Invention Application
- Patent Title: FREQUENCY-DOMAIN TRANSMITTERS AND RECEIVERS WHICH ADAPT TO DIFFERENT SUBCARRIER SPACING CONFIGURATIONS
-
Application No.: US16608350Application Date: 2017-04-28
-
Publication No.: US20200169440A1Publication Date: 2020-05-28
- Inventor: Timothy A. THOMAS , Dennis OGBE , Kiran VENUGOPAL , Amitabha GHOSH
- Applicant: NOKIA TECHNOLOGIES OY
- International Application: PCT/US2017/030141 WO 20170428
- Main IPC: H04L27/26
- IPC: H04L27/26 ; H04W72/04

Abstract:
5G, New Radio (NR), numerology, receiver issues. The numerology scheme here consists in keeping the bandwidth constant but varying the subcarrier spacing (ie different tone spacing B for data and K*B for control channels), and correspondingly the symbol duration. Control symbols have a wider subcarrier separation but smaller symbol duration (In the case of beamforming reference signals, it would enable to train K beams in one symbol time period). Receiver issues: Embodiment 1 uses different Rx chains for data and control channels with different FFT sizes (size differing by factor K). Embodiment 2 uses a common identical FFT size (the one of the data channel) for both control and data: For the control channel, either repeat each control symbol K times prior to FFT and performs down-sampling afterwards and repeat it for each control symbol, or performs joint processing and FFT for all K control symbols jointly by either time domain linear combination or post FFT frequency processing.
Public/Granted literature
- US10917278B2 Frequency-domain transmitters and receivers which adapt to different subcarrier spacing configurations Public/Granted day:2021-02-09
Information query