Cofdm transmitter with diversity and time delay

摘要

The transmission system utilizes transmit diversity over a first and at least one further coded OFDM channel in the same frequency band, where each channel after the first channel has a positive or negative time delay relative to the first channel. Digital filters (10, 10') in each channel (A, B) has different phase and magnitude responses in order to achieve the required time delay and provide different gain values is a function of frequency.