d. Explain how the following impairments affect the wireless signal: 1. Doppler shift, II. Doppler spread. e. Explain how implementing OFDM at the physical layer in LTE to achieve higher data rate...

Extracted text: d. Explain how the following impairments affect the wireless signal: 1. Doppler shift, II. Doppler spread. e. Explain how implementing OFDM at the physical layer in LTE to achieve higher data rate compared to 3G systems. f. One of the LLC layer services in the IEEE 802.11 protocol is "Unacknowledged connectionless service" Explain how it works and discuss one real life application that uses this service.