September 15, 1999 Page 5 of 13. 3 Sampling of band-pass signals. 3.1 Introduction. The Nyquist sampling theorem states that to get a unique representation of the frequency. content of a signal, the signal must be sampled at a rate twice the frequency of the highest. frequency component of the signal.
A quarter section, often shortened to quarter, is an area of one-fourth of a square mile, or 160 acres (0.65 km2). It was a common size of a tract under Homestead Acts in the United States and the Dominion Land Survey in Canada.
If the square mile is divided into quarters, each quarter has a side length of 1 â 2 mile (880 yards) and is 1 â 4 square mile in area, or 160 acres. These subunits would typically then again be divided into quarters, with each side being 1 â 4 mile long, and being 1 â 16 of a square mile in area, or 40 acres.