数据采集与处理2024，Vol.39Issue(6)：1420-1431,12.DOI:10.16337/j.1004-9037.2024.06.011
OSIC检测中高效排序QR分解FPGA实现
Efficient FPGA Implementation of Sorted QR Decomposition in OSIC Detection
摘要
Abstract
Ordered successive interference cancellation(OSIC)is a commonly utilized signal detection algorithm in multiple input multiple output(MIMO)systems.However,the algorithm's performance in terms of throughput and latency is constrained by the computational complexity of the channel matrix inverse operation.Therefore,matrix inverse decomposition pre-processing with low computational complexity and high speed is the key to hardware implementation of the algorithm.In this paper,we adopt a hardware-accelerated matrix pre-processing scheme for sorted orthogonal triangle(QR)decomposition of the channel matrix,in which the sorting process introducing a fast estimation method for complex-valued 1-norm to eliminate complex modulus computation.The QR decomposition process uses a deeply pipelined coordinate rotation digital computer(CORDIC)iterative method to eliminate the element vectorization and nulling rotation angle computation in the Givens rotation process,thus a pipeline circuit structure with a reusable Givens rotation structure for QR decomposition is designed,obviating the necessity for multipliers in the matrix decomposition process.Simulation results demonstrate that the OSIC enhancement algorithm proposed achieves the bit error rate(BER)performance comparable to that of the signal-to-noise ratio-based OSIC detection algorithm.The CORDIC iterative Givens rotation structure proposed in this paper can achieve highly time-sharing multiplex.It significantly improves the system parallelism and reduces the resource consumption,and the system design clock attains up to 250 MHz,and the matrix decomposition throughput reaches 1.88 M Matrices/s,meeting the processing throughput and latency requirements of 4 or more antennas MIMO systems at the receiver.关键词
多输入多输出信号检测/排序连续干扰消除/排序QR分解/Givens旋转/现场可编程门阵列Key words
multiple input multiple output(MIMO)signal detection/ordered successive interference cancellation(OSIC)/sorted QR decomposition/Givens rotation/field programmable gate array(FPGA)分类
信息技术与安全科学引用本文复制引用
王海麟,冯献礼,辜方林,高明柯,赵海涛..OSIC检测中高效排序QR分解FPGA实现[J].数据采集与处理,2024,39(6):1420-1431,12.基金项目
国家自然科学基金(61931020). （61931020）
