Throughput/area efficient FPGA implementation of QR decomposition for MIMO systems
Wei Zhao, Jianqiang Lin, S. C. Chan · 2016
QR Decomposition (QRD) plays an important role in emerging multiple-input multiple-output (MIMO) systems. This paper proposes a basic master-slave-pair element for complex-valued QRD by exploring the CORDIC-based Three Angle Complex Rotation (TACR) method. Based on this basic element, a new low-complexity high-throughput structure is proposed. The proposed structure demonstrates its scalability for other matrix sizes. The computational error analysis and the resource utilization are evaluated with various wordlengths. We also study its fixed-point implementation on field-programming gate array (FPGA). Our structure can achieve 0.934MMatrices/sec throughput at the maximum working frequency 128MHz and show more efficient throughput/area than other works.