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Multi-antenna DVB-H receiver Andy Dewilde, IMEC MADUF, March 20, 2007
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Research focus
Study on impact of a multi-antenna DVB-H receiver on reception performance and battery power consumption
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Outline
DVB-H system overview
System modelling for simulation
Results
Conclusions
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DVB-H conceptual system overview
Power saving
Robustness
Mobility/network trade-off
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DVB-H conceptual system overview (2)
Research focus
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6 A system model of DVB-H PHY layer has been developed in the Matlab simulation environment
System simulation model (Matlab) includes 1. DVB-H transmitter 2. MIMO wireless channel 3. Dual antenna DVB-H receiver
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MIMO channel specifications
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MIMO channel specifications
Single input (Tx), multiple output (Rx1 & Rx2)
Typical Urban 6 (TU6) channel Antenna correlation factor: 0.5 (~ 12..15 cm separation)
Time variant behavior (mobility simulation)
20 km/h 120 km/h Channel response
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DVB-H receiver specifications
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DVB-H receiver specifications
Dual stream input Channel estimation and Equalizer adapted for Maximum Ratio
Combining (MRC)
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11 Maximum Ratio Combining uses a weighted combination of antenna 1 and antenna 2 signals
High attenuation Small signal High noise impact High data uncertainty Assign low weight
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12 Performance comparison between single antenna and dual antenna DVB-H reception.
Better
Worse
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13 Dual antenna reception gives approx. 4 dB performance gain compared to single antenna.
Dual antenna, MRC Single antenna
~4 dB gain
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14 At 120 km/h, there is a 1.5 dB performance loss compared to a static channel.
Static 120 km/h
~1.5 dB loss
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15 About 7 to 10% battery power penalty when using dual antenna reception on typical DVB-H handheld
For dual antenna MRC receiver 2x Front End (FE) 1.5x Baseband (BB)
⇓
Approx. 7% increase in power consumption.
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Conclusions
Standard compliant DVB-H model has been developed
Dual antenna DVB-H reception has been simulated
With a typical channel, approx. 4 dB gain is achieved in receiver performance (before MPE-FEC)…
… and gives an increase of about 7% in battery power consumption on general DVB-H handheld.