Abstract
A method and apparatus for radio resources control in a multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) communication system are disclosed. Channel metric is calculated for each of a plurality of transmit antennas. Sub-carriers are allocated to each transmit antenna in accordance with the channel metric of each transmit antenna. Signals are transmitted using the allocated sub-carriers at each antenna. Adaptive modulation and coding and transmit power control of each sub-carrier may be further implemented in accordance with the channel metric. Power control may be implemented per antenna basis or per sub-carrier basis. In performing power control a subset of transmit antennas may be selected and waterpouring may be applied only to the selected antennas. Waterpouring may be based on SNR instead of channel response. 7/10 SUBCARRIER 120 100 104 112 GENERATION UNIT 108 11410 AMC SUBCARRIER -- l 102 UNIT MODULATION UNIT X USER DATA AMC SUBCARRIER STREA TO UNIT MODULATIONUNIT -M CONVERTER --- ANTENNAS AMC SUBCARRIER UINIT MODULATION UNIT10 110- FIG. 12 NTOLRESTIMATOR P1 wP3 AM CO3 AMC2 -Y P2- P3 P4 AMC4 W SUBCARRIER LEVEL GRANULARITY INSTEAD OF AVERAGE CHANNEL POWER! FIG. 13
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| 4G | 21/12/2016 | ISLD-201706-014 | INTERDIGITAL INC |
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| Not Available | 21/12/2016 | ISLD-201706-014 | INTERDIGITAL INC |
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| 4G | 30/12/2019 | ISLD-201912-087 | INTERDIGITAL INC |
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