公开(公告)号：US20250007545A1

公开(公告)日：2025-01-02

申请号：US18709577

申请日：2021-11-30

Applicant: NOKIA SOLUTIONS AND NETWORKS OY

Inventor： Long CHEN ,  Shavantha KULARATNA ,  Aki Heikki Jalmari KORHONEN

IPC: H04B1/04

Abstract: Disclosed are methods and apparatus for optimizing digital pre-distortion associated with a network device. The digital signal processing apparatus in a communication network may comprise at least one processor and at least one memory having computer program code stored thereon and configured, with the at least one processor, cause the digital signal processing apparatus as a network device to perform: splitting an input signal into two or more split signals with different frequencies, the frequency of each of said split signals being different from other said split signals; separating each of the two or more split signals into two or more component signals with different phases; and performing pre-distortion computation by using the component signals to get a pre-distorted signal to be transmitted to a power amplifier.

公开(公告)号：US20210058165A1

公开(公告)日：2021-02-25

申请号：US17043901

申请日：2018-04-08

Applicant: Nokia Solutions and Networks Oy

Inventor： Shen SONG ,  Long CHEN ,  Jianjiang YANG

IPC: H04B15/04 ,  H04B1/04

Abstract: Embodiments of the present disclosure relate to a device, method and computer readable storage medium for wireless data transmission. In example embodiments, the device includes a first NCO configured to shift a frequency of a pre-distorted downlink baseband signal by a first offset to generate a first signal. The baseband signal is associated with a plurality of allocated carriers. The device also includes an RF processing unit including an LO configured to generate an LO signal at an LO frequency. The LO frequency is within a protection area of one of the plurality of allocated carriers or equal to a center frequency of the one of the plurality of allocated carriers. The device also includes a power amplifier configured to generate, based on a modulated baseband signal, an amplified signal for transmission. The device also includes a second NCO configured to shift a frequency of the amplified signal by a second offset to generate a second signal for generation of a pre-distortion coefficient.