Adnan Ahmed Khan, Sajid Bashir, Syed Ismail Shah

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IEEE --- 2005 International Conference on Emerging Technologies
September 17-18, Islamabad
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'N' REFERENCE USER > 'N' ASYNCRONOUS USER SPREADING GAIN =127
PN SEQUENCE LENGTH = 1023 CHIPS
PN OFFSET = 255
VARIATION IN PN CROSS CORRELATION
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PN SEQUENCE LENGTH = 32767 CHIPS
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PN SEQUENCE LENGTH = 1048575 CHIPS
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CORRELATION VALUE
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CORRELATION OF FIRST 64-CHIPS OVER ENTIRE LENGTH OF PN SEQ
SHORT PN SEQUENCE
MAX USERS = 511
OFFSET = 64
SPREADING GAIN = 64
MAX CROSS CORR = 36
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Variation in Cross Correlation
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RELAVITIVE DELAY BETWEEN TRANSMISSIONS (MEASURED IN Tc)
Figure 4. Variation of Cross Correlation when Nref>Nasync
'N' Reference User < 'N' Interfering User SPREADIN GAIN = 127
PN SEQUENCE LENGTH = 1023 CHIPS
PN OFFSET = 255
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PN SEQUENCE LENGTH = 32767 CHIPS
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PN SEQUENCE LENGTH = 1048575 CHIPS
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Overlap of Spreading in Chip Duration(Tc)
Figure 5. Variation of cross correlation when Nref