Chapter 10, Problem 5RP

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Q1 [2 point] Perform 13+10 in the following Adder- Subtractor: A= |B= A3 B3 IB2 B1 A0 BO FAH FAH FAH FA M CO Q2 [2 point] Perform 13-10 in the following Adder- Subtractor: A= B= A3 B3 A2 B2 A1 B1 A0 BO A = = BC= AB FA FA FA FA M CO

Matlab Homework (20ps) A BFSK signal is transmitted through a channel with AWGN. Generate similar BFSK received signal plots as shown on next page. (20 pts) BFSK for eb-1 and npower=0.01 with 500 samples BFSK for eb=1 and npower=0.1 with 500 samples 2.5 2.5 2 1.5 1 0.5 0 -0.5 -1 2 1.5 1 0.5 0 0.5 -1 -1.5 1.5 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5 -1.5 -1 -0.5 0 0.5 1 1.5 2 2.5

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1. You are to design a 9-volt battery operated baseband PAM communication system that must last great than 10 years without replacing the batteries. The application requires a BER of <10^-4 and a data rate of 200bps. The channel can be modeled as AWGN with a noise power spectral density of 10^-9 W/Hz and a channel loss of 10 dB. (a) Estimate the required capacity of the batteries. (The battery life (hours) is equal to the battery volts times of the battery capacity (Amps* hours) divided by the total load (Watts)) and (b) Can you easily find this battery? If not, what would you suggest be done?

3. You are on a design team tasked to design a system of remote sensors that use PAM. Here is what the team knows/assumptions: The remote sensor will use a single AA battery required to power the sensors. The system has a bandwidth of 2KHz and requires a data rate of 12 Kbps and a BER of less than 1*10^-4. The typical channel has maximum losses of 35 dB and a noise power spectral density is 10^-9 W/Hz. Your boss assigns you with the task of estimating how long the battery will last.