GC5316_14 Datasheet, PDF (61/76 Pages) Texas Instruments – HIGH-DENSITY DIGITAL DOWNCONVERTER AND UPCONVERTER

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GC5316
SLWS154A − JANUARY 2004 − REVISED MARCH 2004
5.1.9 DUC Channel Controls
These controls are used by the DUC channels. These follow the duc <channel_number> keyword in the cmd5316
configuration file.
VARIABLE NAME
symmetric_pfir
TYPE
PAGE
ADDRESS
LSB
POSITION
C 0100
00
14
symmetric_cfir
C 0100
00
13
pmeter_integration_duc D 0100
02
0
pmeter_sync_delay_duc D 0100
03
9
pmeter_interval_duc
D 0100
03
0
pilot_gain_0
D 0100
04
0
pilot_gain_1
D 0100
05
0
pilot_psc_lsb
D 0100
06
0
pilot_psc_msb
D 0100
07
14
pilot_diversity
D 0100
07
13
pilot_delay
D 0100
08
0
BIT
WIDTH
DEFAULT
1
0
1
0
13
0
7
0
9
0
16
0
16
0
16
1
2
0
1
0
16
0
DESCRIPTION
When asserted the block’s PFIR is
symmetric. DUC only
When asserted the block’s CFIR is
symmetric. DUC only
This is the number of four sample sets to
accumulate for a power measurement. In
CDMA mode, one sample set is the I and Q of
the signal and diversity. Ia and Qa (signal) are
each squared and accumulated and Ib and
Qb (diversity) are squared and accumulated.
In UMTS mode, each I and Q pair are
squared and accumulated. Four samples are
equal to one integration count. The count is
initiated when the sync is asserted or when
the interval start time is reached. When the
integration count is reached, the accumulated
powers are made available for MPU access
and an interrupt is generated.
The delay from selected sync source to when
the power calculation starts.
The start interval timer is the interval over
which the integration is restarted and must be
greater than the integration count. The interval
start counter and RMS power accumulation is
started at the sync pulse after the
programmed delay and every time the interval
counter reaches its limit. This value is in 64
sample units.
Pilot channel gain word, aligned with MSB of
the input data. 0xFFFF generates a full scale
complex pilot signal added to the user signal.
Setting the gain to 0x0000 causes no pilot
signal to be added. Only valid for UMTS,
should be set to 0x0000 for CDMA.
This value MUST be set to the same value as
pilot_gain_0.
The lower 16 bits of the 18-bit pilot X LFSR
initial value. This 18b word is loaded on pilot
sync event. The value loaded here that
corresponds to 3gpp primary scrambling code
(PSC) 0 is 0x00001. Users must calculate the
correct initial value to implement the other 511
PSCs.
The upper 2 bits of the 18-bit pilot X LFSR
initial value. This 18b word is loaded on pilot
sync events. The value loaded here that
corresponds to 3gpp primary scrambling code
(PSC) 0 is 0x00001. Users must calculate the
correct initial value to implement the other 511
PSCs.
Select between main and diversity pilot
symbol generation. (0=main, 1=diversity)
Unsigned delay value in chips from the pilot
sync event, from 0 to 38399 chips.
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