5 An Indoor Radio Is Used To To Broadcast A Signal With A Bandwidth Of 200 Khz In A Office Building With Multiple Floor 1 (44.14 KiB) Viewed 59 times
5. An indoor radio is used to to broadcast a signal with a bandwidth of 200 kHz in a office building with multiple floors, assume a path loss exponent of 4. The radio uses FM with a modulation index of B=2. For adequate performance a post detection signal-to-noise ratio of 30 dB is required. The radio oper- ates at 50 MHz. Assume isotropic transmit and receive antennas. An inexpensive receiver is used that has a noise figure of 9dB. Assume an antenna temperature of 100°K. Assume the maximum distance between the transmitter and receiver is 500m. a. 10 pts What is the processing gain in dB? b. 10 pts Find the required transmit power in dBm.
1. Assume that 3 analog signals have a bandwidth of 500 kHz. Find the RF bandwidth for each of the following multiplexing schemes. Assume Nyquist sampling. Clearly state any assumptions. 3 pts each O Multiplexing Technique Composite Baseband Maincarrier RF Signal Generated Modulation Bandwidth using in MHz Modulation a FDM SSB D b FDM None (Direct to RF) DSB - SC None (Direct to RF) SSB с FDM DSB - SC d DSB - SC = FDM FDM ローロ (D e FM B = 0.2 FM B = 3 SSB DSB - SC = f TDM / PAM None (Direct to RF) None (Direct to RF) SSB None (Direct to RF) SSB ) g TDM / PCM y = 8 bits / sample (no pulse shaping) h TDM / PCM y = 8 bits / sample = 8 (raised cosine x pulse shaping with a = 1)
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