A Design of SDR-based Pseudo-Analog Wireless Video Transmission System
This work addresses the need for accessible and flexible hardware platforms for researchers in wireless video transmission, though it appears incremental as it builds on existing pseudo-analog concepts with a new implementation.
The authors tackled the problem of verifying pseudo-analog wireless video transmission algorithms by designing an SDR-based transceiver that is transparent and allows full access to implementation details, and they proved that the analog method can achieve optimal performance comparable to digital methods from a rate-distortion perspective.
The pseudo-analog wireless video transmission technology can improve the effectiveness, reliability, and robustness of the conventional digital system in video broadcast scenarios. Although some prototypes of IEEE 802.11 series have been developed for researchers to do simulations and experiments, they are usually expensive and provide very limited access to the physical layer. More importantly, these prototypes cannot be used to verify the correctness of the new proposed pseudo-analog wireless video transmission algorithms directly due to limited modulation modes they can support. In this paper, we present a novel design of software radio platform (SDR)-based pseudo-analog wireless video transceiver which is completely transparent and allows users to learn all the implementation details. Firstly, we prove that the analog method can also achieve the optimal performance as the digital method from the perspective of the rate-distortion theory. Then, we describe the two hardware implementation difficulties existed in the designing process including the data format modification and the non-linear distortion. Next, we introduce the implementation details of the designed transceiver. Finally, we analyze the performance of the designed transceiver. Specifically, the results show that the designed system can work effectively in both simulations and experiments.