hi,

students some times confuse about the difference between electronics and communication engineering and electronics and instrumentation engineering. the common topics of these two branches are circuit theory, control system, analog and digital electronics, electromagnetic field theory,  engineering mathematics etc.

the major topics of ece is communication engineering, rf and microwave engineering.

the major topics of electronics and instrumentation engineering is Communication and Optical Instrumentation, Sensors and Industrial Instrumentation, Measurements .

so now you have got an idea about the core difference of these two streams.