Successive Approaching Phase Rotation Algorithm for Amplitude & Phase Computation in Demodulation

摘要：

A Successive Approximation Phase Rotation Algorithm (SAPR), based on Data Table, was presented to calculate amplitude and phase from In-phase and Quadrature-phase data as to avoid complicated calculation using square root and arctangent transcendental functions in digital demodulation. Multiplication is only needed in the algorithm by using data table stored in large capacity memory, the procedure is simple and fast. The algorithm can be realized by the use of CPU, Field Programmable Gate Array-FPGA and Synchronous Dynamic Random Access Memory-SDRAM. The sinuous values of certain bits are stored in the SDRAM after being quantized. And FPGA reads the sine values in the SDRAM to calculate the amplitude and phase according to I/Q data in demodulation. The algorithm has the characteristic of convenient 、high speed and high accurate.

关键词： demodulation amplitude phase successive approximation phase rotation algorithm

作者: Xie Baozhong Chen Tiequn Liu Guixiong

作者单位: College of Mechanical Engineering in South China University of Technology,Guangzhou 510640 China

会议类型: 国际会议

会议名称: 第八届国际电子测量与仪器学术会议(Proceedings of 2007 8th International Conference on Electronic Measurement & Instruments)

会议地点: 西安

会议语种:英文

在线出版日期: 2007-08-16（万方平台首次上网日期，不代表论文的发表时间）