具有MIMO MMSE接收机的无线自组网容量研究
On capacity of wireless ad hoc networks with MIMO MMSE receivers
摘要：
无线ad-hoc网络在家庭、商业场所和热点地区被广泛采用，预计在不久的将来，它将提供与有线对等网络并行的宽带服务。为了解决这一需求，能够提供数倍容量增加的MIMO技术具有重大的前景。以前的工作的ad-hoc网络的容量分析是基于一个隐含的假设，每个节点只有一个天线。分析的核心是一个几何区域的特征，称为排除区域，它量化了一个链接占用的空间资源的量。然而，当在每个节点处部署多个天线时，多个链路可以同时在彼此附近进行传输，因为现在可以通过空间信号处理来抑制干扰。因此，链路不再独占地占据几何区域，使得“排除区域”的概念不再适用。在本文中，我们研究了MIMO ad-hoc网络的链路层吞吐量容量。与以前的工作相比，每个链路占用的空间资源量的特征在于它对其他链路施加的实际干扰。为了计算链路层容量，我们首先推导出接收机处的检测后SINR的概率分布。然后使用结果来计算活动链路的数量和区域内可以维持的相应数据率。我们的分析将作为MIMO ad-hoc网络的介质访问协议的设计指南。据我们所知，本文是第一次尝试通过考虑实际的物理层信号和干扰模型来表征MIMO ad-hoc网络的容量。
英文摘要：
Widely adopted at home, business places, and hot spots, wireless ad-hoc networks are expected to provide broadband services parallel to their wired counterparts in near future. To address this need, MIMO techniques, which are capable of offering several-fold increase in capacity, hold significant promise. Most previous work on capacity analysis of ad-hoc networks is based on an implicit assumption that each node has only one antenna. Core to the analysis therein is the characterization of a geometric area, referred to as the exclusion region, which quantizes the amount of spatial resource occupied by a link. When multiple antennas are deployed at each node, however, multiple links can transmit in the vicinity of each other simultaneously, as interference can now be suppressed by spatial signal processing. As such, a link no longer exclusively occupies a geometric area, making the concept of "exclusion region" not applicable any more. In this paper, we investigate link-layer throughput capacity of MIMO ad-hoc networks. In contrast to previous work, the amount of spatial resource occupied by each link is characterized by the actual interference it imposes on other links. To calculate the link-layer capacity, we first derive the probability distribution of post-detection SINR at a receiver. The result is then used to calculate the number of active links and the corresponding data rates that can be sustained within an area. Our analysis will serve as a guideline for the design of medium access protocols for MIMO ad-hoc networks. To the best of knowledge, this paper is the first attempt to characterize the capacity of MIMO ad-hoc networks by considering the actual PHY-layer signal and interference model.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
