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

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)

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

12 Performance comparison between single antenna and dual antenna DVB-H reception.

Better

Worse

13 Dual antenna reception gives approx. 4 dB performance gain compared to single antenna.

Dual antenna, MRC Single antenna

~4 dB gain

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

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.