Channel Estimation Buffer Compression via Decimation

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Solution Overview

Problem

The increasing number of component carriers and antennas in communication systems leads to a significant increase in channel estimation buffer size, occupying a substantial portion of integrated circuits, which existing technologies have not effectively addressed.

Innovation Solution

A method involving a receiver and processor that compresses channel estimates by decimating a subset of the estimates, generating predicted channel estimates, computing and compressing errors, and approximating the original estimates to reduce buffer size, utilizing techniques such as linear interpolation and pseudo floating-point representation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the number of component carriers and antennas is increased to support multiple antennas and modulation carriers, then the communication system's bandwidth and capacity are improved, but the channel estimation buffer size increases and occupies a significant portion of the integrated circuit

Engineering Contradiction:

Improvecommunication system capacityVSAvoidbuffer size

Core Design Contradiction:

ProductivityVSVolume of stationary object

Solution Approach 1:

The patent divides the channel estimation buffer into multiple segments corresponding to different component carriers and antenna groups. By segmenting the buffer storage, the system can manage and compress each segment independently, reducing the overall buffer size requirement while maintaining support for multiple carriers and antennas

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the representation parameters of channel estimates by transitioning from storing complete channel estimation data to storing only differential values or compressed representations. This parameter transformation reduces the buffer size while preserving the essential channel information needed for coherent detection

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If all channel estimates are stored in the buffer for accurate data demodulation, then the measurement precision is improved, but the device complexity increases due to larger buffer requirements

Engineering Contradiction:

Improvechannel estimation accuracyVSAvoidbuffer memory requirements

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent creates a compressed copy of the channel estimation data by storing differential values or predicted error terms instead of complete channel estimates. This copying approach maintains the necessary information for accurate demodulation while significantly reducing the buffer memory requirements and device complexity

Inventive Principle:

Principle #26Copying

Data Source

PatentUS9692616B1Apparatus for and method of channel estimation buffer compression via decimation, prediction, and error encoding

Publication Date: 2017.06.27 SAMSUNG ELECTRONICS CO LTD

AI summary

An apparatus and a method are provided. The apparatus includes a receiver configured to receive a signal over channels, a channel estimator configured to estimate the channels as first channel estimates; and a processor configured to compress the channel estimates to reduce buffer size. The method includes receiving a signal over channels by a receiver, estimating, by a channel estimator, the channels as a first channel estimate; and compressing, by a processor, the channel estimates to reduce buffer size.