Novel block decision feedback equalizers for MIMO-OFDM used in UTRA LTE for UTRA LTE

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• 作者：Zijian Bai ; Christoph Spiegel ; Guido H. Bruck ; Christian Drewes ; Jens Berkmann ; Bertram Gunzelmann ; Tobias Schol ; Peter Jung
• 刊名：Procedia Earth and Planetary Science
• 出版年：2009
• 出版时间：September 2009
• 年：2009
• 卷：1
• 期：1
• 页码：1425-1434
• 全文大小：299 K

文摘

The long term evolution of UMTS Terrestrial Radio Access, abbreviated as UTRA LTE, will use OFDM (orthogonal frequency division multiplexing) combined with MIMO (multiple-input multiple-output), termed MIMO-OFDM. And spatial multiplexing MIMO scheme is deployed in UTRA LTE downlink to provide high data rates. Considering the detection of spatial multiplexing signals, well-known techniques such as the V-BLAST schemes provide an attractive error ratio performance, but still a considerable signal processing effort, which merits further research towards less complex schemes. In this communication, the authors will propose a novel set of detection techniques which use intrinsic block decision feedback equalization (BDFE) characteristics instead of successive interference cancellation (SIC). Both zero-forcing (ZF) and minimum mean square error (MMSE) schemes based BDFE are proposed, termed as MIMO-BDFE-ZF and MIMO-BDFE-MMSE. Setting out from a novel general model for the evaluation of the signal-to-noise ratio (SNR) at the data detector output, the authors will evaluate the error ratio performance of the novel MIMO-BDFE and provide comparison results. It will be shown that the porposed scheme provide an attractive performance at a lower realization complexity.