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首页> 外文期刊>American journal of applied sciences >PERFORMANCE ANALYSIS OF DISCRETE WAVELET TRANSFORM BASED MULTIPLE INPUT MULTIPLE OUTPUT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM FOR DIFFERENT WAVELETS IN DIFFERENT CHANNEL ENVIRONMENT
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PERFORMANCE ANALYSIS OF DISCRETE WAVELET TRANSFORM BASED MULTIPLE INPUT MULTIPLE OUTPUT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM FOR DIFFERENT WAVELETS IN DIFFERENT CHANNEL ENVIRONMENT

机译：不同通道环境下基于离散小波变换的多输入多输出正交频分复用系统的性能分析

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摘要

Multiple Input Multiple Output (MIMO) and Orthogonal Frequency Division Multiplexing (OFDM) are the two assuring technologies that offers high data rate as required for the 4G wireless systems. Conventionally OFDM is Fast Fourier Transform (FFT) based system. It uses IFFT (Inverse FFT) blocks in the transmitter and FFT blocks in the receiver. OFDM combined with MIMO gives increased throughput and better system performance and hence FFT based MIMO OFDM systems are widely used in 4G wireless schemes. Recent researches shows that replacing the FFT with Discrete Wavelet Transform (DWT) the system performance can be further improved. This leads to a new scenario DWT based MIMO OFDM system. In this study one such system is simulated and the Bit Error Rate (BER) performance of the system is analysed for the different types of wavelets under different channel environments.
机译：多输入多输出（MIMO）和正交频分复用（OFDM）是两种保证技术，可提供4G无线系统所需的高数据速率。传统上，OFDM是基于快速傅立叶变换（FFT）的系统。它在发送器中使用IFFT（逆FFT）块，在接收器中使用FFT块。 OFDM与MIMO相结合可提高吞吐量并提高系统性能，因此基于FFT的MIMO OFDM系统已广泛用于4G无线方案中。最近的研究表明，用离散小波变换（DWT）代替FFT，可以进一步提高系统性能。这导致了一种新的基于DWT的MIMO OFDM系统。在这项研究中，模拟了一个这样的系统，并针对不同类型小波在不同信道环境下的系统的误码率（BER）性能进行了分析。

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