Farah Arabian

8 Questions 14 Answers 0 Followers

Questions related from Farah Arabian

What are MRC combining coefficnets in a sequential implementation of a combiner and MMSE equalizer?

In a receiver with OFDM demodulator using post FFT combining with one transmitter antenna and two receiving antennas, I see that MRC coefficients usually are defined as C_1(K) = H*_1[k] / (...

26 November 2021 9,967 5 View

How to implement pilot symbol aided channel estimation for OFDM systems?

I'm doing pilot symbols aided channel estimation for OFDM system. Based on estimation theory we know that maximum likelihood estimator for the channel (h_hat) is as the following: h_hat = X^-1*R,...

01 May 2020 9,350 0 View

What's refractive index of common materials such as concrete in the low frequency range of 5G like 3.7 GHz?

what's refractive index of common materials such as concrete in the low frequency range of 5G like 3.7 GHz?

07 January 2020 1,412 2 View

How to combine received signals to a cross polarized antenna in a mobile?

Does anybody know if we have a cross polarized antenna in a smartphone how the receive signal in the two ports usually combines? is using a 90 degree hybrid coupler a normal way to combine the...

11 October 2019 10,020 1 View

Do you know any paper that used cross correlation coefficient calculation to find similarity between two wide-band channels ?

Hi everyone, I calculated cross correlation coefficient to see how much two received signals to the ports of a cross polarized antenna are similar, I'm looking for a paper (publication) that used...

06 September 2019 1,228 3 View

F-OFDM vs. FBMC ?which one is a better match in 5G frequency range and why?

I know that in 5G, OFDM is going to be changed to some filtered versions of OFDM, like FBMC (filter bank multi carrier), GFDM (generalized frequency division multiplexing), UFMC (universal...

20 May 2019 2,106 11 View

What is the type of channel equalization technique that is used in smartphones?

Does anybody know what type of channel equalization techniques (I mean like MMSE, LMS, RLS, etc.) are used in the smart phones to work in different frequencies like the range of 3G or 4G?

13 May 2019 6,636 9 View

How a dual polarized receiver will recognize V/H components from a channel impulse response whose value is a complex in each specific time delay?

let's say I have a dual polarized antenna in the transmitter and receiver which have orthogonal components (linear, one port has vertical and the other has horizontal polarization), I calculated...

24 May 2018 2,172 13 View