Reduction of out-of-band emitted power
AssigneeHuawei Technologies Co., Ltd.
InventorsJaap Van de Beek, Fredrik Berggren
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Abstract
OFDM signal transmission of reduced power emission outside a designated transmission bandwidth is disclosed. At least one subcarrier is allocated for an OFDM symbol for non-data. A weighting signal representation is determined based on an initial error signal representation, which is determined from at least part of a first OFDM symbol and part of a second OFDM symbol, the first and second OFDM symbols being consecutive in time.
Claims18
A method of OFDM (Orthogonal Frequency Division Multiplex) signal transmission, said method comprising:
- for at least a first one of a plurality of OFDM symbols and a first set of data subcarriers:
- allocating at least one subcarrier for non-data,
- determining a representation of a weighting signal for a predetermined level of signal continuity over time based on a representation of an initial error signal, said representation of an initial error signal being determined from at least part of said first one of a plurality of OFDM symbols and at least part of a second one of said plurality of OFDM symbols, and
- modulating the at least one non-data subcarrier according to said representation of said weighting signal, wherein
- the first one and the second one of said plurality of OFDM symbols are time-consecutive, and
- the OFDM signal transmission comprises modulated at least one carrier from the set of data subcarriers and the modulated said at least one non-data subcarrier.
Computer program product comprising an OFDM (Orthogonal Frequency Division Multiplex) signal transmission program stored in a non-transitory computer readable medium, which when run in a computer causes the computer to:
- for at least a first one of a plurality of OFDM symbols and a first set of data subcarriers:
- allocate at least one subcarrier for non-data,
- determine a representation of a weighting signal for a predetermined level of signal continuity over time based on a representation of an initial error signal, said representation of an initial error signal being determined from at least part of said first one of a plurality of OFDM symbols and at least part of a second one of said plurality of OFDM symbols, and
- modulate the at least one non-data subcarrier according to said representation of said weighting signal, wherein
- the first one and the second one of said plurality of OFDM symbols are time-consecutive, and
- the OFDM signal transmission comprises modulated at least one carrier from the set of data subcarriers and the modulated said at least one non-data subcarrier.
Dependencies are inferred from the claim text.