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引用次数: 0
摘要
3GPP(第三代合作伙伴计划)LTE(长期演进)高级标准目前正在进行中，其中4×4 MIMO(多输入多输出)方案是最小结构。支持最大数据速率传输的最佳解决方案之一是采用MIMO方案，特别是空间复用模式，这意味着每个天线端口可以传输单独的数据。为了实现该算法，主要问题是消除每个天线端口增加的干扰，因此，接收机上的算法应该具有良好的性能。在实现方面，从复杂度和性能两方面考虑，MMSE (Minimum Mean Square Error，最小均方误差)检测算法是一种合理的方法。此外，迭代接收机(IR)算法也可以应用于该系统。红外算法需要在复杂性和性能之间进行权衡。本文设计了一种合理且可实现的MIMO接收机结构，并展示了其在3GPP LTE Advanced系统中的性能，并通过所实现的测试平台系统验证了硬解码位、PIC-MMSE(并行干扰消除-MMSE)和1迭代PIC足以满足所要求的信噪比。
Performance of implemented 4×4 MIMO receiver for 3G LTE advanced system
3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) Advanced standards are currently under way, where 4×4 MIMO (Multiple Input Multiple Output) scheme is the minimum structure. One of the best solutions to support the maximum data rate transmission is to adopt a MIMO scheme, especially spatial multiplexing mode, which means that each antenna port can transmit separate data. To realize this algorithm, the main issue is to cancel interferences added to each antenna port, and therefore, the algorithm at the receiver should have good performances. In the aspect of implementation, MMSE (Minimum Mean Square Error) detection algorithm is a reasonable method considering both complexity and performance. Furthermore, an iterative receiver (IR) algorithm can also be applied to this system. An IR algorithm has a tradeoff between complexity and performance. In this paper, we designed a reasonable and implementable MIMO receiver structure and showed performance for 3GPP LTE Advanced system, and verified that hard decoded bits, PIC-MMSE (Parallel Interference Cancellation - MMSE) and 1-iteration PIC are enough to meet the required SNR using the implemented test-bed system.
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