參數(shù)資料
型號(hào)： PCF5083
廠商： NXP Semiconductors N.V.
英文描述： STEEL COVER
中文描述： GSM信號(hào)處理IC
文件頁數(shù)： 97/136頁
文件大?。?/td> 602K
代理商： PCF5083
1996 Oct 29
97
Philips Semiconductors
Objective specification
GSM signal processing IC
PCF5083
9.4.4.5
Initialization messages for Handover mode
Table 75 shows how a handover from TCH/FS to another TCH/FS has to be processed. ‘fn
H
’ is the first frame transmitted
on the new TCH/FS in Handover mode (handover access burst transmitted in uplink). ‘fn
S
’ is the first frame processed
in normal mode on the new TCH/FS (normal burst in up link).
Table 75
Initialization procedures for handover mode
Notes
1.
2.
Procedures to be started via EXEC_PROC in TDMA frame FN (TCH/FS normal mode).
t1
s
= FN
s
divided by 26
×
51;
t2
s
= FN
s
modulo 26;
t3
s
= FN
s
modulo 51.
The parameter nb determines the number of normal bursts to be written into the modulator output FIFO in the
initialization frame. It depends on the frame number of the 1st processed frame in accordance with Table 71.
3.
fn
PROCEDURES
(1)
N
W
‘...’
RX
TX
MX
.
procedure calls for TCH/FS in normal mode; the correct value for N
W
must be
looked-up in Table 70.
.
procedure calls for TCH/FS in normal mode; the correct value for N
W
must be
looked-up in Table 70.
CP_start_TCHFS (enc_flag, dec_flag, t1
s
, t2
s
, t3
s
, kc[4], nb); notes 2 and 3
MP_exec_reset (MOD_OUT_FIFO);
DB_write_register(11, 0x0100, 1); set IO1 = 1
procedure calls for TCH/FS in handover mode; the correct value for N
W
must
be looked-up in Table 70.
procedure calls for TCH/FS in handover mode; the correct value for N
W
must
be looked-up in Table 70.
procedure calls for TCH/FS in handover mode; the correct value for N
W
must
be looked-up in Table 70.
procedure calls for TCH/FS in handover mode
BB_normal_burst (SCRATCH_BUFF,SCRATCH_BUFF, tsc,
nb)MP_write_normal_bursts (SCRATCH_BUFF, nb); note 3
procedure calls for TCH/FS in normal mode; the correct value for N
W
must be
looked-up in Table 70.
procedure calls for TCH/FS in normal mode; the correct value for N
W
must be
looked-up in Table 70.
149
156
80
.
.
.
.
.
.
‘...’
149
156
80
.
fn
H
2
0
21
149
0
156
0
80
0
fn
H
1
‘...’
0
0
0
fn
H
‘...’
149
156
80
.
‘...’
149
156
80
fn
s
2
29
149
156
80
fn
s
1
‘...’
149
156
80
fn
s
‘...’
149
156
80
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