摘 要 本文首先对正交频分复用技术（OFDM）做了简要的说明，并在此基础上详细介绍了OFDM基带系统调制解调的相关部分——MQAM和IFFT/FFT，并最终确定软件仿真的系统参数——在12个子载波的框架下，选用32进制正交幅度调制和16点的快速傅立叶变换来实现此正交频分复用基带系统。 Abstract: this article briefly describes the Orthogonal Frequency Division Multiplexing (OFDM) technology, and on this basis presents in detail the parts, MQAM and IFFT/FFT，associated with the modulation and demodulation of OFDM baseband system, finally determines the system parameters for software simulation. The OFDM baseband system is implemented under the frame of 12 subcarriers, choosing duotricenary quadrature amplitude modulation and 16 points FFT. 同时本文对与数字基带信号传输有关的扰码与解扰部分做了详细的介绍，并设计了不同的参数进行性能分析，以便对本系统有更全面的了解。 In the same time the article presents in detail the scrambling and descrambling parts associated with the transmission of digital baseband signal; and designs various parameters to conduct performance analysis, so as to have more comprehensive knowledge of this system. 在本文的软件实现部分中，我们利用DSP仿真软件CCS——Code Composer Studio,对扰码/解扰、32进制正交幅度调制映射和解调映射、快速傅立叶正逆变换这些主要算法进行了实现和优化，并最终实现了OFDM基带系统的调制与解调功能。 In the software implementation part of this article the author uses DSP simulation software, CCS(Code Composer Studio), to implement and optimize the main algorithms for scrambling/descrambling, duotricenary quadrature amplitude modulation mapping and demodulation mapping, and IFFT/FFT, and eventually realizing the modulation and demodulation functions of the OFDM baseband system.
游客2
This article first orthogonal frequency division multiplexing (OFDM) has done a brief description, and on this basis, details of the OFDM baseband modulation and demodulation of the relevant parts of the system - MQAM and IFFT / FFT, and ultimately determine the software simulation The system parameters - in the context of 12 sub-carrier, use 32-ary quadrature amplitude modulation and 16-point fast Fourier transform to achieve this orthogonal frequency division multiplexing baseband system.
At the same time this paper with the digital baseband signal transmission and descramble the scrambled part of a detailed description, and designed for performance analysis of different parameters in order to present a more comprehensive understanding of the system.
老师一般都不看英文的。。 主要你论文格式OK就行，凑合用吧
游客3
Abstract Based on orthogonal frequency division multiplexing (OFDM) provides a brief explanation, and on the basis of detailed introduces the OFDM baseband related parts of demodulation system - MQAM IFFT/FFT, and finally determined and software simulation system parameters in 12 - tall carrier under the framework of the system, the selection of orthogonal amplitude modulation of 32 and 16 points to realize the fast Fourier transform the orthogonal frequency division multiplexing baseband system. The paper with digital baseband signal transmission relevant scrambler with unfasten harass a detailed introduction and analysis of the different parameters, so that our system performance will have a more comprehensive understanding. In this part of the software, we use DSP simulation software Studio - Code Composer, CCS for scrambler/unfasten harass, amplitude modulation system and orthogonal demodulation mapping, mapping and fast Fourier transform is the main algorithms and optimization, and finally achieve the OFDM baseband system of modulation and demodulation function.
游客1
摘 要
本文首先对正交频分复用技术（OFDM）做了简要的说明，并在此基础上详细介绍了OFDM基带系统调制解调的相关部分——MQAM和IFFT/FFT，并最终确定软件仿真的系统参数——在12个子载波的框架下，选用32进制正交幅度调制和16点的快速傅立叶变换来实现此正交频分复用基带系统。
Abstract: this article briefly describes the Orthogonal Frequency Division Multiplexing
(OFDM) technology, and on this basis presents in detail the parts, MQAM and IFFT/FFT，associated with the modulation and demodulation of OFDM baseband system, finally determines the system parameters for software simulation. The OFDM baseband system is implemented under the frame of 12 subcarriers, choosing duotricenary quadrature amplitude modulation and 16 points FFT.
同时本文对与数字基带信号传输有关的扰码与解扰部分做了详细的介绍，并设计了不同的参数进行性能分析，以便对本系统有更全面的了解。
In the same time the article presents in detail the scrambling and descrambling parts associated with the transmission of digital baseband signal; and designs various parameters to conduct performance analysis, so as to have more comprehensive knowledge of this system.
在本文的软件实现部分中，我们利用DSP仿真软件CCS——Code Composer Studio,对扰码/解扰、32进制正交幅度调制映射和解调映射、快速傅立叶正逆变换这些主要算法进行了实现和优化，并最终实现了OFDM基带系统的调制与解调功能。
In the software implementation part of this article the author uses DSP simulation software, CCS(Code Composer Studio), to implement and optimize the main algorithms for scrambling/descrambling, duotricenary quadrature amplitude modulation mapping and demodulation mapping, and IFFT/FFT, and eventually realizing the modulation and demodulation functions of the OFDM baseband system.
游客2
This article first orthogonal frequency division multiplexing (OFDM) has done a brief description, and on this basis, details of the OFDM baseband modulation and demodulation of the relevant parts of the system - MQAM and IFFT / FFT, and ultimately determine the software simulation The system parameters - in the context of 12 sub-carrier, use 32-ary quadrature amplitude modulation and 16-point fast Fourier transform to achieve this orthogonal frequency division multiplexing baseband system.
At the same time this paper with the digital baseband signal transmission and descramble the scrambled part of a detailed description, and designed for performance analysis of different parameters in order to present a more comprehensive understanding of the system.
老师一般都不看英文的。。 主要你论文格式OK就行，凑合用吧
游客3
Abstract
Based on orthogonal frequency division multiplexing (OFDM) provides a brief explanation, and on the basis of detailed introduces the OFDM baseband related parts of demodulation system - MQAM IFFT/FFT, and finally determined and software simulation system parameters in 12 - tall carrier under the framework of the system, the selection of orthogonal amplitude modulation of 32 and 16 points to realize the fast Fourier transform the orthogonal frequency division multiplexing baseband system.
The paper with digital baseband signal transmission relevant scrambler with unfasten harass a detailed introduction and analysis of the different parameters, so that our system performance will have a more comprehensive understanding.
In this part of the software, we use DSP simulation software Studio - Code Composer, CCS for scrambler/unfasten harass, amplitude modulation system and orthogonal demodulation mapping, mapping and fast Fourier transform is the main algorithms and optimization, and finally achieve the OFDM baseband system of modulation and demodulation function.