| Publisher | Tropian | ||
|---|---|---|---|
| Format | PDF, requires Acrobat Rdr 5 | Date added | 14 Aug 2003 |
| Topics | Diagnostics and Analysis, Migration Tools | ||
| Downloads | 7 | ||
GSM's new EDGE modulation promises to increase data rates by up to 3x and is also viewed as a migration path from existing IS-136 systems to 3G systems. The 8 3 / p -shifted 8-PSK modulation scheme is summarized and some potential simplifications are presented. Various practical impairments found in IQ modulators are inflicted upon the EDGE signal, and their effects on the spectrum and error-vector magnitude are characterized. Where possible, computer simulations are corroborated by results from Rohde & Scharz SMIQ & FSEA signal generators and analyzers. Several sets of practically achievable impairments and their corresponding spec compliance (or non-compliance) are identified.
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