A dictionary at least partially spans a set of discrete q-length signals. In one implementation, substantially non-overlapping antenna pattern diversity is used to provide a degree of sectorization in computing the estimated location of a wireless node. The separating plates include two or more separating plates installed along a direction perpendicular to the transfer paper conveying direction. The third planetary gear set has seventh, eighth, and ninth operational elements that occupy sequential positions in the lever diagram. The pin sleeve includes a conduit between the first end and the second end. The first detector is located in a position where the wavelength variation of the transmitted light from the Etalon is relatively small, while the second detector is located in a position where the wavelength variation of the transmitted light is relatively large.