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Routine mar1psd: To compute the power spectum by AR-model parameters.
Input parameters:
ip : AR model order (integer)
ep : white noise variance of model input (real)
ts : Sample interval in seconds (real)
a : Complex array of AR parameters a(0) to a(ip)
Output parameters:
psdr : Real array of power spectral density values
psdi : Real work array
in chapter 12
This a software runing on the matlab, it is used in the channel coding simulation.
It include DVB-S2 LDPC, Covolution turbo, and block turbo code, You can choose which channel coding to run.
it run the encoder and add white noise in the channel, then it run the decoder, and compute the error rate.
VESA Display Device Data Block (DDDB) Standard
Display Device Data Block
This proposal defines the Display Device Data Block (DDDB), for use in a CEA-861-compatible EDID
extension, as originally proposed in the VESA TV Compatibility white Paper (Compatibility of PC and
CE Displays, Aug.1, 2005).
Local Lucene
====================
Provide geographical based searching to lucene in an efficent mannor
Contents
* Compiling from Source
* Using local lucene
Author: Patrick O Leary
email: pjaol@pjaol.com
A white paper on local lucenes usage is available
http://www.nsshutdown.com/projects/lucene/whitepaper/locallucene.htm
thinkinjava2English
Thinking in Java,
2nd Edition, Release 11
To be published by Prentice-Hall mid-June, 2000
Bruce Eckel, President,
MindView, Inc.
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This model simulates a six-degrees-of-freedom variable mass equations of motion with Simulink and Aerospace Blockset. This
model has been color coded to aid in locating Aerospace Blockset blocks. The red blocks are Aerospace Blockset blocks, the orange blocks are subsystems containing additional Aerospace Blockset blocks and the white blocks are Simulink blocks.
Abstract-The effect of the companding process on QAM signals
has been under investigation for the past several years. The
compander, included in the PCM telephone network to improve
voice performance, has an unusual affect on digital QAM data
signals which are transmitted over the same channel. The quantization
noise, generated by the companding process which is multiplicative
(and asymmetric), degrades the detectability performance
of the outermost points of the QAM constellation more
than that of the inner points.
The combined effect of the companding noise and the inherent
white gaussian noise of the system, leads us to a re-examination of
signal constellation design.
In this paper we investigate the detectability performance of a
number of candidates for signal constellations including, a typical
rectangular QAM constellation, the same constellation with the
addition of a smear-desmear operation, and two new improved
QAM constellation designs with two-dimensional warpi
ofdm信道特性
Channel transmission simulator
Channel transmission simulator
％
％ inputs:
％ sig2 - noise variance
％ Mt - number of Tx antennas
％ Mr - number of Rx antennas
％ x - vector of complex input symbols (for MIMO, this is a matrix, where each column
％ is the value of the antenna outputs at a single time instance)
％ H - frequency selective channel - represented in block-Toeplitz form for MIMO transmission
％ N - number of symbols transmitted in OFDM frame
％
％ outputs:
％ y - vector of channel outputs (matrix for MIMO again, just like x matrix)
％ create noise vector sequence (each row is a different antenna, each column is a
％ different time index) note: noise is spatially and temporally white
