Diversity-multiplexing tradeoff (DMT) of a full-duplex diamond network where the inter-relay interference (IRI) is suppressed, global channel state information (CSI) is available in all nodes, and perfect self-interference cancellation (SIC) technique is used, which we call it the perfect full-duplex diamond network, is an upper bound for the DMT of the equivalent half-duplex diamond network, i.e., the perfect full-duplex diamond network outperforms the half-duplex case. Nevertheless, the implementation of the perfect full-duplex diamond network is a high-cost operation and requires significant hardware changes in current systems. The main question addressed in this paper is: under which condition (or perhaps conditions) does a prevalent half-duplex diamond network provide the same performance as the perfect full-duplex one? In this regard, first, we calculate the DMT of a perfect full-duplex multiple-relay and multiple-antenna (MRMA) symmetric diamond network. Then, we demonstrate that for the same network but with half-duplex relays, when the number of antennas in relays satisfies a specific condition, there exists a fixed listen-transmit schedule combined with quantize-map-and-forward (QMF) relaying to achieve the optimal DMT. Also, we attain a lower bound for the total number of antennas of the MRMA symmetric diamond network to achieve the optimal DMT.

全双工菱形网络的分集复用折衷（DMT），其中中继间干扰（IRI）被抑制，全局信道状态信息（CSI）在所有节点中可用，并且完美的自干扰消除（SIC）技术是所谓的完美全双工钻石网络，是等效半双工钻石网络DMT的上限，即，完美的全双工钻石网络的性能优于半双工情况。然而，完美的全双工钻石网络的实现是一项高成本的操作，并且需要对当前系统进行重大的硬件更改。本文所要解决的主要问题是：在哪种条件下（或可能在某种条件下）流行的半双工菱形网络可提供与完美的全双工菱形网络相同的性能？在这方面，首先，我们计算出完美的全双工多中继和多天线（MRMA）对称钻石网络的DMT。然后，我们证明，对于具有半双工中继的同一网络，当中继中的天线数量满足特定条件时，将存在一个固定的侦听发送计划，并与量化映射转发（QMF）中继相结合。实现最佳DMT。同样，我们为MRMA对称菱形网络的天线总数设置了一个下限，以实现最佳DMT。存在一个固定的侦听发送计划，并结合了量化映射转发（QMF）中继以实现最佳DMT。同样，我们为MRMA对称菱形网络的天线总数设置了一个下限，以实现最佳DMT。存在一个固定的侦听-传输调度，结合量化映射转发（QMF）中继以实现最佳DMT。同样，我们为MRMA对称菱形网络的天线总数设置了一个下限，以实现最佳DMT。