Modification of input signals at least with weights to create a desired error vector magnitude or clipping noise distribution for transmission

A method comprising:

• receiving a first signal, wherein the first signal comprises one or more carrier signals for transmission, each carrier signal comprising a plurality of resource blocks, wherein each resource block is assigned to a unique frequency and time slot of the respective carrier signal;
• generating a second signal by modifying said first signal, wherein the second signal is a clipping pulse signal;
• converting the second signal into a plurality of narrowband signals, wherein each narrowband signal is a frequency slice of the second signal;
• modifying the plurality of narrowband signals to generate a plurality of modified narrowband signals, wherein said modifying is controlled based on multiplying individual ones of a plurality of filter weights with corresponding individual narrowband signals, the filter weights defining a level of noise to be added to the respective narrowband signals in accordance with a desired error vector magnitude distribution or clipping noise distribution;
• combining the plurality of modified narrowband signals into a third signal;
• and
• generating a fourth signal suitable for transmission based on a combination of the first signal and the third signal.

An apparatus comprising one or more means for:

• receiving a first signal, wherein the first signal comprises one or more carrier signals for transmission, each carrier signal comprising a plurality of resource blocks, wherein each resource block is assigned to a unique frequency and time slot of the respective carrier signal;
• generating a second signal by modifying said first signal, wherein the second signal is a clipping pulse signal;
• converting the second signal into a plurality of narrowband signals, wherein each narrowband signal is a frequency slice of the second signal;
• modifying the plurality of narrowband signals to generate a plurality of modified narrowband signals, wherein said modifying is controlled based on multiplying individual ones of a plurality of filter weights with corresponding individual narrowband signals, the filter weights defining a level of noise to be added to the respective narrowband signals in accordance with a desired error vector magnitude distribution or clipping noise distribution;
• combining the plurality of modified narrowband signals into a third signal;
• and
• generating a fourth signal suitable for transmission based on a combination of the first signal and the third signal.

A non-transitory computer-readable medium comprising program instructions stored thereon for performing at least the following:

• receiving a first signal, wherein the first signal comprises one or more carrier signals for transmission, each carrier signal comprising a plurality of resource blocks, wherein each resource block is assigned to a unique frequency and time slot of the respective carrier signal;
• generating a second signal by modifying said first signal, wherein the second signal is a clipping pulse signal;
• converting the second signal into a plurality of narrowband signals, wherein each narrowband signal is a frequency slice of the second signal;
• modifying the plurality of narrowband signals to generate a plurality of modified narrowband signals, wherein said modifying is controlled based on multiplying individual ones of a plurality of filter weights with corresponding individual narrowband signals, the filter weights defining a level of noise to be added to the respective narrowband signals in accordance with a desired error vector magnitude distribution or clipping noise distribution;
• combining the plurality of modified narrowband signals into a third signal;
• and
• generating a fourth signal suitable for transmission based on a combination of the first signal and the third signal.