Learn smart - Learn online. Upto 80% off on courses for a limited time. View Courses

Securing Higher Grades Costing Your Pocket? Book Your Assignment at The Lowest Price Now!
Add File

Error goes here

Files Missing!

Please upload all relevant files for quick & complete assistance.

Guaranteed Higher Grade!

EEET5102 Mobile Communications And Wireless Access

tag 0 Download 11 Pages / 2,601 Words tag 18-01-2021


Consider a multipath channel with the following normalised power delay profile
τ (µs) 0 0.1 0.2 0.5 2
P dB 0 -10 0 -10 -30
1. Compute the (90% correlation) coherent bandwidth of the channel. Assume a bandwidth of 20MHz is available. Design the OFDM transmission scheme for the system, such that the subcarrier spacing satisfies ?f =Bc

Assume that one reference pilot for channel estimation is placed every 5 subcarriers. Determine
(a) The FFT size and the number of active subcarriers.
(b) The OFDM symbol duration, including a suitable choice of cyclic prefix period.
(c) The sampling rate of the system.
(d) The achievable bit rate if the 16-QAM input constellation is used.

3. State one advantage and one disadvantage of choosing a larger subscarrier spacing ?f.
4. Consider a SISO LTE system with frequency division duplex and a bandwidth of 1.4MHz.Extended CP is employed. The channel condition is such that 16-QAM can be used on all subcarriers. Compute the bit rate, taking into account spectral efficiency loss due to pilot signals.
Hint: this question requires you to do some research on the LTE radio access standard, for e.g. http: // www. teletopix. org/ 4g-lte/

Assignment 2:

Question 2: CDMA
Data for an uplink CDMA transmission is stored in the file CDMA data.mat. You can import the data into MATLAB by load ’CDMA data.mat’. The data include • channel (3 × 10) is the channel impulse response for each user.• U (3 × 100) is the spreading codes for each user.• rxsig: the received signal at the base station.Each user transmits 4 binary symbol. The data for user k is dk = [1, dk,1, dk,2, dk,3],
where the first bit is the pilot (known at the receiver) and dk,j ∈ {−1, 1}. The spreading code
U(k, :) is used for each data symbol of user k.
The channel model is summarised as txsigk ⊗ channel(k, :) + noise.where txsigk is the transmit signal from user i, and ⊗ denotes convolution.
1. Use rxsig to estimate the bits transmitted by user 1. At this stage, recover data from
one of its paths is sufficient. Show in your report the codes used for detection.
2. Assume that each user is active 30% of the time, and directional antenna provides an angular gain of 2.5. Determine the number of users that the system can simultaneously support if the signal-to-interference ratio requirement is 6dB. 
The following questions are optional. You can attempt to get some bonus marks.
3. Show how you make use of multipath to improve reliability of user 1.
4. In fact, each user has an additional channel path compared to that reported in channel.Determine the delay and gain of the additional paths of user 1 using the pilot symbol and the received signal rxsig. Hint: You can work out the missing delay by correlating the pilot transmit signal with rxsig. Then estimate the missing channel gain.
Question 3: Multi-antenna system
Consider a single-input multiple output system defined as y = HP x + n,where H is the channel matrix, x ∈ {−1, 1} is the transmit signal, and n = [n1, n2] is the noise vector, where ni is complex Gaussian noise with zero mean variance.
Download Sample Now

Earn back the money you have spent on the downloaded sample by uploading a unique assignment/study material/research material you have. After we assess the authenticity of the uploaded content, you will get 100% money back in your wallet within 7 days.

Unique Document

Under Evaluation

Get Money
into Your Wallet

Total 11 pages

Cite This Work

To export a reference to this article please select a referencing stye below:

My Assignment Help. (2021). Mobile Communications And Wireless Access. Retrieved from

"Mobile Communications And Wireless Access." My Assignment Help, 2021,

My Assignment Help (2021) Mobile Communications And Wireless Access [Online]. Available from:
[Accessed 25 June 2022].

My Assignment Help. 'Mobile Communications And Wireless Access' (My Assignment Help, 2021) <> accessed 25 June 2022.

My Assignment Help. Mobile Communications And Wireless Access [Internet]. My Assignment Help. 2021 [cited 25 June 2022]. Available from:

Getting nightmare regarding pending chemistry assignment? Then it is high time you consider hiring chemistry assignment help service of We at deliver quality subject specific assistance on more than 100+ subjects. For us, students' need is foremost, and we work round the clock to offer science, humanities and commerce assignment help. Among Commerce wing, our one of the most popular services is capital budgeting assignment help. In science segment, we have gained popularity with biology assignment help.

Latest Operations Samples

ISOL631 Operations Security

Download : 0 | Pages : 2

Answer: Computer security has become the most vital concern for many organisations in the recent scenario due to increasing rate of cyber crimes and the advancement in the technology. As it has been found that there is no particular computer incidence handling policy currently, it is important to consider a few. Making personal identity information compulsory:It should be the primary approach undertaken by the organization in order to check...

Read More arrow Tags: United States Chicago Management University of Chicago 

BUSI3321 Operations Management

Download : 0 | Pages : 0

Read More arrow Tags: Saudi Arabia Riyadh Management Book Review University of Riyadh 

CS401 Operating Systems

Download : 0 | Pages : 0
  • Course Code: CS401
  • University: Saylor Academy
    icon is not sponsored or endorsed by this college or university

  • Country: United States

Read More arrow Tags: United States Tampa Management University of Florida 

BUS300 Operations Management

Download : 0 | Pages : 0
  • Course Code: BUS300
  • University: Saylor Academy
    icon is not sponsored or endorsed by this college or university

  • Country: United States

Read More arrow

ACC6010 Accounting Concepts And Applications

Download : 0 | Pages : 5
  • Course Code: ACC6010
  • University: Edith Cowan University
    icon is not sponsored or endorsed by this college or university

  • Country: Australia

Answers: Specific names are given to the substituted orientations of spreadsheet. The main motive is to consider the easy association of depictions made in the spreadsheet with the calculations. The sort of example is seen with substituting the orientations of a cell with the names. A different location for the data entry is pivotal for accountants working in spreadsheet as it assist them in illustrating the data in single view under each row. ...

Read More arrow

Content Removal Request

If you are the original writer of this content and no longer wish to have your work published on then please raise the content removal request.

5% Cashback

On APP - grab it while it lasts!

Download app now (or) Scan the QR code

*Offer eligible for first 3 orders ordered through app!

callback request mobile
Have any Query?