4.4. Baseband Overview
4.4.1 Introduction
The Baseband circuits of the phone are required to perform the following functions:
• Equalisation
• Channel coding / decoding
• Speech coding / decoding
• Data Encryption
• Layer 1, 2 and 3 software tasks
• Man Machine interface (MMI)
• System Interface
• SIM Interface and Management
• Audio and Tone Generation
• Power supply and battery management
• RF power control
• Synchronisation
• Real time clock
Figure 4.5: Baseband Block Diagram
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