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Cellular up-link harmonic spurs mitigation in wi-fi and bluetooth receivers

A receiver, spurious technology, applied in transmission noise suppression, reduction of interference caused by sinusoidal oscillation, short-range communication services, etc., can solve the problems of complex and expensive TDM

Active Publication Date: 2016-06-22
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, designing linear amplifiers and using TDM can be more complex and expensive for variable frequency harmonic spurs

Method used

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  • Cellular up-link harmonic spurs mitigation in wi-fi and bluetooth receivers
  • Cellular up-link harmonic spurs mitigation in wi-fi and bluetooth receivers
  • Cellular up-link harmonic spurs mitigation in wi-fi and bluetooth receivers

Examples

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Embodiment Construction

[0013] Described herein are techniques for achieving harmonic spur reduction at a receiver of a portable device. For example, a receiver of a portable device receives radio frequency (RF) signals comprising Wi-Fi data packets. In this example, the reception of the RF signal operates in conjunction with the uplink cellular transmission from a cellular modem within the same device.

[0014] To suppress the effects of harmonic spurs of cooperating uplink cellular transmissions, or any other known spurs in the system affecting the RF signal, the notch filter is configured to filter the cooperating uplink cellular transmissions Interfering harmonic frequencies that may affect the desensitivity of the receiver of the portable device. For example, a notch filter can be configured to operate at an interfering center frequency to remove harmonic spurs generated by uplink cellular transmissions.

[0015] In the case of filtered uplink cellular transmission, the received RF signal is t...

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PUM

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Abstract

An interfering signal from a co-running modem is filtered using a notch filter to cancel high frequency harmonic interference to a received radio frequency (RF) signal. Thereafter, a metric scaling and tone nulling are performed in the received RF signal to further eliminate residual harmonic frequencies.

Description

technical field [0001] The present disclosure relates generally to wireless communication systems, and more particularly to cellular uplink harmonic spur suppression in Wi-Fi and Bluetooth receivers. Background technique [0002] A wireless communication system may use one or more channels to transmit data between a transmitter and receiver. These communication systems may operate according to a set of standards defined by the Institute of Electrical and Electronics Engineers (IEEE) 802.11 committee for Wireless Local Area Network (WLAN) communications. [0003] During the transmission of data between a transmitter and a receiver, multipath problems and other conditions such as the presence of harmonic spurs may affect the reception of data packets. For example, the presence of harmonic spurs that may intermingle with the reception of data packets can cause problems for signal detection, amplifier gain adjustment, and signal decoding. To this end, wireless communication sy...

Claims

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Application Information

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IPC IPC(8): H04B1/10H04W4/80
CPCH04B1/109H04B1/525H04W4/80H04B15/06H04B1/0475H04B1/10H04B15/00H04B1/7103
Inventor 阿西·雅各比阿萨夫·古雷维兹罗特姆·雅维维希蒙·索洛德金布鲁诺·泽舒
Owner APPLE INC
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