Mobile and Wireless Networks Notes And Book By William Stallings

Lecture No 1

What is wireless communication?

WC is a standout amongst the most energetic territories of correspondence field today. While it has been a point of study since 1960s yet the most recent decade has seen a surge of research exercises around there. This is because of impact of a few elements

To begin with there has been a touchy increment sought after of tetherless availability,essentially by cell communication however expected by remote information applications.

Second the sensational advance in VLSI innovation has empowered execution of proficient flag preparing calculations and coding methods.

Lecture No 1.1

Electromagnetic Signal:-

is a function of time
can also be expressed as a function of frequency
Signal consists of components of different frequencies

Lecture No 2

What Is Attenuation?

1)Attenuation means loss of energy
2)Some of electrical energy is converted to heat

Lecture No 3

What is Multiplexing?

Multiplexing Set of techniques that allows the simultaneous transmission of multiple signals across a single data link.

Lecture No 4

Types of Errors:-

What is Single-Bit Error?

Only one bit of a given data unit is changed

What is Burst Error?

1)Two or more bits in the data unit are changed
2)Most likely to happen in a serial transmission

What is Redundancy Error?

Redundancy means adding extra bits for detecting errors at the destination

Lecture No 4.1

Longitudinal Redundancy Check

Lecture No 4.2

Modulo-2 Division in a CRC Generator

Lecture No 5