CPC H04L 27/2615 (2013.01) [H04B 7/0456 (2013.01)] | 19 Claims |
1. A method of operation of a Multiple Input Multiple Output, MIMO, Orthogonal Division Multiplexing, OFDM, transmitter system, comprising:
for each carrier of two or more carriers, performing precoding of a plurality of frequency-domain input signals for the carrier to provide a plurality of frequency-domain precoded signals for the carrier, the plurality of frequency-domain input signals for the carrier being for a plurality of transmit layers for the carrier, respectively; and
processing the two or more pluralities of frequency-domain precoded signals for the two or more carriers, respectively, in accordance with a multi-carrier processing scheme to provide a plurality of multi-carrier time-domain transmit signals for a plurality of antenna branches, respectively, of the MIMO OFDM transmitter system, the multi-carrier processing scheme providing Peak-to-Average Power Ratio, PAPR, reduction for Cyclic Prefixes, CPs, of the plurality of multi-carrier time-domain transmit signals for the plurality of antenna branches;
wherein processing the two or more pluralities of frequency-domain precoded signals for the two or more carriers, respectively, in accordance with the multi-carrier processing scheme, comprises:
performing, in a forward direction, CP insertion within each iteration of the multi-carrier processing scheme; and
performing, in a reverse direction, CP removal, wherein, in order to perform CP removal, the processing circuitry is further operable to, for each symbol:
combining a first-CP portion of the symbol that corresponds to the CP and a second-CP portion of the symbol that corresponds to samples from which the CP was derived into a new second-CP portion of the symbol; and
remove the first-CP portion of the symbol.
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