M.Tech

You have to appear for GATE exam, then you will get a better college in your stream.

SGITS - Indore is the best.

Hello Prabhath,
It totally depends on your field of interest. If you are no more interested in technical field, then please proceed with MBA or else you can choose M.Tech
A small suggestion from my side : In reality, post graduate technical courses are not given that much importance in India.
If you are interested in doing Masters in technical program, try to do it abroad. You get exposed to the real world and you will be paid more as well .
Also, if you wish to study MBA in India, then I would suggest you to crack CAT and get into IIM's.
All the best!

Both, M.Sc. and ME have research based and course based program. ME will contain more hardware papers whereas M.Sc. will concentrate more on SW. After M.Sc., you can go for PhD. Length of both the courses is 2 yrs.

Indian Institute of Science, Bangalore, India
IIT Gandhinagar
IIT Guwahati
IIT Kanpur
IIT Hyderabad
These are some institutes in India which provide M.Tech in Signal Processing domain.

Why not? If you meet the requirements you can. See that you have good academic grades and take the IELTS or TOEFL. You must contact the college for admissions in MS as your visa will be valid only for four years initially. You can also look for integrated options or pathway programs.

According to me MBA has much more and better job prospects as compared to M.Tech. After pursuing MBA, you can apply for government jobs as well.