Method and apparatus providing calibration technique for RF performance tuning

A technology for calibrating signals and communication equipment, applied in radio transmission systems, transmission monitoring, electrical components, etc., can solve problems such as unacceptable resonance frequency accuracy and increased costs, and achieve cost and complexity reduction, power consumption reduction, and energy saving Effect of IC Area

Inactive Publication Date: 2008-05-28
NOKIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

While resonant circuits with adequate performance are achievable using current IC technology, the accuracy of the resonant frequen

Method used

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  • Method and apparatus providing calibration technique for RF performance tuning
  • Method and apparatus providing calibration technique for RF performance tuning
  • Method and apparatus providing calibration technique for RF performance tuning

Examples

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Embodiment Construction

[0096] In order to put the present invention into an appropriate technical context, first refer to Figure 14 , which illustrates a simplified block diagram of an embodiment of a wireless communication system including at least one mobile station (MS) 100 suitable for practicing the present invention. Figure 14 Also shown is an example network operator having, for example: a GPRS Support Node (GSN) 30 for connecting to a communication network such as a Public Packet Data Network or PDN; at least one Base Station Controller (BSC) 40 and a plurality of base transceiver stations (BTS) 50, which transmit to the mobile station 100 in physical and logical channels in the forward or downlink direction according to a predetermined air interface standard. Each BTS 50 is assumed to support one cell. There is also a reverse or uplink communication path from the mobile station 100 to the network operator, which conveys mobile initiated access requests and traffic.

[0097] The air inte...

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PUM

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Abstract

A method is disclosed for operating a RF receiver of a communications equipment, as is circuitry for implementing the method. The method includes, while operating under the control of a data processor of the communications equipment, generating a calibration signal; injecting the calibration signal into a low noise amplifier (LNA) of the RF receiver; measuring a downconverted response of the receiver at a plurality of different frequencies of the calibration signal, or measuring the downconverted response of the receiver at a plurality of different LNA tuning combinations using a fixed calibration frequency, and at least one of tuning a resonance frequency of at least one LNA resonator based on the measured downconverted response so as to compensate at least for variations in component values that comprise the at least one resonator, or adjusting the linearity of the receiver.

Description

technical field [0001] These teachings relate generally to radio frequency (RF) receivers, and more particularly to methods and apparatus for optimizing the performance of radio frequency receivers such as those found in cellular telephones and other types of mobile communication devices and terminals. Background technique [0002] Define the following abbreviations. [0003] ADC Analog-to-Digital Converter [0004] AM Amplitude Modulation [0005] ASIC application specific integrated circuit [0006] BB baseband [0007] CDMA code division multiple access [0008] CMRR common mode rejection ratio [0009] CPU central processing unit [0010] DS-CDMA direct sequence CDMA [0011] DSP digital signal processing [0012] FDD frequency division duplex [0013] FM frequency modulation [0014] FPGA Field Programmable Gate Array [0015] IC integrated circuit [0016] ICP input compression point [0017] IF intermediate frequency [0018] IIP2 Second order input inte...

Claims

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Application Information

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IPC IPC(8): H04B7/00H04B1/10H04B1/28H04B17/00
CPCH04B17/0062H04B1/28H04B17/004H04B1/30H04B17/0057H04B17/20H04B17/21H04B17/318H04B17/00H04B7/00H04B1/06H04B1/10
Inventor 波利·塞皮南阿诺·帕辛南米凯尔·古斯塔夫森米卡·马基塔洛
Owner NOKIA CORP
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