The distributed space-time-frequency code in the environment of vehicular broadband communication
Ziqiang Chen · Journal of Circuits and Systems · 2011
In order to exploits the characteristic of multi-path and time varying of broadband communications channel between high-speed vehicular terminal and base station,a distributed space-time-frequency code scheme is proposed.In this scheme the distributed space-time-frequency code is implemented by a visual transmitter antennas arrays constructed from several idly terminals around the source node.So the scheme can acquire full inherent diversity gains including time diversity gain,frequency diversity gain,and cooperative diversity in channel without the information transmission rate loss.Theoretical analysis shows that time diversity gain increases as vehicle speed increasing,and the cooperative diversity gain is improved as the number of decodable relay nodes increasing.The simulation experiments validate theoretical analysis and indicate that the proposed scheme has better BER performance than distributed space-frequency code at higher SNR value.The simulation experiments also give the switch SNR between the two codes scheme(DSTFC and DSFC) in practice.