A novel MAC protocol for IDMA-based multi-beam satellite communication systems

作者：Ge Xin; Liu Gongliang^*; Leung Victor C M; Zhang Naitong

来源：International Journal of Communication Systems, 2014, 27(12): 4038-4058.

DOI：10.1002/dac.2597

• IDMA
• satellite communications
• multi-beam
• MAC
• minimum power allocation
• SINR evolution

Considering the limitations of satellite communication systems and advantages of new emerging interleave-division multiple access (IDMA) technology, IDMA is introduced into the satellite systems, providing a new solution for multiple access techniques of satellite systems. To further validate the IDMA into satellite systems, a novel medium access control (MAC) scheme is proposed. In the random access channel, the interleave-division slotted ALOHA method is adopted to alleviate the collision of access requests. Furthermore, a novel minimum power allocation scheme based on signal-to-interference-plus-noise ratio (SINR) evolution is proposed to maximize the capacity of such an interference-sensitive system. By virtue of SINR evolution, our proposed scheme can accurately estimate multi-user detection efficiency with low computational cost and further reduce the transmitted power, illustrating the high power efficiency of IDMA. To further enhance the performance of the MAC protocol, an effective call admission control scheme considering the effect of power control error is designed and combined into our MAC protocol. Analysis and simulation results show that, by taking full advantage of the chip-by-chip multi-user detection technique, the proposed IDMA MAC protocol achieves high throughput and low average packet delay simultaneously, with low onboard processing complexity in the multi-beam satellite communication systems.

• 出版日期2014-12
• 单位哈尔滨工业大学