Spectrum shaping with parity sequences

Applied Optics
D C Chu, J W Goodman

Abstract

For certain types of digitally generated holographic memories, it is important that the Fourier components to be stored have a constant, or nearly constant, modulus. It is shown that by interlacing two sequences of complex numbers, one a data sequence representing the information to be stored and the second a parity sequence, derivable from the data sequence, the discrete Fourier transform of the combined sequence can be made to have a constant modulus. A slight variation of the method leads to a spectrum with varying modulus but only a discrete set of phases. The sequences may be one-dimensional or multidimensional.

References

Oct 1, 1967·Applied Optics·A W Lohmann, D P Paris
Mar 1, 1971·Applied Optics·W J Dallas
Mar 1, 1971·Applied Optics·W J Dallas

❮ Previous
Next ❯

Citations

Aug 10, 1996·Applied Optics·T DreselJ Schwider
Aug 15, 1981·Applied Optics·A V Lugt
Jul 1, 2010·Optics Express·Seung-Whan BahkJonathan D Zuegel
Mar 8, 2008·Applied Optics·J A DavisI Moreno
Jan 1, 1975·Applied Optics·K Sato, T Shimizu
Nov 15, 1987·Applied Optics·J N Mait, K H Brenner
Dec 15, 1978·Applied Optics·C K Hsueh, A A Sawchuk
Jun 1, 1973·Applied Optics·W J Dallas
May 1, 1988·Applied Optics·J N Mait, K H Brenner
Feb 12, 2014·Optics Express·Mohammad MirhosseiniRobert W Boyd
Jul 10, 1996·Applied Optics·M BargeR Chevallier
Apr 1, 1978·Applied Optics·A W Lohmann, W T Rhodes
Dec 1, 1975·Applied Optics·J P Allebach, B Liu

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.