msm7730 Oki Semiconductor, msm7730 Datasheet - Page 9

• Manufacturer Part Number: msm7730
• Description: Wireless Lan Baseband Controller
• Manufacturer: Oki Semiconductor

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Digital on/off ramping from 0 to 24 µs of the modulator output power may be added under register con-
trol
Modulator radio requirements are:
Demodulator
The baseband controller in the MSM7730 incorporates a digital baseband demodulator designed to
demodulate IEEE 802.11 GFSK data packets with 1- and 2-Mbps headers. The demodulator contains the
following features:
• 6-bit DAC, clock at 32 MHz (offset binary, 2’s complement)
• Anti-alias filtering to extract the 24-MHz alias
• Gaussian filtering to translate CP-FSK into G-FSK, in accordance with the IEEE 802.11 specification
• 1- and 2-Mbps operation
• Two-antenna diversity control
• Analog discriminator interface
• Flexible clear channel assessment (CCA) options to enhance interference performance
• Tunable or adaptive digital filter and data slicers for performance optimization
• Clock and carrier tracking for demodulation of long data packets
RADIO
(24-MHz IF will be -10 dB on 8-MHz fundamental from DAC output)
(SAW filter at 240 MHz, if recommended)
Processing
Input
Decimating
DLPF
Figure 5. Demodulator Block Diagram
Carrier
Control
Timing
Control
State Machine
Aperture
Corrector
Detect
Dev
Slicer
Oki Semiconductor
Pream
Detect
Detect
Decode
UW
Trans
Detect
Data
MSM7730
PHY
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