Communication Concepts: Circuit Designer Perspective

What does GSM stand for? Why is the dynamic range in a digital enhanced cordless telecommunication receiver specified to be around 93 dB? What are multipath fading and Doppler shifts? How would the noise figure requirement of a low-noise amplifier change if I change my radio from one standard (DECT) to another (GSM)? Would Doppler shift be a problem in a standard such as PHS, and what circuit techniques do I have to address this problem?