Efficient FPGA Implementation of MIMO Decoder for Mobile WiMAX System
Efficient FPGA Implementation of MIMO Decoder for Mobile WiMAX System
复制标题
用于移动 WiMAX 系统的 MIMO 解码器的高效 FPGA 实现
DOI：
10.1109/icc.2009.5198971
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
S. Habib
中科院分区：
文献类型：
--
作者：
Mohamed S. Khairy;M. Abdallah;S. Habib
In this paper, we present a FPGA prototyping of the MIMO Decoder for the IEEE 802.16e WiMAX mobile systems. The IEEE 802.16e standard supports three types of MIMO space time codes (STC), referred to in the standard by matrix A, B, and C, that achieve different levels of throughput and diversity depending on the quality of the MIMO channels. In particular, the STC matrix A achieves full diversity by employing the Alomuti coding, while the STC matrix B achieves full rate by employing spatial multiplexing and the STC matrix C achieves full rate and diversity by employing the Golden code. In this paper, we present a FPGA architecture of MIMO decoder based on the fixed sphere decoder (FSD) algorithm that achieves close-to ML BER performance with a reduced computational complexity and fixed throughput. We show how a single FSD can be used to decode the different STC by adaptively processing the received signal according to the STC type prior to be fed to the FSD. The FPGA design is incorporated with a QR decomposition of the channel matrix. The proposed FSD achieves fixed and high throughput required for the WiMAX systems. The FPGA implementation is incorporated with a MATLAB simulation model of an FUSC OFDMA-based WiMAX 2x2 MIMO system to validate the hardware design.
