Reference no: EM131267447
A multipath fading channel has a multipath spread of Tm = 1 s and a Doppler spread Bd = 0.01 Hz. The total channel bandwidth at band pass available for signal transmission is W = 5 Hz. To reduce the effects of inter symbol interference, the signal designer selects a pulse duration T = 10 s.
a. Determine the coherence bandwidth and the coherence time.
b. Is the channel frequency selective? Explain.
c. Is the channel fading slowly or rapidly? Explain.
d. Suppose that the channel is used to transmit binary data via (antipodal) coherently detected PSK in a frequency diversity mode. Explain how you would use the available channel bandwidth to obtain frequency diversity and determine how much diversity is available.
e. For the case in (d), what is the approximate SNR required per diversity to achieve an error probability of 10-6?
f. Suppose that a wideband signal is used for transmission and a RAKE-type receiver is used for demodulation. How many taps would you use in the RAKE receiver?
g. Explain whether or not the RAKE receiver can be implemented as a coherent receiver with maximal ratio combining.
h. If binary orthogonal signals are used for the wideband signal with square-law post detection combining in the RAKE receiver, what is the approximate SNR required to achieve an error probability of 10-6? (Assume that all taps have the same SNR.)
Find the error probability for an fh spread spectrum signal
: Repeat Problem 12.19 when fast frequency hopping is performed with L hops per coded bit and the decoder is a hard-decision Viterbi decoder. The L chips per coded bit are square-law-detected and combined prior to the hard decision.
|
Compare and contrast distance-vector and link state routing
: Routing and Switching Selection Criteria. Please respond to the following: Compare and contrast distance-vector and link state routing, and analyze the limitations that would prevent the usage of each.
|
How the definition of strategy fits
: Define strategy and examine how the definition of strategy fits your chosen company and its situation. Support your response - Summarize the main strategies that your chosen company's management took leading up to this company's recent development.
|
What is the company vision statement
: Write a 350- to 700-word paper in which you address the following: What is the company's mission statement? What is the company's vision statement? What role do these have on the way the business operates
|
Determine the coherence bandwidth and the coherence time
: Suppose that the channel is used to transmit binary data via (antipodal) coherently detected PSK in a frequency diversity mode. Explain how you would use the available channel bandwidth to obtain frequency diversity and determine how much diversit..
|
Write a code to execute any type of query in jdbc
: The announcement.Execute() method makes it possible for us to execute any variety of question like opt for, update. It returns boolean. If the return price is right, then it performed decide upon question, get the ResultSet object and read the res..
|
Design high-level logical system characteristics
: Design high-level logical system characteristics (user interface design, design of data and information requirements). Develop clear and concise business requirements documents and convert them into technical specifications. Use technology and inform..
|
Should abm maximize its profits
: What does the result of your calculation tell you about the correlation between the price and the quality of the canned vegetable or fruit you selected?
|
Analyze role of innovation in executing change strategies
: Create a 1,400-word report using MS Word analyzing the relationship between these concepts or topics: Analyze the role of innovation in executing change strategies. Assess managing diversity in the workplace
|