The Institution of Engineers (IE) India Students Chapter and Electronics and Communication Engineering Association (ECEA) organized a guest lecture on 30th of August on the topic "Physical Layer Aspects of Wireless Communication".

The Chief Guest was Dr.S.J.Thiruvengadam, Professor, Thiagarajar College of Engineering. The Lecture began with the introduction on challenges in wireless communication system design, like limited availability of RF spectrum, requirement of higher data rates, energy efficiency, multipath fading and the various methods to overcome these challenges were discussed. A brief explanation about the different types of communication systems like SISO (Single Input Single Output), SIMO (Single Input Multiple Output), MISO (Multiple Input Single Output), MIMO (Multiple Input Multiple Output) and a detailed note of SISO system with digital modulation techniques were given. At the baseband level improving the SNR rate and increasing the signal power are the two ways to improve efficiency of transmission and it's found improving the SNR as effective method with an insight on saving transmission energy. Constellation diagram of different digital modulation techniques were also discussed.

The next session was Hands-on-Training with MATLABTM Software. The training was on the performance analysis of digital modulation schemes. The aim was to obtain the characteristic curve of SNR vs Bit Error Rate, which helps to make decision at the receiver end for PSK modulation. The same concept was extended for different types of digital modulation schemes. An idea about 4G (LTE) network, OFDM (Orthogonal Frequency division multiplexing) scheme, and 5G network based on NOMA (Non-Orthogonal Multiple access) were given. In addition, the need for NOMA was discussed. At the end of his speech, questions were put forward to him by the students. The students gave the feedback that guest lecture was very informative and laid a good foundation to Wireless Communication domain. The session concluded with his motivational speech and he insisted that Communication domain has lots of challenges that can be converted into opportunities.