Mobile wireless communications device having low if receiver circuitry that adapts to radio environment

A communication equipment and mobile wireless technology, applied in the field of receiver circuits and mobile wireless communication equipment, can solve the problems of not being able to know the external environment, bad interference performance of data streams, not considering signal types, etc.

Active Publication Date: 2007-11-21
RES IN MOTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Typically, no knowledge of the external environment
Furthermore, the type of signal used during the reception session is not taken into account, leading to worst-case scenarios when, for example, distorted signal pulses are mixed with received signal strength indication (RSSI) measurements, and the resulting data stream exhibits worst-case interference behavior

Method used

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  • Mobile wireless communications device having low if receiver circuitry that adapts to radio environment
  • Mobile wireless communications device having low if receiver circuitry that adapts to radio environment
  • Mobile wireless communications device having low if receiver circuitry that adapts to radio environment

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Embodiment Construction

[0023] Various embodiments are described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments are shown. Many different forms may be proposed and described, and the embodiments should not be construed as limited to those set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope to those skilled in the art. Like reference numerals in the drawings indicate like elements.

[0024] According to one non-limiting example, by adjusting radio frequency (RF) circuit configurations "at runtime" based on the "quality" of the current radio environment, limitations such as those caused by extended calibration times can be overcome. Thus, the problem solved is stronger rejection of narrowband (unmodulated) interference, which is solved by placing the interference in the baseband frequency where the highest out-of-band signal attenuation is achieved. Since mos...

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Abstract

A mobile wireless communications device, system and associated method includes a housing and circuit board that includes radio frequency (RF) circuitry and processor operative with each other. The RF circuitry includes a low-IF receiver circuit that is operative for maintaining an interferer signal at a same frequency side as a wanted signal relative to a local oscillator frequency setting, creating an interferer image signal, and filtering the image signal as substantially baseband frequency.

Description

technical field [0001] The present invention relates to the field of communication devices, and more particularly to mobile wireless communication devices and related systems and methods that use receiver circuitry adapted to the radio environment. Background technique [0002] Cellular communication systems are becoming more and more popular and have become an integral part of personal and business communications. Cellular phones and similar devices allow users to make and receive phone calls anywhere they travel. Furthermore, due to the growth of cellular telephony technology, so has the functionality of cellular devices. For example, a variety of cellular devices now incorporate Personal Digital Assistant (PDA) features such as calendars, address books, task lists, calculators, memo and writing programs, and the like. These multifunction devices typically allow users to wirelessly send and receive electronic mail (email) messages and access the Internet through, for exa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/16H04Q7/32
CPCH04B1/30H04B1/1036
Inventor 奥莱克西·克拉韦茨
Owner RES IN MOTION LTD
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