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Telematics data transmit vehicular information like engine performance, fuel consumption, braking performance, etc.; GPS data continuously relays location; RFID tags are used to track shipments at intermediate hubs and customer data collected at different interfaces.
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Figure 5 Experimental testbed setup for WCDMA uplink power control using the Qualcomm 3G emulator HSE 2. We evaluate the GOP level CADF power control algorithm both with and without heuristics on a high-gain, high-noise environment with all users transmitting using vehicular antennae.
Then, a second script ("H.264 encoding adapter script" in Figure 1) processes the data array with the objective of generating the data stream file to be transmitted to the vehicular emulator.
Precisely, a near-zero Rician K is present in the new MIMO 2×2 channel model, what leads to observe worse performance results than when transmitting over the other vehicular models.
In this first set of experiments we have evaluated the performance of transmitting the videos over the vehicular channel RTV-Urban Canyon Oncoming.
We have carried out several simulation experiments oriented to the evaluation of the performance obtained when videos coded with H.264/AVC are transmitted using our IEEE 802.11p vehicular testbed described in Section 3. The evaluation has been performed considering 10 frames of typical videos in QCIF format (176×144 pixels) [35]: Claire, Coastguard, Foreman, and News.
In a vehicular environment, both the transmit and receive antennas are amounted at heights of 1 3 meters [3].
In the numerical examples, we consider a vehicular communication system with 2 transmit and 2 receive antennas.
In this section, we present a testbed that is able to transmit and receive H.264/AVC content in different vehicular scenarios.
It was developed a testbed that is able to transmit and receive H.264/AVC coded videos over different vehicular empirical scenarios.
The control channel (CCH) is used to transmit the control or safety message in the vehicular network, such as BSM information.
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