NOMA

   Design a basic OFDM system utilizing an IFFT as the OFDM modulator and an FFT as the OFDM demodulator. I am showing you a figure by which we can under the basic fundamentals of OFDM. OFDM Modulation with IFFT Step-1 Firstly, define the number of bits. it will be in the power of 2.  which means the QAM signal's length is also a power of 2. The  ifft  and  fft  functions are significantly faster for signals of certain lengths, including those whose length is a power of 2. Syntax-   numBits = 32768; Step-2 Define the modulation order Syntax-  modOrder = 16; % for 16-QAM Step-3 Generate the random signal Syntax-  srcBits = randi([0,1],numBits,1); Step-4 Modulate the Signal (Here we are doing QAM Modulation) Syntax-  qamModOut = qammod(srcBits,modOrder, "InputType" , "bit" , "UnitAveragePower" ,true); Step-5 Calculate the Inverse Fast Fourier Transform (IFFT) of the 16-QAM signal. Syntax- ofdmModOut = ifft(qamModOut) Addition of No...

 

 

 Answer:-  In an orthogonal multiple access (OMA) system, like TDMA and FDMA, orthogonal resource allocation is employed among users to avoid intra-cell (inter-user) interference. The number of supported users is constrained by the available orthogonal resources. In OMA, each user is assigned a fixed frequency band. However, in NOMA, all frequency bands can be utilized by each user, as illustrated in the figure above. NOMA allows and mitigate intra-cell interference in resource allocation of users. So, according to the Shannon Capacity Equation, C = B log 2 (1+S/N) The data rate is directly proportional to the bandwidth.  In NOMA, we get a large frequency band. So, we can improve the data rate with the help of NOMA.

 Answer- NOMA stands for non-orthogonal multiple access. It enables multiple users to share a single resource, thereby enhancing both user experience and the overall system throughput.

 You can use randi function to generate a signal.  For example:- We have to generate a column vector of random data. Syntax:-  x = randi ([0,1],number of bits, 1)  where the first input is a range of bits The second input is the number of rows The Third input is the number of columns