摘要
高斯频移键控(GFSK)是一种广泛应用于低数据速率的个人通信标准(如蓝牙)的调制方式。限于低功耗和低成本,GFSK收发机通常在模拟域设计。为了改进误比特率和提高不同的复杂设备之间的综合能力,数字GFSK解调技术应运而生。本文对数字GFSK调制解调算法进行研究与仿真,重点研究一种载波同步算法的实现。本文采用的这种载波同步方式是利用判决反馈差值补偿的方法来消除载波频率偏移。通过在MATLAB上进行仿真,在高斯白噪声环境中实现了理想误码率的GFSK传输仿真。
Gaussian frequency shift keying （GFSK） modulation is widely used in low data-rate personal communication standards like Bluetooth. For the purpose of low power and low cost,GFSK transceivers are usually designed in the analog domain. To improve bit error rate （BER） performance and the integration capability for diverse and complicated applications,the digital GFSK demodulation technology becomes attractive. So we simulate the digital GFSK modulation and demodulation,and focus on the realization of a carrier synchronizer in this paper. This carrier synchronizer uses a decision-aided data cancellation algorithm to estimate carrier frequency offset. The complete GFSK transmission simulation is performed and almost ideal BER performance is achieved in the additive white Gaussian noise environment through the MATLAB simulation.
出处
《电子测试》
2010年第10期52-55,63,共5页
Electronic Test
