Orthogonal Frequency Division Multiplexing (OFDM) is the one of the most preferred multiplexing technique for realizing high-speed wireless communication, like Long Term Evolution (LTE) and LTE-Adv. In the era of digital wireless communication, applications of wavelet theory have been favorably applied in many areas of signal processing. Orthogonality, flexible time-frequency analysis, and the ability to characterize signals accurately have attracted the attention of the telecommunication community to use wavelet as a basis function for OFDM. In this paper, discrete wavelet transform (DWT) has been proposed as an alternative signal analysis with multiple merits such as support high-speed applications, immune to distortion, wavelet diversity, better error performance, and efficient bandwidth utilization. A simulative analysis of various wavelets, at different modulation techniques, over OFDM has been presented to demonstrate the improvement in BER performance. Further, in accordance with the LTE parameterization over 1.25 MHz band, the performance of wavelet-based OFDM (WOFDM) is found significantly higher in terms of maximum achievable data rate and system spectral efficiency.

中文翻译：

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LTE 1.25 MHz频段上的WOFDM分析

正交频分复用（OFDM）是用于实现高速无线通信（如长期演进（LTE）和LTE-Adv）的最优选的复用技术之一。在数字无线通信时代，小波理论的应用已在信号处理的许多领域得到了有利的应用。正交性，灵活的时频分析以及准确表征信号的能力吸引了电信界的关注，即使用小波作为OFDM的基本功能。本文提出了离散小波变换（DWT）作为具有多种优点的替代信号分析，例如支持高速应用，抗失真，小波分集，更好的错误性能和有效的带宽利用率。各种小波的模拟分析，在不同的调制技术下，已经提出了OFDM技术来证明BER性能的提高。此外，根据1.25 MHz频段上的LTE参数化，发现基于小波的OFDM（WOFDM）的性能在最大可达到的数据速率和系统频谱效率方面明显更高。