Patent ID: 6992973
Filing Date: 2006-01-31
Classification: H04L

Abstract:
1. A receiving apparatus for receiving a multi-carrier modulated signal to which a predetermined transmission path estimation is processed by a transmitting apparatus, comprising: an orthogonal transform circuit for orthogonally transforming a received signal, a transmission path estimation circuit for estimating a characteristic of a transmission path in response to a processing of an estimation of the transmission path carried out by said transmitting apparatus based on an output signal of said orthogonal transform circuit, and a data output circuit for correcting said received signal in response to a result of the estimation of said transmission path estimation circuit and outputting the received data, a deinterleave circuit for rearranging the data in an output signal from said data output circuit to restore the data to an original order, wherein said transmission path estimation circuit includes: a differential demodulation circuit for differentially demodulating the output signal of said orthogonal transform circuit at a predetermined time as a reference signal when said transmitting apparatus performs the differential modulation, and a transmission path equalization circuit for extracting a pilot signal from the output signal of said orthogonal transform circuit when adding the pilot signal to the transmission data by said transmitting apparatus and estimating characteristics of the transmission path in response to the extracted pilot signal.