How can I select really nice project ideas for undergrad research projects? I wanna do a challenging project at the end of each course I take in college and am interested in bigger projects with wider scope as well. But I'm unable to come up with good ideas. Where can I find research papers or sites to help me, given my limited knowledge as an undergraduate? I study Electronics &amp; Communication Engg. while I also take courses from CompSci.
If you want to do projects related to your courses, I wouldn't push towards recent literature.  It will be specialized and the emphasis will be on new ideas, not on implementation of your course learnings.

Instead I would look at the references in your texts (often older/harder books).  They may have harder exercises or have small design projects.  

Also, of course, talk to your teachers.