Design of ZC Sequence, Scrambler and Modulation Modules for 5G Uplink Modem

Abstract

An uplink modem in any communication device is responsible for transmission of data as well as control signals from the user equipment to the base station which is also called as eNodeB. The data signals before being transmitted by the Radio Frequency Integrated Circuits (RFIC) will undergo scrambling and modulation, whereas control signals such as Demodulation Reference Signals (DMRS) or Sounding Reference Signals (SRS) are generated using Zadoff Chu (ZC) Sequence generation module.

Scrambling is done to avoid burst errors, Modulation schemes which are being designed are Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK) and Quadrature Amplitude Modulation (QAM). ZC sequence is used in generation of reference signals in user equipment which is then transmitted to base station where the sequence is analyzed to estimate the channel quality and other parameters. In this paper ZC Sequence, Scrambler and Modulation modules are designed based on 5G specification standards set by 3rd Generation Partnership Project (3GPP) using Verilog HDL and synthesis is carried out to obtain area and power reports.