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BPSK-DSSS-CDMA-FFT 四个基本系统的代码

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<tbody><tr><td class="headercell" width="70%" height="20">&nbsp;Frequency Hopping Spread Spectrum, Direct Sequence Spread Spectrum and CDMA&nbsp;
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            <td valign="top" width="89"><b>Author:</b></td>
            <td colspan="2"><a href="http://www.mathworks.com/matlabcentral/fileexchange/loadAuthor.do?objectType=author&amp;objectId=1094128">Kashif&nbsp;Shahzad</a></td>
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            <td valign="top" width="89" height="15"><b>Summary:</b></td>
            <td colspan="2" height="15">A very simplified method for elaboration of Frequency hopping techniques.</td>
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            <td valign="top" width="125" height="15"><b>MATLAB Release:</b></td>
            <td colspan="2" valign="bottom" height="15">R13</td>
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            <td valign="top" width="135"><b>Description:</b></td>
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These programmes are not heavily commented but infact are very simple
and intutive to understand the Frequency hopping and related tasks. I
have made two files for frequency hopping, one of them is not showing 6
proper impulsive peaks but other programme is infact showing them, In
DSSS i have generated 20 bits and each bit is 6 units long and then it
is XORed with another pseudorandom data bits and then it is BPSK
modulated and hence two peaks in its FFT are displayed. CDMA programme
is infact self descriptive <br>
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            <td valign="top" width="25%"><b>File Id:</b></td>
            <td width="20%">5428</td>
            <td valign="top" width="25%"><b>Average rating:</b></td>
            <td width="29%">3.76</td>
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            <td valign="top">&nbsp;</td>
            <td valign="top"><b>Size:</b></td>
            <td>2 KB</td>
            <td valign="top"><b># of reviews:</b></td>
            <td>29</td>
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            <td valign="top">&nbsp;</td>
            <td valign="top"><b>Submitted:</b></td>
            <td>2004-07-07</td>
            <td valign="top"><b>Downloads:</b></td>
            <td>8818</td>
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            <td valign="top"><b>Subscribers:</b></td>
            <td>4</td>
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            <td>&nbsp;</td>
            <td valign="top"><b>Keywords:</b></td>
            <td colspan="3" valign="top">FHSS, DSSS, CDMA</td>
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              <td>&nbsp;</td>
              <td valign="top"><b>Other Requirements:</b></td>
              <td colspan="3" valign="top">no requirements</td>
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                <td valign="top"><b>Zip file contents:</b></td>
                <td colspan="3" valign="top">dsss.m,  fhss.m,  freq_hopp_sprd_spctrm.m,  cdma_codec.m</td>
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    <!--Acknowledgements -->
    
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