Cellular Transmission 

 March 2, 2021

By  Kadeeja Tamanna


In this blog, we will study signal generation, which occurs during the cellular transmission of 10 different users using MATLAB Coding. The signal modulation scheme used for Cellular transmission is known as Direct Sequence Spread Spectrum with Binary Phase Shift Keying using PN Sequence. We will study how encoding takes place in cellular transmission and how it can help various applications such as call tapping, location detection of a user, encryption, etc. 

Important Keywords 

1. Cell: A cell is a region or an area that consists of a base station used by all the users for wireless mobile-based communication.  

2. BPSK: BPSK or Binary Phase Shift Keying is a two-phase modulation scheme used in Cellular Transmission. The block diagram and output waveform of BPSK Modulation is shown in the figure below: 
BPSK Blockdiagram

3. PN Sequence: Pseudo-Noise (PN) sequences are used in DSSS modulation to introduce white noise as well as encrypt the data sequence. 

G= 1+x_{1}^{a}+x_{2}^{b}+\cdots+x_{n}^{z} 

where, G is Generator Polynomial. 


In Cellular transmission, the signal generation that occurs is known as Direct Sequence Spread Spectrum (DSSS). The steps to generate a DSSS transmission signal are as follows: 

1. Firstly the analog “message” is converted into binary form in the form of a sequence of bits with value 0 or 1. 

2. Then the message bits are encrypted with the cell code(i.e., the area/location code) 

3. The resultant binary sequence is converted into a square wave and superimposed with a carrier wave to generate a BPSK signal. 

4. The BPSK signal is then superimposed with a PN Sequence to finally generate DSSS Waveform. 

DSSS Transmission


Cellular Transmission Signals generated from one user

Signals generated from one user 

Cellular Transmission DSSS Signal (Sampled) of one user

DSSS Signal (Sampled) of one user 


Study of DSSS Scheme is helpful in various fields such as: 

  • Digital Encryption and Decryption 
  • Cellular Tapping 
  • Location Tracking 
  • Data Alteration  
  • Military and Defiance  


In this blog, we learned the implementation and signal analysis of DSSS Signals generated during Cellular Transmission using MATLAB Coding. We studied the role of each type of encryption used in each step of modulation and how it can help implement different applications. 

Did you find some helpful content from our video or article and now looking for its code, model, or application? You can purchase the specific Title, if available, and instantly get the download link.

Thank you for reading this blog. Do share this blog if you found it helpful. If you have any queries, post them in the comments or contact us by emailing your questions to [email protected]. Follow us on LinkedIn Facebook, and Subscribe to our YouTube Channel. If you find any bug or error on this or any other page on our website, please inform us & we will correct it.

If you are looking for free help, you can post your comment below & wait for any community member to respond, which is not guaranteed. You can book Expert Help, a paid service, and get assistance in your requirement. If your timeline allows, we recommend you book the Research Assistance plan. If you want to get trained in MATLAB or Simulink, you may join one of our training modules. 

If you are ready for the paid service, share your requirement with necessary attachments & inform us about any Service preference along with the timeline. Once evaluated, we will revert to you with more details and the next suggested step.

Education is our future. MATLAB is our feature. Happy MATLABing!

About the author 

Kadeeja Tamanna

An engineering graduate, who is passionate to employ her knowledge and skills, in developing and providing solutions to technological requirements in the healthcare domain. Proficient in signal processing, data analysis, statistical analysis, computational modeling using MATLAB programming. Currently a MATLAB Developer intern at MATLAB Helper ®.

  • Nikita Mahoviya says:

    Quite a detailed explanation with great visual effects!!

  • {"email":"Email address invalid","url":"Website address invalid","required":"Required field missing"}

    MATLAB Helper ®

    Follow: YouTube Channel, LinkedIn Company, Facebook Page, Instagram Page

    Join Community of MATLAB Enthusiasts: Facebook Group, Telegram, LinkedIn Group

    Use Website Chat or WhatsApp at +91-8104622179