Methods for exchanging data in a communications system and apparatuses utilizing the same

摘要

A communication system is provided. A first communications device transmits at least one first message including predetermined bit sequences. A second communications device determines one or more antenna weighting vectors (AWVs) and one or more bitloading vectors (BLVs) by using the first message in accordance with a predetermined rule and transmits a second message including information pertinent to the AWVs and the BLVs to the first communications device. The first communications device further communicates with the second communications device about an AWV selected from the AWVs and the first and second communications devices apply the selected AWV to the corresponding antennas before exchanging data. The data includes a header carrying information pertinent to a BLV selected from the BLVs used to encode the data and a payload is transmitted to the second communications device. The second communications device decodes the data in accordance with the selected BLV.

主权项

1. A method for exchanging data between a first and a second communications devices comprising:
transmitting at least one first message comprising a plurality of predetermined bit sequences to the second communications device by the first communications device; receiving a second message comprising a plurality of antenna weighting vectors (AWVs) and a plurality of bitloading vectors (BLVs) from the second communications device, wherein the second communications device determines the plurality of AWVs and plurality of BLVs in accordance with a predetermined rule and wherein each element in one bitloading vector comprises one or more bits representing a modulation of one or more OFDM sub-carriers; communicating with the second communications device about an AWV selected by the first communications device from the plurality of AWVs, wherein the first and second communications devices apply the selected AWV to the corresponding antennas; and sending a first packet comprising a header and a payload to the second communications device, wherein the header carries information pertinent to a BLV selected from the plurality of BLVs and used to encode the first packet, wherein the second communications device decodes the first packet by using the selected BLV.