_超宽带无线电基础.rar
_超宽带无线电基础.rar
代码片段和文件信息
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 886112 2009-01-07 10:03 _超宽带无线电基础Capacity of pulse-position modulation(PPM) on Gaussian and Webb channels.pdf
文件 2945 2004-03-06 01:47 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0101CP0101_BANDWIDTH.M
文件 1230 2004-03-06 01:45 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0101CP0101_GENRECT.M
文件 2967 2004-03-06 01:49 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0102CP0102_SINPULSE_ONE.M
文件 2973 2004-03-06 01:51 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0102CP0102_SINPULSE_TWO.M
文件 1841 2004-03-06 05:30 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0201CP0201_2PPM_TH.M
文件 410 2004-03-06 01:54 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0201CP0201_BITS.M
文件 643 2004-03-06 01:55 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0201CP0201_REPCODE.M
文件 364 2004-03-06 01:56 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0201CP0201_TH.M
文件 3847 2004-03-06 05:39 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0201CP0201_TRANSMITTER_2PPM_TH.M
文件 1411 2004-03-06 05:31 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0201CP0201_WAVEFORM.M
文件 1542 2004-03-06 05:45 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0202CP0202_2PAM_DS.M
文件 348 2004-03-06 05:41 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0202CP0202_DS.M
文件 3270 2004-03-06 05:47 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0202CP0202_TRANSMITTER_2PAM_DS.M
文件 3939 2004-03-06 05:51 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0203CP0203_OFDM_QPSK.M
文件 741 2004-03-06 05:49 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0203CP0203_QPSK_MOD.M
文件 1965 2004-03-06 04:43 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0301CP0301_PPM_SIN.M
文件 993 2004-03-06 04:44 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0301CP0301_PSD.M
文件 1703 2004-03-06 04:45 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0302CP0302_PPM_PERIODIC.M
文件 2113 2004-03-06 04:49 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0303CP0303_PPM_RANDOM.M
文件 1572 2004-03-06 04:52 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0402CP0402_2PAM_TH.M
文件 3652 2004-03-06 04:54 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0402CP0402_TRANSMITTER_2PAM_TH.M
文件 1007 2004-03-06 05:01 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0602CP0602_GAUSSIAN_PSD_NTH.M
文件 3175 2004-03-06 04:58 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0602CP0602_link_BUDGET.M
文件 1031 2004-03-06 05:00 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0602CP0602_MAX_DISTANCE.M
文件 1629 2004-03-06 04:56 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0602CP0602_SYMBOL_ERROR_PROBABILI.M
文件 2044 2004-03-06 05:02 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0602CP0602_THR_DB_VECTORS.M
文件 3530 2004-03-06 05:06 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0701CP0701_SHAPE_FACTOR_VARIATION.M
文件 3934 2004-03-06 05:09 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0702CP0702_ANALYTICAL_WAVEFORMS.M
文件 1997 2004-03-06 05:17 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0702CP0702_BANDWIDTH.M
............此处省略103个文件信息
%
% FUNCTION 1.2 : “cp0101_bandwidth“
%
% Evaluates the bandwidth of the input ‘signal‘ with sampling period
% ‘dt‘
% Bandwidth is evaluated according to the given ‘threshold‘ (in dB)
% ‘BW‘ is the bandwidth
% ‘f_high‘ is the higher limit
% ‘f_low‘ is the lower limit
%
% Programmed by Guerino Giancola
%
function [ss_Ef_highf_lowBW] = ...
cp0101_bandwidth(signaldtthreshold)
% ---------------------------------------------
% Step One - Evaluation of the single-sided ESD
% ---------------------------------------------
fs = 1 / dt; % sampling frequency
N = length(signal); % number of samples (i.e. size of the FFT)
T = N * dt; % time window
df = 1 / T; % fundamental frequency
X = fft(signal); % double-sided MATLAB amplitude spectrum
X = X/N; % conversion from MATLAB spectrum to fourier spectrum
ds_E = abs(X).^2/(df^2); % double-sided ESD
ss_E = 2.*ds_E(1:floor(N/2)); % single-sided ESD
% ------------------------------------------------
% Step Two - Evaluation of the frequency bandwidth
% ------------------------------------------------
[Epeakindex] = max(ss_E); % Epeak is the peak value of the ESD
f_peak = index * df; % peak frequency
Eth = Epeak*10^(threshold/10); % Eth is the value of the ESD
% corresponding to the given
% threshold
% iterative algorithm for evaluating high and low frequencies
imax = index;
E0h = ss_E(index);
while (E0h>Eth)&(imax<=(N/2))
imax = imax + 1;
E0h = ss_E(imax);
end % while E0h > Eth
f_high = (imax-1) * df; % high frequency
imin = index;
E0l = ss_E(index);
while (E0l>Eth)&(imin>1)&(index>1)
imin = imin - 1;
E0l = ss_E(imin);
end % while E0l > Eth
f_low = (min(indeximin)-1) * df; % low frequency
% end of iterative algorithm
BW = f_high - f_low; % signal frequency bandwidth
fprintf(‘
Frequency Bandwidth = %f [Hz]
High Frequency = %f [Hz]
Low Frequency = %f [Hz]
‘BWf_highf_low);
% -----------------------------
% Step Three - Graphical output
% -----------------------------
figure(2)
frequency=linspace(0fs/2length(ss_E));
PF=plot(frequencyss_E);
set(PF‘LineWidth‘[2]);
L1=line([f_high f_high][min(ss_E) max(ss_E)]);
set(L1‘Color‘[0 0 0]‘Linestyle‘‘:‘)
L1=line([f_low f_low][min(ss_E) max(ss_E)]);
set(L1‘Color‘[0 0 0]‘Linestyle‘‘:‘)
L1=line([f_low f_high][Eth Eth]);
set(L1‘LineWidth‘[2]‘Color‘‘red‘‘Linestyle‘‘:‘)
axis([0.8*f_low 1.2*f_high -0.1*Epeak 1.2*Epeak]);
AX = gca;
set(AX‘FontSize‘12);
T=title(‘Frequency domain‘);
set(T‘FontSize‘14);
X=xlabel(‘Frequency [Hz]‘);
set(X‘FontSize‘14);
Y=ylabel(‘Single-Sided ESD [V^2s/Hz]‘);
set(Y‘FontSize‘14);
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 886112 2009-01-07 10:03 _超宽带无线电基础Capacity of pulse-position modulation(PPM) on Gaussian and Webb channels.pdf
文件 2945 2004-03-06 01:47 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0101CP0101_BANDWIDTH.M
文件 1230 2004-03-06 01:45 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0101CP0101_GENRECT.M
文件 2967 2004-03-06 01:49 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0102CP0102_SINPULSE_ONE.M
文件 2973 2004-03-06 01:51 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0102CP0102_SINPULSE_TWO.M
文件 1841 2004-03-06 05:30 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0201CP0201_2PPM_TH.M
文件 410 2004-03-06 01:54 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0201CP0201_BITS.M
文件 643 2004-03-06 01:55 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0201CP0201_REPCODE.M
文件 364 2004-03-06 01:56 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0201CP0201_TH.M
文件 3847 2004-03-06 05:39 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0201CP0201_TRANSMITTER_2PPM_TH.M
文件 1411 2004-03-06 05:31 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0201CP0201_WAVEFORM.M
文件 1542 2004-03-06 05:45 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0202CP0202_2PAM_DS.M
文件 348 2004-03-06 05:41 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0202CP0202_DS.M
文件 3270 2004-03-06 05:47 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0202CP0202_TRANSMITTER_2PAM_DS.M
文件 3939 2004-03-06 05:51 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0203CP0203_OFDM_QPSK.M
文件 741 2004-03-06 05:49 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0203CP0203_QPSK_MOD.M
文件 1965 2004-03-06 04:43 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0301CP0301_PPM_SIN.M
文件 993 2004-03-06 04:44 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0301CP0301_PSD.M
文件 1703 2004-03-06 04:45 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0302CP0302_PPM_PERIODIC.M
文件 2113 2004-03-06 04:49 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0303CP0303_PPM_RANDOM.M
文件 1572 2004-03-06 04:52 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0402CP0402_2PAM_TH.M
文件 3652 2004-03-06 04:54 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0402CP0402_TRANSMITTER_2PAM_TH.M
文件 1007 2004-03-06 05:01 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0602CP0602_GAUSSIAN_PSD_NTH.M
文件 3175 2004-03-06 04:58 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0602CP0602_li
文件 1031 2004-03-06 05:00 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0602CP0602_MAX_DISTANCE.M
文件 1629 2004-03-06 04:56 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0602CP0602_SYMBOL_ERROR_PROBABILI.M
文件 2044 2004-03-06 05:02 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0602CP0602_THR_DB_VECTORS.M
文件 3530 2004-03-06 05:06 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0701CP0701_SHAPE_FACTOR_VARIATION.M
文件 3934 2004-03-06 05:09 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0702CP0702_ANALYTICAL_WAVEFORMS.M
文件 1997 2004-03-06 05:17 _超宽带无线电基础M文件超宽带无线电基础M文件CDROMCP0702CP0702_BANDWIDTH.M
............此处省略103个文件信息
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