How do I design a loop filter of DPLL in OFDM system?

Hi all, I am designing a loop filter of DPLL in 802.11ac OFDM system. The DPLL tracking is achieved by pilot symbols inserted into OFDM symbols. Importantly, the coefficients of loop filter...

01 February 2016 3,754 3 View

Does anyone know how to compute the soft output (LLR) of MIMO ZF-SIC/MMSE-SIC detector?

09 October 2015 224 4 View

How can I simulate the algorithm for a IEEE802.11ac PHY layer that can optimally reflect the performance of a real-circuit implementation?

I am working for a semi-conductor company. Now, my assignment is to design IEEE802.11ac PHY layer algorithm. However, the situation of theoretical simulation is very different from that of...

04 May 2015 828 8 View

How do you determine the minimum training frames for MIMO channel estimation over flat fading channel?

The reference I've read indicates that the minimum training frames should be greater or equal to the number of transmitter antennas. Herein, the training frames denote that S = [s1, s2, s3, ......

10 November 2014 332 7 View

Can anyone help with DS-CDMA over multipath?

DS-CDMA is divided into uplink and downlink communications. As for uplink, the users suffer from different channel impulse responses (CIRs). How the receiver estimates these CIRs and cancel it? As...

08 September 2014 9,342 9 View

How can I choose the length and decision delay of an equaliser trained by linear RLS or LMS in a simple BPSK modulation system ?

I am modelling an equaliser trained by linear RLS and LMS in a simple BPSK modulation system. I found a problem that, the short length of equaliser, (e.g. equal to length of CIR), is not able to...

08 September 2014 6,659 12 View

Does anyone know about carrier frequency offset estimation for DS-CDMA?

As for training sequence, we can use the known simples to estimate the channel and then cancel ISI. However, in reality, there are not only frequency-selective channel but also carrier frequency...

08 September 2014 7,232 12 View

Does anyone know how to determine the value of step size in LMS algorithm.?

I wanna to establish a inverse modelling to get a equalizer to combat the multipath channel. However, I found a problem that the training of LMS algorithm is very unstable under the Rayleigh...

07 August 2014 3,636 19 View

Can anyone give me some advice on correlation detection for a Complementary Code Key (CCK) modulation scheme?

My question is about CCK modulation scheme in IEEE 802.11b standard. CCK uses 8 complex polyphase complementary codes to represent a particular 8-bit sequence and achieve 8 chips per symbol. In...

07 August 2014 6,328 4 View

In a Bluetooth receiver, how can I get a correct channel selection in the low-IF, in terms of DQPSK and D8PSK?

I am engaging in a project of Bluetooth Modem design. I found a problem about the channel selection in the low-IF (1MHz ). Compared to GFSK, both DQPSK and D8PSK, in which symbol rate is 1MHz,...

03 April 2014 2,439 0 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

Anyone plz suggest relevant topic for research in image processing+Deep learning.?

I have selected brain tumor images ...but now found that already lots of research done n this topic.

03 March 2021 5,774 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Chlorinated organic formation in odor control scrubbers using hypochlorite?

I'm involved in a study of odor control technologies for municipal wastewater treatment plant. One of the control options involves a chemical 2-stage (acid/alkaline) packed bed scrubber. The...

03 March 2021 3,661 2 View

Is there a classification scheme for rock cavities or caverns with respect to their size and shape?

The range of forms and sizes of cavities in rock is very big. Is there a classification scheme for rock cavities regarding their size and shape?

02 March 2021 4,511 3 View

How to code open-ended questions in SPSS?

Hello all, In SPSS I am going to code 2 open-ended questions. I have already read all the answers and I made a list of the most important categories to which I can code the answers. This question...

02 March 2021 1,757 4 View

Image Processing and classification using keras/Tensorflow?

Do you have some recommendations approaches on Image processing and classification of plant diseases using TensorFlow/Keras?

02 March 2021 1,493 4 View

Which SAR dataset to use for generating coherency matrix and performing target decomposition (Description) ?

Working on chandrayaan-2 DFSAR data, there are three datasets available: 1) Slant range image data product: The slant range complex image file. Each pixel is represented by two 4-byte floating...

02 March 2021 8,481 3 View

Do you know any MR image dataset?

I would like to research on MR images (0.5T and 3T). Can you please suggest some websites that I can download dataset including both 0.5T and 3T MR images? Thank you.

02 March 2021 7,735 3 View

What element is driving the different slop in the low frequency tail?

My study consists simple corrosion inhibitors in salty brine. Right now I just fit my circuit with randles with CPE. Just wondering how the slop can given more info of the experiment. Or any...

01 March 2021 6,474 3 View