Results 31 to 40 of about 631,150 (90)

Improved Serrodyne Spur Suppression via Time Division Multiplexing

, 2006
We have improved the overall spur free dynamic range of a serrodyne shifted signal via time division multiplexing. We have realized a tunable RF signal at 98.5 MHz with 42 dB overall SFDR.
Sangyoun Gee, Delfyett, Peter J., Franklyn Quinlan, Peter Delfyett, Sarper Ozharar, Ozharar, Sarper, Gee, Sangyoun, Quinlan, Franklyn   +7 more
core   +1 more source

Single-modulator, direct frequency comb spectroscopy via serrodyne modulation. [PDF]

Opt Lett, 2023
Long DA, Bresler SM, Bao Y, Reschovsky BJ, Hodges JT, Lawall JR, LeBrun TW, Gorman JJ.   +7 more
europepmc   +1 more source

Spectral characterisation of shortened pulse position modulation format [PDF]

, 2010
Shortened pulse position modulation (SPPM) is a new modulation format that has recently been proposed for underwater wireless optical communications. A full spectral characterisation of SPPM is considered and original expressions are presented, which ...
Cryan, R.A.
core   +1 more source

Serrodyne optical frequency shifting for heterodyne self-mixing in a distributed-feedback fiber laser

, 2008
International audienceWe describe an all-fiberized coherent detection system at 1.55 μm using heterodyne self-mixing modulation in a distributed-feedback fiber laser.
Gilles, Hervé, Laroche, Mathieu, Bartolacci, Célia, Lesueur, Guillaume, Girard, Sylvain   +4 more
core  

Optimum Mode-Switching Assisted Adaptive Modulation

, 2001
Adaptive modulation techniques combat fading by employing a suitable modulation mode depending on the instantaneous channel conditions for improving the Bit Error Rate (BER) performance or the average through-put.
Choi, B.J., Hanzo, L.
core   +1 more source

Improving Broadcast Channel Rate Using Hierarchical Modulation [PDF]

, 2012
We investigate the design of a broadcast system where the aim is to maximise the throughput. This task is usually challenging due to the channel variability.
Méric, Hugo, Lacan, Jérôme, Lesthievent, Guy, Arnal, Fabrice, Boucheret, Marie-Laure   +4 more
core  

Generalised pre-coding aided spatial modulation [PDF]

, 2013
A new Multiple Input Multiple Output (MIMO) transmission scheme termed as Generalised Pre-coding aided Spatial Modulation (GPSM) is proposed, where the key idea is that a particular subset of receive antennas is activated and the activation pattern ...
Yang, Lie-Liang, Zhang, Rong, Hanzo, Lajos   +2 more
core   +1 more source

Efficient frequency synthesis using subsampling and serrodyne techniques

, 2022
Phase-locked loops (PLLs) are commonly used as clock generators for sub-systems within integrated circuits at the cost of significant power, area, and complexity. This thesis presents an attempt at simplifying the integration of multiple clock generators
Sharkia, Ahmad
core  

Pulse position modulation coding schemes for optical intersatellite links [PDF]

, 2007
The rapid and significant development of communications links between satellites has made it possible to use various applications such as relay voice, video, multimedia, etc.
Ghosna, Fadi, Sibley, Martin J.N.
core   +2 more sources

Transmitter Preprocessing Aided Spatial Modulation for Multiple-Input Multiple-Output Systems

, 2011
This paper proposes and studies a transmitter preprocessing aided spatial modulation (PSM) scheme, which conveys information jointly by a conventional amplitude-phase modulation (APM) and a preprocessing aided space shift keying (pre-SSK) modulation.
Yang, Lie-Liang
core   +2 more sources