Khan17 2017-09-23 12:42:02
Description: a coherent optical receiver for demodulating optical quadrature phase-shift keying (QPSK) signals. ... Third, this scheme is applicable to multilevel modulation formats such as M-array PSK and quadrature amplitude modulation (QAM). First contribution tackles the complexity of the direct detection noncoherent receiver for differentially encoded quadrature phase shift keying.
Plat: matlab | Size: 546KB | Downloads: 8
schemws 2017-05-04 18:47:17
Description: Take parallel direct detection of the threshold value is the most common area of the segmentation method, is very good
Plat: matlab | Size: 19KB | Downloads: 1
song86 2015-03-04 14:20:29
Description: Direct sequence spread spectrum (DSSS) communication systems has been widely used in these years for its advantage of wide spectrum, low working Signal-to-Noise ratio (SNR), anti-interference, anti-multipath effect and capability of LPI and LPD. They are increasingly replacing conventional communication forms and obtaining extensively applications in modern military and commercial communication systems, for example, CDMA communication system, GPS , measuring and control system, satellite chain, identification of friend or foe and etc. Therefore, corresponding DSSS electronic counter technique becomes a big problem to solve in electronic warfare domain. DSSS electronic counter technique including blind detection, blind parameter estimation and spreading sequences estimation. For the issue of DSSS electronic counter technique of DSSS/QPSK signal damaged by strong additive white Gaussian noise (AWGN), the main research content in this dissertation as follow.
Plat: matlab | Size: 2013KB | Downloads: 19
u20140801 2014-08-21 21:12:52
Description: This scheme is also called DPSK since MZ modulator provides the “digital” phase modulation if it is biased at null instead of quadrature. No coherent detection is needed if data is differentially pre-coded.
Plat: Visual C++ | Size: 243KB | Downloads: 2
cidily 2013-08-03 23:21:41
Description: VPI-based co-simulation with matlab for the direct detection ofdm system
Plat: matlab | Size: 7825KB | Downloads: 183
moly 2012-07-12 21:25:34
Description: M-ary pulse position modulation on and off keying atmospheric effects in the direct detection of optical wireless communication systems, compare the difference of the ook PPM modulation mode.
Plat: matlab | Size: 688KB | Downloads: 74
muhammad 2011-07-12 22:49:16
Description: Alamouti-Type Space-Time Coding for Free-Space Optical Communication with Direct Detection
Plat: PDF | Size: 93KB | Downloads: 6
thava 2010-08-24 20:28:44
Description: OOK modulation for Radio-over-fibre system. Intensity modulation direct detection
Plat: matlab | Size: 1KB | Downloads: 19
帅小伙 2010-05-04 19:06:54
Description: matlab higher order spectra (including dual spectrum), including high-end spectrum of the direct method and indirect method for signal detection time difference estimates.
Plat: matlab | Size: 1KB | Downloads: 318