Transmission Capacity of Ad-hoc Networks With Multiple Antennas Using Transmit Stream Adaptation and Interference Cancellation
Transmission Capacity of Ad-hoc Networks With Multiple Antennas Using Transmit Stream Adaptation and Interference Cancellation
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DOI：
10.1109/tit.2011.2173712
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发表时间：
2012-02
影响因子：
2.5
通讯作者：
R. Vaze;R. Heath
中科院分区：
文献类型：
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作者：
R. Vaze;R. Heath
ad-hoc网络的传输容量是每单位面积上活动发射机的最大密度，对于固定的传输速率，在每个接收机处给定中断约束。假设发射机位置服从泊松点过程分布，推导了每个节点配备多根天线时ad-hoc网络传输容量的上下界.发射机使用本征多模波束成形或其天线的子集而不使用信道信息来发送多个数据流，而接收机使用部分迫零来使用其空间接收自由度（SRD 0 F）中的一些来消除某些干扰。接收机或者消除最近的干扰源，或者消除最大化消除后信号干扰比的干扰源。使用所获得的界限，最佳的数据流的数量来发送，和最佳的SRDOF用于干扰消除推导出提供最佳的缩放的传输容量与天线的数量。在波束成形的情况下，单个数据流传输连同使用除了一个SRD 0 F之外的所有SRD 0 F用于干扰消除是最佳的，而在没有波束成形的情况下，单个数据流传输连同使用总SRD 0 F的一部分用于干扰消除是最佳的。
The transmission capacity of an ad-hoc network is the maximum density of active transmitters per unit area, given an outage constraint at each receiver for a fixed rate of transmission. Assuming that the transmitter locations are distributed as a Poisson point process, this paper derives upper and lower bounds on the transmission capacity of an ad-hoc network when each node is equipped with multiple antennas. The transmitter either uses eigen multi-mode beamforming or a subset of its antennas without channel information to transmit multiple data streams, while the receiver uses partial zero forcing to cancel certain interferers using some of its spatial receive degrees of freedom (SRDOF). The receiver either cancels the nearest interferers or those interferers that maximize the post-cancellation signal-to-interference ratio. Using the obtained bounds, the optimal number of data streams to transmit, and the optimal SRDOF to use for interference cancellation are derived that provide the best scaling of the transmission capacity with the number of antennas. With beamforming, single data stream transmission together with using all but one SRDOF for interference cancellation is optimal, while without beamforming, single data stream transmission together with using a fraction of the total SRDOF for interference cancellation is optimal.