Please do question 4.32

power. Be sure to consider all performance-versus-cost parameters. 4.32 Consider an 8-ary PAM system using rectangular pulses and transmitting 60,000 bits/sec. a. Determine the channel bandwidth required for 90% in-band power. b. What are the optimum amplitudes of the eight different symbols if average normal- ized transmitted power must be S15 volts?? c. Determine a Gray code to assign three-bit sequences to each of the eight different symbols. d. Extending the concepts used to determine the probability of symbol error for a quaternary (4-ary) PAM system, determine the probability of symbol error for an 8-ary PAM system. e. Suppose the channel attenuates the signal so that only 50% of the transmitted signal's power arrives at the receiver. The two-sided average normalized power spectral density of the noise at the receiver is 5 x 10 volts/Hz. If a correlation receiver with seven thresholds is employed, determine the probability of symbol error. f. Translate your results in Part e into a probability of bit error, assuming that the Gray code from Part c is used and that all errors are to adjacent symbols. 8. Suppose that the assumption that all errors occur to adjacent symbols is not valid. Translate your results in Part e to probability of bit error, assuming that errors to all symbols are equally likely h. Explain how you can use the values you obtained in Parts f and g to evaluate a system where many, but not all, errors occur to adjacent symbols. 431 and the s-ary