Patent ID: 8630160
Filing Date: 2014-01-14
Classification: H04B,H04L

Abstract:
1. An apparatus used for an Orthogonal Frequency Division Multiple Access (OFDMA) wireless communication system, the apparatus comprising: multiple antennas for transmitting one or more basic units, wherein each basic unit includes four subcarriers by six OFDMA symbols and contains a plurality of pilot and data resource elements (REs); and a processor for configuring the basic units, wherein, for a single-stream transmission, the pilot and data REs are configured in the basic unit as shown in Table 1, which configures the pilot REs in the basic unit at intervals of 3 subcarriers in a frequency axis and at intervals of 1 or 4 OFDMA symbols in a time axis, and wherein, for two-stream transmission, the pilot and data REs are configured in the basic unit as shown in Table 2, which configures the pilot REs in the basic unit at intervals of 3 subcarriers in a frequency axis and at intervals of 5 OFDMA symbols in a time axis: where “P” indicates a pilot RE for the single stream, “Pa” indicates a pilot RE for a first stream, “Pb” indicates a pilot RE for a second stream, and “-” indicates a data RE.