Selected Mapping (SLM) is known to be a useful method to reduce the peak to average power ratio (PAPR) of OFDM transmit signals. In this paper, the performance of PAPRreduction for Unique Word (UW-) OFDM is investigated where in contrast to usual cyclic prefix (CP-) OFDM correlations between subcarrier data exist due to a complex number Reed-Solomon code along the subcarriers. It is shown that ...

Among the growing number of Chinese companies that went public overseas, many have been detected and alleged as conducting financial fraud by market research firms or U.S. Securities and Exchange Commission (SEC). Then investors lost money and even confidence to all overseas-listed Chinese companies. Likewise, these companies suffered serious stock sank or were even delisted from the stock exch...

Double random phase encryption (DRPE) is one of the well-known optical encryption techniques, and many techniques with DRPE have been developed for information security. However, most of these techniques may not solve the fundamental security problem caused by using fixed phase masks for DRPE. Therefore, in this paper, we propose a key phase mask updating scheme for DRPE to improve its security...

Research on mass transfer in liquid membrane permeation has still left some challenging aspects to be solved. Although discussed very intensively the published models are rarely comparable and suffer from a lack of accuracy. The program was started with research on the widely investigated and very common test system Znaqu / Bis(2-ethylhexyl) phosphoric acid/ sulphuric acid. Based on the experim...

Optical systems such as signal processors, limiters, spatial light modulators, and optical computers require large and fast optical nonlinearities. Although free carrier-induced nonlinearities in semiconductors have the picosecond speeds required for use in many applications, they were considered too weak to be practical for optical systems applications. In our work, we have demonstrated that t...

Graphene has strong electro-optic effect which can be used to enhance the modulation efficiency of nanoscale photonic circuit. This paper describes recent developments for nearinfrared electro-optic modulator based on silicon-graphene hybrid structure. OCIS codes: (070.6120) Spatial light modulators; (070.5753) Resonators; (350.4238) Nanophotonics and photonic crystals

Spot size reduction is demonstrated by printing focused spots from amplitude-modulated radially polarized light at the wavelength λ = 405 nm on a photoresist. Amplitude modulation is realized by ring illumination and by application of an optimized amplitude distribution function. Amplitude modulation is implemented via spatial light modulator, which is followed by a specially designed radial wi...

The structured language model (SLM) of [1] was one of the first to successfully integrate syntactic structure into language models. We extend the SLM framework in two new directions. First, we propose a new syntactic hierarchical interpolation that improves over previous approaches. Second, we develop a general information-theoretic algorithm for pruning the underlying Jelinek-Mercer interpolat...

Selected mapping is well-known scheme for peak to average power ratio(PAPR) reduction in orthogonal frequency multiplexing(OFDM) systems. In this paper, we proposed a new scheme for generating a set of candidate transmission sequences. In conventional SLM, candidate sequences were generated by rotating the phases of the frequency domain OFDM M-ary symbols but in proposed scheme, candidate seque...