Adaptive communication for is one of the hottest areas of research in the telecommunication systems including wireless broadcast systems. This is primarily accomplished for sake of boosting the transmission throughput with enhanced quality of service and ideal link utilization. In adaptive communication, various radio transmission parameters like modulation symbol, code-rate and power etc. are carefully chosen according to the erratic channel state information on the link. Digital video broadcast—second generation (DVB-S2) has an inbuilt support for adaptive coding and modulation (ACM). However, power adaptation is still a necessity because of power constraint in downlink where satellite has a limited power bank. Moreover, different downlinks have distinct transmit power requirements due to diverse ambient on earth receivers like rainy, foggy, stormy and with clear sky etc., hence flat transmit power distribution among all the ground receivers may not be a good idea at all. To utilize the ACM feature in DVB-S2 and to additionally adapt power, in this paper, an adaptive modulation, coding (MODCOD) and power scheme is proposed. By investigating a fuzzy system and differential evolution algorithm, to select the set of MODCODs and optimum power vector, respectively, for the next transmission interval. From the simulation results it is apparent that the proposed scheme is promising in terms of efficient link and transmit power utilization as well as quality of service compared to the schemes in the literature with flat power distribution.

自适应通信是包括无线广播系统在内的电信系统中最热门的研究领域之一。这样做主要是为了通过提高服务质量和理想链路利用率来提高传输吞吐量。在自适应通信中，根据链路上不稳定的信道状态信息，精心选择各种无线传输参数，如调制符号，码率和功率等。第二代数字视频广播（DVB-S2）具有对自适应编码和调制（ACM）的内置支持。然而，由于卫星具有有限的功率库的下行链路中的功率限制，功率自适应仍然是必需的。而且，由于下雨天，大雾天，暴风雨和晴朗的天空等，因此所有地面接收器之间的平坦发射功率分配可能根本不是个好主意。为了利用DVB-S2中的ACM功能并额外地调整功率，本文提出了一种自适应调制，编码（MODCOD）和功率方案。通过研究模糊系统和差分进化算法，分别为下一个传输间隔选择一组MODCOD和最佳功率矢量。从仿真结果可以看出，与文献中具有平坦功率分布的方案相比，该方案在有效的链路和发射功率利用率以及服务质量方面很有希望。为了利用DVB-S2中的ACM功能并额外地调整功率，本文提出了一种自适应调制，编码（MODCOD）和功率方案。通过研究模糊系统和差分进化算法，分别为下一个传输间隔选择一组MODCOD和最佳功率矢量。从仿真结果可以看出，与文献中具有平坦功率分布的方案相比，该方案在有效的链路和发射功率利用率以及服务质量方面很有希望。为了利用DVB-S2中的ACM功能并额外地调整功率，本文提出了一种自适应调制，编码（MODCOD）和功率方案。通过研究模糊系统和差分进化算法，分别为下一个传输间隔选择一组MODCOD和最佳功率矢量。从仿真结果可以看出，与文献中具有平坦功率分布的方案相比，该方案在有效的链路和发射功率利用率以及服务质量方面很有希望。在下一个传输间隔。从仿真结果可以看出，与文献中具有平坦功率分布的方案相比，该方案在有效的链路和发射功率利用率以及服务质量方面很有希望。在下一个传输间隔。从仿真结果可以看出，与文献中具有平坦功率分布的方案相比，该方案在有效的链路和发射功率利用率以及服务质量方面很有希望。