This document summarizes research on the impact of using a dual-antenna receiver for DVB-H reception. It outlines that a system model was developed in Matlab to simulate a standard compliant DVB-H system with a dual antenna receiver using maximum ratio combining. The simulation found the dual antenna receiver provided approximately 4dB better reception performance than a single antenna receiver, though with a 7-10% increase in power consumption for the additional antenna circuitry. Mobility up to 120km/h resulted in a 1.5dB loss in performance compared to a static channel.

1. Multi-antenna DVB-H receiver
Andy Dewilde, IMEC
MADUF, March 20, 2007

2. 2
Research focus
Study on impact of a multi-antenna DVB-H receiver
 on reception performance and
 battery power consumption

3. 3
Outline
 DVB-H system overview
 System modelling for simulation
 Results
 Conclusions

4. 4
DVB-H conceptual system overview
Robustness
Power saving
Mobility/network trade-off

5. 5
DVB-H conceptual system overview (2)
Research focus

6. 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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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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Performance comparison between single antenna and
dual antenna DVB-H reception.
Worse
Better

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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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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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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.