论文标题
通过非线性处理在没有飞行员的情况下接近容量
Approaching Capacity Without Pilots via Nonlinear Processing at the Edge
论文作者
论文摘要
在最大似然估计框架内得出的非线性检测器被证明在非合作无线系统的上行链路通道上检索用户的通道系数和数据有效，而无需接入点具有任何先前的通道状态信息（没有CSI或非CONERENT设置）。与其依靠飞行员辅助的传输，不如表明基于最大似然的检测器自然而然地从信息理论论据中出现。设计探测器的假设如下：1）来自不同用户的上行链路数据是独立的和非高斯的； 2）通道的相干块比用户数量大得多（实际上，用户数量的平方）； 3）接入点或基站的天线数量等于用户数量； 4）用户在连贯块中不断传输； 5）传输以高信噪比发生。访问点和意外用户之间无需协调（干扰）。需要与预期用户进行一些协调。最后，假定系统是符号同步。
A nonlinear detector derived within a maximum likelihood estimation framework is shown to be effective in retrieving the channel coefficients and data of users on the uplink channel of a noncooperative wireless system without the access point having any prior channel state information (no CSI or noncoherent setup). Rather than relying on pilot-assisted transmissions, it is shown that a maximum likelihood-based detector emerges naturally from an information-theoretic argument. The assumptions under which the detector is designed are as follows: 1) the uplink data from different users are independent and non-Gaussian; 2) the coherence block of the channel is much larger than the number of users (in practice, the square of the number of users); 3) the number of antennas at the access point or base station is equal to the number of users; 4) users continuously transmit within the coherence block; and 5) the transmission occurs at high signal-to-noise ratio. No coordination between the access point and unintended users (interference) is needed. Some coordination with intended users is needed. Finally, the system is assumed to be symbol-synchronous.
