Questions tagged [channel-estimation]
29 questions
2
votes
1 answer
How determine the delay in my signal practically
I am trying to practically determine filter group delay so that I can try to reduce or adjust for it. I have tried all kinds of methods but still can't get the right result. I know that theoretically to get the group delay you should differentiate…
Chika
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2
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2 answers
System Identification with a Limited Bandwidth Input Signal and Region of Interest
Given a FIR filter $h[n]$. Its action can described as:
$$
\mathbf{y} = \mathbf{H} \mathbf{x} \\
\mathbf{y} = \mathbf{X} \mathbf{h}
$$
where $\mathbf{H}$ and $\mathbf{X}$ is a Toeplitz matrix.
If $h$ is unknown, Least Squares with a white Gaussian…
divB
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1
vote
1 answer
Channel estimation using bit reversed order of FFT matrix
Is it possible to use the bit-reverse order of FFT instead of FFT to estimate the channel?
Based on my reading, I found that bit reversed order of FFT matrix can diagonalize the channel, but unfortunately it can't estimate the channel based on pilot…
New_student
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1 answer
Why SRS signalling is used in 5g?
Since DMRS is also being used as a reference signal in PUCCH and PUSCH channel, so why an extra SRS signalling is required.
Nits r
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1
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1 answer
Capacity and channel estimation algorithms: explanation of results
I study a spectral efficiency of a system with a precoding scheme with different channel schemes.
Algorithm A for channel estimation gives a smaller estimation error instead of Algorithm B.
I have computed the precoding schemes using the resulted…
Noel Miller
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1
vote
0 answers
Compressive sensing based sparse vector estimation
I am newbie in compressive sensing (CS), I read about compressive sensing and its use for sparse vector estimation. As I understood CS can be used either in time or frequency domain. For me, The part I couldn't understand in my case is how to build…
Fatima_Ali
- 526
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1
vote
1 answer
LTE Channel Estimation
I am trying understand LTE channel estimation. I have multiple questions:
How much phase shift does a typical LTE channel have?
Can all that be corrected using pilots?
Where do we typically implement these algorithms? In a processor or FPGA?…
Sampath
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1
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1 answer
A Delay Between Two Filtered Chaotic Signals
it is a common practice to use a shift of cross-correlation peak to evaluate a group time delay of two signals (chaotic signals are included). Can one synchronously and equally filter these chaotic signals (one is a shifted copy of the other) and…
Sergey
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0
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1 answer
Do you recommend a textbook on channel estimation of narrowband communications?
I would like to learn the channel estimation of narrowband communications (i.e., not OFDM).
Do you recommend a textbook (chapter from a textbook) on this subject?
Noor
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0
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0 answers
Tapped Delay Line channel model in wireless communication
Can someone explain the difference between tdl (Tapped Delay Line) -a , tdl-b and tdl-c and their use cases?
0
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I am trying to estimate the Channel Impulse Response(time domain) for a 5G-NR signal using the DMRS-PBCH pilots only , any suggestions
I want to obtain the $h(t)$, the channel impulse response for my NR signal using the DMRS PBCH pilots only.
Tina
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Pilot Signal Overhead
I have a doubt regarding Pilot signals such as CSI-RS in NR.
Using a large number of CSI-RS affects Datarate significantly?
or it is negligible?
Because I wonder it is meaningful that optimize the number of CSI-RS.
Have a nice day!
Kitae Kim
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0
votes
1 answer
Do the effects of OFDM pilot tones spacing appear in time or in frequency domain?
As known, the pilot tones are transmitted via subcarriers predefined and known in the transmitter and the receiver. The pilot spacing is repeated with a certain rate that depends on how fast the channel changes.
I am talking about comb-type channel…
Fatima_Ali
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- 11
0
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Generating a 2D delay-Doppler channel matrix
I was wondering if anyone here has any idea on 2D delay-Doppler channel and how to generate the channel matrix?
Even a hint or a resource would be helpful. I just want to understand and visualize the channel nicely so that I can write a program on…
Amit Sravan
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Understanding MMSE equalizer equation
I have read many online materials and journal paper where the equation for MMSE equalizer is given as:
$G_{MMSE}$ = $H^H(HH^H+\nu^2I )$
where $H$ is the channel, $H^H$ is its hermitian. $\nu^2$ is noise variance (a statistical property) and $I$ is a…
SAM
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