Adaptive Time Diversity And Spatial Diversity For OFDM

A receiver structure for use with multiple input multiple output (“MIMO”) signals, wherein the receiver structure is configured to receive a signal, the receiver structure comprising:

• a decoder configured to decode the signal;
• and
• a controller configured to make a determination, in response to the decoded signal, as to whether subsequent MIMO signals should be transmitted using space time diversity or spatial multiplexing and generate a feedback signal indicative of the determination.

A transmitter structure for use with multiple input multiple output (“MIMO”) signals, comprising:

• a controller configured to generate initial MIMO signals, receive a feedback signal from a receive structure and based on the feedback signal, generate subsequent MIMO signals using space time diversity or spatial multiplexing;
• and
• a plurality of transmitters configured to transmit the initial MIMO signals and the subsequent MIMO signals.