CS698T Wireless Networks: Principles and Practice Topic 07 - PowerPoint PPT Presentation

CS698T Wireless Networks: Principles and Practice Topic 07 Multiplexing Techniques Bhaskaran Raman, Department of CSE, IIT Kanpur http://www.cse.iitk.ac.in/users/braman/courses/wless-spring2007/ Jan-Apr 2007 CS698T: “Wireless Networks: Principles & Practice”, Bhaskaran Raman, Dept. of CSE, IIT Kanpur Topic 07

Multiplexing Techniques ● Wireless channel is shared – May need to multiplex multiple users ● Four possibilities: – Space Division Multiplexing (SDM) – Time Division Multiplexing (TDM) – Frequency Division Multiplexing (FDM) – Code Division Multiplexing (CDM) ● Advanced, not necessary to know how it works for this course Jan-Apr 2007 CS698T: “Wireless Networks: Principles & Practice”, Bhaskaran Raman, Dept. of CSE, IIT Kanpur Topic 07

Source: Mobile Communications, Jochen Schiller Space Division Multiplexing Jan-Apr 2007 CS698T: “Wireless Networks: Principles & Practice”, Bhaskaran Raman, Dept. of CSE, IIT Kanpur Topic 07

Time Division Multiplexing ● Example: satellite links Source: Mobile Communications, Jochen Schiller Jan-Apr 2007 CS698T: “Wireless Networks: Principles & Practice”, Bhaskaran Raman, Dept. of CSE, IIT Kanpur Topic 07

Frequency Division Multiplexing Source: Mobile Communications, Jochen Schiller Jan-Apr 2007 CS698T: “Wireless Networks: Principles & Practice”, Bhaskaran Raman, Dept. of CSE, IIT Kanpur Topic 07

TDM + FDM Source: Mobile Communications, Jochen Schiller Jan-Apr 2007 CS698T: “Wireless Networks: Principles & Practice”, Bhaskaran Raman, Dept. of CSE, IIT Kanpur Topic 07

Code Division ● Akin to people at a party Multiplexing using different “languages” ● Advanced technique, further details Source: Mobile not necessary Communications, for this course Jochen Schiller Jan-Apr 2007 CS698T: “Wireless Networks: Principles & Practice”, Bhaskaran Raman, Dept. of CSE, IIT Kanpur Topic 07