| |
AVQ1030 - ActiveCore™ On-channel Repeater/Gap-Filler
Introduction
One of the major obstacles in today's broadcasting is the presence of echoes resulting from two processes:
* Main signal multi-path propagation;
* Energy leakage from the output of a repeater to its input, or so-called feedback interference.
Avateq's AVQ1030 On-channel repeater (Gap-filler) is a robust adaptive echo and feedback interference cancellation platform that can be used as a stand alone unit or integrated into client's transmitting system. High performance adaptive engine of the on-channel repeater effectively detects and removes both echoes at the repeater’s input, providing a“clean” signal at the repeater’s output. In the context where broadcasters are more and more concerned about reducing their network OPEX costs and, at the same time, limiting impact on the environment, it becomes important to increase the broadcasting coverage area without installing additional expensive high-power digital transmitters in the "shadowed" areas.
The unit is targeted to building high performance interference cancellation systems (ICS) for digital broadcasting industry.
Features:
- High performance adaptive echo and feedback canceller with improved MER capabilities;
- Uses proprietary signal processing for the main signal restoration;
- Multi-path echo removal;
- Integrated adaptive non-linear and linear digital pre-distorter (DPD) with PAR reduction;
- Integrated signal envelope tracking capabilities for HPA transistor drain control;
- Adjustable echo cancelling window position;
- Signal quality (MER, SNR) monitoring capabilities;
- Supports all major digital broadcasting video and audio standards - DRM+, RAVIS, ISDBT, ATSC, DAB, DTMB, CMMB, DVB-T/H, DVB-T2, etc.;
- Can be adapted to proprietary modulation schemes used in, for example, hybrid "satellite-terrestrial" digital broadcasting;
- Integrated monitoring receiver functionality.
Technical Specification:
| Main signal input RF in: |
-50..0dBm; 470..862 MHz (standard) |
| Feedback signal input RF fbd (input is used if adaptive DPD functionality is required): |
-50..0dBm; 470..862 MHz (standard) |
| Main output RFout |
-50..0dBm; 470..862MHz (standard) |
| Envelop tracking output: |
user defined shaping with multi-dimensional gain and phase correction; |
| Processing delay: |
10 µsec with an additional shaping filter “On”; |
| Feedback interference level (Gain Margin): |
up to 20dB (max) above the main signal |
| Feedback interference and echo cancellation: |
>= 40dB |
| Signal MER after Echo and Feedback interference removed: |
>= 35 dB (subject to input level MER) |
| MER degradation with DPD and feedback canceller "Off": |
1dB@45dB MER at the unit input |
| Interfaces: |
|
| a) hardware: |
Ethernet, USB, CAN, PCIe, RS232 |
| b) software: |
WEB GUI, host based GUI (PC GUI), SNMP, simplified machine-to-machine protocol |
| Power supply: |
5A@12V DC (OEM module)
110-250V, 50/60Hz AC (1U unit) |
| Operating temperature range: |
0..50, °C |
Applications:
- SFN compliant on-channel repeater/gap filler with extended functionality;
- Central processing core for interference cancellation systems;
- Broadcasting signal and channel estimator.
Monitoring Capabilities:
- Transmitted signal quality:
* Spectrum Quality (shoulder level)
* Central Frequency
* Signal Bandwidth
* MER
- Broadcasting standard physical layer parameters:
* Constellation
* Symbol and Guard Interval Duration
* Standard Specifics
- General transmitter operating functionality.
Application Block-Diagram:
Ordering Information:
- AVQ1030-OEM - ActiveCore On-channel Repeater/Gap-Filler (OEM module)
- AVQ1030-PCI - ActiveCore On-channel Repeater/Gap-Filler (standard PCIe card)
|
|
|
|
|
|
|
