Error Correction with Systematic RLNC in Multi-Channel THz Communication Systems

The terahertz (THz) frequency band (0.3-lOTHz) has the advantage of large available bandwidth and is a candidate to satisfy the ever increasing mobile traffic in wireless communications. However, the THz channels are often absorbed by molecules in the atmosphere, which can decrease the signal quality resulting in high bit error rate of received data. In this paper, we study the usage of systematic random linear network coding (sRLNC) for error correction in generic THz systems with with 2N parallel channels, whereby N main high-bitrate channels are used in parallel with N auxiliary channels with lower bit rate. The idea behind this approach is to use low-bit rate channels to carry coding redundancy generated based on data sent over high-bit rate channels. The coding redundancy can be used at destination to compensate errors occurred during THz transmission. The presented analysis evaluates different settings of THz transmission system in term of the amount of coding redundancy, a code rate, required bit rate of auxiliary channels, the modulation format and transmission distance as required system configurations for a fault tolerant THz transmission.