Generalized concatenated CPFSK modulation

Hautle, A.; Bossert, Martin; Shavgulidze, Sergo; Ugrelidze, Nodar

doi:10.1109/itw.1998.706455

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…The NMR detection scheme is a crucial part of the setup and deserves special consideration. An analysis of several possibilities is described in a separate publication [21]. Apart from its special role in the measurement, NMR can also be used to monitor the polarisation state of the spin systems at any stage of the experiment.…”

Section: Some Practical Commentsmentioning

confidence: 99%

The spin-dependent nd scattering length—a proposed high-accuracy measurement

Brandt

Glättli

Grießhammer

et al. 2004

Nuclear Instruments and Methods in Physics Research Section A:

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The understanding of few-nucleon systems at low energies is essential, e.g. for accurate predictions of element abundances in big-bang and stellar fusion. Novel effective field theories, taking only nucleons, or nucleons and pions as explicit degrees of freedom, provide a systematic approach, permitting an estimate of theoretical uncertainties. Basic constants parameterising the short range physics are derived from only a handful of experimental values. The doublet neutron scattering length a2 of the deuteron is particularly sensitive to a three-nucleon contact interaction, but experimentally known with only 6 % accuracy. It can be deduced from the two experimentally accessible parameters of the nd scattering length. We plan to measure the poorly known "incoherent" nd scattering length a i,d with 10 −3 accuracy, using a Ramsey apparatus for pseudomagnetic precession with a cold polarised neutron beam at PSI. A polarised target containing both deuterons and protons will permit a measurement relative to the incoherent np scattering length, which is know experimentally with an accuracy of 2.4 × 10 −4 .

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Section: Some Practical Commentsmentioning

confidence: 99%

The spin-dependent nd scattering length—a proposed high-accuracy measurement

Brandt

Glättli

Grießhammer

et al. 2004

Nuclear Instruments and Methods in Physics Research Section A:

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show abstract

“…Similar to the block code case, the ideas of generalized concatenation can be directly applied to modulation with memory, such as continuous phase modulation (CPM) [22], [23] and [24]. We focus our attention to the special case of CPM, namely to continuous-phase frequency-shift keying (CPFSK).…”

Section: Generalized Concatenation Of Mod-ulation W I T H Memorymentioning

confidence: 99%

An Introduction to Generalized Concatenated Codes

Zyablov

Shavgulidze

Bossert

1999

Trans Emerging Tel Tech

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Abstract. This paper presents an introduction to the theory of generalized concatenated codes. We consider the encoding and decoding procedures of both ordinary concatenatedcodes, and generalized concatenatedcodes where block codes are used as inner codes. We give the main parameters of these codes, and by means of examples, show that under the same conditions the latter outperforms the former with respect to minimum code distance. We also heuristically describe the generalized concatenated decoding procedure. Then we show how the generalized concatenated coding ideas can be applied to encoded memoryless modulation. Such construction is often referred to as a multilevel code in literature. We consider the multilevel codes from the standpoint of generalized concatenated codes and with the help of a simple example, show how encoding and decoding procedures can be camed out. Ordinary concatenated and generalized concatenated coding schemes are considered next, using inner convolutional codes or inner modulation with memory. With the help of examples, we analyze the distance properties of such constructions.

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Multilevel coded CPFSK systems for AWGN and fading channels

Altunbaş

Aygölü

2000

IEEE Trans. Commun.

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Generalized concatenated CPFSK modulation

Cited by 3 publications

References 8 publications

The spin-dependent nd scattering length—a proposed high-accuracy measurement

The spin-dependent nd scattering length—a proposed high-accuracy measurement

An Introduction to Generalized Concatenated Codes

Multilevel coded CPFSK systems for AWGN and fading channels

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