Patent ID: 8509326
Filing Date: 2013-08-13
Classification: H04L

Abstract:
1. A transmitter for transmitting OFDM signal, comprising: a space-time or space frequency encoder configured to generate coded OFDM symbols by arranging a sequence of OFDM symbols or variants thereof in a predetermined space-time or space-frequency block matrix or a portion thereof according to a delay tolerant code, a frequency selector configured to select a particular OFDM carrier frequency out of a number of available OFDM carrier frequencies, and a signal generator configured to generate OFDM signals by applying the selected OFDM carrier frequency to the coded OFDM symbols; a first transmission unit comprising a first space-time or space-frequency encoder configured to generate first coded OFDM symbols by arranging the OFDM symbols of the sequence or variants thereof in a first portion of the predetermined space-time or space-frequency block matrix, a first signal generator configured to generate first coded OFDM signals by applying the selected OFDM carrier frequency to the first coded OFDM symbols, and at least one transmission antenna configured to transmit the first coded OFDM signals, and a second transmission unit spatially separated from the first transmission unit, the second transmission unit comprising a reception antenna configured to receive the first coded OFDM signals, a second space-time or space-frequency encoder configured to generate second coded OFDM symbols by arranging the OFDM symbols of the sequence or variants thereof in a second portion of the predetermined space-time or space-frequency block matrix, a second signal generator configured to generate second coded OFDM signals by applying the selected OFDM carrier frequency to the second coded OFDM symbols, and at least one transmission antenna to transmit the second coded OFDM signals.