一种新的超宽带MB-OFDM通信时序估计与补偿方案

2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08) Pub Date : 2008-05-05 DOI:10.1109/WOCN.2008.4542538

D. Sen, S. Chakrabarti, R. R. Raja Kumar

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引用次数: 0

摘要

提出了一种用于UWB MB-OFDM系统的低复杂度相关符号定时同步(CBTS)算法。该方案首先将接收到的样本与已知的训练样本相关联，然后通过将两个连续OFDM符号的相关样本与预定义的阈值进行比较，来识别第一个重要的多路径分量，从而试图在接收到的序文的帧同步(FS)序列中定位快速傅里叶变换(FFT)窗口的起点。该算法在所有UWB信道模型(CM)、cm2 - cm4上进行了计算机仿真测试;每个在17 dB信噪比(SNR)下实现100,000个噪声通道。通过时间估计的均方误差(MSE)和同步概率来衡量算法的性能。

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A new timing estimation and compensation scheme for ultra-wideband MB-OFDM communications

A low-complexity correlation based symbol timing synchronization (CBTS) algorithm for UWB MB-OFDM systems is presented here. The scheme attempts to locate the start of the fast Fourier transformation (FFT) window during frame synchronization (FS) sequence of the received preamble by firstly correlating the received samples with known training samples and then identifying the first significant multi-path component by comparing the correlated samples of two consecutive OFDM symbols against a predefined threshold. The algorithm is tested by computer simulation over all UWB channel models (CM), CM1-CM4; each for 100,000 noisy channel realizations under 17 dB signal-to-noise ratio (SNR). Performance of the proposed algorithm is measured through mean-squared error (MSE) of timing estimation and probability of synchronization.

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来源期刊

2008 5th IFIP International Conference on Wireless and Optical Communications Networks (WOCN '08)

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