Patent ID: 8325594
Filing Date: 2012-12-04
Classification: H04L

Abstract:
1. An apparatus for transmitting an uplink pilot in a frequency division multiple access system, the apparatus comprising: a bit-to-constellation mapper for generating data symbols; a pilot sequence generator for generating pilot symbols; a selector for selecting the data symbols in data symbol intervals of one time slot including the data symbol intervals and inconsecutive first and second pilot symbol intervals, which have a shorter length than the data symbol intervals, and selecting the pilot symbols in the first pilot symbol interval and the second pilot symbol interval; and a mapper for mapping the data symbols to frequency elements given for data transmission in the data symbol intervals before transmission, mapping the pilot symbols to a first set of frequency elements in the first pilot symbol interval before transmission, and mapping the pilot symbols to a second set of frequency elements in the second pilot symbol interval before transmission, wherein a length of each of the data symbol intervals, a length of the first pilot symbol interval, and a length of the second pilot symbol interval are determined according to a number of samples, and wherein a sample is a basic time unit constituting the data symbols and the pilot symbols.