User`s guide

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15 W-CDMA Uplink Digital Modulation
for Receiver Test
This chapter teaches you how to build fully coded W-CDMA uplink modulated signals for
testing base station receiver designs and provides information on how the W-CDMA uplink
format is implemented within the ESG. The modulation is generated by the signal generator’s
internal baseband generator. There are two channel modes for transmitting an uplink signal,
PRACH and DPCH. This chapter covers both channel modes and includes the following
sections:
• “Equipment Setup” on page 348
• “Understanding the PRACH” on page 350
• “Generating a Single PRACH Signal” on page 363
• “Multiple PRACH Overview” on page 375
• “Setting Up a Multiple PRACH Signal” on page 380
• “Overload Testing with Multiple PRACHs—Multiple ESGs” on page 398
• “DPCH” on page 405
• “Configuring the UE Setup” on page 423
• “Locating Rear Panel Input Signal Connectors” on page 424
• “Configuring Rear Panel Output Signals” on page 426
• “Adjusting Code Domain Power” on page 429
• “W-CDMA Uplink Concepts” on page 431
• “DPCCH/DPDCH Frame Structure” on page 458