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| 型号： | SQC6100 |
| 厂商： | INFINEON TECHNOLOGIES AG |
| 英文描述： | TERRESTRIAL RECEIVER FOR DVB - T |
| 中文描述： | 地面接收器用于DVB -笔 |
| 文件页数： | 2/2页 |
| 文件大小： | 86K |
| 代理商： | SQC6100 |
Published by
Infineon Technologies AG i. Gr.
How to reach us:
http://www.infineon.com
Infineon Technologies AG i. Gr. 1999.
All Rights Reserved.
Please note that any information contained in this
publication may be subject to change. Infineon
Technologies reserves the right to make changes
to or to discontinue any product or service identi-
fied in this publication without notice.
Please contact our regional offices to receive the
latest version of the relevant information to verify,
before placing orders, that the information being
relied upon is current.
All brand or product names, hardware or software
names are trademarks of their respective compa-
nies or organizations.
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Processing Internals of the Single-Chip Terrestrial Receiver SQC 6100
A second intermediate frequency of 7.225 MHz typical is fed into the SQC
6100 Single-Chip Terrestrial Receiver. Unwanted spectral components are
suppressed by the internal anti-alias filter. The AGC ensures optimal use of
the analog-to-digital converter. The I/O conversion mixes the signal to the
baseband. A resampling unit fits the baseband signal to the sampling rate of
the FFT. Coarse estimation for positioning the guard interval is provided to
align the FFT window. Pilot carriers are used to fine tune the FFT. The TPS
unit retrieves the parameters for demodulation. Channel estimation is used
to interpolate in time and frequency dimensions. The interference detection
unit uses scattered pilots in parallel to detect co-channel interference such as
caused by analog TV. This unit corrects the data carriers and produces 4-bit
wide soft bits. Symbol and bit de-interleaver feeds the datastream into the
FEC. The datastream is accessible via transport stream output in serial and
parallel modes.
The entirely digital clock and timing concept are based on a free running os-
cillator. The status of the SQC 6100 can be monitored via the I
2C-bus. Four
general purpose I/O’s are provided, including two pulse density modulators.
Availability
The SQC 6100 device is available with complete documentation.
Please contact your local Infineon Technologies office for further details.
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An antenna receives the digital terrestrial signal. The tuner selects, filters,
and mixes the carrier (program) down to a first IF of 36.125 MHz typical. Ad-
jacent channels are suppressed by SAW-filters. A second mixer shifts the
spectrum to the second IF. The SQC6100 provides analog filtering and digital
processing of the channel information. Output is the transport stream.
2nd IF
Input
TS
Output
Carrier/Sampling Frequency and Timing Synchronisation
Symbol/ Bit
De-
Interleaver
TPS
Channel Estimation
Interference Detection
4 GPIOs
incl. 2 PDMs
Re-
sampling
FFT
Clock, Reset
I2C
Equalizer
+ Soft Bit
Gen.
FEC
I / Q
conversion
ADC
AGC
AAF
)LJXUHHPI
SAW
Transport
Stream
Mixer
Tuner
Antenna
SQC6100
X6966
TUA 60xx
TDA 6190
Demodulator
Figure2.emf
1999-06-21
Printed in Germany
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