Dependable Optically Reconfigurable Gate Array with a Phase-Modulation Type Holographic Memory

2011 ◽  
Author(s):  
Takahiro Watanabe ◽  
Minoru Watanabe
Keyword(s):  
Phase Modulation ◽  
Holographic Memory ◽  
Modulation Type ◽  
Gate Array

scholarly journals Digital Component Separator for future W-CDMA-LINC Transmitters implemented on an FPGA

2005 ◽  
Vol 3 ◽  
pp. 239-246
Author(s):  
W. Gerhard ◽  
R. Knöchel
Keyword(s):  
Field Programmable Gate Array ◽  
Phase Modulation ◽  
Sampling Frequency ◽  
Linear Amplification ◽  
A Value ◽  
Symbol Rate ◽  
Measurement Results ◽  
Field Programmable ◽  
Gate Array ◽  
Nonlinear Components

Abstract. This paper presents the implementation of a Digital-Component-Separator (DCS) for a LINC-transmitter (linear amplification using nonlinear components) on an FPGA (field programmable gate array). It investigates and estimates the bandwidth requirements for such a LINC system. The influence of bandwidth limitations on a digitally based LINC-transmitter for W-CDMA utilization is studied by simulations. Furthermore a LINC transmitter is proposed which employs a flexible image-reject- or a direct up-conversion-architecture for transmission of single or combined multi-carrier/channel W-CDMA signals using the phase-modulation approach. The sampling frequency can be chosen at a value up to 32 times (122.88MHz) the symbol rate of the W-CDMA chip rate of 3.84Mbits/s. Measurement results for a LINC transmitter are presented and discussed.

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