| Intel 多种功能采用Thomson调谐器的DVB-T解决方案 |
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| 作者：Intel 来源：21IC中国电子网 点击数：140 更新时间：2008-3-18 |
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Product Overview
The Intel® CE 9523 TNIM reference design is a complete two-stage diversity-enabled DVB-T digital
terrestrial receiver. It cascades two Intel® CE 6354 NorDig Unifi ed DVB-T COFDM demodulators to
signifi cantly improve the front-end carrier-to-noise performance compared to single-channel designs.
The reference design enables true portable TV using small low-gain portable TV aerials. Two Thomson* DTT 73000 series mini-tuners* are used, providing a compact layout for space-constrained designs, without compromising performance.
This reference design is specifi cally designed for digital terrestrial network interface modules (TNIMs) or “on-motherboard” set top box/iDTV implementation. It allows customers to quickly and cost-effectively evaluate and implement DVB-T diversity-enhanced TV performance. Software is supported directly by Intel and each reference design is accompanied by comprehensive documentation and test results.
Intel® CE 9523 DVB-T Reference Design with Thomson* Mini-tuner
The Intel® CE 9523 DVB-T front-end reference design addresses the needs of the portable digital TV market segment. The two Intel® CE 6354 DVB-T COFDM demodulators are cascaded together. This builds on the performance of the single-channel NorDig Unifi ed Intel® CE 6353/5 demodulators by offering signifi cant carrier-to-noise improvement.
This performance enhancement enables the use of small antennas in portable TV applications.
Received digital terrestrial signals are down-converted via each Thomson tuner to the “on-board” Intel
CE 6354 DVB-T COFDM demodulators for channel coding to MPEG transport stream output. One Intel
CE 6354 COFDM demodulator is designated as the primary demodulator and the other Intel CE 6354
COFDM is the secondary demodulator. Each Intel CE 6354 COFDM demodulator contains a diversity
processor functional block between the channel coding and the forward error correction sections of the chip. In the case of the secondary Intel CE 6354 COFDM demodulator, this block outputs the transport stream to the processor of the primary demodulator for diversity performance enhancement.
The Intel CE 9523 DVB-T TNIM reference design kit is supplied with an Intel® CE 9594 interface board,
which only requires a single +5 V supply, all other power rails are generated on board. The Intel CE 9523
DVB-T reference design front-end solution is optimized for real in-fi eld terrestrial environmental conditions.
For further information on the Thomson DTT 73000 series tuner+/IF please contact tuners@thomson.net
下面是应用`板的外形图和性能总结:
Intel® CE 9523 DVB-T TNIM Reference Design
*Diversity-enabled DVB-T and NorDig Unifi ed
performance
*Excellent blind-channel scan times
– UHF 2 K only—9 digital with 5 analog channels
present—less than 12 seconds
– UHF 2 K/8 K—9 digital with 5 analog channels
present—less than 18 seconds
*On-chip automatic:
– Lost signal re-acquisition (no external
programming required)
– Co-channel and adjacent-channel
interference suppression
– Impulse noise protection
*Excellent single-frequency network support
*Single SAW bandwidth for 6/7/8 MHz
channel operation
*Low power consumption (<2.4 W)
*Hardware and software power-down mode
for PC cards
*Compact 2-layer FR4 PCB, single-sided
component application board reference design
*Includes serial bus to PC adapter, via Intel
CE 9594 interface card
*Support material available:
– Schematics and layout artwork
– Intel® CE 6354 DVB-T COFDM data sheet
and design manual
– Hardware user manuals
– Full software package
– Performance test results
Customer Support
*The Intel CE 9523 DVB-T TNIM reference design is available to qualified customers.
Intel’s First DVB-T COFDM Diversity-Enabled Terrestrial Demodulator
Product Overview
The Intel® CE 6354 DVB-T diversity demodulator builds on the high-performance standards set by
Intel’s CE 6355 NorDig Unifi ed 1.0.2 component by incorporating a maximum ratio combining (MRC)
processor that enables up to four Intel CE 6354 demodulators to be cascaded together. This feature
signifi cantly improves the signal-handling performance of the solution compared to single demodulator
designs, to facilitate portable “anywhere” TV reception.
The Intel CE 6354 diversity demodulator includes a high-performance 10-bit A/D converter capable
of accepting direct IF integrated digital filtering and requires only a single 8 MHz channel SAW filter for
6, 7 and 8 MHz COFDM signal reception, plus a 7-bit ADC for RF level indication. An advanced hard-wired
on-chip state machine controls all acquisition and tracking operations, minimizing software overhead and resulting in fast auto-scan and auto-signal re-acquisition. The Intel CE 6354 diversity demodulator also features excellent single-frequency network SFN performance, unique auto active-impulse noise filtering and very low power consumption, including software/hardware power-down mode.
Terrestrial Receiver Application Intel supports the Intel CE 6354 DVB-T diversity demodulator with a two-device reference design that lets you quickly evaluate the improved performance offered by diversity over single demodulator operation.
Each board includes complete documentation and test results, with software supported directly by Intel. Our DVB-T reference designs offer excellent signal-handling performance at very low power consumption.
The Intel CE 6354 DVB-T diversity demodulator has a unique on-chip dedicated tuner drive engine, ideal for the control of MOPLL-based RF tuner designs. This significantly reduces the tuner control software overhead and results in very fast frequency channel-scan performance. For the non- MOPLL-based tuner, the Intel CE 6354 demodulator incorporates a 2-wire bus “bypass mode” that enables direct unrestricted programming.
The Intel CE 6354 DVB-T diversity demodulator accepts the classic TV IF frequencies of 36/44 MHz and low-IF down to 4.57 MHz. It provides tuner IF AGC control, and RF AGC read using a 7-bit ADC for calculated RF signal-strength indication. The Intel CE 6354 DVB-T demodulator’s integrated digital filter reduces the bill of materials by eliminating the need for multi-bandwidth SAW IF channel filters. It provides 6, 7 and 8 MHz operation using a single 8 MHz SAW filter. Driven by high-level commands and featuring full automation, the Intel CE 6354 DVB-T demodulator can be directly interfaced in parallel or serial modes to all standard MPEG-2 processing chips.
下面是地面电视接收器应用方框图.
Intel® CE 6354 DVB-T Demodulator
*Diversity-enabled DVB-T demodulator using maximum ratio combining
*Performance compliant standards
– ETSI ETS 300 744 DVB-T
– NorDig Unifi ed 1.0.2
*Very fast blind-channel scan times
– UHF 2K only—9 digital with 5 analog channels present—less than 10 sec.
– UHF 2K/8K only—9 digital with 5 analog channels present—less than 18 sec.
*On-chip automatic functions
– Lost signal re-acquisition with no external programming
– Co-channel and adjacent-channel interference suppression
– Active impulse noise rejection
*Low power consumption
– Less than 320 mW normal operation
– Less than 280 mW low power operation
– Eco-friendly standby and sleep modes
*Excellent single-frequency network SFN performance
Easy to Program
*State machine architecture simplifies software implementation and minimizes host processor intervention
*Simple high-level command-driven software
*Vast array of on-chip information available to the user
*Fully automated blind-acquisition capability with automatic mode-detect Simplified Design
*Integrated digital IF filtering reduces cost with single SAW filter operation
*RF signal-level indicator
*Dedicated 2-wire bus interface for efficient tuner control
*Clock generation from single low-cost 20.48 MHz crystal or external 4 or 27 MHz clock
*IF sampling from 4.57 to 36.17 MHz and at 43.5 MHz
*Direct interface to MPEG decoder chips
*Operational temperature range –40 to +85°C
*7x7 mm 64-pin QPF package
下图是CE6354外形图.
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