Patent ID: 8488695
Filing Date: 2013-07-16
Classification: H04L

Abstract:
1. A receiving apparatus for receiving an orthogonal frequency division multiplexing (OFDM) signal, each frame of the OFDM signal having a frame length and a plurality of patterns, the apparatus comprising: a processor including: an acquiring unit that acquires information regarding a preamble signal from the OFDM signal, which is transmitted from a transmitting apparatus in accordance with an OFDM system; a frame determining unit that determines whether or not the frame length of the OFDM signal is short frame based on the information regarding the preamble signal acquired from said acquiring unit; and a time interpolating unit that obtains transmission path characteristics by comparing a pilot in the preamble signal with a previously determined pilot corresponding to said pilot in the preamble signal, when said frame determining unit determines that the frame length is short frame, and that interpolates a data portion in a time direction based on the obtained transmission path characteristics, wherein the short frame is a frame in which a number of symbols in the frame, except for preamble signals existing before said preamble signal in terms of time, is less than an interval of symbols in a same carrier of a discrete pilot arranged in the data portion.