Programmable WiFi Receiver Chain for Lower ADC Power Use

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Solution Overview

Problem

Current WiFi receivers consume significant power due to dedicated filters and ADCs in each receive path, making them energy inefficient.

Innovation Solution

A WiFi transceiver with a unified base-band receiver chain featuring a programmable Rx filter and ADC with adjustable bandwidth, which dynamically adapts to both receive and transmit modes, replacing dedicated filters and ADCs to optimize energy efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If dedicated filters and ADCs are used in each receive path, then signal processing capability is improved, but power consumption increases

Engineering Contradiction:
Improvesignal processing capabilityVSAvoidpower consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements a unified base-band receiver chain that serves multiple receive paths (e.g., multiple antennas or signal streams) using shared filters and ADCs. This multi-functional architecture allows the same hardware components to process signals from different paths sequentially or concurrently, eliminating the need for dedicated filters and ADCs in each path while maintaining signal processing capability.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines previously separate filter and ADC components for each receive path into a single shared receiver chain. By merging these components, the system reduces the total number of power-consuming elements while preserving the necessary signal processing functions through time-division or space-division multiplexing techniques.

Inventive Principle:
Principle #5Merging (Combining)

2Reliability

If multiple dedicated filters and ADCs are implemented, then receive path performance is improved, but device complexity increases

Engineering Contradiction:
Improvereceive path performanceVSAvoidnumber of components
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The unified receiver chain is designed to handle multiple receive paths through configurable switching and time-division multiplexing. The same filter and ADC components can be dynamically allocated to different receive paths based on current processing needs, reducing the total component count while maintaining the ability to process multiple signals effectively.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system employs dynamic resource allocation where the shared filter and ADC components can be reconfigured in real-time to serve different receive paths. This dynamic switching allows the system to adapt component usage based on traffic patterns and signal requirements, optimizing performance while minimizing the number of physical components needed.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS11716102B2Multi-purpose receiver chain for wifi applications
Publication Date: 2023.08.01 INTEL CORP
  • US11716102B2 patent drawing
  • US11716102B2 patent drawing
  • US11716102B2 patent drawing

AI summary

An energy-efficient implementation of a WiFi transceiver is proposed in this disclosure. The WiFi transceiver comprises a receive chain comprising a variable receive (Rx) filter circuit and a variable Rx analog-to-digital converter (ADC) circuit. The receive chain is configured to receive a receive signal during a receive mode of operation, having a receive bandwidth associated therewith and receive a transmit signal associated with a transmit chain of the transceiver during a transmit mode of operation, having a transmit bandwidth associated therewith. The WiFi transceiver further comprises a control circuit configured to dynamically adapt a bandwidth of the variable Rx filter and the variable Rx ADC in the receive chain to the receive bandwidth or to the transmit bandwidth, based on the mode of operation.