When you no longer need a directory, you can use command ____ to remove it.
A. xtree
B. rmdir
C. dldir
D. deltree
Answer: B
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Matched processors for two orthogonal signals for multiple access.
The following worksheet specifies a pair of 10-sample CDMA orthogonal data signals: sA sub “1” in B5:B14 and sB sub “1” in C5:C14. Random transmitted bits DA sub “t” and DB sub “t” are computed in B1 and D1. The transmitted signal sAT sub “i” (in D5:D14) = sA sub “i” if DA sub “i” =1 and =-sA sub “i” if DA sub “i”=0. The transmitted signal sBT sub “i” (in E5:E14) = sB sub “i” if DB sub “t”=1 and =-sB sub “i” if DB sub “t”=0. The Gaussian noise sequence Ni SD ?N is specified in F1. The detected signal X sub “i” is computed in G5:G14. The matched processor component sA sub “i” X sub “i” is computed in H5:H14 and VA is computed in H16. The detected bit DA sub “r” is computed in B2 from VA. The matched processor component sB sub “i”X sub “i” is computed in I5:I14 and VB is computed in I16. The detected bit DB sub “r” is computed in D2 from VB.
The probability of error is estimated by computing the ratio of errors to transmitted data in L5 as the noise ? sub “N” varies from 0 in steps of ?? = (E sub“s”/2) to the power of 1/2 using E sub “s” computed in F2. The total number of data bits to be transmitted n sub “T” is specified in L2. The number of transmissions accomplished in shown in L3 – with 2 bits per transmission - and the number of errors in L4. Three VBA Macros are present:
• ResetMA resets the counts in L3 and L4.
• XmitMA increments the number of transmissions by two for each signal transmission and, if errors occur, increments the error count for each error.
• AutoMA computes the P[error] for nT transmissions as ?N varies and displays the results in K8:K16.
a. What is the formula in B1?
b. What is the formula in D1?
c. What is the formula in D2?
d. What is the formula in F2?
e. What is the formula in D10?
f. What is the formula in E10?
g. What is the formula in F10?
h. What is the formula in G10?
i. What is the formula in H10?
j. What is the formula in H16?
k. What is the formula in B2?
l. What is the formula in I10?
m. What is the formula in I16?
n. What is the formula in D2?
o. What is the formula in L1?
p. What is the formula in L4?
q. Compose ResetMA.
r. Compose XmitMA.
s. Compose AutoMA.
Steep-sloped roofs generally have a slope of ____ or higher.
A. 3:12 B. 4:12 C. 5:12 D. 7:12
Dan is working on his tractor. He has a set of wrenches. The 5/16-inch wrench he tried was a size too small. What size wrench should he use?
What will be an ideal response?
The ____ zone is the part of the ocean where sunlight penetrates the water enough to support photosynthesis
A) bathyal B) neritic C) euphotic D) abyssal