The Effects of Symbol Rate Offset on the BER Performance of 16QAM Signals

摘要：

In non-cooperative communication we need to estimate of symbol rate blindly. Hence, it is necessary to correct symbol rate offset properly and estimate its effects on the receiving performance. In the paper, the symbol timing recovery loop using an acquisition-aiding technique (that is, adaptively adjusting loop bandwidth) can capture symbol rate offset of 1％ with the help of the lock detector for 16QAM signals. We analyze and simulate the effects for symbol rate offset of ±0.5％ and ±1％ on bit error rate (BER) performance over an additive white Gaussian noise (AWGN). The results show that under the same BER the real-time demodulation loss is less than 0.5dB compared to the theoretical value. In addition, an out-of-lock detector is proposed. Together with the lock detector, the out-of-lock detector can ensure the symbol timing recovery loop provide good steady performance and relatively fast convergence rate by adaptively adjusting loop bandwidth.

作者: Huanzhen Yang Tingyong Wu Lidong Zhu

作者单位: National Key Laboratory of Communication, University of Electronic Science and Technology of China, Chengdu, China

会议类型: 国际会议

会议名称: 2009国际通信电路与系统学术会议(ICCCAS 2009)(2009 International Conference on Communications，Circuits and Systems)

会议地点: 成都

会议语种:英文

页码: 96-99

在线出版日期: 2009-07-23（万方平台首次上网日期，不代表论文的发表时间）