摘要
LINC(Linear Amplifier Using Nonlinear Components)技术是使用非线性的功放来实现信号的线性放大。LINC技术克服了传统线性化技术的效率低,带宽窄的问题,理想情况下能够达到100%的效率。信号分离是LINC的关键技术,信号分离的特性严重影响了LINC合成信号的性能。根据LINC技术信号分离原理,采用CORDIC算法来实现输入信号的幅相分离,将输入的调幅调相的变包络信号分离成两路恒包络调相信号。同时采用了一种优化的信号分离算法,把初步分离的两路数据进行角度比较,根据选择最小夹角原则重新分配两路数据,达到改进信号包络的目的。对信号分离过程进行仿真验证,表明信号的恒包络特点得到了显著改善,最后使用FPGA实现。
The Linear Amplifier Using Nonlinear Components（LINC） transmitter provides linear amplification by using nonlinear but power efficient amplifiers.LINC technology has overcome such shortcomings as Low efficiency and narrow-bandwidth,LINC Transmitter could achieve an efficiency of 100% in the ideal circumstance.Based on the principle of LINC signal separation technique,CORDIC algorithm is adopted to achieve the amplitude-phase separation of input signal,and the varying envelope signal of input phase and amplitude modulation is separated into two constant envelope phase and amplitude modulation.In this paper,an optimized signal component separate（SCS） is adopted,the initial two-way data point separated is compared.According to the selection principle of the minimum angle,the two-channel data is re-allocated to improve the signal envelope.Simulation on the signal separating process indicates that the signal characteristics of constant-envelope could be significantly improved,and FPGA is used for implementation.
出处
《通信技术》
2010年第5期21-23,共3页
Communications Technology
基金
国家高技术研究发展计划(863计划)资助项目(批准号:2007AA01Z283)
