參數(shù)資料
型號(hào): MSM7583
廠商: OKI SEMICONDUCTOR CO., LTD.
英文描述: pie/4 Shift QPSK MODEM
中文描述: 餡餅/ 4移調(diào)制調(diào)制解調(diào)器
文件頁(yè)數(shù): 22/23頁(yè)
文件大小: 215K
代理商: MSM7583
MSM7583
Semiconductor
22/23
Demodulator Control Timing Diagram (Example)
Demodulator
unit Modulator
input data
PDN2
SLS2
240 bits 625
m
s
R1
G
Slot 1
R2
G
Slot 2
R3
G
Slot 3
R4
G
Slot 4
G
SLS1
"0"
"0"
"0"
"1"
"1"
"0"
"1"
"1"
AFC
R1
R2
RXD
R3
R4
RXC
Timing for CS
G
G
G
G
G
G
G
G
R
R
R
R
SS SS PR PR
-------------
UW
PR
-------------
CR
CR
G
G
G
G
G
G
G
G
RXD
AFC
RPR
RCW
56 bits
64 bits
G
G
G
G
G
G
G
G
R
R
R
R
SS SS PR PR
-----
UW
PR
-------------
CR
CR
G
G
G
G
G
G
G
G
RXD
8 bits
RPR
RCW
"0"
Loss than 30 bits
AFC
G: Guard bit
R: Ramp bit
SS: Start symbol bit
PR: Preamble bit
UW: Unique word bit
CR: CRC bit
(1) Control channel/synchronous burst (SS + PR = 64 bits)
(2) Communication channel (SS + PR = 8 bits)
* AFC and RCW may be controlled at the same timing.
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