Control Channel Simple Estimation for Early Interference Cancellation

Solution Overview

Problem

In wireless communications systems, the extended time required for channel estimation leads to delayed parallel interference cancellation, resulting in amplified interference noise due to the reliance on filtering processes that cannot start early, causing distortion in service data reception during multi-user concurrency.

Innovation Solution

A data processing device and method that employs a control channel model simple estimation apparatus, linear prediction, pilot reconstruction, and control channel interference cancellation to perform early parallel interference cancellation by excluding filtering in the estimation process, allowing for rapid channel estimation and noise reduction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If filtering process is used in control channel model estimation, then measurement precision is improved, but loss of time increases

Engineering Contradiction:

Improvechannel estimation precisionVSAvoidtime for obtaining channel estimation results

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent segments the channel estimation process into two distinct parts: (1) a simple estimation step that quickly obtains initial channel estimates without filtering, and (2) a separate interference cancellation step that applies filtering to remove multi-user interference. This segmentation allows the system to get quick initial estimates while still achieving precise final results through the subsequent interference cancellation process.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary simple channel estimation before interference cancellation to obtain initial channel estimates quickly. This preliminary action provides a starting point for the subsequent filtering and interference cancellation process, enabling the system to begin processing earlier than traditional methods that require complete filtering before any estimation can occur.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If filtering process is used in channel estimation, then reliability is improved, but productivity decreases

Engineering Contradiction:

Improvereliability of channel estimationVSAvoidspeed of parallel interference cancellation

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent performs preliminary simple channel estimation before interference cancellation to obtain initial channel estimates quickly. This preliminary action provides a starting point for the subsequent filtering and interference cancellation process, enabling the system to begin processing earlier than traditional methods that require complete filtering before any estimation can occur.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent establishes a continuous processing pipeline where simple estimation, interference cancellation, and refined estimation occur in sequence without idle waiting periods. The system continuously processes channel estimates through multiple stages rather than waiting for one complete filtering process to finish before beginning any estimation work.

Inventive Principle:

Principle #20Continuity of useful action

3Loss of time

If simple estimation without filtering is used, then loss of time is reduced, but measurement precision deteriorates

Engineering Contradiction:

Improvetime for obtaining channel estimation resultsVSAvoidchannel estimation precision

Core Design Contradiction:

Loss of timeVSMeasurement precision

Solution Approach 1:

The patent segments the channel estimation process into two distinct parts: (1) a simple estimation step that quickly obtains initial channel estimates without filtering, and (2) a separate interference cancellation step that applies filtering to remove multi-user interference. This segmentation allows the system to get quick initial estimates while still achieving precise final results through the subsequent interference cancellation process.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent uses feedback from the simple estimation results to guide the interference cancellation process. The initial estimates obtained quickly are fed into the interference cancellation stage, which refines them by removing multi-user interference. This feedback loop allows the system to iteratively improve precision starting from quick initial estimates.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS9847890B2Data processing device and method for control channel simple estimation

Publication Date: 2017.12.19 HONOR DEVICE CO LTD

AI summary

A data processing device includes a control channel model simple estimation apparatus performs control channel simple estimation, which does not include filter processing, a linear prediction apparatus performs linear prediction on a result obtained by the simple estimation, a pilot reconstruction apparatus reconstructs a first estimation result obtained by the linear prediction, a control channel data regeneration apparatus regenerates a pilot part in antenna data of a control channel of the user, and a control channel interference canceller removes the regenerated pilot part from antenna data of multiple users in order to obtain a control parameter part of the antenna data of the control channels of the multiple users.