Demodulation of Bluetooth GFSK signals under carrier frequency error conditions

2003 ◽  
Author(s):  
C. Robinson ◽  
A. Purvis
Keyword(s):  
Carrier Frequency ◽  
Frequency Error

A Design of Wireless Transmission System

2011 ◽  
Vol 187 ◽  
pp. 621-624 ◽  
Author(s):  
Xiao Yan Huang ◽  
Wei Su
Keyword(s):  
Carrier Frequency ◽  
Experimental Tests ◽  
Transmission System ◽  
Wireless Transmission ◽  
Modulation Scheme ◽  
Data Detection ◽  
Frequency Error ◽  
Main Body ◽  
Analog Signals ◽  
Water Temperature Data

To design a wireless transmission system for water temperature data detection .This system uses FM as modulation scheme. The launching part adopts MC12017 and MC145152 as PLL, enabling to decrease the carrier frequency error to 1.8×10-4. The carrier frequency modulation is achieved by transfiguration diode HS113 and integrated VCO MC1648. The final stage amplifier adopts triode 2SC2053 with transmission power amounting to 0.245 mw. The receiving part adopts FM receiver chip MC3362 with low consumption and narrowband as main body, analog signals being amplified by LM386. C8051F410 is used as the control chip in the whole system to decode, frequency measure, and display. Experimental tests show that this system consumes lower power, reliable and steady, and is able to correctly transmit and receive data.

scholarly journals Vector Tracking Algorithm Based on Adaptive Cubature Kalman Filter

2018 ◽  
Vol 36 (6) ◽  
pp. 1108-1115
Author(s):  
Xiaojun Zou ◽  
Baowang Lian ◽  
Zesheng Dan
Keyword(s):  
Kalman Filter ◽  
Carrier Frequency ◽  
Phase Error ◽  
Tracking Algorithm ◽  
Frequency Error ◽  
Test Results ◽  
Tracking Loop ◽  
Cubature Kalman Filter ◽  
Vector Tracking ◽  
Present Algorithm

In the vector tracking loop, there is a great error in the output of discriminator owing to the disturbance of noise. Cubature Kalman filter is proposed to replace the discriminator to process I/Q data and generate code phase error and the carrier frequency error in this paper. The present algorithm not only can avoid the nonlinear problem of discriminator, but also can reduce the bad effect of noise. Moreover, using cubature Kalman filter to deal with the nonlinear I/Q data is beneficial to preserve the accuracy of data processing. Because noise is unknown or time-varying, the filter should have the ability to respond to the changes of environmental noise. The innovation of measurements is used to estimate the covariance matrix of measurement noise in real time. Finally, a comparison is carried out between the present algorithm and the vector tracking algorithm based on discriminator. The test results show that the code phase error and the carrier frequency error are smaller, and the accuracy of navigation solution is also higher.

High-Carrier-Frequency Iron-Loss Characteristics Excited by GaN FET Single-Phase PWM Inverter

2016 ◽  
Vol 136 (2) ◽  
pp. 110-117 ◽  
Author(s):  
Takahiro Tanaka ◽  
Shoko Koga ◽  
Ryosuke Kogi ◽  
Shunya Odawara ◽  
Keisuke Fujisaki
Keyword(s):  
Carrier Frequency ◽  
Single Phase ◽  
Iron Loss ◽  
Pwm Inverter ◽  
High Carrier ◽  
Gan Fet

An Interference Rejection Combining Technique for an SFBC-OFDM System with Multiple Carrier Frequency Offsets

2016 ◽  
Vol E99.B (2) ◽  
pp. 481-487
Author(s):  
Mina LEE ◽  
Rothna PEC ◽  
Kyu Seok KIM ◽  
Chang Hwan PARK ◽  
Yong Soo CHO
Keyword(s):  
Carrier Frequency ◽  
Interference Rejection ◽  
Ofdm System ◽  
Carrier Frequency Offsets ◽  
Frequency Offsets
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