System and method for common phase error and inter-carrier interference estimation and compensation

Patent metadata

Field	Value
Publication number	US-10868644-B2
Application number	US-201916403926-A
Country	US
Kind code	B2
Filing date	May 6, 2019
Priority date	Aug 3, 2017
Publication date	Dec 15, 2020
Grant date	Dec 15, 2020

Abstract

A system and method for transmitting an orthogonal frequency-division multiplexed signal with a group distributed phase tracking reference signal subcarrier structure, and for estimating, and compensating for, both common phase error, and inter-carrier interference.

First claim

What is claimed is:

1. A method, comprising:
estimating one or more inter-carrier interference terms, including:
canceling, from a received signal, an estimated common phase error to form a first compensated received signal; and
estimating a first inter-carrier interference term as an output of a function, an input of the function comprising the first compensated received signal.

2. The method of claim 1 , further comprising calculating a value of a transmitted signal, corresponding to the received signal, in a subcarrier using known phase tracking reference signal (PTRS) pilots.

3. The method of claim 1 , wherein the estimating of the inter-carrier interference terms further comprises:
iteratively, for a range of values of an integer i greater than 1 and less than a set integer L:
canceling, from the received signal, the estimated common phase error, and the first through (i−1)-th inter-carrier interference terms, to form an i-th compensated received signal; and
estimating, using the i-th compensated received signal, an i-th inter-carrier interference term.

4. The method of claim 3 , further comprising estimating the common phase error using an estimated channel and phase tracking reference signal subcarriers from the received signal,
wherein the phase tracking reference signal subcarriers comprise N c N PTRS subcarriers, arranged in N c groups, each of the N c groups comprising N PTRS adjacent subcarriers, N PTRS being an integer greater than 1, and N c being an integer greater than 1.

5. The method of claim 4 , further comprising estimating a channel using demodulation reference signal subcarriers from the received signal,
wherein the canceling, from the received signal, the estimated common phase error, and the first through (i−1)-th inter-carrier interference terms, to form the i-th compensated received signal, comprises calculating the i-th compensated received signal Y SIC [κ ii ] according to

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Assignees

• Samsung Electronics Co Ltd

Inventors

• Maleki Hamed
• Dayal Pranav
• Song Kee-Bong

Classifications

• H04L25/03821 Primary

  Inter-carrier interference cancellation [ICI] · CPC title

• H04L25/0224

  using sounding signals · CPC title

• H04L27/2691 Primary

  involving interference determination or cancellation · CPC title

• H04L5/12

  the signals being represented by different phase modulations of a single carrier · CPC title

• H04L5/005

  of common pilots, i.e. pilots destined for multiple users or terminals · CPC title