Methods and apparatus for multi-carrier communication systems with automatic repeat request (ARQ)

摘要

Hybrid ARQ is employed in a multi-carrier communication system for retransmission of erroneous packets by taking advantage of time/frequency/space diversity and by combining ARQ functions at physical layer and MAC layers, making the multi-carrier system more robust in a high packet-error environment.

主权项

1. A method for a transmitter in a communication system, the method comprising:
allocating first and second subchannels for signal transmissions to a receiver in the communication system, the subchannels containing Orthogonal Frequency Division Multiplexing (OFDM) subcarriers; transmitting, at a first transmission time, a first data packet over the first subchannel and a second data packet over the second subchannel; receiving a signal from the receiver indicating an error in the first data packet received by the receiver; and transmitting, at a second transmission time, a redundancy version of the first data packet over the second subchannel and a third data packet originally scheduled for the second subchannel over the first subchannel, wherein the first subchannel and second subchannels have different spatial configurations.