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21 Threads found on edaboard.com: Power Delay Profile
Hello all. I'm working on FDTD + CPML and for now my objective is to plot the power delay profile or for other words a graph with time in order of power. I´m using TEz mode. The manner that I´m calculating the power in dBW is: 10log(((Ex^2+Ey^2)*lambda^2*1)/(120*pi*4*pi)) where I admite that (...)
Is the power delay profile dependent on the carrier frequency? I have read in many books that the delay spread for outdoor environment is in the order of 1 us. But that is for carrier frequency of around 900 Mhz. (cellular communication). I need the power delay profile (...)
Hi, I have some channel measurement data obtained in frequency domain using vector network analyzer. I would like to plot the power delay profile(PDP) of this data in Matlab. Can anyone tell me how to do this?? It is urgent... help please...
hi does the code bellow generate the 16-path rayleigh fading with uniform power delay profile? R=randn(1,16)+sqrt(-1)*randn(1,16);
Hi all, Could anyone please send me MATLAB code for PDP path searcher? PDP path searcher is one finger is Rake receiver in WCDMA My undergraduate titile is power delay profile path searcher and i have already search about PDP path searcher and try to begin the transceiver WCDMA in MATLAB, then i'm confused to simulated path searcher.. i (...)
The power delay profile from the original document for the PEC situation, the power is almost always at the same level (for example the multipath components are almost always in 12dB) , and in my simulation, the power is always decreasing with time. What kind of excitation do you use? If you use a (...)
Hello How to generate a channel with exponential power delay profile? Thanks in advance
Hi all, I'm measuring the frequency response and calculating the power delay profile. In between the transmitter and receiver, i kept the box with water(level-24cm). I'm measuring in indoor environment and also in Anechoic chamber. I calculated the rms delay spread for both cases. Indoor environment has 22ns rms (...)
Hello There, I am trying to learn how to calculate power delay profile in a ray-tracing situation like this: 3-Dimensional room, Origin (0, 0, 0) at a corner. room_dim = ; receiver_pos = ; src_pos = ; (distance between the Tx and Rx is sqrt((1-0)**2 + (1-1)**2 + (1-1)**2 ) = 1m Some additional parameters: UWB
1. since you have already mentioned transmitter/receiver correlation, I guess "uncorrelated rayleigh fading" is in temporal sense. 2. regarding the power delay profile, you can refer to 3GPP specification on MIMO channel "Spacial channel model for Multiple Input Multiple Output (MIMO) simulations", see attached
Would anyone please have any idea about how to find the h values of a channel when you know the power delay profile of this channel I have tried using the rayleighchan and filter commands I dont know how to find the h though which one is which. I have a 6 ray model Please help
Hi I'm simulating according to the existing paper. However, I dont understand some parameters and dont know how to generate them. Could anyone please help me? "The variance fo additive white gaussian noise at each receiver is assumed equal and unified. The fading channel is three-path Rayleigh fading channel with exponential power delay prof
I am not from a communication background and keenly interested in some advice on some problems. I am working on a TDMA system having time slot of 14.167ms for each frame. In which 255 pi/4 QPSK modulated symbols are transmitted. Symbol time is about 55.55 us. System have 25khz band width and system throughput is 36kbps. My fading channel mode
Hello Everyone. I´m computing a FDTD simulator to study the radio channel characteristics using power delay profile. I use a scenario 2550px x 2550px and I need more than 2 hours to have some kind of results. I´m reading about parallel computing with parallel computing toolbox and I tried some stuff...without good results... Tried to (...)
Hello guys!! I´m working with FDTD+CPML with the objective of do the characterization of a radio channel. I have done from the power delay profile, if the channel suffers from frequency selectiveness or flat fading. Now I need to calculate the coherence distance to calculate the coherence time in order to know if the channel (...)
as the pic shows , i design a delay cell by long channel length MOS, but the delay time is variant by VLV . Is any possible we can design a simple circiut by only simple modified inverter and it won't be infleuence by Vcc ? It
Hi all, Is it possible to create a small program (in Matlab, preferably)-- thinking about Monte Carlo simulation--that creates a fingerprint database? I would probably want to record/store 2D or 3D location information along with Channel Impulse Response (CIR) at that point. Now, I am not clear what precisely of the CIR could/should I try to r
Hi all; I would like to generate a discrete-time time-varying multipath (doubly selective) channel. How can I do that? Also, I need the power delay profile of the multipath channel to decay exponentially. Any help will be highly appreciated. Thanks
Hello, I want to estimate a channel based on LTE 3GPP EVA with given power delay profile (set of average power and delay of channel taps). tau = ; % relative delay (s) pdb = ;
I have carefully calculated the relation between SNR and Eb/N0, and currently because I simulate an OFDM system and I only use SNR on the receiver anttenna as the x-asix of the plot. I have already normalize the power of the wireless multipath channel to 1. In the paper for comparision the detail of the channel model was not described clearly,
I want o simulate the AGC function in a fading channel (TU6 for DVB-T,excactly). After reading many posts, I was completely comfused. 1. The rayleigh fading basically models a summary of some space equally distrubuted scattering waves( the space is 2-dimension but not 3-dimension). The summary is comply with some rayleigh-pdf-distribution. In m