Adaptive modulation-coding for Q-band satellite channel model

In this paper, one of the most common fade mitigation techniques (FMT) Adaptive Coding and Modulation (ACM), which has some advantageous properties like bandwidth efficiency, availability, low error rate, power consumption efficiency, is investigated. For the same channel structure, Fixed Coding and Modulation is also used and its band efficiency, availability, total error quantity and frame error rate are compared against ACM. For protecting the channel dynamism and reality the channel, which is created by received signal at Q-band is used. Channel model, transmitter-receiver system structure is generated at MATLAB. For creating the channel structure Markov-Chain is used. For transmission modulations, code rate and frame structure given in DVB-S2 are used. While applying ACM technique both modulation and code rate are adapted. For FCM, modulation kept stabile and code rate is adapted. When ACM and FCM are compared, band efficiencies are calculated as 4.02b/s/Hz and 3.89b/s/Hz; availabilities are calculated as 99.34% and 94.1%, respectively. The band efficiency and availability of FCM is about 3% and 5.5% less than ACM, respectively.