4 1. Department of Psychology, New York University, New York, 10003, U.S.A. 5 2. Center for Neural Science, New York University, New York, 10003, U.S.A. 6 3. Department of Biology, New York University, New York, 10003, U.S.A. 7 8 9 10 Running head: temporal modulation rate and spectral bandwidth 11 12 13 * Corresponding author: [email protected] 14 † Current address: UCL Ear Institute, Univer...

We propose the concept of nonreciprocal filtering power dividers, which are compact devices able to merge functionalities dividers and combiners, selectivity bandpass filters, magnetless nonreciprocity from time-modulation. A prototype this type operating at microwaves has been implemented in microstrip technology. The device is composed a Wilkinson divider integrated with two identical filters...

In digital communication, the bandwidth efficiency is one of the most important parameter to measure different modulation schemes, while the separation of waveforms in time domain of existing modulation schemes make it difficult to improve their bandwidth efficiency. Hence, in past decade researchers and engineers continuously try to find out the way to solve out this biggest problem in the fie...

This paper investigates adaptive bit-interleaved coded modulation (BICM) with different iterative decoding schemes for bandwidth efficient transmission. We assume knowledge of the average channel quality at the transmitter. For a fixed modulation scheme, the bandwidth efficiency can be adapted to the channel quality by changing the channel code rate and the iterative decoding procedure can be o...

Coding and modulation tradeoffs for limiterdiscriminator based CPM transceivers are examined in Rayleigh, fast fading environments. Comparisons are made on the basis of a fixed bandwidth to information rate ratio, so coded schemes and uncoded schemes can be compared fairly. It is shown that using the proper balance of modulation and coding is important to achieve good performance. It is found t...

Bandwidth efficient modulation schemes using Reed-Solomon (RS) codes are proposed for Hybrid In-Band-On-Channel (IBOC) systems that broadcast digital audio signals simultaneously with analog Amplitude Modulation (AM) programs in the AM band. Since both the power and bandwidth allocated for digital audio transmission are limited in this application, the system cannot afford to add enough redunda...

We have fabricated flip-chip-bondable vertical-cavity surface-emitting lasers (VCSELs) emitting at 894.6 nm wavelength for Cs-based atomic clock applications. For polarization control, we have integrated shallow semiconducting surface gratings in the top Bragg mirror. A modulation bandwidth of more than 5GHz is reached at only 0.5mA bias. Modulation current efficiency factors larger than 12GHz/...