基于干扰对齐的设备到设备功率控制算法

Device to device power control algorithm based on interference alignment

为了使蜂窝网络系统中设备到设备(D2D)用户的速率总和最大,提出了一种基于干扰对齐(IA)的功率控制算法.该算法通过IA技术使得所有的D2D用户能够同时占用可使用的子载波;同时,控制每一个D2D用户在子载波上的功率,使所有D2D用户在对蜂窝用户(CU)产生的干扰小于干扰阈值的前提下,其速率和达到最大.仿真结果表明:与传统的基于频分多址(FDMA)的功率控制算法相比,本算法在干扰阈值为10 d Bm时,所得到的D2D用户的总速率和可提升约6 bit·S-1·Hz-1.

In this paper,we present a power control algorithm based on interference alignment（ IA） for device to device（ D2D）network. The algorithm provides the opportunity for all D2 D Links to share the available subcarriers simultaneously using IA technique. Besides,it controls the power budget of each D2 D pair in order to maximize the sum-rate of the system without inducing excessive interference to cellular users（ CU）. Simulations show that the proposed power control algorithm achieves a significant sumrate increase up to 6 bit·s- 1·Hz- 1when the interference treshold is 10 d Bm,which is compared with traditional prower control algorithm based on frequency division multiple access（ FDMA）.