Patent ID: 6940828

Claim:
Apparatus for a communication system having a sending station that utilizes OFDM (Orthogonal Frequency Duplex Multiplexing) techniques to communicate data, the data formatted into successive data vectors, said apparatus for facilitating formation of an OFDM (Orthogonal Frequency Division Multiplexing) symbol, said apparatus comprising: an inverse discrete trigonometric transformer formed of both an inverse discrete cosine transformer and an inverse discrete sine transformer, the inverse discrete cosine transformer coupled to receive a first portion of each of the successive ones of the data vectors into which the data to be sent by the sending station is formatted, and the inverse discrete sine transformer coupled to receive a second portion of each of the successive ones of the data vectors; said inverse discrete trigonometric transformed for transforming values of the successive ones of the data vectors into inverse-transformed form, as transformed values, the transformed values used to form OFDM symbols.