參數(shù)資料
型號(hào): MSM7730
廠商: OKI ELECTRIC INDUSTRY CO LTD
元件分類: 微控制器/微處理器
英文描述: 1 CHANNEL(S), 2M bps, LOCAL AREA NETWORK CONTROLLER, PQFP144
封裝: 20 X 20 MM, 0.50 PITCH, PLASTIC, LQFP-144
文件頁(yè)數(shù): 20/20頁(yè)
文件大?。?/td> 179K
代理商: MSM7730
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7
Oki Semiconductor
Digital on/off ramping from 0 to 24 s of the modulator output power may be added under register con-
trol
Modulator radio requirements are:
6-bit DAC, clock at 32 MHz (offset binary, 2’s complement)
Anti-alias filtering to extract the 24-MHz alias
(24-MHz IF will be -10 dB on 8-MHz fundamental from DAC output)
Gaussian filtering to translate CP-FSK into G-FSK, in accordance with the IEEE 802.11 specification
(SAW filter at 240 MHz, if recommended)
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:
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
PHY
RADIO
Input
Processing
State Machine
Figure 5. Demodulator Block Diagram
Slicer
Decode
Σ
Pream
UW
Decimating
DLPF
Aperture
Corrector
Detect
Trans
Detect
Dev
Detect
Carrier
Control
Timing
Control
Data
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