Today, in this post, I will briefly explainedOFDM– a transmission technique,OFDMA– a modulation method andMU-MIMO– a revolutionary technology. Introduction to OFDM: OFDM is a short forOrthogonal Frequency Division Multiplexing.Itis a transmission technique that consists of the multiplexing of a set...
关键词正交频分复用;系统仿真;快速傅立叶变换;保护间隔中图分类号TP393.9MethodofCreationProcessofOFDMSimulationSystemYuanXichao(PLAElectronicEngineeringInstitute,Hefei230037)AbstractThebasicprincipleofOFDMisexplained.ThecreationprocessofOFDMsimulationsystemisshowedstep场step.FromthebasicmodelofsimulationOFDMmodulationand...
In the case of a BPSK modulation, the error probability at the relay node R on the nth subcarrier has the following expression: (24) Recalling that the probability of the correct decision at the relay node R on the nth subcarrier is equal to 1 − P(eR)[n], then it is expressed...
(IFFT/FFT,cyclicprefix,modulation/demodulation,channelestimation,bitloading).Inthefollowingsection,thesystemarchitectureisanalysed.Thetransmissionprotocol,aswellasthesystemparametersareexplainedindetails.Then,theDSPimplementationisdiscussed.Finally,theresultsareprovidedinthelastchapter.1AknowledgmentWewouldliketothank...
OFDM modulationframe synchronizationsynchronization errorsThis article focuses on frame synchronization for orthogonal frequency division multiplexing modulation. At the beginning of the article general principles of this modulation are explained. Then influence of inaccurate synchronization in receiver is described...
This contribution 1 complements the discussion of part I of this paper dealing with the novel pseudo-random postfix OFDM (PRP-OFDM) modulation scheme and extends the results to a Doppler scenario. A new moving-average (MA) Doppler model is provided aiming at a better fit of the Jakes channel...
(PAPR) caused by complex modulation schemes. The use of high PAPR signals requires a large enough back-off in the power amplifier operating to satisfy the stringent linearity requirement, but this region shows a very low PA efficiency. Recent trends in efficient and linear PA research are ...
3, to correct the channel estimate and control time interpolation, as it will be explained later. The output of block 20 for the u-th OFDM frame will be denoted by Ŷ(u), it can be obtained using different known techniques: LS, MMSE, SVD, etc. In an example, block 20 aims at ...
The concept of space-time coding is explained in a systematic... JK Daksh,R Mohan,S Sharma - 《International Journal of Advanced Computer Research》 被引量: 17发表: 2013年 MIMO-OFDM系统中降低峰均比技术的研究 多输入多输出(MIMO)技术充分开发空间资源,利用多个天线实现多发多收,在不增加频谱资源和...
FIG. 2A is a diagram of a physical layer (PHY) data unit 200 that the AP 14 is configured to transmit to a client station (e.g., the client stations 25-1) via orthogonal frequency domain multiplexing (OFDM) modulation, according to an embodiment. In an embodiment, the client station ...