulation (QAM). Simulations and analytical results illustrate a phase error variance improvement of at least 30 dB compared to conventional CR, leading to more than 3 dB processing gain enhancement for high-order QAM, using the simple 4 th power phase estimation technique. The new technique can be employed to improve the performance of any CR loop, at the cost of slight complexity overhead independent of the modulation order.

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